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# Copyright (C) 2006, 2007 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Functions used by the node daemon
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@var _ALLOWED_UPLOAD_FILES: denotes which files are accepted in
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the L{UploadFile} function
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@var _ALLOWED_CLEAN_DIRS: denotes which directories are accepted
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in the L{_CleanDirectory} function
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"""
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# pylint: disable-msg=E1103
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# E1103: %s %r has no %r member (but some types could not be
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# inferred), because the _TryOSFromDisk returns either (True, os_obj)
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# or (False, "string") which confuses pylint
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import os |
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import os.path |
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import shutil |
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import time |
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import stat |
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import errno |
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import re |
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import random |
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import logging |
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import tempfile |
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import zlib |
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import base64 |
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from ganeti import errors |
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from ganeti import utils |
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from ganeti import ssh |
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from ganeti import hypervisor |
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from ganeti import constants |
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from ganeti import bdev |
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from ganeti import objects |
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from ganeti import ssconf |
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_BOOT_ID_PATH = "/proc/sys/kernel/random/boot_id"
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_ALLOWED_CLEAN_DIRS = frozenset([
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constants.DATA_DIR, |
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constants.JOB_QUEUE_ARCHIVE_DIR, |
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constants.QUEUE_DIR, |
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]) |
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class RPCFail(Exception): |
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"""Class denoting RPC failure.
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Its argument is the error message.
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"""
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def _Fail(msg, *args, **kwargs): |
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"""Log an error and the raise an RPCFail exception.
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This exception is then handled specially in the ganeti daemon and
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turned into a 'failed' return type. As such, this function is a
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useful shortcut for logging the error and returning it to the master
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daemon.
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@type msg: string
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@param msg: the text of the exception
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@raise RPCFail
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"""
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if args:
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msg = msg % args |
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if "log" not in kwargs or kwargs["log"]: # if we should log this error |
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if "exc" in kwargs and kwargs["exc"]: |
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logging.exception(msg) |
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else:
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logging.error(msg) |
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raise RPCFail(msg)
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def _GetConfig(): |
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"""Simple wrapper to return a SimpleStore.
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@rtype: L{ssconf.SimpleStore}
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@return: a SimpleStore instance
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"""
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return ssconf.SimpleStore()
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def _GetSshRunner(cluster_name): |
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"""Simple wrapper to return an SshRunner.
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@type cluster_name: str
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@param cluster_name: the cluster name, which is needed
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by the SshRunner constructor
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@rtype: L{ssh.SshRunner}
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@return: an SshRunner instance
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"""
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return ssh.SshRunner(cluster_name)
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def _Decompress(data): |
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"""Unpacks data compressed by the RPC client.
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@type data: list or tuple
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@param data: Data sent by RPC client
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@rtype: str
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@return: Decompressed data
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"""
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assert isinstance(data, (list, tuple)) |
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assert len(data) == 2 |
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(encoding, content) = data |
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if encoding == constants.RPC_ENCODING_NONE:
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return content
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elif encoding == constants.RPC_ENCODING_ZLIB_BASE64:
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return zlib.decompress(base64.b64decode(content))
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else:
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raise AssertionError("Unknown data encoding") |
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def _CleanDirectory(path, exclude=None): |
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"""Removes all regular files in a directory.
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@type path: str
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@param path: the directory to clean
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@type exclude: list
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@param exclude: list of files to be excluded, defaults
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to the empty list
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"""
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if path not in _ALLOWED_CLEAN_DIRS: |
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_Fail("Path passed to _CleanDirectory not in allowed clean targets: '%s'",
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path) |
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if not os.path.isdir(path): |
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return
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if exclude is None: |
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exclude = [] |
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else:
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# Normalize excluded paths
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exclude = [os.path.normpath(i) for i in exclude] |
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for rel_name in utils.ListVisibleFiles(path): |
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full_name = utils.PathJoin(path, rel_name) |
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if full_name in exclude: |
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continue
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if os.path.isfile(full_name) and not os.path.islink(full_name): |
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utils.RemoveFile(full_name) |
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def _BuildUploadFileList(): |
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"""Build the list of allowed upload files.
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This is abstracted so that it's built only once at module import time.
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"""
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allowed_files = set([
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constants.CLUSTER_CONF_FILE, |
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constants.ETC_HOSTS, |
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constants.SSH_KNOWN_HOSTS_FILE, |
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constants.VNC_PASSWORD_FILE, |
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constants.RAPI_CERT_FILE, |
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constants.RAPI_USERS_FILE, |
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constants.CONFD_HMAC_KEY, |
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]) |
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for hv_name in constants.HYPER_TYPES: |
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hv_class = hypervisor.GetHypervisorClass(hv_name) |
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allowed_files.update(hv_class.GetAncillaryFiles()) |
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return frozenset(allowed_files) |
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_ALLOWED_UPLOAD_FILES = _BuildUploadFileList() |
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def JobQueuePurge(): |
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"""Removes job queue files and archived jobs.
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@rtype: tuple
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@return: True, None
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"""
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_CleanDirectory(constants.QUEUE_DIR, exclude=[constants.JOB_QUEUE_LOCK_FILE]) |
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_CleanDirectory(constants.JOB_QUEUE_ARCHIVE_DIR) |
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def GetMasterInfo(): |
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"""Returns master information.
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This is an utility function to compute master information, either
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for consumption here or from the node daemon.
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@rtype: tuple
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@return: master_netdev, master_ip, master_name
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@raise RPCFail: in case of errors
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"""
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try:
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cfg = _GetConfig() |
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master_netdev = cfg.GetMasterNetdev() |
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master_ip = cfg.GetMasterIP() |
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master_node = cfg.GetMasterNode() |
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except errors.ConfigurationError, err:
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_Fail("Cluster configuration incomplete: %s", err, exc=True) |
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return (master_netdev, master_ip, master_node)
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def StartMaster(start_daemons, no_voting): |
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"""Activate local node as master node.
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The function will always try activate the IP address of the master
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(unless someone else has it). It will also start the master daemons,
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based on the start_daemons parameter.
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@type start_daemons: boolean
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@param start_daemons: whether to also start the master
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daemons (ganeti-masterd and ganeti-rapi)
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@type no_voting: boolean
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@param no_voting: whether to start ganeti-masterd without a node vote
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(if start_daemons is True), but still non-interactively
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@rtype: None
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"""
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# GetMasterInfo will raise an exception if not able to return data
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master_netdev, master_ip, _ = GetMasterInfo() |
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err_msgs = [] |
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if utils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
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if utils.OwnIpAddress(master_ip):
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# we already have the ip:
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logging.debug("Master IP already configured, doing nothing")
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else:
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msg = "Someone else has the master ip, not activating"
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logging.error(msg) |
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err_msgs.append(msg) |
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else:
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result = utils.RunCmd(["ip", "address", "add", "%s/32" % master_ip, |
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"dev", master_netdev, "label", |
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"%s:0" % master_netdev])
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if result.failed:
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msg = "Can't activate master IP: %s" % result.output
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logging.error(msg) |
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err_msgs.append(msg) |
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result = utils.RunCmd(["arping", "-q", "-U", "-c 3", "-I", master_netdev, |
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"-s", master_ip, master_ip])
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# we'll ignore the exit code of arping
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# and now start the master and rapi daemons
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if start_daemons:
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if no_voting:
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masterd_args = "--no-voting --yes-do-it"
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else:
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masterd_args = ""
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env = { |
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"EXTRA_MASTERD_ARGS": masterd_args,
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} |
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result = utils.RunCmd([constants.DAEMON_UTIL, "start-master"], env=env)
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if result.failed:
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msg = "Can't start Ganeti master: %s" % result.output
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logging.error(msg) |
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err_msgs.append(msg) |
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if err_msgs:
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_Fail("; ".join(err_msgs))
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def StopMaster(stop_daemons): |
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"""Deactivate this node as master.
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The function will always try to deactivate the IP address of the
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master. It will also stop the master daemons depending on the
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stop_daemons parameter.
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@type stop_daemons: boolean
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@param stop_daemons: whether to also stop the master daemons
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(ganeti-masterd and ganeti-rapi)
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@rtype: None
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"""
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# TODO: log and report back to the caller the error failures; we
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# need to decide in which case we fail the RPC for this
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# GetMasterInfo will raise an exception if not able to return data
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master_netdev, master_ip, _ = GetMasterInfo() |
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result = utils.RunCmd(["ip", "address", "del", "%s/32" % master_ip, |
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"dev", master_netdev])
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if result.failed:
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logging.error("Can't remove the master IP, error: %s", result.output)
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# but otherwise ignore the failure
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if stop_daemons:
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result = utils.RunCmd([constants.DAEMON_UTIL, "stop-master"])
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if result.failed:
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logging.error("Could not stop Ganeti master, command %s had exitcode %s"
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" and error %s",
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result.cmd, result.exit_code, result.output) |
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def AddNode(dsa, dsapub, rsa, rsapub, sshkey, sshpub): |
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"""Joins this node to the cluster.
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This does the following:
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- updates the hostkeys of the machine (rsa and dsa)
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- adds the ssh private key to the user
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- adds the ssh public key to the users' authorized_keys file
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@type dsa: str
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@param dsa: the DSA private key to write
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@type dsapub: str
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@param dsapub: the DSA public key to write
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@type rsa: str
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@param rsa: the RSA private key to write
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@type rsapub: str
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@param rsapub: the RSA public key to write
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@type sshkey: str
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@param sshkey: the SSH private key to write
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@type sshpub: str
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@param sshpub: the SSH public key to write
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@rtype: boolean
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@return: the success of the operation
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"""
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sshd_keys = [(constants.SSH_HOST_RSA_PRIV, rsa, 0600),
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(constants.SSH_HOST_RSA_PUB, rsapub, 0644),
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(constants.SSH_HOST_DSA_PRIV, dsa, 0600),
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(constants.SSH_HOST_DSA_PUB, dsapub, 0644)]
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for name, content, mode in sshd_keys: |
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utils.WriteFile(name, data=content, mode=mode) |
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try:
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priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS, |
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mkdir=True)
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except errors.OpExecError, err:
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_Fail("Error while processing user ssh files: %s", err, exc=True) |
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for name, content in [(priv_key, sshkey), (pub_key, sshpub)]: |
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utils.WriteFile(name, data=content, mode=0600)
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utils.AddAuthorizedKey(auth_keys, sshpub) |
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result = utils.RunCmd([constants.DAEMON_UTIL, "reload-ssh-keys"])
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if result.failed:
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_Fail("Unable to reload SSH keys (command %r, exit code %s, output %r)",
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result.cmd, result.exit_code, result.output) |
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def LeaveCluster(modify_ssh_setup): |
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"""Cleans up and remove the current node.
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This function cleans up and prepares the current node to be removed
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from the cluster.
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If processing is successful, then it raises an
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L{errors.QuitGanetiException} which is used as a special case to
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shutdown the node daemon.
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@param modify_ssh_setup: boolean
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"""
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_CleanDirectory(constants.DATA_DIR) |
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JobQueuePurge() |
389 |
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if modify_ssh_setup:
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try:
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priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS) |
393 |
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utils.RemoveAuthorizedKey(auth_keys, utils.ReadFile(pub_key)) |
395 |
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utils.RemoveFile(priv_key) |
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utils.RemoveFile(pub_key) |
398 |
except errors.OpExecError:
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logging.exception("Error while processing ssh files")
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try:
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utils.RemoveFile(constants.CONFD_HMAC_KEY) |
403 |
utils.RemoveFile(constants.RAPI_CERT_FILE) |
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utils.RemoveFile(constants.NODED_CERT_FILE) |
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except: # pylint: disable-msg=W0702 |
406 |
logging.exception("Error while removing cluster secrets")
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result = utils.RunCmd([constants.DAEMON_UTIL, "stop", constants.CONFD])
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if result.failed:
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logging.error("Command %s failed with exitcode %s and error %s",
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result.cmd, result.exit_code, result.output) |
412 |
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# Raise a custom exception (handled in ganeti-noded)
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raise errors.QuitGanetiException(True, 'Shutdown scheduled') |
415 |
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def GetNodeInfo(vgname, hypervisor_type): |
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"""Gives back a hash with different information about the node.
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420 |
@type vgname: C{string}
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@param vgname: the name of the volume group to ask for disk space information
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@type hypervisor_type: C{str}
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@param hypervisor_type: the name of the hypervisor to ask for
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memory information
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@rtype: C{dict}
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@return: dictionary with the following keys:
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- vg_size is the size of the configured volume group in MiB
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- vg_free is the free size of the volume group in MiB
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- memory_dom0 is the memory allocated for domain0 in MiB
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- memory_free is the currently available (free) ram in MiB
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- memory_total is the total number of ram in MiB
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432 |
|
433 |
"""
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outputarray = {} |
435 |
vginfo = _GetVGInfo(vgname) |
436 |
outputarray['vg_size'] = vginfo['vg_size'] |
437 |
outputarray['vg_free'] = vginfo['vg_free'] |
438 |
|
439 |
hyper = hypervisor.GetHypervisor(hypervisor_type) |
440 |
hyp_info = hyper.GetNodeInfo() |
441 |
if hyp_info is not None: |
442 |
outputarray.update(hyp_info) |
443 |
|
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outputarray["bootid"] = utils.ReadFile(_BOOT_ID_PATH, size=128).rstrip("\n") |
445 |
|
446 |
return outputarray
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447 |
|
448 |
|
449 |
def VerifyNode(what, cluster_name): |
450 |
"""Verify the status of the local node.
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451 |
|
452 |
Based on the input L{what} parameter, various checks are done on the
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local node.
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454 |
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455 |
If the I{filelist} key is present, this list of
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456 |
files is checksummed and the file/checksum pairs are returned.
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457 |
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458 |
If the I{nodelist} key is present, we check that we have
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connectivity via ssh with the target nodes (and check the hostname
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report).
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|
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If the I{node-net-test} key is present, we check that we have
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connectivity to the given nodes via both primary IP and, if
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applicable, secondary IPs.
