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#!/usr/bin/python |
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# |
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|
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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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|
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|
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"""Ganeti node daemon""" |
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|
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# functions in this module need to have a given name structure, so: |
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# pylint: disable-msg=C0103 |
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|
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import os |
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import sys |
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import traceback |
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import SocketServer |
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import errno |
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import logging |
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import signal |
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|
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from optparse import OptionParser |
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|
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from ganeti import backend |
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from ganeti import constants |
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from ganeti import objects |
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from ganeti import errors |
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from ganeti import jstore |
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from ganeti import daemon |
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from ganeti import http |
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from ganeti import utils |
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|
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import ganeti.http.server |
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|
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|
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queue_lock = None |
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|
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|
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def _RequireJobQueueLock(fn): |
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"""Decorator for job queue manipulating functions. |
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|
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""" |
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QUEUE_LOCK_TIMEOUT = 10 |
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|
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def wrapper(*args, **kwargs): |
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# Locking in exclusive, blocking mode because there could be several |
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# children running at the same time. Waiting up to 10 seconds. |
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queue_lock.Exclusive(blocking=True, timeout=QUEUE_LOCK_TIMEOUT) |
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try: |
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return fn(*args, **kwargs) |
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finally: |
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queue_lock.Unlock() |
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|
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return wrapper |
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|
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|
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class NodeHttpServer(http.server.HttpServer): |
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"""The server implementation. |
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|
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This class holds all methods exposed over the RPC interface. |
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|
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""" |
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def __init__(self, *args, **kwargs): |
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http.server.HttpServer.__init__(self, *args, **kwargs) |
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self.noded_pid = os.getpid() |
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|
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def HandleRequest(self, req): |
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"""Handle a request. |
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|
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""" |
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if req.request_method.upper() != http.HTTP_PUT: |
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raise http.HttpBadRequest() |
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|
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path = req.request_path |
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if path.startswith("/"): |
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path = path[1:] |
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|
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method = getattr(self, "perspective_%s" % path, None) |
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if method is None: |
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raise http.HttpNotFound() |
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|
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try: |
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rvalue = method(req.request_body) |
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if not isinstance(rvalue, tuple): |
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return (False, "Invalid result from backend function: expected" |
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" tuple, got %s" % type(rvalue)) |
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elif len(rvalue) != 2: |
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return (False, "Invalid result from backend function: expected" |
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" 2-element tuple, got tuple of length %d" % len(rvalue)) |
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else: |
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return rvalue |
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|
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except backend.RPCFail, err: |
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# our custom failure exception; str(err) works fine if the |
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# exception was constructed with a single argument, and in |
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# this case, err.message == err.args[0] == str(err) |
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return (False, str(err)) |
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except errors.QuitGanetiException, err: |
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# Tell parent to quit |
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logging.info("Shutting down the node daemon, arguments: %s", |
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str(err.args)) |
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os.kill(self.noded_pid, signal.SIGTERM) |
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# And return the error's arguments, which must be already in |
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# correct tuple format |
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return err.args |
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except Exception, err: |
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logging.exception("Error in RPC call") |
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return False, "Error while executing backend function: %s" % str(err) |
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|
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# the new block devices -------------------------- |
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|
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@staticmethod |
