#
#
-# Copyright (C) 2006, 2007 Google Inc.
+# Copyright (C) 2006, 2007, 2008, 2010, 2011, 2012 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
"""
-import socket
import sys
+import errno
+import logging
+from ganeti import compat
from ganeti import errors
from ganeti import constants
from ganeti import utils
+from ganeti import netutils
+from ganeti import pathutils
+
+
+SSCONF_LOCK_TIMEOUT = 10
+
+#: Valid ssconf keys
+_VALID_KEYS = compat.UniqueFrozenset([
+ constants.SS_CLUSTER_NAME,
+ constants.SS_CLUSTER_TAGS,
+ constants.SS_FILE_STORAGE_DIR,
+ constants.SS_SHARED_FILE_STORAGE_DIR,
+ constants.SS_MASTER_CANDIDATES,
+ constants.SS_MASTER_CANDIDATES_IPS,
+ constants.SS_MASTER_IP,
+ constants.SS_MASTER_NETDEV,
+ constants.SS_MASTER_NETMASK,
+ constants.SS_MASTER_NODE,
+ constants.SS_NODE_LIST,
+ constants.SS_NODE_PRIMARY_IPS,
+ constants.SS_NODE_SECONDARY_IPS,
+ constants.SS_OFFLINE_NODES,
+ constants.SS_ONLINE_NODES,
+ constants.SS_PRIMARY_IP_FAMILY,
+ constants.SS_INSTANCE_LIST,
+ constants.SS_RELEASE_VERSION,
+ constants.SS_HYPERVISOR_LIST,
+ constants.SS_MAINTAIN_NODE_HEALTH,
+ constants.SS_UID_POOL,
+ constants.SS_NODEGROUPS,
+ constants.SS_NETWORKS,
+ constants.SS_HVPARAMS_XEN_PVM,
+ constants.SS_HVPARAMS_XEN_FAKE,
+ constants.SS_HVPARAMS_XEN_HVM,
+ constants.SS_HVPARAMS_XEN_KVM,
+ constants.SS_HVPARAMS_XEN_CHROOT,
+ constants.SS_HVPARAMS_XEN_LXC,
+ ])
+
+#: Maximum size for ssconf files
+_MAX_SIZE = 128 * 1024
+
+
+def ReadSsconfFile(filename):
+ """Reads an ssconf file and verifies its size.
+
+ @type filename: string
+ @param filename: Path to file
+ @rtype: string
+ @return: File contents without newlines at the end
+ @raise RuntimeError: When the file size exceeds L{_MAX_SIZE}
+ """
+ statcb = utils.FileStatHelper()
+
+ data = utils.ReadFile(filename, size=_MAX_SIZE, preread=statcb)
+
+ if statcb.st.st_size > _MAX_SIZE:
+ msg = ("File '%s' has a size of %s bytes (up to %s allowed)" %
+ (filename, statcb.st.st_size, _MAX_SIZE))
+ raise RuntimeError(msg)
+
+ return data.rstrip("\n")
-class SimpleStore:
+
+class SimpleStore(object):
"""Interface to static cluster data.
- This is different that the config.ConfigWriter class in that it
- holds data that is (mostly) constant after the cluster
- initialization. Its purpose is to allow limited customization of
- things which would otherwise normally live in constants.py. Note
- that this data cannot live in ConfigWriter as that is available only
- on the master node, and our data must be readable by both the master
- and the nodes.
+ This is different that the config.ConfigWriter and
+ SimpleConfigReader classes in that it holds data that will always be
+ present, even on nodes which don't have all the cluster data.
Other particularities of the datastore:
- keys are restricted to predefined values
- - values are small (<4k)
- - some keys are handled specially (read from the system)
"""
- _SS_FILEPREFIX = "ssconf_"
- SS_HYPERVISOR = "hypervisor"
- SS_NODED_PASS = "node_pass"
- SS_MASTER_NODE = "master_node"
- SS_MASTER_IP = "master_ip"
- SS_MASTER_NETDEV = "master_netdev"
- SS_CLUSTER_NAME = "cluster_name"
- SS_FILE_STORAGE_DIR = "file_storage_dir"
- SS_CONFIG_VERSION = "config_version"
- _VALID_KEYS = (SS_HYPERVISOR, SS_NODED_PASS, SS_MASTER_NODE, SS_MASTER_IP,
- SS_MASTER_NETDEV, SS_CLUSTER_NAME, SS_FILE_STORAGE_DIR,
- SS_CONFIG_VERSION)
- _MAX_SIZE = 4096
-
- def __init__(self, cfg_location=None):
+ def __init__(self, cfg_location=None, _lockfile=pathutils.SSCONF_LOCK_FILE):
if cfg_location is None:
- self._cfg_dir = constants.DATA_DIR
+ self._cfg_dir = pathutils.DATA_DIR
else:
self._cfg_dir = cfg_location
+ self._lockfile = _lockfile
+
def KeyToFilename(self, key):
"""Convert a given key into filename.