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465 |
|
466 |
@type what: C{dict}
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@param what: a dictionary of things to check:
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468 |
- filelist: list of files for which to compute checksums
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469 |
- nodelist: list of nodes we should check ssh communication with
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470 |
- node-net-test: list of nodes we should check node daemon port
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connectivity with
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- hypervisor: list with hypervisors to run the verify for
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@rtype: dict
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474 |
@return: a dictionary with the same keys as the input dict, and
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values representing the result of the checks
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|
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"""
|
478 |
result = {} |
479 |
my_name = utils.HostInfo().name |
480 |
port = utils.GetDaemonPort(constants.NODED) |
481 |
|
482 |
if constants.NV_HYPERVISOR in what: |
483 |
result[constants.NV_HYPERVISOR] = tmp = {} |
484 |
for hv_name in what[constants.NV_HYPERVISOR]: |
485 |
try:
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val = hypervisor.GetHypervisor(hv_name).Verify() |
487 |
except errors.HypervisorError, err:
|
488 |
val = "Error while checking hypervisor: %s" % str(err) |
489 |
tmp[hv_name] = val |
490 |
|
491 |
if constants.NV_FILELIST in what: |
492 |
result[constants.NV_FILELIST] = utils.FingerprintFiles( |
493 |
what[constants.NV_FILELIST]) |
494 |
|
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if constants.NV_NODELIST in what: |
496 |
result[constants.NV_NODELIST] = tmp = {} |
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random.shuffle(what[constants.NV_NODELIST]) |
498 |
for node in what[constants.NV_NODELIST]: |
499 |
success, message = _GetSshRunner(cluster_name).VerifyNodeHostname(node) |
500 |
if not success: |
501 |
tmp[node] = message |
502 |
|
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if constants.NV_NODENETTEST in what: |
504 |
result[constants.NV_NODENETTEST] = tmp = {} |
505 |
my_pip = my_sip = None
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506 |
for name, pip, sip in what[constants.NV_NODENETTEST]: |
507 |
if name == my_name:
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my_pip = pip |
509 |
my_sip = sip |
510 |
break
|
511 |
if not my_pip: |
512 |
tmp[my_name] = ("Can't find my own primary/secondary IP"
|
513 |
" in the node list")
|
514 |
else:
|
515 |
for name, pip, sip in what[constants.NV_NODENETTEST]: |
516 |
fail = [] |
517 |
if not utils.TcpPing(pip, port, source=my_pip): |
518 |
fail.append("primary")
|
519 |
if sip != pip:
|
520 |
if not utils.TcpPing(sip, port, source=my_sip): |
521 |
fail.append("secondary")
|
522 |
if fail:
|
523 |
tmp[name] = ("failure using the %s interface(s)" %
|
524 |
" and ".join(fail))
|
525 |
|
526 |
if constants.NV_MASTERIP in what: |
527 |
# FIXME: add checks on incoming data structures (here and in the
|
528 |
# rest of the function)
|
529 |
master_name, master_ip = what[constants.NV_MASTERIP] |
530 |
if master_name == my_name:
|
531 |
source = constants.LOCALHOST_IP_ADDRESS |
532 |
else:
|
533 |
source = None
|
534 |
result[constants.NV_MASTERIP] = utils.TcpPing(master_ip, port, |
535 |
source=source) |
536 |
|
537 |
if constants.NV_LVLIST in what: |
538 |
try:
|
539 |
val = GetVolumeList(what[constants.NV_LVLIST]) |
540 |
except RPCFail, err:
|
541 |
val = str(err)
|
542 |
result[constants.NV_LVLIST] = val |
543 |
|
544 |
if constants.NV_INSTANCELIST in what: |
545 |
# GetInstanceList can fail
|
546 |
try:
|
547 |
val = GetInstanceList(what[constants.NV_INSTANCELIST]) |
548 |
except RPCFail, err:
|
549 |
val = str(err)
|
550 |
result[constants.NV_INSTANCELIST] = val |
551 |
|
552 |
if constants.NV_VGLIST in what: |
553 |
result[constants.NV_VGLIST] = utils.ListVolumeGroups() |
554 |
|
555 |
if constants.NV_PVLIST in what: |
556 |
result[constants.NV_PVLIST] = \ |
557 |
bdev.LogicalVolume.GetPVInfo(what[constants.NV_PVLIST], |
558 |
filter_allocatable=False)
|
559 |
|
560 |
if constants.NV_VERSION in what: |
561 |
result[constants.NV_VERSION] = (constants.PROTOCOL_VERSION, |
562 |
constants.RELEASE_VERSION) |
563 |
|
564 |
if constants.NV_HVINFO in what: |
565 |
hyper = hypervisor.GetHypervisor(what[constants.NV_HVINFO]) |
566 |
result[constants.NV_HVINFO] = hyper.GetNodeInfo() |
567 |
|
568 |
if constants.NV_DRBDLIST in what: |
569 |
try:
|
570 |
used_minors = bdev.DRBD8.GetUsedDevs().keys() |
571 |
except errors.BlockDeviceError, err:
|
572 |
logging.warning("Can't get used minors list", exc_info=True) |
573 |
used_minors = str(err)
|
574 |
result[constants.NV_DRBDLIST] = used_minors |
575 |
|
576 |
if constants.NV_NODESETUP in what: |
577 |
result[constants.NV_NODESETUP] = tmpr = [] |
578 |
if not os.path.isdir("/sys/block") or not os.path.isdir("/sys/class/net"): |
579 |
tmpr.append("The sysfs filesytem doesn't seem to be mounted"
|
580 |
" under /sys, missing required directories /sys/block"
|
581 |
" and /sys/class/net")
|
582 |
if (not os.path.isdir("/proc/sys") or |
583 |
not os.path.isfile("/proc/sysrq-trigger")): |
584 |
tmpr.append("The procfs filesystem doesn't seem to be mounted"
|
585 |
" under /proc, missing required directory /proc/sys and"
|
586 |
" the file /proc/sysrq-trigger")
|
587 |
|
588 |
if constants.NV_TIME in what: |
589 |
result[constants.NV_TIME] = utils.SplitTime(time.time()) |
590 |
|
591 |
return result
|
592 |
|
593 |
|
594 |
def GetVolumeList(vg_name): |
595 |
"""Compute list of logical volumes and their size.
|
596 |
|
597 |
@type vg_name: str
|
598 |
@param vg_name: the volume group whose LVs we should list
|
599 |
@rtype: dict
|
600 |
@return:
|
601 |
dictionary of all partions (key) with value being a tuple of
|
602 |
their size (in MiB), inactive and online status::
|
603 |
|
604 |
{'test1': ('20.06', True, True)}
|
605 |
|
606 |
in case of errors, a string is returned with the error
|
607 |
details.
|
608 |
|
609 |
"""
|
610 |
lvs = {} |
611 |
sep = '|'
|
612 |
result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix", |
613 |
"--separator=%s" % sep,
|
614 |
"-olv_name,lv_size,lv_attr", vg_name])
|
615 |
if result.failed:
|
616 |
_Fail("Failed to list logical volumes, lvs output: %s", result.output)
|
617 |
|
618 |
valid_line_re = re.compile("^ *([^|]+)\|([0-9.]+)\|([^|]{6})\|?$")
|
619 |
for line in result.stdout.splitlines(): |
620 |
line = line.strip() |
621 |
match = valid_line_re.match(line) |
622 |
if not match: |
623 |
logging.error("Invalid line returned from lvs output: '%s'", line)
|
624 |
continue
|
625 |
name, size, attr = match.groups() |
626 |
inactive = attr[4] == '-' |
627 |
online = attr[5] == 'o' |
628 |
virtual = attr[0] == 'v' |
629 |
if virtual:
|
630 |
# we don't want to report such volumes as existing, since they
|
631 |
# don't really hold data
|
632 |
continue
|
633 |
lvs[name] = (size, inactive, online) |
634 |
|
635 |
return lvs
|
636 |
|
637 |
|
638 |
def ListVolumeGroups(): |
639 |
"""List the volume groups and their size.
|
640 |
|
641 |
@rtype: dict
|
642 |
@return: dictionary with keys volume name and values the
|
643 |
size of the volume
|
644 |
|
645 |
"""
|
646 |
return utils.ListVolumeGroups()
|
647 |
|
648 |
|
649 |
def NodeVolumes(): |
650 |
"""List all volumes on this node.
|
651 |
|
652 |
@rtype: list
|
653 |
@return:
|
654 |
A list of dictionaries, each having four keys:
|
655 |
- name: the logical volume name,
|
656 |
- size: the size of the logical volume
|
657 |
- dev: the physical device on which the LV lives
|
658 |
- vg: the volume group to which it belongs
|
659 |
|
660 |
In case of errors, we return an empty list and log the
|
661 |
error.
|
662 |
|
663 |
Note that since a logical volume can live on multiple physical
|
664 |
volumes, the resulting list might include a logical volume
|
665 |
multiple times.
|
666 |
|
667 |
"""
|
668 |
result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix", |
669 |
"--separator=|",
|
670 |
"--options=lv_name,lv_size,devices,vg_name"])
|
671 |
if result.failed:
|
672 |
_Fail("Failed to list logical volumes, lvs output: %s",
|
673 |
result.output) |
674 |
|
675 |
def parse_dev(dev): |
676 |
return dev.split('(')[0] |
677 |
|
678 |
def handle_dev(dev): |
679 |
return [parse_dev(x) for x in dev.split(",")] |
680 |
|
681 |
def map_line(line): |
682 |
line = [v.strip() for v in line] |
683 |
return [{'name': line[0], 'size': line[1], |
684 |
'dev': dev, 'vg': line[3]} for dev in handle_dev(line[2])] |
685 |
|
686 |
all_devs = [] |
687 |
for line in result.stdout.splitlines(): |
688 |
if line.count('|') >= 3: |
689 |
all_devs.extend(map_line(line.split('|')))
|
690 |
else:
|
691 |
logging.warning("Strange line in the output from lvs: '%s'", line)
|
692 |
return all_devs
|
693 |
|
694 |
|
695 |
def BridgesExist(bridges_list): |
696 |
"""Check if a list of bridges exist on the current node.
|
697 |
|
698 |
@rtype: boolean
|
699 |
@return: C{True} if all of them exist, C{False} otherwise
|
700 |
|
701 |
"""
|
702 |
missing = [] |
703 |
for bridge in bridges_list: |
704 |
if not utils.BridgeExists(bridge): |
705 |
missing.append(bridge) |
706 |
|
707 |
if missing:
|
708 |
_Fail("Missing bridges %s", utils.CommaJoin(missing))
|
709 |
|
710 |
|
711 |
def GetInstanceList(hypervisor_list): |
712 |
"""Provides a list of instances.
|
713 |
|
714 |
@type hypervisor_list: list
|
715 |
@param hypervisor_list: the list of hypervisors to query information
|
716 |
|
717 |
@rtype: list
|
718 |
@return: a list of all running instances on the current node
|
719 |
- instance1.example.com
|
720 |
- instance2.example.com
|
721 |
|
722 |
"""
|
723 |
results = [] |
724 |
for hname in hypervisor_list: |
725 |
try:
|
726 |
names = hypervisor.GetHypervisor(hname).ListInstances() |
727 |
results.extend(names) |
728 |
except errors.HypervisorError, err:
|
729 |
_Fail("Error enumerating instances (hypervisor %s): %s",
|
730 |
hname, err, exc=True)
|
731 |
|
732 |
return results
|
733 |
|
734 |
|
735 |
def GetInstanceInfo(instance, hname): |
736 |
"""Gives back the information about an instance as a dictionary.
|
737 |
|
738 |
@type instance: string
|
739 |
@param instance: the instance name
|
740 |
@type hname: string
|
741 |
@param hname: the hypervisor type of the instance
|
742 |
|
743 |
@rtype: dict
|
744 |
@return: dictionary with the following keys:
|
745 |
- memory: memory size of instance (int)
|
746 |
- state: xen state of instance (string)
|
747 |
- time: cpu time of instance (float)
|
748 |
|
749 |
"""
|
750 |
output = {} |
751 |
|
752 |
iinfo = hypervisor.GetHypervisor(hname).GetInstanceInfo(instance) |
753 |
if iinfo is not None: |
754 |
output['memory'] = iinfo[2] |
755 |
output['state'] = iinfo[4] |
756 |
output['time'] = iinfo[5] |
757 |
|
758 |
return output
|
759 |
|
760 |
|
761 |
def GetInstanceMigratable(instance): |
762 |
"""Gives whether an instance can be migrated.
|
763 |
|
764 |
@type instance: L{objects.Instance}
|
765 |
@param instance: object representing the instance to be checked.
|
766 |
|
767 |
@rtype: tuple
|
768 |
@return: tuple of (result, description) where:
|
769 |
- result: whether the instance can be migrated or not
|
770 |
- description: a description of the issue, if relevant
|
771 |
|
772 |
"""
|
773 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
774 |
iname = instance.name |
775 |
if iname not in hyper.ListInstances(): |
776 |
_Fail("Instance %s is not running", iname)
|
777 |
|
778 |
for idx in range(len(instance.disks)): |
779 |
link_name = _GetBlockDevSymlinkPath(iname, idx) |
780 |
if not os.path.islink(link_name): |
781 |
_Fail("Instance %s was not restarted since ganeti 1.2.5", iname)
|
782 |
|
783 |
|
784 |
def GetAllInstancesInfo(hypervisor_list): |
785 |
"""Gather data about all instances.
|
786 |
|
787 |
This is the equivalent of L{GetInstanceInfo}, except that it
|
788 |
computes data for all instances at once, thus being faster if one
|
789 |
needs data about more than one instance.
|
790 |
|
791 |
@type hypervisor_list: list
|
792 |
@param hypervisor_list: list of hypervisors to query for instance data
|
793 |
|
794 |
@rtype: dict
|
795 |
@return: dictionary of instance: data, with data having the following keys:
|
796 |
- memory: memory size of instance (int)
|
797 |
- state: xen state of instance (string)
|
798 |
- time: cpu time of instance (float)
|
799 |
- vcpus: the number of vcpus
|
800 |
|
801 |
"""
|
802 |
output = {} |
803 |
|
804 |
for hname in hypervisor_list: |
805 |
iinfo = hypervisor.GetHypervisor(hname).GetAllInstancesInfo() |
806 |
if iinfo:
|
807 |
for name, _, memory, vcpus, state, times in iinfo: |
808 |
value = { |
809 |
'memory': memory,
|
810 |
'vcpus': vcpus,
|
811 |
'state': state,
|
812 |
'time': times,
|
813 |
} |
814 |
if name in output: |
815 |
# we only check static parameters, like memory and vcpus,
|
816 |
# and not state and time which can change between the
|
817 |
# invocations of the different hypervisors
|
818 |
for key in 'memory', 'vcpus': |
819 |
if value[key] != output[name][key]:
|
820 |
_Fail("Instance %s is running twice"
|
821 |
" with different parameters", name)
|
822 |
output[name] = value |
823 |
|
824 |
return output
|
825 |
|
826 |
|
827 |
def _InstanceLogName(kind, os_name, instance): |
828 |
"""Compute the OS log filename for a given instance and operation.
|
829 |
|
830 |
The instance name and os name are passed in as strings since not all
|
831 |
operations have these as part of an instance object.
|
832 |
|
833 |
@type kind: string
|
834 |
@param kind: the operation type (e.g. add, import, etc.)
|
835 |
@type os_name: string
|
836 |
@param os_name: the os name
|
837 |
@type instance: string
|
838 |
@param instance: the name of the instance being imported/added/etc.
|
839 |
|
840 |
"""
|
841 |
base = ("%s-%s-%s-%s.log" %
|
842 |
(kind, os_name, instance, utils.TimestampForFilename())) |
843 |
return utils.PathJoin(constants.LOG_OS_DIR, base)
|
844 |
|
845 |
|
846 |
def InstanceOsAdd(instance, reinstall, debug): |
847 |
"""Add an OS to an instance.