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def perspective_blockdev_create(params): |
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"""Create a block device. |
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|
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""" |
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bdev_s, size, owner, on_primary, info = params |
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bdev = objects.Disk.FromDict(bdev_s) |
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if bdev is None: |
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raise ValueError("can't unserialize data!") |
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return backend.BlockdevCreate(bdev, size, owner, on_primary, info) |
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|
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@staticmethod |
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def perspective_blockdev_remove(params): |
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"""Remove a block device. |
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|
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""" |
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bdev_s = params[0] |
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bdev = objects.Disk.FromDict(bdev_s) |
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return backend.BlockdevRemove(bdev) |
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|
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@staticmethod |
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def perspective_blockdev_rename(params): |
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"""Remove a block device. |
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|
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""" |
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devlist = [(objects.Disk.FromDict(ds), uid) for ds, uid in params] |
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return backend.BlockdevRename(devlist) |
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|
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@staticmethod |
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def perspective_blockdev_assemble(params): |
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"""Assemble a block device. |
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|
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""" |
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bdev_s, owner, on_primary = params |
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bdev = objects.Disk.FromDict(bdev_s) |
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if bdev is None: |
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raise ValueError("can't unserialize data!") |
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return backend.BlockdevAssemble(bdev, owner, on_primary) |
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|
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@staticmethod |
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def perspective_blockdev_shutdown(params): |
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"""Shutdown a block device. |
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|
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""" |
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bdev_s = params[0] |
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bdev = objects.Disk.FromDict(bdev_s) |
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if bdev is None: |
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raise ValueError("can't unserialize data!") |
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return backend.BlockdevShutdown(bdev) |
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|
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@staticmethod |
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def perspective_blockdev_addchildren(params): |
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"""Add a child to a mirror device. |
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|
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Note: this is only valid for mirror devices. It's the caller's duty |
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to send a correct disk, otherwise we raise an error. |
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|
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""" |
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bdev_s, ndev_s = params |
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bdev = objects.Disk.FromDict(bdev_s) |
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ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s] |
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if bdev is None or ndevs.count(None) > 0: |
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raise ValueError("can't unserialize data!") |
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return backend.BlockdevAddchildren(bdev, ndevs) |
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|
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@staticmethod |
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def perspective_blockdev_removechildren(params): |
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"""Remove a child from a mirror device. |
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|
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This is only valid for mirror devices, of course. It's the callers |
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duty to send a correct disk, otherwise we raise an error. |
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|
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""" |
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bdev_s, ndev_s = params |
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bdev = objects.Disk.FromDict(bdev_s) |
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ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s] |
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if bdev is None or ndevs.count(None) > 0: |
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raise ValueError("can't unserialize data!") |
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return backend.BlockdevRemovechildren(bdev, ndevs) |
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|
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@staticmethod |
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def perspective_blockdev_getmirrorstatus(params): |
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"""Return the mirror status for a list of disks. |
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|
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""" |
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disks = [objects.Disk.FromDict(dsk_s) |
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for dsk_s in params] |
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return backend.BlockdevGetmirrorstatus(disks) |
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|
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@staticmethod |
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def perspective_blockdev_find(params): |
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"""Expose the FindBlockDevice functionality for a disk. |
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|
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This will try to find but not activate a disk. |
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|
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""" |
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disk = objects.Disk.FromDict(params[0]) |
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return backend.BlockdevFind(disk) |
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|
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@staticmethod |
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def perspective_blockdev_snapshot(params): |
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"""Create a snapshot device. |
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|
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Note that this is only valid for LVM disks, if we get passed |
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something else we raise an exception. The snapshot device can be |
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remove by calling the generic block device remove call. |
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|