"""
- if key not in self._VALID_KEYS:
+ if key not in _VALID_KEYS:
raise errors.ProgrammerError("Invalid key requested from SSConf: '%s'"
% str(key))
- filename = self._cfg_dir + '/' + self._SS_FILEPREFIX + key
+ filename = self._cfg_dir + "/" + constants.SSCONF_FILEPREFIX + key
return filename
- def _ReadFile(self, key):
+ def _ReadFile(self, key, default=None):
"""Generic routine to read keys.
This will read the file which holds the value requested. Errors
"""
filename = self.KeyToFilename(key)
try:
- fh = file(filename, 'r')
- try:
- data = fh.readline(self._MAX_SIZE)
- data = data.rstrip('\n')
- finally:
- fh.close()
+ return ReadSsconfFile(filename)
except EnvironmentError, err:
- raise errors.ConfigurationError("Can't read from the ssconf file:"
- " '%s'" % str(err))
- return data
+ if err.errno == errno.ENOENT and default is not None:
+ return default
+ raise errors.ConfigurationError("Can't read ssconf file %s: %s" %
+ (filename, str(err)))
- def GetNodeDaemonPort(self):
- """Get the node daemon port for this cluster.
+ def ReadAll(self):
+ """Reads all keys and returns their values.
- Note that this routine does not read a ganeti-specific file, but
- instead uses socket.getservbyname to allow pre-customization of
- this parameter outside of ganeti.
+ @rtype: dict
+ @return: Dictionary, ssconf key as key, value as value
"""
+ result = []
+
+ for key in _VALID_KEYS:
+ try:
+ value = self._ReadFile(key)
+ except errors.ConfigurationError:
+ # Ignore non-existing files
+ pass
+ else:
+ result.append((key, value))
+
+ return dict(result)
+
+ def WriteFiles(self, values, dry_run=False):
+ """Writes ssconf files used by external scripts.
+
+ @type values: dict
+ @param values: Dictionary of (name, value)
+ @type dry_run boolean
+ @param dry_run: Whether to perform a dry run
+
+ """
+ ssconf_lock = utils.FileLock.Open(self._lockfile)
+
+ # Get lock while writing files
+ ssconf_lock.Exclusive(blocking=True, timeout=SSCONF_LOCK_TIMEOUT)
try:
- port = socket.getservbyname("ganeti-noded", "tcp")
- except socket.error:
- port = constants.DEFAULT_NODED_PORT
+ for name, value in values.iteritems():
+ if value and not value.endswith("\n"):
+ value += "\n"
- return port
+ if len(value) > _MAX_SIZE:
+ msg = ("Value '%s' has a length of %s bytes, but only up to %s are"
+ " allowed" % (name, len(value), _MAX_SIZE))
+ raise errors.ConfigurationError(msg)
+
+ utils.WriteFile(self.KeyToFilename(name), data=value,
+ mode=constants.SS_FILE_PERMS,
+ dry_run=dry_run)
+ finally:
+ ssconf_lock.Unlock()
+
+ def GetFileList(self):
+ """Return the list of all config files.
- def GetHypervisorType(self):
- """Get the hypervisor type for this cluster.
+ This is used for computing node replication data.
"""
- return self._ReadFile(self.SS_HYPERVISOR)
+ return [self.KeyToFilename(key) for key in _VALID_KEYS]
- def GetNodeDaemonPassword(self):
- """Get the node password for this cluster.
+ def GetClusterName(self):
+ """Get the cluster name.
"""
- return self._ReadFile(self.SS_NODED_PASS)
+ return self._ReadFile(constants.SS_CLUSTER_NAME)
- def GetMasterNode(self):
- """Get the hostname of the master node for this cluster.
+ def GetFileStorageDir(self):
+ """Get the file storage dir.