|
848 |
|
849 |
@type instance: L{objects.Instance}
|
850 |
@param instance: Instance whose OS is to be installed
|
851 |
@type reinstall: boolean
|
852 |
@param reinstall: whether this is an instance reinstall
|
853 |
@type debug: integer
|
854 |
@param debug: debug level, passed to the OS scripts
|
855 |
@rtype: None
|
856 |
|
857 |
"""
|
858 |
inst_os = OSFromDisk(instance.os) |
859 |
|
860 |
create_env = OSEnvironment(instance, inst_os, debug) |
861 |
if reinstall:
|
862 |
create_env['INSTANCE_REINSTALL'] = "1" |
863 |
|
864 |
logfile = _InstanceLogName("add", instance.os, instance.name)
|
865 |
|
866 |
result = utils.RunCmd([inst_os.create_script], env=create_env, |
867 |
cwd=inst_os.path, output=logfile,) |
868 |
if result.failed:
|
869 |
logging.error("os create command '%s' returned error: %s, logfile: %s,"
|
870 |
" output: %s", result.cmd, result.fail_reason, logfile,
|
871 |
result.output) |
872 |
lines = [utils.SafeEncode(val) |
873 |
for val in utils.TailFile(logfile, lines=20)] |
874 |
_Fail("OS create script failed (%s), last lines in the"
|
875 |
" log file:\n%s", result.fail_reason, "\n".join(lines), log=False) |
876 |
|
877 |
|
878 |
def RunRenameInstance(instance, old_name, debug): |
879 |
"""Run the OS rename script for an instance.
|
880 |
|
881 |
@type instance: L{objects.Instance}
|
882 |
@param instance: Instance whose OS is to be installed
|
883 |
@type old_name: string
|
884 |
@param old_name: previous instance name
|
885 |
@type debug: integer
|
886 |
@param debug: debug level, passed to the OS scripts
|
887 |
@rtype: boolean
|
888 |
@return: the success of the operation
|
889 |
|
890 |
"""
|
891 |
inst_os = OSFromDisk(instance.os) |
892 |
|
893 |
rename_env = OSEnvironment(instance, inst_os, debug) |
894 |
rename_env['OLD_INSTANCE_NAME'] = old_name
|
895 |
|
896 |
logfile = _InstanceLogName("rename", instance.os,
|
897 |
"%s-%s" % (old_name, instance.name))
|
898 |
|
899 |
result = utils.RunCmd([inst_os.rename_script], env=rename_env, |
900 |
cwd=inst_os.path, output=logfile) |
901 |
|
902 |
if result.failed:
|
903 |
logging.error("os create command '%s' returned error: %s output: %s",
|
904 |
result.cmd, result.fail_reason, result.output) |
905 |
lines = [utils.SafeEncode(val) |
906 |
for val in utils.TailFile(logfile, lines=20)] |
907 |
_Fail("OS rename script failed (%s), last lines in the"
|
908 |
" log file:\n%s", result.fail_reason, "\n".join(lines), log=False) |
909 |
|
910 |
|
911 |
def _GetVGInfo(vg_name): |
912 |
"""Get information about the volume group.
|
913 |
|
914 |
@type vg_name: str
|
915 |
@param vg_name: the volume group which we query
|
916 |
@rtype: dict
|
917 |
@return:
|
918 |
A dictionary with the following keys:
|
919 |
- C{vg_size} is the total size of the volume group in MiB
|
920 |
- C{vg_free} is the free size of the volume group in MiB
|
921 |
- C{pv_count} are the number of physical disks in that VG
|
922 |
|
923 |
If an error occurs during gathering of data, we return the same dict
|
924 |
with keys all set to None.
|
925 |
|
926 |
"""
|
927 |
retdic = dict.fromkeys(["vg_size", "vg_free", "pv_count"]) |
928 |
|
929 |
retval = utils.RunCmd(["vgs", "-ovg_size,vg_free,pv_count", "--noheadings", |
930 |
"--nosuffix", "--units=m", "--separator=:", vg_name]) |
931 |
|
932 |
if retval.failed:
|
933 |
logging.error("volume group %s not present", vg_name)
|
934 |
return retdic
|
935 |
valarr = retval.stdout.strip().rstrip(':').split(':') |
936 |
if len(valarr) == 3: |
937 |
try:
|
938 |
retdic = { |
939 |
"vg_size": int(round(float(valarr[0]), 0)), |
940 |
"vg_free": int(round(float(valarr[1]), 0)), |
941 |
"pv_count": int(valarr[2]), |
942 |
} |
943 |
except (TypeError, ValueError), err: |
944 |
logging.exception("Fail to parse vgs output: %s", err)
|
945 |
else:
|
946 |
logging.error("vgs output has the wrong number of fields (expected"
|
947 |
" three): %s", str(valarr)) |
948 |
return retdic
|
949 |
|
950 |
|
951 |
def _GetBlockDevSymlinkPath(instance_name, idx): |
952 |
return utils.PathJoin(constants.DISK_LINKS_DIR,
|
953 |
"%s:%d" % (instance_name, idx))
|
954 |
|
955 |
|
956 |
def _SymlinkBlockDev(instance_name, device_path, idx): |
957 |
"""Set up symlinks to a instance's block device.
|
958 |
|
959 |
This is an auxiliary function run when an instance is start (on the primary
|
960 |
node) or when an instance is migrated (on the target node).
|
961 |
|
962 |
|
963 |
@param instance_name: the name of the target instance
|
964 |
@param device_path: path of the physical block device, on the node
|
965 |
@param idx: the disk index
|
966 |
@return: absolute path to the disk's symlink
|
967 |
|
968 |
"""
|
969 |
link_name = _GetBlockDevSymlinkPath(instance_name, idx) |
970 |
try:
|
971 |
os.symlink(device_path, link_name) |
972 |
except OSError, err: |
973 |
if err.errno == errno.EEXIST:
|
974 |
if (not os.path.islink(link_name) or |
975 |
os.readlink(link_name) != device_path): |
976 |
os.remove(link_name) |
977 |
os.symlink(device_path, link_name) |
978 |
else:
|
979 |
raise
|
980 |
|
981 |
return link_name
|
982 |
|
983 |
|
984 |
def _RemoveBlockDevLinks(instance_name, disks): |
985 |
"""Remove the block device symlinks belonging to the given instance.
|
986 |
|
987 |
"""
|
988 |
for idx, _ in enumerate(disks): |
989 |
link_name = _GetBlockDevSymlinkPath(instance_name, idx) |
990 |
if os.path.islink(link_name):
|
991 |
try:
|
992 |
os.remove(link_name) |
993 |
except OSError: |
994 |
logging.exception("Can't remove symlink '%s'", link_name)
|
995 |
|
996 |
|
997 |
def _GatherAndLinkBlockDevs(instance): |
998 |
"""Set up an instance's block device(s).
|
999 |
|
1000 |
This is run on the primary node at instance startup. The block
|
1001 |
devices must be already assembled.
|
1002 |
|
1003 |
@type instance: L{objects.Instance}
|
1004 |
@param instance: the instance whose disks we shoul assemble
|
1005 |
@rtype: list
|
1006 |
@return: list of (disk_object, device_path)
|
1007 |
|
1008 |
"""
|
1009 |
block_devices = [] |
1010 |
for idx, disk in enumerate(instance.disks): |
1011 |
device = _RecursiveFindBD(disk) |
1012 |
if device is None: |
1013 |
raise errors.BlockDeviceError("Block device '%s' is not set up." % |
1014 |
str(disk))
|
1015 |
device.Open() |
1016 |
try:
|
1017 |
link_name = _SymlinkBlockDev(instance.name, device.dev_path, idx) |
1018 |
except OSError, e: |
1019 |
raise errors.BlockDeviceError("Cannot create block device symlink: %s" % |
1020 |
e.strerror) |
1021 |
|
1022 |
block_devices.append((disk, link_name)) |
1023 |
|
1024 |
return block_devices
|
1025 |
|
1026 |
|
1027 |
def StartInstance(instance): |
1028 |
"""Start an instance.
|
1029 |
|
1030 |
@type instance: L{objects.Instance}
|
1031 |
@param instance: the instance object
|
1032 |
@rtype: None
|
1033 |
|
1034 |
"""
|
1035 |
running_instances = GetInstanceList([instance.hypervisor]) |
1036 |
|
1037 |
if instance.name in running_instances: |
1038 |
logging.info("Instance %s already running, not starting", instance.name)
|
1039 |
return
|
1040 |
|
1041 |
try:
|
1042 |
block_devices = _GatherAndLinkBlockDevs(instance) |
1043 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1044 |
hyper.StartInstance(instance, block_devices) |
1045 |
except errors.BlockDeviceError, err:
|
1046 |
_Fail("Block device error: %s", err, exc=True) |
1047 |
except errors.HypervisorError, err:
|
1048 |
_RemoveBlockDevLinks(instance.name, instance.disks) |
1049 |
_Fail("Hypervisor error: %s", err, exc=True) |
1050 |
|
1051 |
|
1052 |
def InstanceShutdown(instance, timeout): |
1053 |
"""Shut an instance down.
|
1054 |
|
1055 |
@note: this functions uses polling with a hardcoded timeout.
|
1056 |
|
1057 |
@type instance: L{objects.Instance}
|
1058 |
@param instance: the instance object
|
1059 |
@type timeout: integer
|
1060 |
@param timeout: maximum timeout for soft shutdown
|
1061 |
@rtype: None
|
1062 |
|
1063 |
"""
|
1064 |
hv_name = instance.hypervisor |
1065 |
hyper = hypervisor.GetHypervisor(hv_name) |
1066 |
iname = instance.name |
1067 |
|
1068 |
if instance.name not in hyper.ListInstances(): |
1069 |
logging.info("Instance %s not running, doing nothing", iname)
|
1070 |
return
|
1071 |
|
1072 |
class _TryShutdown: |
1073 |
def __init__(self): |
1074 |
self.tried_once = False |
1075 |
|
1076 |
def __call__(self): |
1077 |
if iname not in hyper.ListInstances(): |
1078 |
return
|
1079 |
|
1080 |
try:
|
1081 |
hyper.StopInstance(instance, retry=self.tried_once)
|
1082 |
except errors.HypervisorError, err:
|
1083 |
if iname not in hyper.ListInstances(): |
1084 |
# if the instance is no longer existing, consider this a
|
1085 |
# success and go to cleanup
|
1086 |
return
|
1087 |
|
1088 |
_Fail("Failed to stop instance %s: %s", iname, err)
|
1089 |
|
1090 |
self.tried_once = True |
1091 |
|
1092 |
raise utils.RetryAgain()
|
1093 |
|
1094 |
try:
|
1095 |
utils.Retry(_TryShutdown(), 5, timeout)
|
1096 |
except utils.RetryTimeout:
|
1097 |
# the shutdown did not succeed
|
1098 |
logging.error("Shutdown of '%s' unsuccessful, forcing", iname)
|
1099 |
|
1100 |
try:
|
1101 |
hyper.StopInstance(instance, force=True)
|
1102 |
except errors.HypervisorError, err:
|
1103 |
if iname in hyper.ListInstances(): |
1104 |
# only raise an error if the instance still exists, otherwise
|
1105 |
# the error could simply be "instance ... unknown"!
|
1106 |
_Fail("Failed to force stop instance %s: %s", iname, err)
|
1107 |
|
1108 |
time.sleep(1)
|
1109 |
|
1110 |
if iname in hyper.ListInstances(): |
1111 |
_Fail("Could not shutdown instance %s even by destroy", iname)
|
1112 |
|
1113 |
try:
|
1114 |
hyper.CleanupInstance(instance.name) |
1115 |
except errors.HypervisorError, err:
|
1116 |
logging.warning("Failed to execute post-shutdown cleanup step: %s", err)
|
1117 |
|
1118 |
_RemoveBlockDevLinks(iname, instance.disks) |
1119 |
|
1120 |
|
1121 |
def InstanceReboot(instance, reboot_type, shutdown_timeout): |
1122 |
"""Reboot an instance.
|
1123 |
|
1124 |
@type instance: L{objects.Instance}
|
1125 |
@param instance: the instance object to reboot
|
1126 |
@type reboot_type: str
|
1127 |
@param reboot_type: the type of reboot, one the following
|
1128 |
constants:
|
1129 |
- L{constants.INSTANCE_REBOOT_SOFT}: only reboot the
|
1130 |
instance OS, do not recreate the VM
|
1131 |
- L{constants.INSTANCE_REBOOT_HARD}: tear down and
|
1132 |
restart the VM (at the hypervisor level)
|
1133 |
- the other reboot type (L{constants.INSTANCE_REBOOT_FULL}) is
|
1134 |
not accepted here, since that mode is handled differently, in
|
1135 |
cmdlib, and translates into full stop and start of the
|
1136 |
instance (instead of a call_instance_reboot RPC)
|
1137 |
@type shutdown_timeout: integer
|
1138 |
@param shutdown_timeout: maximum timeout for soft shutdown
|
1139 |
@rtype: None
|
1140 |
|
1141 |
"""
|
1142 |
running_instances = GetInstanceList([instance.hypervisor]) |
1143 |
|
1144 |
if instance.name not in running_instances: |
1145 |
_Fail("Cannot reboot instance %s that is not running", instance.name)
|
1146 |
|
1147 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1148 |
if reboot_type == constants.INSTANCE_REBOOT_SOFT:
|
1149 |
try:
|
1150 |
hyper.RebootInstance(instance) |
1151 |
except errors.HypervisorError, err:
|
1152 |
_Fail("Failed to soft reboot instance %s: %s", instance.name, err)
|
1153 |
elif reboot_type == constants.INSTANCE_REBOOT_HARD:
|
1154 |
try:
|
1155 |
InstanceShutdown(instance, shutdown_timeout) |
1156 |
return StartInstance(instance)
|
1157 |
except errors.HypervisorError, err:
|
1158 |
_Fail("Failed to hard reboot instance %s: %s", instance.name, err)
|
1159 |
else:
|
1160 |
_Fail("Invalid reboot_type received: %s", reboot_type)
|
1161 |
|
1162 |
|
1163 |
def MigrationInfo(instance): |
1164 |
"""Gather information about an instance to be migrated.
|
1165 |
|
1166 |
@type instance: L{objects.Instance}
|
1167 |
@param instance: the instance definition
|
1168 |
|
1169 |
"""
|
1170 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1171 |
try:
|
1172 |
info = hyper.MigrationInfo(instance) |
1173 |
except errors.HypervisorError, err:
|
1174 |
_Fail("Failed to fetch migration information: %s", err, exc=True) |
1175 |
return info
|
1176 |
|
1177 |
|
1178 |
def AcceptInstance(instance, info, target): |
1179 |
"""Prepare the node to accept an instance.
|
1180 |
|
1181 |
@type instance: L{objects.Instance}
|
1182 |
@param instance: the instance definition
|
1183 |
@type info: string/data (opaque)
|
1184 |
@param info: migration information, from the source node
|
1185 |
@type target: string
|
1186 |
@param target: target host (usually ip), on this node
|
1187 |
|
1188 |
"""
|
1189 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1190 |
try:
|
1191 |
hyper.AcceptInstance(instance, info, target) |
1192 |
except errors.HypervisorError, err:
|
1193 |
_Fail("Failed to accept instance: %s", err, exc=True) |
1194 |
|
1195 |
|
1196 |
def FinalizeMigration(instance, info, success): |
1197 |
"""Finalize any preparation to accept an instance.