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""" |
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cfbd = objects.Disk.FromDict(params[0]) |
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return backend.BlockdevSnapshot(cfbd) |
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|
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@staticmethod |
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def perspective_blockdev_grow(params): |
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"""Grow a stack of devices. |
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|
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""" |
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cfbd = objects.Disk.FromDict(params[0]) |
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amount = params[1] |
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return backend.BlockdevGrow(cfbd, amount) |
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|
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@staticmethod |
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def perspective_blockdev_close(params): |
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"""Closes the given block devices. |
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|
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""" |
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disks = [objects.Disk.FromDict(cf) for cf in params[1]] |
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return backend.BlockdevClose(params[0], disks) |
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|
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# blockdev/drbd specific methods ---------- |
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|
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@staticmethod |
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def perspective_drbd_disconnect_net(params): |
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"""Disconnects the network connection of drbd disks. |
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|
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Note that this is only valid for drbd disks, so the members of the |
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disk list must all be drbd devices. |
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|
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""" |
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nodes_ip, disks = params |
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disks = [objects.Disk.FromDict(cf) for cf in disks] |
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return backend.DrbdDisconnectNet(nodes_ip, disks) |
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|
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@staticmethod |
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def perspective_drbd_attach_net(params): |
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"""Attaches the network connection of drbd disks. |
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|
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Note that this is only valid for drbd disks, so the members of the |
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disk list must all be drbd devices. |
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|
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""" |
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nodes_ip, disks, instance_name, multimaster = params |
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disks = [objects.Disk.FromDict(cf) for cf in disks] |
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return backend.DrbdAttachNet(nodes_ip, disks, |
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instance_name, multimaster) |
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|
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@staticmethod |
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def perspective_drbd_wait_sync(params): |
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"""Wait until DRBD disks are synched. |
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|
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Note that this is only valid for drbd disks, so the members of the |
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disk list must all be drbd devices. |
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|
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""" |
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nodes_ip, disks = params |
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disks = [objects.Disk.FromDict(cf) for cf in disks] |
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return backend.DrbdWaitSync(nodes_ip, disks) |
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|
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# export/import -------------------------- |
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|
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@staticmethod |
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def perspective_snapshot_export(params): |
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"""Export a given snapshot. |
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|
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""" |
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disk = objects.Disk.FromDict(params[0]) |
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dest_node = params[1] |
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instance = objects.Instance.FromDict(params[2]) |
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cluster_name = params[3] |
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dev_idx = params[4] |
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return backend.ExportSnapshot(disk, dest_node, instance, |
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cluster_name, dev_idx) |
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|
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@staticmethod |
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def perspective_finalize_export(params): |
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"""Expose the finalize export functionality. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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snap_disks = [objects.Disk.FromDict(str_data) |
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for str_data in params[1]] |
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return backend.FinalizeExport(instance, snap_disks) |
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|
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@staticmethod |
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def perspective_export_info(params): |
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"""Query information about an existing export on this node. |
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|
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The given path may not contain an export, in which case we return |
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None. |
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|
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""" |
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path = params[0] |
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return backend.ExportInfo(path) |
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|
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@staticmethod |
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def perspective_export_list(params): |
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"""List the available exports on this node. |
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|
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Note that as opposed to export_info, which may query data about an |
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export in any path, this only queries the standard Ganeti path |
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(constants.EXPORT_DIR). |
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|
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""" |
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return backend.ListExports() |
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|
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@staticmethod |
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def perspective_export_remove(params): |
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"""Remove an export. |