+
+ """
+ return self._ReadFile(constants.SS_FILE_STORAGE_DIR)
+
+ def GetSharedFileStorageDir(self):
+ """Get the shared file storage dir.
+
+ """
+ return self._ReadFile(constants.SS_SHARED_FILE_STORAGE_DIR)
+
+ def GetMasterCandidates(self):
+ """Return the list of master candidates.
+
+ """
+ data = self._ReadFile(constants.SS_MASTER_CANDIDATES)
+ nl = data.splitlines(False)
+ return nl
+
+ def GetMasterCandidatesIPList(self):
+ """Return the list of master candidates' primary IP.
"""
- return self._ReadFile(self.SS_MASTER_NODE)
+ data = self._ReadFile(constants.SS_MASTER_CANDIDATES_IPS)
+ nl = data.splitlines(False)
+ return nl
def GetMasterIP(self):
"""Get the IP of the master node for this cluster.
"""
- return self._ReadFile(self.SS_MASTER_IP)
+ return self._ReadFile(constants.SS_MASTER_IP)
def GetMasterNetdev(self):
"""Get the netdev to which we'll add the master ip.
"""
- return self._ReadFile(self.SS_MASTER_NETDEV)
+ return self._ReadFile(constants.SS_MASTER_NETDEV)
- def GetClusterName(self):
- """Get the cluster name.
+ def GetMasterNetmask(self):
+ """Get the master netmask.
"""
- return self._ReadFile(self.SS_CLUSTER_NAME)
+ try:
+ return self._ReadFile(constants.SS_MASTER_NETMASK)
+ except errors.ConfigurationError:
+ family = self.GetPrimaryIPFamily()
+ ipcls = netutils.IPAddress.GetClassFromIpFamily(family)
+ return ipcls.iplen
- def GetFileStorageDir(self):
- """Get the file storage dir.
+ def GetMasterNode(self):
+ """Get the hostname of the master node for this cluster.
"""
- return self._ReadFile(self.SS_FILE_STORAGE_DIR)
+ return self._ReadFile(constants.SS_MASTER_NODE)
- def GetConfigVersion(self):
- """Get the configuration version.
+ def GetNodeList(self):
+ """Return the list of cluster nodes.
"""
- value = self._ReadFile(self.SS_CONFIG_VERSION)
- try:
- return int(value)
- except (ValueError, TypeError), err:
- raise errors.ConfigurationError("Failed to convert config version %s to"
- " int: '%s'" % (value, str(err)))
+ data = self._ReadFile(constants.SS_NODE_LIST)
+ nl = data.splitlines(False)
+ return nl
- def GetFileList(self):
- """Return the list of all config files.
+ def GetNodePrimaryIPList(self):
+ """Return the list of cluster nodes' primary IP.
- This is used for computing node replication data.
+ """
+ data = self._ReadFile(constants.SS_NODE_PRIMARY_IPS)
+ nl = data.splitlines(False)
+ return nl
+
+ def GetNodeSecondaryIPList(self):
+ """Return the list of cluster nodes' secondary IP.
"""
- return [self.KeyToFilename(key) for key in self._VALID_KEYS]
+ data = self._ReadFile(constants.SS_NODE_SECONDARY_IPS)
+ nl = data.splitlines(False)
+ return nl
+ def GetNodegroupList(self):
+ """Return the list of nodegroups.
-class WritableSimpleStore(SimpleStore):
- """This is a read/write interface to SimpleStore, which is used rarely, when
- values need to be changed. Since WriteFile handles updates in an atomic way
- it should be fine to use two WritableSimpleStore at the same time, but in
- the future we might want to put additional protection for this class.
+ """
+ data = self._ReadFile(constants.SS_NODEGROUPS)
+ nl = data.splitlines(False)
+ return nl
- A WritableSimpleStore cannot be used to update system-dependent values.
+ def GetNetworkList(self):
+ """Return the list of networks.
- """
+ """
+ data = self._ReadFile(constants.SS_NETWORKS)
+ nl = data.splitlines(False)
+ return nl
- def SetKey(self, key, value):
- """Set the value of a key.
+ def GetClusterTags(self):
+ """Return the cluster tags.
- This should be used only when adding a node to a cluster, or in other
- infrequent operations such as cluster-rename or master-failover.
+ """
+ data = self._ReadFile(constants.SS_CLUSTER_TAGS)
+ nl = data.splitlines(False)
+ return nl
+
+ def GetHypervisorList(self):
+ """Return the list of enabled hypervisors.