|
1198 |
|
1199 |
@type instance: L{objects.Instance}
|
1200 |
@param instance: the instance definition
|
1201 |
@type info: string/data (opaque)
|
1202 |
@param info: migration information, from the source node
|
1203 |
@type success: boolean
|
1204 |
@param success: whether the migration was a success or a failure
|
1205 |
|
1206 |
"""
|
1207 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1208 |
try:
|
1209 |
hyper.FinalizeMigration(instance, info, success) |
1210 |
except errors.HypervisorError, err:
|
1211 |
_Fail("Failed to finalize migration: %s", err, exc=True) |
1212 |
|
1213 |
|
1214 |
def MigrateInstance(instance, target, live): |
1215 |
"""Migrates an instance to another node.
|
1216 |
|
1217 |
@type instance: L{objects.Instance}
|
1218 |
@param instance: the instance definition
|
1219 |
@type target: string
|
1220 |
@param target: the target node name
|
1221 |
@type live: boolean
|
1222 |
@param live: whether the migration should be done live or not (the
|
1223 |
interpretation of this parameter is left to the hypervisor)
|
1224 |
@rtype: tuple
|
1225 |
@return: a tuple of (success, msg) where:
|
1226 |
- succes is a boolean denoting the success/failure of the operation
|
1227 |
- msg is a string with details in case of failure
|
1228 |
|
1229 |
"""
|
1230 |
hyper = hypervisor.GetHypervisor(instance.hypervisor) |
1231 |
|
1232 |
try:
|
1233 |
hyper.MigrateInstance(instance, target, live) |
1234 |
except errors.HypervisorError, err:
|
1235 |
_Fail("Failed to migrate instance: %s", err, exc=True) |
1236 |
|
1237 |
|
1238 |
def BlockdevCreate(disk, size, owner, on_primary, info): |
1239 |
"""Creates a block device for an instance.
|
1240 |
|
1241 |
@type disk: L{objects.Disk}
|
1242 |
@param disk: the object describing the disk we should create
|
1243 |
@type size: int
|
1244 |
@param size: the size of the physical underlying device, in MiB
|
1245 |
@type owner: str
|
1246 |
@param owner: the name of the instance for which disk is created,
|
1247 |
used for device cache data
|
1248 |
@type on_primary: boolean
|
1249 |
@param on_primary: indicates if it is the primary node or not
|
1250 |
@type info: string
|
1251 |
@param info: string that will be sent to the physical device
|
1252 |
creation, used for example to set (LVM) tags on LVs
|
1253 |
|
1254 |
@return: the new unique_id of the device (this can sometime be
|
1255 |
computed only after creation), or None. On secondary nodes,
|
1256 |
it's not required to return anything.
|
1257 |
|
1258 |
"""
|
1259 |
# TODO: remove the obsolete 'size' argument
|
1260 |
# pylint: disable-msg=W0613
|
1261 |
clist = [] |
1262 |
if disk.children:
|
1263 |
for child in disk.children: |
1264 |
try:
|
1265 |
crdev = _RecursiveAssembleBD(child, owner, on_primary) |
1266 |
except errors.BlockDeviceError, err:
|
1267 |
_Fail("Can't assemble device %s: %s", child, err)
|
1268 |
if on_primary or disk.AssembleOnSecondary(): |
1269 |
# we need the children open in case the device itself has to
|
1270 |
# be assembled
|
1271 |
try:
|
1272 |
# pylint: disable-msg=E1103
|
1273 |
crdev.Open() |
1274 |
except errors.BlockDeviceError, err:
|
1275 |
_Fail("Can't make child '%s' read-write: %s", child, err)
|
1276 |
clist.append(crdev) |
1277 |
|
1278 |
try:
|
1279 |
device = bdev.Create(disk.dev_type, disk.physical_id, clist, disk.size) |
1280 |
except errors.BlockDeviceError, err:
|
1281 |
_Fail("Can't create block device: %s", err)
|
1282 |
|
1283 |
if on_primary or disk.AssembleOnSecondary(): |
1284 |
try:
|
1285 |
device.Assemble() |
1286 |
except errors.BlockDeviceError, err:
|
1287 |
_Fail("Can't assemble device after creation, unusual event: %s", err)
|
1288 |
device.SetSyncSpeed(constants.SYNC_SPEED) |
1289 |
if on_primary or disk.OpenOnSecondary(): |
1290 |
try:
|
1291 |
device.Open(force=True)
|
1292 |
except errors.BlockDeviceError, err:
|
1293 |
_Fail("Can't make device r/w after creation, unusual event: %s", err)
|
1294 |
DevCacheManager.UpdateCache(device.dev_path, owner, |
1295 |
on_primary, disk.iv_name) |
1296 |
|
1297 |
device.SetInfo(info) |
1298 |
|
1299 |
return device.unique_id
|
1300 |
|
1301 |
|
1302 |
def BlockdevRemove(disk): |
1303 |
"""Remove a block device.
|
1304 |
|
1305 |
@note: This is intended to be called recursively.
|
1306 |
|
1307 |
@type disk: L{objects.Disk}
|
1308 |
@param disk: the disk object we should remove
|
1309 |
@rtype: boolean
|
1310 |
@return: the success of the operation
|
1311 |
|
1312 |
"""
|
1313 |
msgs = [] |
1314 |
try:
|
1315 |
rdev = _RecursiveFindBD(disk) |
1316 |
except errors.BlockDeviceError, err:
|
1317 |
# probably can't attach
|
1318 |
logging.info("Can't attach to device %s in remove", disk)
|
1319 |
rdev = None
|
1320 |
if rdev is not None: |
1321 |
r_path = rdev.dev_path |
1322 |
try:
|
1323 |
rdev.Remove() |
1324 |
except errors.BlockDeviceError, err:
|
1325 |
msgs.append(str(err))
|
1326 |
if not msgs: |
1327 |
DevCacheManager.RemoveCache(r_path) |
1328 |
|
1329 |
if disk.children:
|
1330 |
for child in disk.children: |
1331 |
try:
|
1332 |
BlockdevRemove(child) |
1333 |
except RPCFail, err:
|
1334 |
msgs.append(str(err))
|
1335 |
|
1336 |
if msgs:
|
1337 |
_Fail("; ".join(msgs))
|
1338 |
|
1339 |
|
1340 |
def _RecursiveAssembleBD(disk, owner, as_primary): |
1341 |
"""Activate a block device for an instance.
|
1342 |
|
1343 |
This is run on the primary and secondary nodes for an instance.
|
1344 |
|
1345 |
@note: this function is called recursively.
|
1346 |
|
1347 |
@type disk: L{objects.Disk}
|
1348 |
@param disk: the disk we try to assemble
|
1349 |
@type owner: str
|
1350 |
@param owner: the name of the instance which owns the disk
|
1351 |
@type as_primary: boolean
|
1352 |
@param as_primary: if we should make the block device
|
1353 |
read/write
|
1354 |
|
1355 |
@return: the assembled device or None (in case no device
|
1356 |
was assembled)
|
1357 |
@raise errors.BlockDeviceError: in case there is an error
|
1358 |
during the activation of the children or the device
|
1359 |
itself
|
1360 |
|
1361 |
"""
|
1362 |
children = [] |
1363 |
if disk.children:
|
1364 |
mcn = disk.ChildrenNeeded() |
1365 |
if mcn == -1: |
1366 |
mcn = 0 # max number of Nones allowed |
1367 |
else:
|
1368 |
mcn = len(disk.children) - mcn # max number of Nones |
1369 |
for chld_disk in disk.children: |
1370 |
try:
|
1371 |
cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary) |
1372 |
except errors.BlockDeviceError, err:
|
1373 |
if children.count(None) >= mcn: |
1374 |
raise
|
1375 |
cdev = None
|
1376 |
logging.error("Error in child activation (but continuing): %s",
|
1377 |
str(err))
|
1378 |
children.append(cdev) |
1379 |
|
1380 |
if as_primary or disk.AssembleOnSecondary(): |
1381 |
r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children, disk.size) |
1382 |
r_dev.SetSyncSpeed(constants.SYNC_SPEED) |
1383 |
result = r_dev |
1384 |
if as_primary or disk.OpenOnSecondary(): |
1385 |
r_dev.Open() |
1386 |
DevCacheManager.UpdateCache(r_dev.dev_path, owner, |
1387 |
as_primary, disk.iv_name) |
1388 |
|
1389 |
else:
|
1390 |
result = True
|
1391 |
return result
|
1392 |
|
1393 |
|
1394 |
def BlockdevAssemble(disk, owner, as_primary): |
1395 |
"""Activate a block device for an instance.
|
1396 |
|
1397 |
This is a wrapper over _RecursiveAssembleBD.
|
1398 |
|
1399 |
@rtype: str or boolean
|
1400 |
@return: a C{/dev/...} path for primary nodes, and
|
1401 |
C{True} for secondary nodes
|
1402 |
|
1403 |
"""
|
1404 |
try:
|
1405 |
result = _RecursiveAssembleBD(disk, owner, as_primary) |
1406 |
if isinstance(result, bdev.BlockDev): |
1407 |
# pylint: disable-msg=E1103
|
1408 |
result = result.dev_path |
1409 |
except errors.BlockDeviceError, err:
|
1410 |
_Fail("Error while assembling disk: %s", err, exc=True) |
1411 |
|
1412 |
return result
|
1413 |
|
1414 |
|
1415 |
def BlockdevShutdown(disk): |
1416 |
"""Shut down a block device.
|
1417 |
|
1418 |
First, if the device is assembled (Attach() is successful), then
|
1419 |
the device is shutdown. Then the children of the device are
|
1420 |
shutdown.
|
1421 |
|
1422 |
This function is called recursively. Note that we don't cache the
|
1423 |
children or such, as oppossed to assemble, shutdown of different
|
1424 |
devices doesn't require that the upper device was active.
|
1425 |
|
1426 |
@type disk: L{objects.Disk}
|
1427 |
@param disk: the description of the disk we should
|
1428 |
shutdown
|
1429 |
@rtype: None
|
1430 |
|
1431 |
"""
|
1432 |
msgs = [] |
1433 |
r_dev = _RecursiveFindBD(disk) |
1434 |
if r_dev is not None: |
1435 |
r_path = r_dev.dev_path |
1436 |
try:
|
1437 |
r_dev.Shutdown() |
1438 |
DevCacheManager.RemoveCache(r_path) |
1439 |
except errors.BlockDeviceError, err:
|
1440 |
msgs.append(str(err))
|
1441 |
|
1442 |
if disk.children:
|
1443 |
for child in disk.children: |
1444 |
try:
|
1445 |
BlockdevShutdown(child) |
1446 |
except RPCFail, err:
|
1447 |
msgs.append(str(err))
|
1448 |
|
1449 |
if msgs:
|
1450 |
_Fail("; ".join(msgs))
|
1451 |
|
1452 |
|
1453 |
def BlockdevAddchildren(parent_cdev, new_cdevs): |
1454 |
"""Extend a mirrored block device.
|
1455 |
|
1456 |
@type parent_cdev: L{objects.Disk}
|
1457 |
@param parent_cdev: the disk to which we should add children
|
1458 |
@type new_cdevs: list of L{objects.Disk}
|
1459 |
@param new_cdevs: the list of children which we should add
|
1460 |
@rtype: None
|
1461 |
|
1462 |
"""
|
1463 |
parent_bdev = _RecursiveFindBD(parent_cdev) |
1464 |
if parent_bdev is None: |
1465 |
_Fail("Can't find parent device '%s' in add children", parent_cdev)
|
1466 |
new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs] |
1467 |
if new_bdevs.count(None) > 0: |
1468 |
_Fail("Can't find new device(s) to add: %s:%s", new_bdevs, new_cdevs)
|
1469 |
parent_bdev.AddChildren(new_bdevs) |
1470 |
|
1471 |
|
1472 |
def BlockdevRemovechildren(parent_cdev, new_cdevs): |
1473 |
"""Shrink a mirrored block device.
|
1474 |
|
1475 |
@type parent_cdev: L{objects.Disk}
|
1476 |
@param parent_cdev: the disk from which we should remove children
|
1477 |
@type new_cdevs: list of L{objects.Disk}
|
1478 |
@param new_cdevs: the list of children which we should remove
|
1479 |
@rtype: None
|
1480 |
|
1481 |
"""
|
1482 |
parent_bdev = _RecursiveFindBD(parent_cdev) |
1483 |
if parent_bdev is None: |
1484 |
_Fail("Can't find parent device '%s' in remove children", parent_cdev)
|
1485 |
devs = [] |
1486 |
for disk in new_cdevs: |
1487 |
rpath = disk.StaticDevPath() |
1488 |
if rpath is None: |
1489 |
bd = _RecursiveFindBD(disk) |
1490 |
if bd is None: |
1491 |
_Fail("Can't find device %s while removing children", disk)
|
1492 |
else:
|
1493 |
devs.append(bd.dev_path) |
1494 |
else:
|
1495 |
if not utils.IsNormAbsPath(rpath): |
1496 |
_Fail("Strange path returned from StaticDevPath: '%s'", rpath)
|
1497 |
devs.append(rpath) |
1498 |
parent_bdev.RemoveChildren(devs) |
1499 |
|
1500 |
|
1501 |
def BlockdevGetmirrorstatus(disks): |
1502 |
"""Get the mirroring status of a list of devices.
|
1503 |
|
1504 |
@type disks: list of L{objects.Disk}
|
1505 |
@param disks: the list of disks which we should query
|
1506 |
@rtype: disk
|
1507 |
@return:
|
1508 |
a list of (mirror_done, estimated_time) tuples, which
|
1509 |
are the result of L{bdev.BlockDev.CombinedSyncStatus}
|
1510 |
@raise errors.BlockDeviceError: if any of the disks cannot be
|
1511 |
found
|
1512 |
|
1513 |
"""
|
1514 |
stats = [] |
1515 |
for dsk in disks: |
1516 |
rbd = _RecursiveFindBD(dsk) |
1517 |
if rbd is None: |
1518 |
_Fail("Can't find device %s", dsk)
|
1519 |
|
1520 |
stats.append(rbd.CombinedSyncStatus()) |
1521 |
|
1522 |
return stats
|
1523 |
|
1524 |
|
1525 |
def _RecursiveFindBD(disk): |
1526 |
"""Check if a device is activated.
|
1527 |
|
1528 |
If so, return information about the real device.
|
1529 |
|
1530 |
@type disk: L{objects.Disk}
|
1531 |
@param disk: the disk object we need to find
|
1532 |
|
1533 |
@return: None if the device can't be found,
|
1534 |
otherwise the device instance
|
1535 |
|
1536 |
"""
|
1537 |
children = [] |
1538 |
if disk.children:
|
1539 |
for chdisk in disk.children: |
1540 |
children.append(_RecursiveFindBD(chdisk)) |
1541 |
|
1542 |
return bdev.FindDevice(disk.dev_type, disk.physical_id, children, disk.size)
|
1543 |
|
1544 |
|
1545 |
def _OpenRealBD(disk): |
1546 |
"""Opens the underlying block device of a disk.
|
1547 |
|
1548 |
@type disk: L{objects.Disk}
|
1549 |
@param disk: the disk object we want to open
|
1550 |
|
1551 |
"""
|
1552 |
real_disk = _RecursiveFindBD(disk) |
1553 |
if real_disk is None: |
1554 |
_Fail("Block device '%s' is not set up", disk)
|
1555 |
|
1556 |
real_disk.Open() |
1557 |
|
1558 |
return real_disk
|
1559 |
|
1560 |
|
1561 |
def BlockdevFind(disk): |
1562 |
"""Check if a device is activated.