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|
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""" |
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export = params[0] |
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return backend.RemoveExport(export) |
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|
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# volume -------------------------- |
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|
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@staticmethod |
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def perspective_volume_list(params): |
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"""Query the list of logical volumes in a given volume group. |
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|
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""" |
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vgname = params[0] |
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return True, backend.GetVolumeList(vgname) |
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|
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@staticmethod |
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def perspective_vg_list(params): |
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"""Query the list of volume groups. |
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|
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""" |
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return backend.ListVolumeGroups() |
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|
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# bridge -------------------------- |
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|
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@staticmethod |
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def perspective_bridges_exist(params): |
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"""Check if all bridges given exist on this node. |
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|
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""" |
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bridges_list = params[0] |
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return backend.BridgesExist(bridges_list) |
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|
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# instance -------------------------- |
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|
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@staticmethod |
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def perspective_instance_os_add(params): |
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"""Install an OS on a given instance. |
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|
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""" |
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inst_s = params[0] |
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inst = objects.Instance.FromDict(inst_s) |
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reinstall = params[1] |
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return backend.InstanceOsAdd(inst, reinstall) |
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|
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@staticmethod |
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def perspective_instance_run_rename(params): |
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"""Runs the OS rename script for an instance. |
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|
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""" |
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inst_s, old_name = params |
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inst = objects.Instance.FromDict(inst_s) |
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return backend.RunRenameInstance(inst, old_name) |
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|
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@staticmethod |
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def perspective_instance_os_import(params): |
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"""Run the import function of an OS onto a given instance. |
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|
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""" |
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inst_s, src_node, src_images, cluster_name = params |
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inst = objects.Instance.FromDict(inst_s) |
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return backend.ImportOSIntoInstance(inst, src_node, src_images, |
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cluster_name) |
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|
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@staticmethod |
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def perspective_instance_shutdown(params): |
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"""Shutdown an instance. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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return backend.InstanceShutdown(instance) |
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|
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@staticmethod |
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def perspective_instance_start(params): |
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"""Start an instance. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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return backend.StartInstance(instance) |
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|
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@staticmethod |
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def perspective_migration_info(params): |
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"""Gather information about an instance to be migrated. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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return backend.MigrationInfo(instance) |
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|
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@staticmethod |
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def perspective_accept_instance(params): |
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"""Prepare the node to accept an instance. |
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|
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""" |
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instance, info, target = params |
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instance = objects.Instance.FromDict(instance) |
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return backend.AcceptInstance(instance, info, target) |
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|
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@staticmethod |
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def perspective_finalize_migration(params): |
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"""Finalize the instance migration. |
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|
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""" |
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instance, info, success = params |
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instance = objects.Instance.FromDict(instance) |
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return backend.FinalizeMigration(instance, info, success) |
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|
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@staticmethod |
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def perspective_instance_migrate(params): |
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"""Migrates an instance. |
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|
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""" |
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instance, target, live = params |
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instance = objects.Instance.FromDict(instance) |
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return backend.MigrateInstance(instance, target, live) |
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|
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@staticmethod |
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def perspective_instance_reboot(params): |
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"""Reboot an instance. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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reboot_type = params[1] |
