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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 logger |
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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 ssconf |
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from ganeti import http |
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from ganeti import utils |
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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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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. |
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# TODO: Implement nonblocking locking with retries? |
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queue_lock.Exclusive(blocking=True) |
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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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return wrapper |
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|
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|
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class NodeDaemonRequestHandler(http.HTTPRequestHandler): |
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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 HandleRequest(self): |
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"""Handle a request. |
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|
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""" |
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if self.command.upper() != "PUT": |
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raise http.HTTPBadRequest() |
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|
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path = self.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 httperror.HTTPNotFound() |
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|
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try: |
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try: |
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return method(self.post_data) |
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except: |
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logging.exception("Error in RPC call") |
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raise |
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except errors.QuitGanetiException, err: |
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# Tell parent to quit |
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os.kill(self.server.noded_pid, signal.SIGTERM) |
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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.CreateBlockDevice(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.RemoveBlockDevice(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.RenameBlockDevices(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.AssembleBlockDevice(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.ShutdownBlockDevice(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.MirrorAddChildren(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.MirrorRemoveChildren(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.GetMirrorStatus(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.FindBlockDevice(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.SnapshotBlockDevice(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.GrowBlockDevice(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] |
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return backend.CloseBlockDevices(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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return backend.ExportSnapshot(disk, dest_node, instance) |
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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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einfo = backend.ExportInfo(path) |
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if einfo is None: |
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return einfo |
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return einfo.Dumps() |
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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 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, os_disk, swap_disk = params |
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inst = objects.Instance.FromDict(inst_s) |
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return backend.AddOSToInstance(inst, os_disk, swap_disk) |
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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, os_disk, swap_disk = params |
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inst = objects.Instance.FromDict(inst_s) |
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return backend.RunRenameInstance(inst, old_name, os_disk, swap_disk) |
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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, os_disk, swap_disk, src_node, src_image = params |
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inst = objects.Instance.FromDict(inst_s) |
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return backend.ImportOSIntoInstance(inst, os_disk, swap_disk, |
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src_node, src_image) |
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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.ShutdownInstance(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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extra_args = params[1] |
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return backend.StartInstance(instance, extra_args) |
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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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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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extra_args = params[2] |
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return backend.RebootInstance(instance, reboot_type, extra_args) |
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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]) |
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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() |
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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 backend.GetInstanceList() |
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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_info(params): |
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"""Query node information. |
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|
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""" |
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vgname = params[0] |
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return backend.GetNodeInfo(vgname) |
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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]) |
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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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# cluster -------------------------- |
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|
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@staticmethod |
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def perspective_version(params): |
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"""Query version information. |
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|
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""" |
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return 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. |
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|
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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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|
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# os ----------------------- |
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|
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@staticmethod |
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def perspective_os_diagnose(params): |
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"""Query detailed information about existing OSes. |
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|
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""" |
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return [os.ToDict() for os in backend.DiagnoseOS()] |
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|
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@staticmethod |
487 |
def perspective_os_get(params): |
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"""Query information about a given OS. |