|
1563 |
|
1564 |
If it is, return information about the real device.
|
1565 |
|
1566 |
@type disk: L{objects.Disk}
|
1567 |
@param disk: the disk to find
|
1568 |
@rtype: None or objects.BlockDevStatus
|
1569 |
@return: None if the disk cannot be found, otherwise a the current
|
1570 |
information
|
1571 |
|
1572 |
"""
|
1573 |
try:
|
1574 |
rbd = _RecursiveFindBD(disk) |
1575 |
except errors.BlockDeviceError, err:
|
1576 |
_Fail("Failed to find device: %s", err, exc=True) |
1577 |
|
1578 |
if rbd is None: |
1579 |
return None |
1580 |
|
1581 |
return rbd.GetSyncStatus()
|
1582 |
|
1583 |
|
1584 |
def BlockdevGetsize(disks): |
1585 |
"""Computes the size of the given disks.
|
1586 |
|
1587 |
If a disk is not found, returns None instead.
|
1588 |
|
1589 |
@type disks: list of L{objects.Disk}
|
1590 |
@param disks: the list of disk to compute the size for
|
1591 |
@rtype: list
|
1592 |
@return: list with elements None if the disk cannot be found,
|
1593 |
otherwise the size
|
1594 |
|
1595 |
"""
|
1596 |
result = [] |
1597 |
for cf in disks: |
1598 |
try:
|
1599 |
rbd = _RecursiveFindBD(cf) |
1600 |
except errors.BlockDeviceError:
|
1601 |
result.append(None)
|
1602 |
continue
|
1603 |
if rbd is None: |
1604 |
result.append(None)
|
1605 |
else:
|
1606 |
result.append(rbd.GetActualSize()) |
1607 |
return result
|
1608 |
|
1609 |
|
1610 |
def BlockdevExport(disk, dest_node, dest_path, cluster_name): |
1611 |
"""Export a block device to a remote node.
|
1612 |
|
1613 |
@type disk: L{objects.Disk}
|
1614 |
@param disk: the description of the disk to export
|
1615 |
@type dest_node: str
|
1616 |
@param dest_node: the destination node to export to
|
1617 |
@type dest_path: str
|
1618 |
@param dest_path: the destination path on the target node
|
1619 |
@type cluster_name: str
|
1620 |
@param cluster_name: the cluster name, needed for SSH hostalias
|
1621 |
@rtype: None
|
1622 |
|
1623 |
"""
|
1624 |
real_disk = _OpenRealBD(disk) |
1625 |
|
1626 |
# the block size on the read dd is 1MiB to match our units
|
1627 |
expcmd = utils.BuildShellCmd("set -e; set -o pipefail; "
|
1628 |
"dd if=%s bs=1048576 count=%s",
|
1629 |
real_disk.dev_path, str(disk.size))
|
1630 |
|
1631 |
# we set here a smaller block size as, due to ssh buffering, more
|
1632 |
# than 64-128k will mostly ignored; we use nocreat to fail if the
|
1633 |
# device is not already there or we pass a wrong path; we use
|
1634 |
# notrunc to no attempt truncate on an LV device; we use oflag=dsync
|
1635 |
# to not buffer too much memory; this means that at best, we flush
|
1636 |
# every 64k, which will not be very fast
|
1637 |
destcmd = utils.BuildShellCmd("dd of=%s conv=nocreat,notrunc bs=65536"
|
1638 |
" oflag=dsync", dest_path)
|
1639 |
|
1640 |
remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node, |
1641 |
constants.GANETI_RUNAS, |
1642 |
destcmd) |
1643 |
|
1644 |
# all commands have been checked, so we're safe to combine them
|
1645 |
command = '|'.join([expcmd, utils.ShellQuoteArgs(remotecmd)])
|
1646 |
|
1647 |
result = utils.RunCmd(["bash", "-c", command]) |
1648 |
|
1649 |
if result.failed:
|
1650 |
_Fail("Disk copy command '%s' returned error: %s"
|
1651 |
" output: %s", command, result.fail_reason, result.output)
|
1652 |
|
1653 |
|
1654 |
def UploadFile(file_name, data, mode, uid, gid, atime, mtime): |
1655 |
"""Write a file to the filesystem.
|
1656 |
|
1657 |
This allows the master to overwrite(!) a file. It will only perform
|
1658 |
the operation if the file belongs to a list of configuration files.
|
1659 |
|
1660 |
@type file_name: str
|
1661 |
@param file_name: the target file name
|
1662 |
@type data: str
|
1663 |
@param data: the new contents of the file
|
1664 |
@type mode: int
|
1665 |
@param mode: the mode to give the file (can be None)
|
1666 |
@type uid: int
|
1667 |
@param uid: the owner of the file (can be -1 for default)
|
1668 |
@type gid: int
|
1669 |
@param gid: the group of the file (can be -1 for default)
|
1670 |
@type atime: float
|
1671 |
@param atime: the atime to set on the file (can be None)
|
1672 |
@type mtime: float
|
1673 |
@param mtime: the mtime to set on the file (can be None)
|
1674 |
@rtype: None
|
1675 |
|
1676 |
"""
|
1677 |
if not os.path.isabs(file_name): |
1678 |
_Fail("Filename passed to UploadFile is not absolute: '%s'", file_name)
|
1679 |
|
1680 |
if file_name not in _ALLOWED_UPLOAD_FILES: |
1681 |
_Fail("Filename passed to UploadFile not in allowed upload targets: '%s'",
|
1682 |
file_name) |
1683 |
|
1684 |
raw_data = _Decompress(data) |
1685 |
|
1686 |
utils.WriteFile(file_name, data=raw_data, mode=mode, uid=uid, gid=gid, |
1687 |
atime=atime, mtime=mtime) |
1688 |
|
1689 |
|
1690 |
def WriteSsconfFiles(values): |
1691 |
"""Update all ssconf files.
|
1692 |
|
1693 |
Wrapper around the SimpleStore.WriteFiles.
|
1694 |
|
1695 |
"""
|
1696 |
ssconf.SimpleStore().WriteFiles(values) |
1697 |
|
1698 |
|
1699 |
def _ErrnoOrStr(err): |
1700 |
"""Format an EnvironmentError exception.
|
1701 |
|
1702 |
If the L{err} argument has an errno attribute, it will be looked up
|
1703 |
and converted into a textual C{E...} description. Otherwise the
|
1704 |
string representation of the error will be returned.
|
1705 |
|
1706 |
@type err: L{EnvironmentError}
|
1707 |
@param err: the exception to format
|
1708 |
|
1709 |
"""
|
1710 |
if hasattr(err, 'errno'): |
1711 |
detail = errno.errorcode[err.errno] |
1712 |
else:
|
1713 |
detail = str(err)
|
1714 |
return detail
|
1715 |
|
1716 |
|
1717 |
def _OSOndiskAPIVersion(os_dir): |
1718 |
"""Compute and return the API version of a given OS.
|
1719 |
|
1720 |
This function will try to read the API version of the OS residing in
|
1721 |
the 'os_dir' directory.
|
1722 |
|
1723 |
@type os_dir: str
|
1724 |
@param os_dir: the directory in which we should look for the OS
|
1725 |
@rtype: tuple
|
1726 |
@return: tuple (status, data) with status denoting the validity and
|
1727 |
data holding either the vaid versions or an error message
|
1728 |
|
1729 |
"""
|
1730 |
api_file = utils.PathJoin(os_dir, constants.OS_API_FILE) |
1731 |
|
1732 |
try:
|
1733 |
st = os.stat(api_file) |
1734 |
except EnvironmentError, err: |
1735 |
return False, ("Required file '%s' not found under path %s: %s" % |
1736 |
(constants.OS_API_FILE, os_dir, _ErrnoOrStr(err))) |
1737 |
|
1738 |
if not stat.S_ISREG(stat.S_IFMT(st.st_mode)): |
1739 |
return False, ("File '%s' in %s is not a regular file" % |
1740 |
(constants.OS_API_FILE, os_dir)) |
1741 |
|
1742 |
try:
|
1743 |
api_versions = utils.ReadFile(api_file).splitlines() |
1744 |
except EnvironmentError, err: |
1745 |
return False, ("Error while reading the API version file at %s: %s" % |
1746 |
(api_file, _ErrnoOrStr(err))) |
1747 |
|
1748 |
try:
|
1749 |
api_versions = [int(version.strip()) for version in api_versions] |
1750 |
except (TypeError, ValueError), err: |
1751 |
return False, ("API version(s) can't be converted to integer: %s" % |
1752 |
str(err))
|
1753 |
|
1754 |
return True, api_versions |
1755 |
|
1756 |
|
1757 |
def DiagnoseOS(top_dirs=None): |
1758 |
"""Compute the validity for all OSes.
|
1759 |
|
1760 |
@type top_dirs: list
|
1761 |
@param top_dirs: the list of directories in which to
|
1762 |
search (if not given defaults to
|
1763 |
L{constants.OS_SEARCH_PATH})
|
1764 |
@rtype: list of L{objects.OS}
|
1765 |
@return: a list of tuples (name, path, status, diagnose, variants)
|
1766 |
for all (potential) OSes under all search paths, where:
|
1767 |
- name is the (potential) OS name
|
1768 |
- path is the full path to the OS
|
1769 |
- status True/False is the validity of the OS
|
1770 |
- diagnose is the error message for an invalid OS, otherwise empty
|
1771 |
- variants is a list of supported OS variants, if any
|
1772 |
|
1773 |
"""
|
1774 |
if top_dirs is None: |
1775 |
top_dirs = constants.OS_SEARCH_PATH |
1776 |
|
1777 |
result = [] |
1778 |
for dir_name in top_dirs: |
1779 |
if os.path.isdir(dir_name):
|
1780 |
try:
|
1781 |
f_names = utils.ListVisibleFiles(dir_name) |
1782 |
except EnvironmentError, err: |
1783 |
logging.exception("Can't list the OS directory %s: %s", dir_name, err)
|
1784 |
break
|
1785 |
for name in f_names: |
1786 |
os_path = utils.PathJoin(dir_name, name) |
1787 |
status, os_inst = _TryOSFromDisk(name, base_dir=dir_name) |
1788 |
if status:
|
1789 |
diagnose = ""
|
1790 |
variants = os_inst.supported_variants |
1791 |
else:
|
1792 |
diagnose = os_inst |
1793 |
variants = [] |
1794 |
result.append((name, os_path, status, diagnose, variants)) |
1795 |
|
1796 |
return result
|
1797 |
|
1798 |
|
1799 |
def _TryOSFromDisk(name, base_dir=None): |
1800 |
"""Create an OS instance from disk.
|
1801 |
|
1802 |
This function will return an OS instance if the given name is a
|
1803 |
valid OS name.
|
1804 |
|
1805 |
@type base_dir: string
|
1806 |
@keyword base_dir: Base directory containing OS installations.
|
1807 |
Defaults to a search in all the OS_SEARCH_PATH dirs.
|
1808 |
@rtype: tuple
|
1809 |
@return: success and either the OS instance if we find a valid one,
|
1810 |
or error message
|
1811 |
|
1812 |
"""
|
1813 |
if base_dir is None: |
1814 |
os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir) |
1815 |
else:
|
1816 |
os_dir = utils.FindFile(name, [base_dir], os.path.isdir) |
1817 |
|
1818 |
if os_dir is None: |
1819 |
return False, "Directory for OS %s not found in search path" % name |
1820 |
|
1821 |
status, api_versions = _OSOndiskAPIVersion(os_dir) |
1822 |
if not status: |
1823 |
# push the error up
|
1824 |
return status, api_versions
|
1825 |
|
1826 |
if not constants.OS_API_VERSIONS.intersection(api_versions): |
1827 |
return False, ("API version mismatch for path '%s': found %s, want %s." % |
1828 |
(os_dir, api_versions, constants.OS_API_VERSIONS)) |
1829 |
|
1830 |
# OS Files dictionary, we will populate it with the absolute path names
|
1831 |
os_files = dict.fromkeys(constants.OS_SCRIPTS)
|
1832 |
|
1833 |
if max(api_versions) >= constants.OS_API_V15: |
1834 |
os_files[constants.OS_VARIANTS_FILE] = ''
|
1835 |
|
1836 |
for filename in os_files: |
1837 |
os_files[filename] = utils.PathJoin(os_dir, filename) |
1838 |
|
1839 |
try:
|
1840 |
st = os.stat(os_files[filename]) |
1841 |
except EnvironmentError, err: |
1842 |
return False, ("File '%s' under path '%s' is missing (%s)" % |
1843 |
(filename, os_dir, _ErrnoOrStr(err))) |
1844 |
|
1845 |
if not stat.S_ISREG(stat.S_IFMT(st.st_mode)): |
1846 |
return False, ("File '%s' under path '%s' is not a regular file" % |
1847 |
(filename, os_dir)) |
1848 |
|
1849 |
if filename in constants.OS_SCRIPTS: |
1850 |
if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
|
1851 |
return False, ("File '%s' under path '%s' is not executable" % |
1852 |
(filename, os_dir)) |
1853 |
|
1854 |
variants = None
|
1855 |
if constants.OS_VARIANTS_FILE in os_files: |
1856 |
variants_file = os_files[constants.OS_VARIANTS_FILE] |
1857 |
try:
|
1858 |
variants = utils.ReadFile(variants_file).splitlines() |
1859 |
except EnvironmentError, err: |
1860 |
return False, ("Error while reading the OS variants file at %s: %s" % |
1861 |
(variants_file, _ErrnoOrStr(err))) |
1862 |
if not variants: |
1863 |
return False, ("No supported os variant found") |
1864 |
|
1865 |
os_obj = objects.OS(name=name, path=os_dir, |
1866 |
create_script=os_files[constants.OS_SCRIPT_CREATE], |
1867 |
export_script=os_files[constants.OS_SCRIPT_EXPORT], |
1868 |
import_script=os_files[constants.OS_SCRIPT_IMPORT], |
1869 |
rename_script=os_files[constants.OS_SCRIPT_RENAME], |
1870 |
supported_variants=variants, |
1871 |
api_versions=api_versions) |
1872 |
return True, os_obj |
1873 |
|
1874 |
|
1875 |
def OSFromDisk(name, base_dir=None): |
1876 |
"""Create an OS instance from disk.
|
1877 |
|
1878 |
This function will return an OS instance if the given name is a
|
1879 |
valid OS name. Otherwise, it will raise an appropriate
|
1880 |
L{RPCFail} exception, detailing why this is not a valid OS.
|
1881 |
|
1882 |
This is just a wrapper over L{_TryOSFromDisk}, which doesn't raise
|
1883 |
an exception but returns true/false status data.
|
1884 |
|
1885 |
@type base_dir: string
|
1886 |
@keyword base_dir: Base directory containing OS installations.
|
1887 |
Defaults to a search in all the OS_SEARCH_PATH dirs.