"""
- file_name = self.KeyToFilename(key)
- utils.WriteFile(file_name, data="%s\n" % str(value),
- uid=0, gid=0, mode=0400)
+ data = self._ReadFile(constants.SS_HYPERVISOR_LIST)
+ nl = data.splitlines(False)
+ return nl
+
+ def GetHvparamsForHypervisor(self, hvname):
+ """Return the hypervisor parameters of the given hypervisor.
+
+ @type hvname: string
+ @param hvname: name of the hypervisor, must be in C{constants.HYPER_TYPES}
+ @rtype: dict of strings
+ @returns: dictionary with hypervisor parameters
+
+ """
+ data = self._ReadFile(constants.SS_HVPARAMS_PREF + hvname)
+ lines = data.splitlines(False)
+ hvparams = {}
+ for line in lines:
+ (key, value) = line.split("=")
+ hvparams[key] = value
+ return hvparams
+
+ def GetHvparams(self):
+ """Return the hypervisor parameters of all hypervisors.
+
+ @rtype: dict of dict of strings
+ @returns: dictionary mapping hypervisor names to hvparams
+
+ """
+ all_hvparams = {}
+ for hv in constants.HYPER_TYPES:
+ all_hvparams[hv] = self.GetHvparamsForHypervisor(hv)
+ return all_hvparams
+
+ def GetMaintainNodeHealth(self):
+ """Return the value of the maintain_node_health option.
+
+ """
+ data = self._ReadFile(constants.SS_MAINTAIN_NODE_HEALTH)
+ # we rely on the bool serialization here
+ return data == "True"
+
+ def GetUidPool(self):
+ """Return the user-id pool definition string.
+
+ The separator character is a newline.
+
+ The return value can be parsed using uidpool.ParseUidPool()::
+
+ ss = ssconf.SimpleStore()
+ uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\\n")
+
+ """
+ data = self._ReadFile(constants.SS_UID_POOL)
+ return data
+
+ def GetPrimaryIPFamily(self):
+ """Return the cluster-wide primary address family.
+
+ """
+ try:
+ return int(self._ReadFile(constants.SS_PRIMARY_IP_FAMILY,
+ default=netutils.IP4Address.family))
+ except (ValueError, TypeError), err:
+ raise errors.ConfigurationError("Error while trying to parse primary IP"
+ " family: %s" % err)
+
+
+def WriteSsconfFiles(values, dry_run=False):
+ """Update all ssconf files.
+
+ Wrapper around L{SimpleStore.WriteFiles}.
+
+ """
+ SimpleStore().WriteFiles(values, dry_run=dry_run)
def GetMasterAndMyself(ss=None):
The function does not handle any errors, these should be handled in
the caller (errors.ConfigurationError, errors.ResolverError).
+ @param ss: either a sstore.SimpleConfigReader or a
+ sstore.SimpleStore instance
+ @rtype: tuple
+ @return: a tuple (master node name, my own name)
+
"""
if ss is None:
ss = SimpleStore()
- return ss.GetMasterNode(), utils.HostInfo().name
+ return ss.GetMasterNode(), netutils.Hostname.GetSysName()
+
def CheckMaster(debug, ss=None):
"""Checks the node setup.
if debug:
sys.stderr.write("Not master, exiting.\n")
sys.exit(constants.EXIT_NOTMASTER)
+
+
+def VerifyClusterName(name, _cfg_location=None):
+ """Verifies cluster name against a local cluster name.
+
+ @type name: string
+ @param name: Cluster name
+
+ """
+ sstore = SimpleStore(cfg_location=_cfg_location)
+
+ try:
+ local_name = sstore.GetClusterName()
+ except errors.ConfigurationError, err:
+ logging.debug("Can't get local cluster name: %s", err)
+ else:
+ if name != local_name:
+ raise errors.GenericError("Current cluster name is '%s'" % local_name)
+
+
+def VerifyKeys(keys):
+ """Raises an exception if unknown ssconf keys are given.
+
+ @type keys: sequence
+ @param keys: Key names to verify
+ @raise errors.GenericError: When invalid keys were found
+
+ """
+ invalid = frozenset(keys) - _VALID_KEYS
+ if invalid:
+ raise errors.GenericError("Invalid ssconf keys: %s" %
+ utils.CommaJoin(sorted(invalid)))
projects / ganeti-local / blobdiff