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return backend.InstanceReboot(instance, reboot_type) |
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|
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@staticmethod |
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def perspective_instance_info(params): |
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"""Query instance information. |
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|
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""" |
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return backend.GetInstanceInfo(params[0], params[1]) |
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|
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@staticmethod |
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def perspective_instance_migratable(params): |
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"""Query whether the specified instance can be migrated. |
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|
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""" |
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instance = objects.Instance.FromDict(params[0]) |
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return backend.GetInstanceMigratable(instance) |
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|
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@staticmethod |
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def perspective_all_instances_info(params): |
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"""Query information about all instances. |
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|
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""" |
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return backend.GetAllInstancesInfo(params[0]) |
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|
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@staticmethod |
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def perspective_instance_list(params): |
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"""Query the list of running instances. |
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|
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""" |
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return True, backend.GetInstanceList(params[0]) |
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|
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# node -------------------------- |
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|
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@staticmethod |
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def perspective_node_tcp_ping(params): |
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"""Do a TcpPing on the remote node. |
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|
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""" |
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return utils.TcpPing(params[1], params[2], timeout=params[3], |
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live_port_needed=params[4], source=params[0]) |
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|
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@staticmethod |
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def perspective_node_has_ip_address(params): |
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"""Checks if a node has the given ip address. |
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|
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""" |
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return True, utils.OwnIpAddress(params[0]) |
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|
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@staticmethod |
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def perspective_node_info(params): |
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"""Query node information. |
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|
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""" |
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vgname, hypervisor_type = params |
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return backend.GetNodeInfo(vgname, hypervisor_type) |
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|
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@staticmethod |
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def perspective_node_add(params): |
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"""Complete the registration of this node in the cluster. |
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|
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""" |
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return backend.AddNode(params[0], params[1], params[2], |
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params[3], params[4], params[5]) |
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|
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@staticmethod |
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def perspective_node_verify(params): |
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"""Run a verify sequence on this node. |
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|
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""" |
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return backend.VerifyNode(params[0], params[1]) |
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|
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@staticmethod |
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def perspective_node_start_master(params): |
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"""Promote this node to master status. |
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|
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""" |
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return backend.StartMaster(params[0]) |
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|
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@staticmethod |
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def perspective_node_stop_master(params): |
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"""Demote this node from master status. |
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|
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""" |
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return backend.StopMaster(params[0]) |
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|
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@staticmethod |
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def perspective_node_leave_cluster(params): |
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"""Cleanup after leaving a cluster. |
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|
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""" |
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return backend.LeaveCluster() |
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|
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@staticmethod |
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def perspective_node_volumes(params): |
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"""Query the list of all logical volume groups. |
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|
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""" |
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return backend.NodeVolumes() |
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|
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@staticmethod |
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def perspective_node_demote_from_mc(params): |
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"""Demote a node from the master candidate role. |
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|
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""" |
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return backend.DemoteFromMC() |
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|
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|
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@staticmethod |
571 |
def perspective_node_powercycle(params): |
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"""Tries to powercycle the nod. |
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|
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""" |
575 |
hypervisor_type = params[0] |
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return backend.PowercycleNode(hypervisor_type) |