|
1888 |
@rtype: L{objects.OS}
|
1889 |
@return: the OS instance if we find a valid one
|
1890 |
@raise RPCFail: if we don't find a valid OS
|
1891 |
|
1892 |
"""
|
1893 |
name_only = name.split("+", 1)[0] |
1894 |
status, payload = _TryOSFromDisk(name_only, base_dir) |
1895 |
|
1896 |
if not status: |
1897 |
_Fail(payload) |
1898 |
|
1899 |
return payload
|
1900 |
|
1901 |
|
1902 |
def OSEnvironment(instance, inst_os, debug=0): |
1903 |
"""Calculate the environment for an os script.
|
1904 |
|
1905 |
@type instance: L{objects.Instance}
|
1906 |
@param instance: target instance for the os script run
|
1907 |
@type inst_os: L{objects.OS}
|
1908 |
@param inst_os: operating system for which the environment is being built
|
1909 |
@type debug: integer
|
1910 |
@param debug: debug level (0 or 1, for OS Api 10)
|
1911 |
@rtype: dict
|
1912 |
@return: dict of environment variables
|
1913 |
@raise errors.BlockDeviceError: if the block device
|
1914 |
cannot be found
|
1915 |
|
1916 |
"""
|
1917 |
result = {} |
1918 |
api_version = \ |
1919 |
max(constants.OS_API_VERSIONS.intersection(inst_os.api_versions))
|
1920 |
result['OS_API_VERSION'] = '%d' % api_version |
1921 |
result['INSTANCE_NAME'] = instance.name
|
1922 |
result['INSTANCE_OS'] = instance.os
|
1923 |
result['HYPERVISOR'] = instance.hypervisor
|
1924 |
result['DISK_COUNT'] = '%d' % len(instance.disks) |
1925 |
result['NIC_COUNT'] = '%d' % len(instance.nics) |
1926 |
result['DEBUG_LEVEL'] = '%d' % debug |
1927 |
if api_version >= constants.OS_API_V15:
|
1928 |
try:
|
1929 |
variant = instance.os.split('+', 1)[1] |
1930 |
except IndexError: |
1931 |
variant = inst_os.supported_variants[0]
|
1932 |
result['OS_VARIANT'] = variant
|
1933 |
for idx, disk in enumerate(instance.disks): |
1934 |
real_disk = _OpenRealBD(disk) |
1935 |
result['DISK_%d_PATH' % idx] = real_disk.dev_path
|
1936 |
result['DISK_%d_ACCESS' % idx] = disk.mode
|
1937 |
if constants.HV_DISK_TYPE in instance.hvparams: |
1938 |
result['DISK_%d_FRONTEND_TYPE' % idx] = \
|
1939 |
instance.hvparams[constants.HV_DISK_TYPE] |
1940 |
if disk.dev_type in constants.LDS_BLOCK: |
1941 |
result['DISK_%d_BACKEND_TYPE' % idx] = 'block' |
1942 |
elif disk.dev_type == constants.LD_FILE:
|
1943 |
result['DISK_%d_BACKEND_TYPE' % idx] = \
|
1944 |
'file:%s' % disk.physical_id[0] |
1945 |
for idx, nic in enumerate(instance.nics): |
1946 |
result['NIC_%d_MAC' % idx] = nic.mac
|
1947 |
if nic.ip:
|
1948 |
result['NIC_%d_IP' % idx] = nic.ip
|
1949 |
result['NIC_%d_MODE' % idx] = nic.nicparams[constants.NIC_MODE]
|
1950 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
1951 |
result['NIC_%d_BRIDGE' % idx] = nic.nicparams[constants.NIC_LINK]
|
1952 |
if nic.nicparams[constants.NIC_LINK]:
|
1953 |
result['NIC_%d_LINK' % idx] = nic.nicparams[constants.NIC_LINK]
|
1954 |
if constants.HV_NIC_TYPE in instance.hvparams: |
1955 |
result['NIC_%d_FRONTEND_TYPE' % idx] = \
|
1956 |
instance.hvparams[constants.HV_NIC_TYPE] |
1957 |
|
1958 |
for source, kind in [(instance.beparams, "BE"), (instance.hvparams, "HV")]: |
1959 |
for key, value in source.items(): |
1960 |
result["INSTANCE_%s_%s" % (kind, key)] = str(value) |
1961 |
|
1962 |
return result
|
1963 |
|
1964 |
|
1965 |
def BlockdevGrow(disk, amount): |
1966 |
"""Grow a stack of block devices.
|
1967 |
|
1968 |
This function is called recursively, with the childrens being the
|
1969 |
first ones to resize.
|
1970 |
|
1971 |
@type disk: L{objects.Disk}
|
1972 |
@param disk: the disk to be grown
|
1973 |
@rtype: (status, result)
|
1974 |
@return: a tuple with the status of the operation
|
1975 |
(True/False), and the errors message if status
|
1976 |
is False
|
1977 |
|
1978 |
"""
|
1979 |
r_dev = _RecursiveFindBD(disk) |
1980 |
if r_dev is None: |
1981 |
_Fail("Cannot find block device %s", disk)
|
1982 |
|
1983 |
try:
|
1984 |
r_dev.Grow(amount) |
1985 |
except errors.BlockDeviceError, err:
|
1986 |
_Fail("Failed to grow block device: %s", err, exc=True) |
1987 |
|
1988 |
|
1989 |
def BlockdevSnapshot(disk): |
1990 |
"""Create a snapshot copy of a block device.
|
1991 |
|
1992 |
This function is called recursively, and the snapshot is actually created
|
1993 |
just for the leaf lvm backend device.
|
1994 |
|
1995 |
@type disk: L{objects.Disk}
|
1996 |
@param disk: the disk to be snapshotted
|
1997 |
@rtype: string
|
1998 |
@return: snapshot disk path
|
1999 |
|
2000 |
"""
|
2001 |
if disk.dev_type == constants.LD_DRBD8:
|
2002 |
if not disk.children: |
2003 |
_Fail("DRBD device '%s' without backing storage cannot be snapshotted",
|
2004 |
disk.unique_id) |
2005 |
return BlockdevSnapshot(disk.children[0]) |
2006 |
elif disk.dev_type == constants.LD_LV:
|
2007 |
r_dev = _RecursiveFindBD(disk) |
2008 |
if r_dev is not None: |
2009 |
# FIXME: choose a saner value for the snapshot size
|
2010 |
# let's stay on the safe side and ask for the full size, for now
|
2011 |
return r_dev.Snapshot(disk.size)
|
2012 |
else:
|
2013 |
_Fail("Cannot find block device %s", disk)
|
2014 |
else:
|
2015 |
_Fail("Cannot snapshot non-lvm block device '%s' of type '%s'",
|
2016 |
disk.unique_id, disk.dev_type) |
2017 |
|
2018 |
|
2019 |
def ExportSnapshot(disk, dest_node, instance, cluster_name, idx, debug): |
2020 |
"""Export a block device snapshot to a remote node.
|
2021 |
|
2022 |
@type disk: L{objects.Disk}
|
2023 |
@param disk: the description of the disk to export
|
2024 |
@type dest_node: str
|
2025 |
@param dest_node: the destination node to export to
|
2026 |
@type instance: L{objects.Instance}
|
2027 |
@param instance: the instance object to whom the disk belongs
|
2028 |
@type cluster_name: str
|
2029 |
@param cluster_name: the cluster name, needed for SSH hostalias
|
2030 |
@type idx: int
|
2031 |
@param idx: the index of the disk in the instance's disk list,
|
2032 |
used to export to the OS scripts environment
|
2033 |
@type debug: integer
|
2034 |
@param debug: debug level, passed to the OS scripts
|
2035 |
@rtype: None
|
2036 |
|
2037 |
"""
|
2038 |
inst_os = OSFromDisk(instance.os) |
2039 |
export_env = OSEnvironment(instance, inst_os, debug) |
2040 |
|
2041 |
export_script = inst_os.export_script |
2042 |
|
2043 |
logfile = _InstanceLogName("export", inst_os.name, instance.name)
|
2044 |
|
2045 |
real_disk = _OpenRealBD(disk) |
2046 |
|
2047 |
export_env['EXPORT_DEVICE'] = real_disk.dev_path
|
2048 |
export_env['EXPORT_INDEX'] = str(idx) |
2049 |
|
2050 |
destdir = utils.PathJoin(constants.EXPORT_DIR, instance.name + ".new")
|
2051 |
destfile = disk.physical_id[1]
|
2052 |
|
2053 |
# the target command is built out of three individual commands,
|
2054 |
# which are joined by pipes; we check each individual command for
|
2055 |
# valid parameters
|
2056 |
expcmd = utils.BuildShellCmd("set -e; set -o pipefail; cd %s; %s 2>%s",
|
2057 |
inst_os.path, export_script, logfile) |
2058 |
|
2059 |
comprcmd = "gzip"
|
2060 |
|
2061 |
destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s",
|
2062 |
destdir, utils.PathJoin(destdir, destfile)) |
2063 |
remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node, |
2064 |
constants.GANETI_RUNAS, |
2065 |
destcmd) |
2066 |
|
2067 |
# all commands have been checked, so we're safe to combine them
|
2068 |
command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
|
2069 |
|
2070 |
result = utils.RunCmd(["bash", "-c", command], env=export_env) |
2071 |
|
2072 |
if result.failed:
|
2073 |
_Fail("OS snapshot export command '%s' returned error: %s"
|
2074 |
" output: %s", command, result.fail_reason, result.output)
|
2075 |
|
2076 |
|
2077 |
def FinalizeExport(instance, snap_disks): |
2078 |
"""Write out the export configuration information.
|
2079 |
|
2080 |
@type instance: L{objects.Instance}
|
2081 |
@param instance: the instance which we export, used for
|
2082 |
saving configuration
|
2083 |
@type snap_disks: list of L{objects.Disk}
|
2084 |
@param snap_disks: list of snapshot block devices, which
|
2085 |
will be used to get the actual name of the dump file
|
2086 |
|
2087 |
@rtype: None
|
2088 |
|
2089 |
"""
|
2090 |
destdir = utils.PathJoin(constants.EXPORT_DIR, instance.name + ".new")
|
2091 |
finaldestdir = utils.PathJoin(constants.EXPORT_DIR, instance.name) |
2092 |
|
2093 |
config = objects.SerializableConfigParser() |
2094 |
|
2095 |
config.add_section(constants.INISECT_EXP) |
2096 |
config.set(constants.INISECT_EXP, 'version', '0') |
2097 |
config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time())) |
2098 |
config.set(constants.INISECT_EXP, 'source', instance.primary_node)
|
2099 |
config.set(constants.INISECT_EXP, 'os', instance.os)
|
2100 |
config.set(constants.INISECT_EXP, 'compression', 'gzip') |
2101 |
|
2102 |
config.add_section(constants.INISECT_INS) |
2103 |
config.set(constants.INISECT_INS, 'name', instance.name)
|
2104 |
config.set(constants.INISECT_INS, 'memory', '%d' % |
2105 |
instance.beparams[constants.BE_MEMORY]) |
2106 |
config.set(constants.INISECT_INS, 'vcpus', '%d' % |
2107 |
instance.beparams[constants.BE_VCPUS]) |
2108 |
config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
|
2109 |
config.set(constants.INISECT_INS, 'hypervisor', instance.hypervisor)
|
2110 |
|
2111 |
nic_total = 0
|
2112 |
for nic_count, nic in enumerate(instance.nics): |
2113 |
nic_total += 1
|
2114 |
config.set(constants.INISECT_INS, 'nic%d_mac' %
|
2115 |
nic_count, '%s' % nic.mac)
|
2116 |
config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip) |
2117 |
for param in constants.NICS_PARAMETER_TYPES: |
2118 |
config.set(constants.INISECT_INS, 'nic%d_%s' % (nic_count, param),
|
2119 |
'%s' % nic.nicparams.get(param, None)) |
2120 |
# TODO: redundant: on load can read nics until it doesn't exist
|
2121 |
config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total) |
2122 |
|
2123 |
disk_total = 0
|
2124 |
for disk_count, disk in enumerate(snap_disks): |
2125 |
if disk:
|
2126 |
disk_total += 1
|
2127 |
config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
|
2128 |
('%s' % disk.iv_name))
|
2129 |
config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
|
2130 |
('%s' % disk.physical_id[1])) |
2131 |
config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
|
2132 |
('%d' % disk.size))
|
2133 |
|
2134 |
config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total) |
2135 |
|
2136 |
# New-style hypervisor/backend parameters
|
2137 |
|
2138 |
config.add_section(constants.INISECT_HYP) |
2139 |
for name, value in instance.hvparams.items(): |
2140 |
if name not in constants.HVC_GLOBALS: |
2141 |
config.set(constants.INISECT_HYP, name, str(value))
|
2142 |
|
2143 |
config.add_section(constants.INISECT_BEP) |
2144 |
for name, value in instance.beparams.items(): |
2145 |
config.set(constants.INISECT_BEP, name, str(value))
|
2146 |
|
2147 |
utils.WriteFile(utils.PathJoin(destdir, constants.EXPORT_CONF_FILE), |
2148 |
data=config.Dumps()) |
2149 |
shutil.rmtree(finaldestdir, ignore_errors=True)
|
2150 |
shutil.move(destdir, finaldestdir) |
2151 |
|
2152 |
|
2153 |
def ExportInfo(dest): |
2154 |
"""Get export configuration information.
|
2155 |
|
2156 |
@type dest: str
|
2157 |
@param dest: directory containing the export
|
2158 |
|
2159 |
@rtype: L{objects.SerializableConfigParser}
|
2160 |
@return: a serializable config file containing the
|
2161 |
export info
|
2162 |
|
2163 |
"""
|
2164 |
cff = utils.PathJoin(dest, constants.EXPORT_CONF_FILE) |
2165 |
|
2166 |
config = objects.SerializableConfigParser() |
2167 |
config.read(cff) |
2168 |
|
2169 |
if (not config.has_section(constants.INISECT_EXP) or |
2170 |
not config.has_section(constants.INISECT_INS)):
|
2171 |
_Fail("Export info file doesn't have the required fields")
|
2172 |
|
2173 |
return config.Dumps()
|
2174 |
|
2175 |
|
2176 |
def ImportOSIntoInstance(instance, src_node, src_images, cluster_name, debug): |
2177 |
"""Import an os image into an instance.