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|
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""" |
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name = params[0] |
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try: |
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os_obj = backend.OSFromDisk(name) |
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except errors.InvalidOS, err: |
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os_obj = objects.OS.FromInvalidOS(err) |
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return os_obj.ToDict() |
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|
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# hooks ----------------------- |
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|
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@staticmethod |
501 |
def perspective_hooks_runner(params): |
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"""Run hook scripts. |
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|
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""" |
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hpath, phase, env = params |
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hr = backend.HooksRunner() |
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return hr.RunHooks(hpath, phase, env) |
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|
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# iallocator ----------------- |
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|
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@staticmethod |
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def perspective_iallocator_runner(params): |
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"""Run an iallocator script. |
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|
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""" |
516 |
name, idata = params |
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iar = backend.IAllocatorRunner() |
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return iar.Run(name, idata) |
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|
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# test ----------------------- |
521 |
|
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@staticmethod |
523 |
def perspective_test_delay(params): |
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"""Run test delay. |
525 |
|
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""" |
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duration = params[0] |
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return utils.TestDelay(duration) |
529 |
|
530 |
@staticmethod |
531 |
def perspective_file_storage_dir_create(params): |
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"""Create the file storage directory. |
533 |
|
534 |
""" |
535 |
file_storage_dir = params[0] |
536 |
return backend.CreateFileStorageDir(file_storage_dir) |
537 |
|
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@staticmethod |
539 |
def perspective_file_storage_dir_remove(params): |
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"""Remove the file storage directory. |
541 |
|
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""" |
543 |
file_storage_dir = params[0] |
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return backend.RemoveFileStorageDir(file_storage_dir) |
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|
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@staticmethod |
547 |
def perspective_file_storage_dir_rename(params): |
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"""Rename the file storage directory. |
549 |
|
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""" |
551 |
old_file_storage_dir = params[0] |
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new_file_storage_dir = params[1] |
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return backend.RenameFileStorageDir(old_file_storage_dir, |
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new_file_storage_dir) |
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|
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@staticmethod |
557 |
@_RequireJobQueueLock |
558 |
def perspective_jobqueue_update(params): |
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"""Update job queue. |
560 |
|
561 |
""" |
562 |
(file_name, content) = params |
563 |
return backend.JobQueueUpdate(file_name, content) |
564 |
|
565 |
@staticmethod |
566 |
def perspective_jobqueue_purge(params): |
567 |
"""Purge job queue. |
568 |
|
569 |
""" |
570 |
return backend.JobQueuePurge() |
571 |
|
572 |
@staticmethod |
573 |
@_RequireJobQueueLock |
574 |
def perspective_jobqueue_rename(params): |
575 |
"""Rename a job queue file. |
576 |
|
577 |
""" |
578 |
(old, new) = params |
579 |
|
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return backend.JobQueueRename(old, new) |
581 |
|
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|
583 |
class NodeDaemonHttpServer(http.HTTPServer): |
584 |
def __init__(self, server_address): |
585 |
http.HTTPServer.__init__(self, server_address, NodeDaemonRequestHandler) |
586 |
self.noded_pid = os.getpid() |
587 |
|
588 |
def serve_forever(self): |
589 |
"""Handle requests until told to quit.""" |
590 |
sighandler = utils.SignalHandler([signal.SIGINT, signal.SIGTERM]) |
591 |
try: |
592 |
while not sighandler.called: |
593 |
self.handle_request() |
594 |
# TODO: There could be children running at this point |
595 |
finally: |
596 |
sighandler.Reset() |
597 |
|
598 |
|
599 |
class ForkingHTTPServer(SocketServer.ForkingMixIn, NodeDaemonHttpServer): |
600 |
"""Forking HTTP Server. |
601 |
|
602 |
This inherits from ForkingMixIn and HTTPServer in order to fork for each |
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request we handle. This allows more requests to be handled concurrently. |
604 |
|
605 |
""" |
606 |
|
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|
608 |
def ParseOptions(): |
609 |
"""Parse the command line options. |
610 |
|
611 |
Returns: |
612 |
(options, args) as from OptionParser.parse_args() |
613 |
|
614 |
""" |
615 |
parser = OptionParser(description="Ganeti node daemon", |
616 |
usage="%prog [-f] [-d]", |
617 |
version="%%prog (ganeti) %s" % |
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constants.RELEASE_VERSION) |
619 |
|
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parser.add_option("-f", "--foreground", dest="fork", |
621 |
help="Don't detach from the current terminal", |
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default=True, action="store_false") |
623 |
parser.add_option("-d", "--debug", dest="debug", |
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help="Enable some debug messages", |
625 |
default=False, action="store_true") |
626 |
options, args = parser.parse_args() |
627 |
return options, args |
628 |
|
629 |
|
630 |
def main(): |
631 |
"""Main function for the node daemon. |
632 |
|
633 |
""" |
634 |
global queue_lock |
635 |
|
636 |
options, args = ParseOptions() |
637 |
utils.debug = options.debug |
638 |
for fname in (constants.SSL_CERT_FILE,): |
639 |
if not os.path.isfile(fname): |
640 |
print "config %s not there, will not run." % fname |
641 |
sys.exit(5) |
642 |
|
643 |
try: |
644 |
ss = ssconf.SimpleStore() |
645 |
port = ss.GetNodeDaemonPort() |
646 |
pwdata = ss.GetNodeDaemonPassword() |
647 |
except errors.ConfigurationError, err: |
648 |
print "Cluster configuration incomplete: '%s'" % str(err) |
649 |
sys.exit(5) |
650 |
|
651 |
# create the various SUB_RUN_DIRS, if not existing, so that we handle the |
652 |
# situation where RUN_DIR is tmpfs |
653 |
for dir_name in constants.SUB_RUN_DIRS: |
654 |
if not os.path.exists(dir_name): |
655 |
try: |
656 |
os.mkdir(dir_name, 0755) |
657 |
except EnvironmentError, err: |
658 |
if err.errno != errno.EEXIST: |
659 |
print ("Node setup wrong, cannot create directory %s: %s" % |
660 |
(dir_name, err)) |
661 |
sys.exit(5) |
662 |
if not os.path.isdir(dir_name): |
663 |
print ("Node setup wrong, %s is not a directory" % dir_name) |
664 |
sys.exit(5) |
665 |
|
666 |
# become a daemon |
667 |
if options.fork: |
668 |
utils.Daemonize(logfile=constants.LOG_NODESERVER) |
669 |
|
670 |
utils.WritePidFile(constants.NODED_PID) |
671 |
|
672 |
logger.SetupLogging(logfile=constants.LOG_NODESERVER, debug=options.debug, |
673 |
stderr_logging=not options.fork) |
674 |
logging.info("ganeti node daemon startup") |
675 |
|
676 |
# Prepare job queue |
677 |
queue_lock = jstore.InitAndVerifyQueue(must_lock=False) |
678 |
|
679 |
if options.fork: |
680 |
server = ForkingHTTPServer(('', port)) |
681 |
else: |
682 |
server = NodeDaemonHttpServer(('', port)) |
683 |
|
684 |
try: |
685 |
server.serve_forever() |
686 |
finally: |
687 |
utils.RemovePidFile(constants.NODED_PID) |
688 |
|
689 |
|
690 |
if __name__ == '__main__': |
691 |
main() |