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|
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|
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# cluster -------------------------- |
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|
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@staticmethod |
582 |
def perspective_version(params): |
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"""Query version information. |
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|
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""" |
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return True, constants.PROTOCOL_VERSION |
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|
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@staticmethod |
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def perspective_upload_file(params): |
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"""Upload a file. |
591 |
|
592 |
Note that the backend implementation imposes strict rules on which |
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files are accepted. |
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|
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""" |
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return backend.UploadFile(*params) |
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|
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@staticmethod |
599 |
def perspective_master_info(params): |
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"""Query master information. |
601 |
|
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""" |
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return backend.GetMasterInfo() |
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|
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@staticmethod |
606 |
def perspective_write_ssconf_files(params): |
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"""Write ssconf files. |
608 |
|
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""" |
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(values,) = params |
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return backend.WriteSsconfFiles(values) |
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|
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# os ----------------------- |
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|
615 |
@staticmethod |
616 |
def perspective_os_diagnose(params): |
617 |
"""Query detailed information about existing OSes. |
618 |
|
619 |
""" |
620 |
return backend.DiagnoseOS() |
621 |
|
622 |
@staticmethod |
623 |
def perspective_os_get(params): |
624 |
"""Query information about a given OS. |
625 |
|
626 |
""" |
627 |
name = params[0] |
628 |
os_obj = backend.OSFromDisk(name) |
629 |
return True, os_obj.ToDict() |
630 |
|
631 |
# hooks ----------------------- |
632 |
|
633 |
@staticmethod |
634 |
def perspective_hooks_runner(params): |
635 |
"""Run hook scripts. |
636 |
|
637 |
""" |
638 |
hpath, phase, env = params |
639 |
hr = backend.HooksRunner() |
640 |
return hr.RunHooks(hpath, phase, env) |
641 |
|
642 |
# iallocator ----------------- |
643 |
|
644 |
@staticmethod |
645 |
def perspective_iallocator_runner(params): |
646 |
"""Run an iallocator script. |
647 |
|
648 |
""" |
649 |
name, idata = params |
650 |
iar = backend.IAllocatorRunner() |
651 |
return iar.Run(name, idata) |
652 |
|
653 |
# test ----------------------- |
654 |
|
655 |
@staticmethod |
656 |
def perspective_test_delay(params): |
657 |
"""Run test delay. |
658 |
|
659 |
""" |
660 |
duration = params[0] |
661 |
return utils.TestDelay(duration) |
662 |
|
663 |
# file storage --------------- |
664 |
|
665 |
@staticmethod |
666 |
def perspective_file_storage_dir_create(params): |
667 |
"""Create the file storage directory. |
668 |
|
669 |
""" |
670 |
file_storage_dir = params[0] |
671 |
return backend.CreateFileStorageDir(file_storage_dir) |
672 |
|
673 |
@staticmethod |
674 |
def perspective_file_storage_dir_remove(params): |
675 |
"""Remove the file storage directory. |
676 |
|
677 |
""" |
678 |
file_storage_dir = params[0] |
679 |
return backend.RemoveFileStorageDir(file_storage_dir) |
680 |
|
681 |
@staticmethod |
682 |
def perspective_file_storage_dir_rename(params): |
683 |
"""Rename the file storage directory. |
684 |
|
685 |
""" |
686 |
old_file_storage_dir = params[0] |
687 |
new_file_storage_dir = params[1] |
688 |
return backend.RenameFileStorageDir(old_file_storage_dir, |
689 |
new_file_storage_dir) |
690 |
|
691 |
# jobs ------------------------ |
692 |
|
693 |
@staticmethod |
694 |
@_RequireJobQueueLock |
695 |
def perspective_jobqueue_update(params): |
696 |
"""Update job queue. |
697 |
|
698 |
""" |
699 |
(file_name, content) = params |
700 |
return backend.JobQueueUpdate(file_name, content) |
701 |
|
702 |
@staticmethod |
703 |
@_RequireJobQueueLock |
704 |
def perspective_jobqueue_purge(params): |
705 |
"""Purge job queue. |
706 |
|
707 |
""" |
708 |
return backend.JobQueuePurge() |
709 |
|
710 |
@staticmethod |
711 |
@_RequireJobQueueLock |
712 |
def perspective_jobqueue_rename(params): |
713 |
"""Rename a job queue file. |
714 |
|
715 |
""" |
716 |
# TODO: What if a file fails to rename? |
717 |
return True, [backend.JobQueueRename(old, new) for old, new in params] |
718 |
|
719 |
@staticmethod |
720 |
def perspective_jobqueue_set_drain(params): |
721 |
"""Set/unset the queue drain flag. |
722 |
|
723 |
""" |
724 |
drain_flag = params[0] |
725 |
return backend.JobQueueSetDrainFlag(drain_flag) |
726 |
|
727 |
|
728 |
# hypervisor --------------- |
729 |
|
730 |
@staticmethod |
731 |
def perspective_hypervisor_validate_params(params): |
732 |
"""Validate the hypervisor parameters. |
733 |
|
734 |
""" |
735 |
(hvname, hvparams) = params |
736 |
return backend.ValidateHVParams(hvname, hvparams) |
737 |
|
738 |
|
739 |
def ParseOptions(): |
740 |
"""Parse the command line options. |
741 |
|
742 |
@return: (options, args) as from OptionParser.parse_args() |
743 |
|
744 |
""" |
745 |
parser = OptionParser(description="Ganeti node daemon", |
746 |
usage="%prog [-f] [-d] [-b ADDRESS]", |
747 |
version="%%prog (ganeti) %s" % |
748 |
constants.RELEASE_VERSION) |
749 |
|
750 |
parser.add_option("-f", "--foreground", dest="fork", |
751 |
help="Don't detach from the current terminal", |
752 |
default=True, action="store_false") |
753 |
parser.add_option("-d", "--debug", dest="debug", |
754 |
help="Enable some debug messages", |
755 |
default=False, action="store_true") |
756 |
parser.add_option("-b", "--bind", dest="bind_address", |
757 |
help="Bind address", |
758 |
default="", metavar="ADDRESS") |
759 |
|
760 |
options, args = parser.parse_args() |
761 |
return options, args |
762 |
|
763 |
|
764 |
def main(): |
765 |
"""Main function for the node daemon. |
766 |
|
767 |
""" |
768 |
global queue_lock |
769 |
|
770 |
options, args = ParseOptions() |
771 |
utils.debug = options.debug |
772 |
|
773 |
if options.fork: |
774 |
utils.CloseFDs() |
775 |
|
776 |
for fname in (constants.SSL_CERT_FILE,): |
777 |
if not os.path.isfile(fname): |
778 |
print "config %s not there, will not run." % fname |
779 |
sys.exit(5) |
780 |
|
781 |
try: |
782 |
port = utils.GetNodeDaemonPort() |
783 |
except errors.ConfigurationError, err: |
784 |
print "Cluster configuration incomplete: '%s'" % str(err) |
785 |
sys.exit(5) |
786 |
|
787 |
dirs = [(val, constants.RUN_DIRS_MODE) for val in constants.SUB_RUN_DIRS] |
788 |
dirs.append((constants.LOG_OS_DIR, 0750)) |
789 |
dirs.append((constants.LOCK_DIR, 1777)) |
790 |
utils.EnsureDirs(dirs) |
791 |
|
792 |
# become a daemon |
793 |
if options.fork: |
794 |
utils.Daemonize(logfile=constants.LOG_NODESERVER) |
795 |
|
796 |
utils.WritePidFile(constants.NODED_PID) |
797 |
try: |
798 |
utils.SetupLogging(logfile=constants.LOG_NODESERVER, debug=options.debug, |
799 |
stderr_logging=not options.fork) |
800 |
logging.info("ganeti node daemon startup") |
801 |
|
802 |
# Read SSL certificate |
803 |
ssl_params = http.HttpSslParams(ssl_key_path=constants.SSL_CERT_FILE, |
804 |
ssl_cert_path=constants.SSL_CERT_FILE) |
805 |
|
806 |
# Prepare job queue |
807 |
queue_lock = jstore.InitAndVerifyQueue(must_lock=False) |
808 |
|
809 |
mainloop = daemon.Mainloop() |
810 |
server = NodeHttpServer(mainloop, options.bind_address, port, |
811 |
ssl_params=ssl_params, ssl_verify_peer=True) |
812 |
server.Start() |
813 |
try: |
814 |
mainloop.Run() |
815 |
finally: |
816 |
server.Stop() |
817 |
finally: |
818 |
utils.RemovePidFile(constants.NODED_PID) |
819 |
|
820 |
|
821 |
if __name__ == '__main__': |
822 |
main() |