|
2178 |
|
2179 |
@type instance: L{objects.Instance}
|
2180 |
@param instance: instance to import the disks into
|
2181 |
@type src_node: string
|
2182 |
@param src_node: source node for the disk images
|
2183 |
@type src_images: list of string
|
2184 |
@param src_images: absolute paths of the disk images
|
2185 |
@type debug: integer
|
2186 |
@param debug: debug level, passed to the OS scripts
|
2187 |
@rtype: list of boolean
|
2188 |
@return: each boolean represent the success of importing the n-th disk
|
2189 |
|
2190 |
"""
|
2191 |
inst_os = OSFromDisk(instance.os) |
2192 |
import_env = OSEnvironment(instance, inst_os, debug) |
2193 |
import_script = inst_os.import_script |
2194 |
|
2195 |
logfile = _InstanceLogName("import", instance.os, instance.name)
|
2196 |
|
2197 |
comprcmd = "gunzip"
|
2198 |
impcmd = utils.BuildShellCmd("(cd %s; %s >%s 2>&1)", inst_os.path,
|
2199 |
import_script, logfile) |
2200 |
|
2201 |
final_result = [] |
2202 |
for idx, image in enumerate(src_images): |
2203 |
if image:
|
2204 |
destcmd = utils.BuildShellCmd('cat %s', image)
|
2205 |
remotecmd = _GetSshRunner(cluster_name).BuildCmd(src_node, |
2206 |
constants.GANETI_RUNAS, |
2207 |
destcmd) |
2208 |
command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
|
2209 |
import_env['IMPORT_DEVICE'] = import_env['DISK_%d_PATH' % idx] |
2210 |
import_env['IMPORT_INDEX'] = str(idx) |
2211 |
result = utils.RunCmd(command, env=import_env) |
2212 |
if result.failed:
|
2213 |
logging.error("Disk import command '%s' returned error: %s"
|
2214 |
" output: %s", command, result.fail_reason,
|
2215 |
result.output) |
2216 |
final_result.append("error importing disk %d: %s, %s" %
|
2217 |
(idx, result.fail_reason, result.output[-100]))
|
2218 |
|
2219 |
if final_result:
|
2220 |
_Fail("; ".join(final_result), log=False) |
2221 |
|
2222 |
|
2223 |
def ListExports(): |
2224 |
"""Return a list of exports currently available on this machine.
|
2225 |
|
2226 |
@rtype: list
|
2227 |
@return: list of the exports
|
2228 |
|
2229 |
"""
|
2230 |
if os.path.isdir(constants.EXPORT_DIR):
|
2231 |
return utils.ListVisibleFiles(constants.EXPORT_DIR)
|
2232 |
else:
|
2233 |
_Fail("No exports directory")
|
2234 |
|
2235 |
|
2236 |
def RemoveExport(export): |
2237 |
"""Remove an existing export from the node.
|
2238 |
|
2239 |
@type export: str
|
2240 |
@param export: the name of the export to remove
|
2241 |
@rtype: None
|
2242 |
|
2243 |
"""
|
2244 |
target = utils.PathJoin(constants.EXPORT_DIR, export) |
2245 |
|
2246 |
try:
|
2247 |
shutil.rmtree(target) |
2248 |
except EnvironmentError, err: |
2249 |
_Fail("Error while removing the export: %s", err, exc=True) |
2250 |
|
2251 |
|
2252 |
def BlockdevRename(devlist): |
2253 |
"""Rename a list of block devices.
|
2254 |
|
2255 |
@type devlist: list of tuples
|
2256 |
@param devlist: list of tuples of the form (disk,
|
2257 |
new_logical_id, new_physical_id); disk is an
|
2258 |
L{objects.Disk} object describing the current disk,
|
2259 |
and new logical_id/physical_id is the name we
|
2260 |
rename it to
|
2261 |
@rtype: boolean
|
2262 |
@return: True if all renames succeeded, False otherwise
|
2263 |
|
2264 |
"""
|
2265 |
msgs = [] |
2266 |
result = True
|
2267 |
for disk, unique_id in devlist: |
2268 |
dev = _RecursiveFindBD(disk) |
2269 |
if dev is None: |
2270 |
msgs.append("Can't find device %s in rename" % str(disk)) |
2271 |
result = False
|
2272 |
continue
|
2273 |
try:
|
2274 |
old_rpath = dev.dev_path |
2275 |
dev.Rename(unique_id) |
2276 |
new_rpath = dev.dev_path |
2277 |
if old_rpath != new_rpath:
|
2278 |
DevCacheManager.RemoveCache(old_rpath) |
2279 |
# FIXME: we should add the new cache information here, like:
|
2280 |
# DevCacheManager.UpdateCache(new_rpath, owner, ...)
|
2281 |
# but we don't have the owner here - maybe parse from existing
|
2282 |
# cache? for now, we only lose lvm data when we rename, which
|
2283 |
# is less critical than DRBD or MD
|
2284 |
except errors.BlockDeviceError, err:
|
2285 |
msgs.append("Can't rename device '%s' to '%s': %s" %
|
2286 |
(dev, unique_id, err)) |
2287 |
logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
|
2288 |
result = False
|
2289 |
if not result: |
2290 |
_Fail("; ".join(msgs))
|
2291 |
|
2292 |
|
2293 |
def _TransformFileStorageDir(file_storage_dir): |
2294 |
"""Checks whether given file_storage_dir is valid.
|
2295 |
|
2296 |
Checks wheter the given file_storage_dir is within the cluster-wide
|
2297 |
default file_storage_dir stored in SimpleStore. Only paths under that
|
2298 |
directory are allowed.
|
2299 |
|
2300 |
@type file_storage_dir: str
|
2301 |
@param file_storage_dir: the path to check
|
2302 |
|
2303 |
@return: the normalized path if valid, None otherwise
|
2304 |
|
2305 |
"""
|
2306 |
if not constants.ENABLE_FILE_STORAGE: |
2307 |
_Fail("File storage disabled at configure time")
|
2308 |
cfg = _GetConfig() |
2309 |
file_storage_dir = os.path.normpath(file_storage_dir) |
2310 |
base_file_storage_dir = cfg.GetFileStorageDir() |
2311 |
if (os.path.commonprefix([file_storage_dir, base_file_storage_dir]) !=
|
2312 |
base_file_storage_dir): |
2313 |
_Fail("File storage directory '%s' is not under base file"
|
2314 |
" storage directory '%s'", file_storage_dir, base_file_storage_dir)
|
2315 |
return file_storage_dir
|
2316 |
|
2317 |
|
2318 |
def CreateFileStorageDir(file_storage_dir): |
2319 |
"""Create file storage directory.
|
2320 |
|
2321 |
@type file_storage_dir: str
|
2322 |
@param file_storage_dir: directory to create
|
2323 |
|
2324 |
@rtype: tuple
|
2325 |
@return: tuple with first element a boolean indicating wheter dir
|
2326 |
creation was successful or not
|
2327 |
|
2328 |
"""
|
2329 |
file_storage_dir = _TransformFileStorageDir(file_storage_dir) |
2330 |
if os.path.exists(file_storage_dir):
|
2331 |
if not os.path.isdir(file_storage_dir): |
2332 |
_Fail("Specified storage dir '%s' is not a directory",
|
2333 |
file_storage_dir) |
2334 |
else:
|
2335 |
try:
|
2336 |
os.makedirs(file_storage_dir, 0750)
|
2337 |
except OSError, err: |
2338 |
_Fail("Cannot create file storage directory '%s': %s",
|
2339 |
file_storage_dir, err, exc=True)
|
2340 |
|
2341 |
|
2342 |
def RemoveFileStorageDir(file_storage_dir): |
2343 |
"""Remove file storage directory.
|
2344 |
|
2345 |
Remove it only if it's empty. If not log an error and return.
|
2346 |
|
2347 |
@type file_storage_dir: str
|
2348 |
@param file_storage_dir: the directory we should cleanup
|
2349 |
@rtype: tuple (success,)
|
2350 |
@return: tuple of one element, C{success}, denoting
|
2351 |
whether the operation was successful
|
2352 |
|
2353 |
"""
|
2354 |
file_storage_dir = _TransformFileStorageDir(file_storage_dir) |
2355 |
if os.path.exists(file_storage_dir):
|
2356 |
if not os.path.isdir(file_storage_dir): |
2357 |
_Fail("Specified Storage directory '%s' is not a directory",
|
2358 |
file_storage_dir) |
2359 |
# deletes dir only if empty, otherwise we want to fail the rpc call
|
2360 |
try:
|
2361 |
os.rmdir(file_storage_dir) |
2362 |
except OSError, err: |
2363 |
_Fail("Cannot remove file storage directory '%s': %s",
|
2364 |
file_storage_dir, err) |
2365 |
|
2366 |
|
2367 |
def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir): |
2368 |
"""Rename the file storage directory.
|
2369 |
|
2370 |
@type old_file_storage_dir: str
|
2371 |
@param old_file_storage_dir: the current path
|
2372 |
@type new_file_storage_dir: str
|
2373 |
@param new_file_storage_dir: the name we should rename to
|
2374 |
@rtype: tuple (success,)
|
2375 |
@return: tuple of one element, C{success}, denoting
|
2376 |
whether the operation was successful
|
2377 |
|
2378 |
"""
|
2379 |
old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir) |
2380 |
new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir) |
2381 |
if not os.path.exists(new_file_storage_dir): |
2382 |
if os.path.isdir(old_file_storage_dir):
|
2383 |
try:
|
2384 |
os.rename(old_file_storage_dir, new_file_storage_dir) |
2385 |
except OSError, err: |
2386 |
_Fail("Cannot rename '%s' to '%s': %s",
|
2387 |
old_file_storage_dir, new_file_storage_dir, err) |
2388 |
else:
|
2389 |
_Fail("Specified storage dir '%s' is not a directory",
|
2390 |
old_file_storage_dir) |
2391 |
else:
|
2392 |
if os.path.exists(old_file_storage_dir):
|
2393 |
_Fail("Cannot rename '%s' to '%s': both locations exist",
|
2394 |
old_file_storage_dir, new_file_storage_dir) |
2395 |
|
2396 |
|
2397 |
def _EnsureJobQueueFile(file_name): |
2398 |
"""Checks whether the given filename is in the queue directory.
|
2399 |
|
2400 |
@type file_name: str
|
2401 |
@param file_name: the file name we should check
|
2402 |
@rtype: None
|
2403 |
@raises RPCFail: if the file is not valid
|
2404 |
|
2405 |
"""
|
2406 |
queue_dir = os.path.normpath(constants.QUEUE_DIR) |
2407 |
result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir) |
2408 |
|
2409 |
if not result: |
2410 |
_Fail("Passed job queue file '%s' does not belong to"
|
2411 |
" the queue directory '%s'", file_name, queue_dir)
|
2412 |
|
2413 |
|
2414 |
def JobQueueUpdate(file_name, content): |
2415 |
"""Updates a file in the queue directory.
|
2416 |
|
2417 |
This is just a wrapper over L{utils.WriteFile}, with proper
|
2418 |
checking.
|
2419 |
|
2420 |
@type file_name: str
|
2421 |
@param file_name: the job file name
|
2422 |
@type content: str
|
2423 |
@param content: the new job contents
|
2424 |
@rtype: boolean
|
2425 |
@return: the success of the operation
|
2426 |
|
2427 |
"""
|
2428 |
_EnsureJobQueueFile(file_name) |
2429 |
|
2430 |
# Write and replace the file atomically
|
2431 |
utils.WriteFile(file_name, data=_Decompress(content)) |
2432 |
|
2433 |
|
2434 |
def JobQueueRename(old, new): |
2435 |
"""Renames a job queue file.
|
2436 |
|
2437 |
This is just a wrapper over os.rename with proper checking.
|
2438 |
|
2439 |
@type old: str
|
2440 |
@param old: the old (actual) file name
|
2441 |
@type new: str
|
2442 |
@param new: the desired file name
|
2443 |
@rtype: tuple
|
2444 |
@return: the success of the operation and payload
|
2445 |
|
2446 |
"""
|
2447 |
_EnsureJobQueueFile(old) |
2448 |
_EnsureJobQueueFile(new) |
2449 |
|
2450 |
utils.RenameFile(old, new, mkdir=True)
|
2451 |
|
2452 |
|
2453 |
def JobQueueSetDrainFlag(drain_flag): |
2454 |
"""Set the drain flag for the queue.
|
2455 |
|
2456 |
This will set or unset the queue drain flag.
|
2457 |
|
2458 |
@type drain_flag: boolean
|
2459 |
@param drain_flag: if True, will set the drain flag, otherwise reset it.
|
2460 |
@rtype: truple
|
2461 |
@return: always True, None
|
2462 |
@warning: the function always returns True
|
2463 |
|
2464 |
"""
|
2465 |
if drain_flag:
|
2466 |
utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True) |
2467 |
else:
|
2468 |
utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE) |
2469 |
|
2470 |
|
2471 |
def BlockdevClose(instance_name, disks): |
2472 |
"""Closes the given block devices.
|
2473 |
|
2474 |
This means they will be switched to secondary mode (in case of
|
2475 |
DRBD).
|
2476 |
|
2477 |
@param instance_name: if the argument is not empty, the symlinks
|
2478 |
of this instance will be removed
|
2479 |
@type disks: list of L{objects.Disk}
|
2480 |
@param disks: the list of disks to be closed
|
2481 |
@rtype: tuple (success, message)
|
2482 |
@return: a tuple of success and message, where success
|
2483 |
indicates the succes of the operation, and message
|
2484 |
which will contain the error details in case we
|
2485 |
failed
|
2486 |
|
2487 |
"""
|
2488 |
bdevs = [] |
2489 |
for cf in disks: |
2490 |
rd = _RecursiveFindBD(cf) |
2491 |
if rd is None: |
2492 |
_Fail("Can't find device %s", cf)
|
2493 |
bdevs.append(rd) |
2494 |
|
2495 |
msg = [] |
2496 |
for rd in bdevs: |
2497 |
try:
|
2498 |
rd.Close() |
2499 |
except errors.BlockDeviceError, err:
|
2500 |
msg.append(str(err))
|
2501 |
if msg:
|
2502 |
_Fail("Can't make devices secondary: %s", ",".join(msg)) |
2503 |
else:
|
2504 |
if instance_name:
|
2505 |
_RemoveBlockDevLinks(instance_name, disks) |
2506 |
|
2507 |
|
2508 |
def ValidateHVParams(hvname, hvparams): |
2509 |
"""Validates the given hypervisor parameters.
|
2510 |
|
2511 |
@type hvname: string
|
2512 |
@param hvname: the hypervisor name
|
2513 |
@type hvparams: dict
|
2514 |
@param hvparams: the hypervisor parameters to be validated
|
2515 |
@rtype: None
|
2516 |
|
2517 |
"""
|
2518 |
try:
|
2519 |
hv_type = hypervisor.GetHypervisor(hvname) |
2520 |
hv_type.ValidateParameters(hvparams) |
2521 |
except errors.HypervisorError, err:
|
2522 |
_Fail(str(err), log=False) |
2523 |
|
2524 |
|
2525 |
def DemoteFromMC(): |
2526 |
"""Demotes the current node from master candidate role.
|
2527 |
|
2528 |
"""
|
2529 |
# try to ensure we're not the master by mistake
|
2530 |
master, myself = ssconf.GetMasterAndMyself() |
2531 |
if master == myself:
|
2532 |
_Fail("ssconf status shows I'm the master node, will not demote")
|
2533 |
|
2534 |
result = utils.RunCmd([constants.DAEMON_UTIL, "check", constants.MASTERD])
|
2535 |
if not result.failed: |
2536 |
_Fail("The master daemon is running, will not demote")
|
2537 |
|
2538 |
try:
|
2539 |
if os.path.isfile(constants.CLUSTER_CONF_FILE):
|
2540 |
utils.CreateBackup(constants.CLUSTER_CONF_FILE) |
2541 |
except EnvironmentError, err: |
2542 |
if err.errno != errno.ENOENT:
|
2543 |
_Fail("Error while backing up cluster file: %s", err, exc=True) |
2544 |
|
2545 |
utils.RemoveFile(constants.CLUSTER_CONF_FILE) |
2546 |
|
2547 |
|
2548 |
def _FindDisks(nodes_ip, disks): |
2549 |
"""Sets the physical ID on disks and returns the block devices.
|
2550 |
|
2551 |
"""
|
2552 |
# set the correct physical ID
|
2553 |
my_name = utils.HostInfo().name |
2554 |
for cf in disks: |
2555 |
cf.SetPhysicalID(my_name, nodes_ip) |
2556 |
|
2557 |
bdevs = [] |
2558 |
|
2559 |
for cf in disks: |
2560 |
rd = _RecursiveFindBD(cf) |
2561 |
if rd is None: |
2562 |
_Fail("Can't find device %s", cf)
|
2563 |
bdevs.append(rd) |
2564 |
return bdevs
|
2565 |
|
2566 |
|
2567 |
def DrbdDisconnectNet(nodes_ip, disks): |
2568 |
"""Disconnects the network on a list of drbd devices.
|
2569 |
|
2570 |
"""
|
2571 |
bdevs = _FindDisks(nodes_ip, disks) |
2572 |
|
2573 |
# disconnect disks
|
2574 |
for rd in bdevs: |
2575 |
try:
|
2576 |
rd.DisconnectNet() |
2577 |
except errors.BlockDeviceError, err:
|
2578 |
_Fail("Can't change network configuration to standalone mode: %s",
|
2579 |
err, exc=True)
|
2580 |
|
2581 |
|
2582 |
def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster): |
2583 |
"""Attaches the network on a list of drbd devices.
|
2584 |
|
2585 |
"""
|
2586 |
bdevs = _FindDisks(nodes_ip, disks) |
2587 |
|
2588 |
if multimaster:
|
2589 |
for idx, rd in enumerate(bdevs): |
2590 |
try:
|
2591 |
_SymlinkBlockDev(instance_name, rd.dev_path, idx) |
2592 |
except EnvironmentError, err: |
2593 |
_Fail("Can't create symlink: %s", err)
|
2594 |
# reconnect disks, switch to new master configuration and if
|
2595 |
# needed primary mode
|
2596 |
for rd in bdevs: |
2597 |
try:
|
2598 |
rd.AttachNet(multimaster) |
2599 |
except errors.BlockDeviceError, err:
|
2600 |
_Fail("Can't change network configuration: %s", err)
|
2601 |
|
2602 |
# wait until the disks are connected; we need to retry the re-attach
|
2603 |
# if the device becomes standalone, as this might happen if the one
|
2604 |
# node disconnects and reconnects in a different mode before the
|
2605 |
# other node reconnects; in this case, one or both of the nodes will
|
2606 |
# decide it has wrong configuration and switch to standalone
|
2607 |
|
2608 |
def _Attach(): |
2609 |
all_connected = True
|
2610 |
|
2611 |
for rd in bdevs: |
2612 |
stats = rd.GetProcStatus() |
2613 |
|
2614 |
all_connected = (all_connected and
|
2615 |
(stats.is_connected or stats.is_in_resync))
|
2616 |
|
2617 |
if stats.is_standalone:
|
2618 |
# peer had different config info and this node became
|
2619 |
# standalone, even though this should not happen with the
|
2620 |
# new staged way of changing disk configs
|
2621 |
try:
|
2622 |
rd.AttachNet(multimaster) |
2623 |
except errors.BlockDeviceError, err:
|
2624 |
_Fail("Can't change network configuration: %s", err)
|
2625 |
|
2626 |
if not all_connected: |
2627 |
raise utils.RetryAgain()
|
2628 |
|
2629 |
try:
|
2630 |
# Start with a delay of 100 miliseconds and go up to 5 seconds
|
2631 |
utils.Retry(_Attach, (0.1, 1.5, 5.0), 2 * 60) |
2632 |
except utils.RetryTimeout:
|
2633 |
_Fail("Timeout in disk reconnecting")
|
2634 |
|
2635 |
if multimaster:
|
2636 |
# change to primary mode
|
2637 |
for rd in bdevs: |
2638 |
try:
|
2639 |
rd.Open() |
2640 |
except errors.BlockDeviceError, err:
|
2641 |
_Fail("Can't change to primary mode: %s", err)
|
2642 |
|
2643 |
|
2644 |
def DrbdWaitSync(nodes_ip, disks): |
2645 |
"""Wait until DRBDs have synchronized.
|
2646 |
|
2647 |
"""
|
2648 |
def _helper(rd): |
2649 |
stats = rd.GetProcStatus() |
2650 |
if not (stats.is_connected or stats.is_in_resync): |
2651 |
raise utils.RetryAgain()
|
2652 |
return stats
|
2653 |
|
2654 |
bdevs = _FindDisks(nodes_ip, disks) |
2655 |
|
2656 |
min_resync = 100
|
2657 |
alldone = True
|
2658 |
for rd in bdevs: |
2659 |
try:
|
2660 |
# poll each second for 15 seconds
|
2661 |
stats = utils.Retry(_helper, 1, 15, args=[rd]) |
2662 |
except utils.RetryTimeout:
|
2663 |
stats = rd.GetProcStatus() |
2664 |
# last check
|
2665 |
if not (stats.is_connected or stats.is_in_resync): |
2666 |
_Fail("DRBD device %s is not in sync: stats=%s", rd, stats)
|
2667 |
alldone = alldone and (not stats.is_in_resync) |
2668 |
if stats.sync_percent is not None: |
2669 |
min_resync = min(min_resync, stats.sync_percent)
|
2670 |
|
2671 |
return (alldone, min_resync)
|
2672 |
|
2673 |
|
2674 |
def PowercycleNode(hypervisor_type): |
2675 |
"""Hard-powercycle the node.
|
2676 |
|
2677 |
Because we need to return first, and schedule the powercycle in the
|
2678 |
background, we won't be able to report failures nicely.
|
2679 |
|
2680 |
"""
|
2681 |
hyper = hypervisor.GetHypervisor(hypervisor_type) |
2682 |
try:
|
2683 |
pid = os.fork() |
2684 |
except OSError: |
2685 |
# if we can't fork, we'll pretend that we're in the child process
|
2686 |
pid = 0
|
2687 |
if pid > 0: |
2688 |
return "Reboot scheduled in 5 seconds" |
2689 |
# ensure the child is running on ram
|
2690 |
try:
|
2691 |
utils.Mlockall() |
2692 |
except Exception: # pylint: disable-msg=W0703 |
2693 |
pass
|
2694 |
time.sleep(5)
|
2695 |
hyper.PowercycleNode() |
2696 |
|
2697 |
|
2698 |
class HooksRunner(object): |
2699 |
"""Hook runner.
|
2700 |
|
2701 |
This class is instantiated on the node side (ganeti-noded) and not
|
2702 |
on the master side.
|
2703 |
|
2704 |
"""
|
2705 |
def __init__(self, hooks_base_dir=None): |
2706 |
"""Constructor for hooks runner.
|
2707 |
|
2708 |
@type hooks_base_dir: str or None
|
2709 |
@param hooks_base_dir: if not None, this overrides the
|
2710 |
L{constants.HOOKS_BASE_DIR} (useful for unittests)
|
2711 |
|
2712 |
"""
|
2713 |
if hooks_base_dir is None: |
2714 |
hooks_base_dir = constants.HOOKS_BASE_DIR |
2715 |
# yeah, _BASE_DIR is not valid for attributes, we use it like a
|
2716 |
# constant
|
2717 |
self._BASE_DIR = hooks_base_dir # pylint: disable-msg=C0103 |
2718 |
|
2719 |
def RunHooks(self, hpath, phase, env): |
2720 |
"""Run the scripts in the hooks directory.
|
2721 |
|
2722 |
@type hpath: str
|
2723 |
@param hpath: the path to the hooks directory which
|
2724 |
holds the scripts
|
2725 |
@type phase: str
|
2726 |
@param phase: either L{constants.HOOKS_PHASE_PRE} or
|
2727 |
L{constants.HOOKS_PHASE_POST}
|
2728 |
@type env: dict
|
2729 |
@param env: dictionary with the environment for the hook
|
2730 |
@rtype: list
|
2731 |
@return: list of 3-element tuples:
|
2732 |
- script path
|
2733 |
- script result, either L{constants.HKR_SUCCESS} or
|
2734 |
L{constants.HKR_FAIL}
|
2735 |
- output of the script
|
2736 |
|
2737 |
@raise errors.ProgrammerError: for invalid input
|
2738 |
parameters
|
2739 |
|
2740 |
"""
|
2741 |
if phase == constants.HOOKS_PHASE_PRE:
|
2742 |
suffix = "pre"
|
2743 |
elif phase == constants.HOOKS_PHASE_POST:
|
2744 |
suffix = "post"
|
2745 |
else:
|
2746 |
_Fail("Unknown hooks phase '%s'", phase)
|
2747 |
|
2748 |
|
2749 |
subdir = "%s-%s.d" % (hpath, suffix)
|
2750 |
dir_name = utils.PathJoin(self._BASE_DIR, subdir)
|
2751 |
|
2752 |
results = [] |
2753 |
|
2754 |
if not os.path.isdir(dir_name): |
2755 |
# for non-existing/non-dirs, we simply exit instead of logging a
|
2756 |
# warning at every operation
|
2757 |
return results
|
2758 |
|
2759 |
runparts_results = utils.RunParts(dir_name, env=env, reset_env=True)
|
2760 |
|
2761 |
for (relname, relstatus, runresult) in runparts_results: |
2762 |
if relstatus == constants.RUNPARTS_SKIP:
|
2763 |
rrval = constants.HKR_SKIP |
2764 |
output = ""
|
2765 |
elif relstatus == constants.RUNPARTS_ERR:
|
2766 |
rrval = constants.HKR_FAIL |
2767 |
output = "Hook script execution error: %s" % runresult
|
2768 |
elif relstatus == constants.RUNPARTS_RUN:
|
2769 |
if runresult.failed:
|
2770 |
rrval = constants.HKR_FAIL |
2771 |
else:
|
2772 |
rrval = constants.HKR_SUCCESS |
2773 |
output = utils.SafeEncode(runresult.output.strip()) |
2774 |
results.append(("%s/%s" % (subdir, relname), rrval, output))
|
2775 |
|
2776 |
return results
|
2777 |
|
2778 |
|
2779 |
class IAllocatorRunner(object): |
2780 |
"""IAllocator runner.
|
2781 |
|
2782 |
This class is instantiated on the node side (ganeti-noded) and not on
|
2783 |
the master side.
|
2784 |
|
2785 |
"""
|
2786 |
@staticmethod
|
2787 |
def Run(name, idata): |
2788 |
"""Run an iallocator script.
|
2789 |
|
2790 |
@type name: str
|
2791 |
@param name: the iallocator script name
|
2792 |
@type idata: str
|
2793 |
@param idata: the allocator input data
|
2794 |
|
2795 |
@rtype: tuple
|
2796 |
@return: two element tuple of:
|
2797 |
- status
|
2798 |
- either error message or stdout of allocator (for success)
|
2799 |
|
2800 |
"""
|
2801 |
alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH, |
2802 |
os.path.isfile) |
2803 |
if alloc_script is None: |
2804 |
_Fail("iallocator module '%s' not found in the search path", name)
|
2805 |
|
2806 |
fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
|
2807 |
try:
|
2808 |
os.write(fd, idata) |
2809 |
os.close(fd) |
2810 |
result = utils.RunCmd([alloc_script, fin_name]) |
2811 |
if result.failed:
|
2812 |
_Fail("iallocator module '%s' failed: %s, output '%s'",
|
2813 |
name, result.fail_reason, result.output) |
2814 |
finally:
|
2815 |
os.unlink(fin_name) |
2816 |
|
2817 |
return result.stdout
|
2818 |
|
2819 |
|
2820 |
class DevCacheManager(object): |
2821 |
"""Simple class for managing a cache of block device information.
|
2822 |
|
2823 |
"""
|
2824 |
_DEV_PREFIX = "/dev/"
|
2825 |
_ROOT_DIR = constants.BDEV_CACHE_DIR |
2826 |
|
2827 |
@classmethod
|
2828 |
def _ConvertPath(cls, dev_path): |
2829 |
"""Converts a /dev/name path to the cache file name.
|
2830 |
|
2831 |
This replaces slashes with underscores and strips the /dev
|
2832 |
prefix. It then returns the full path to the cache file.
|
2833 |
|
2834 |
@type dev_path: str
|
2835 |
@param dev_path: the C{/dev/} path name
|
2836 |
@rtype: str
|
2837 |
@return: the converted path name
|
2838 |
|
2839 |
"""
|
2840 |
if dev_path.startswith(cls._DEV_PREFIX):
|
2841 |
dev_path = dev_path[len(cls._DEV_PREFIX):]
|
2842 |
dev_path = dev_path.replace("/", "_") |
2843 |
fpath = utils.PathJoin(cls._ROOT_DIR, "bdev_%s" % dev_path)
|
2844 |
return fpath
|
2845 |
|
2846 |
@classmethod
|
2847 |
def UpdateCache(cls, dev_path, owner, on_primary, iv_name): |
2848 |
"""Updates the cache information for a given device.
|
2849 |
|
2850 |
@type dev_path: str
|
2851 |
@param dev_path: the pathname of the device
|
2852 |
@type owner: str
|
2853 |
@param owner: the owner (instance name) of the device
|
2854 |
@type on_primary: bool
|
2855 |
@param on_primary: whether this is the primary
|
2856 |
node nor not
|
2857 |
@type iv_name: str
|
2858 |
@param iv_name: the instance-visible name of the
|
2859 |
device, as in objects.Disk.iv_name
|
2860 |
|
2861 |
@rtype: None
|
2862 |
|
2863 |
"""
|
2864 |
if dev_path is None: |
2865 |
logging.error("DevCacheManager.UpdateCache got a None dev_path")
|
2866 |
return
|
2867 |
fpath = cls._ConvertPath(dev_path) |
2868 |
if on_primary:
|
2869 |
state = "primary"
|
2870 |
else:
|
2871 |
state = "secondary"
|
2872 |
if iv_name is None: |
2873 |
iv_name = "not_visible"
|
2874 |
fdata = "%s %s %s\n" % (str(owner), state, iv_name) |
2875 |
try:
|
2876 |
utils.WriteFile(fpath, data=fdata) |
2877 |
except EnvironmentError, err: |
2878 |
logging.exception("Can't update bdev cache for %s: %s", dev_path, err)
|
2879 |
|
2880 |
@classmethod
|
2881 |
def RemoveCache(cls, dev_path): |
2882 |
"""Remove data for a dev_path.
|
2883 |
|
2884 |
This is just a wrapper over L{utils.RemoveFile} with a converted
|
2885 |
path name and logging.
|
2886 |
|
2887 |
@type dev_path: str
|
2888 |
@param dev_path: the pathname of the device
|
2889 |
|
2890 |
@rtype: None
|
2891 |
|
2892 |
"""
|
2893 |
if dev_path is None: |
2894 |
logging.error("DevCacheManager.RemoveCache got a None dev_path")
|
2895 |
return
|
2896 |
fpath = cls._ConvertPath(dev_path) |
2897 |
try:
|
2898 |
utils.RemoveFile(fpath) |
2899 |
except EnvironmentError, err: |
2900 |
logging.exception("Can't update bdev cache for %s: %s", dev_path, err)
|