root / lib / masterd / instance.py @ a5310c2a
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# Copyright (C) 2010 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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"""Instance-related functions and classes for masterd.
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"""
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import logging |
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import time |
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import OpenSSL |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import compat |
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from ganeti import utils |
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from ganeti import objects |
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class _ImportExportError(Exception): |
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"""Local exception to report import/export errors.
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"""
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class ImportExportTimeouts(object): |
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#: Time until daemon starts writing status file
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DEFAULT_READY_TIMEOUT = 10
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#: Length of time until errors cause hard failure
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DEFAULT_ERROR_TIMEOUT = 10
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#: Time after which daemon must be listening
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DEFAULT_LISTEN_TIMEOUT = 10
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__slots__ = [ |
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"error",
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"ready",
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"listen",
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"connect",
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] |
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def __init__(self, connect, |
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listen=DEFAULT_LISTEN_TIMEOUT, |
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error=DEFAULT_ERROR_TIMEOUT, |
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ready=DEFAULT_READY_TIMEOUT): |
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"""Initializes this class.
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@type connect: number
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@param connect: Timeout for establishing connection
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@type listen: number
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@param listen: Timeout for starting to listen for connections
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@type error: number
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@param error: Length of time until errors cause hard failure
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@type ready: number
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@param ready: Timeout for daemon to become ready
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"""
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self.error = error
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self.ready = ready
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self.listen = listen
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self.connect = connect
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class ImportExportCbBase(object): |
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"""Callbacks for disk import/export.
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"""
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def ReportListening(self, ie, private): |
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"""Called when daemon started listening.
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@type ie: Subclass of L{_DiskImportExportBase}
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@param ie: Import/export object
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@param private: Private data passed to import/export object
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"""
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def ReportConnected(self, ie, private): |
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"""Called when a connection has been established.
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@type ie: Subclass of L{_DiskImportExportBase}
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@param ie: Import/export object
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@param private: Private data passed to import/export object
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"""
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def ReportFinished(self, ie, private): |
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"""Called when a transfer has finished.
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@type ie: Subclass of L{_DiskImportExportBase}
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@param ie: Import/export object
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@param private: Private data passed to import/export object
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"""
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def _TimeoutExpired(epoch, timeout, _time_fn=time.time): |
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"""Checks whether a timeout has expired.
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"""
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return _time_fn() > (epoch + timeout)
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class _DiskImportExportBase(object): |
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MODE_TEXT = None
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def __init__(self, lu, node_name, opts, |
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instance, timeouts, cbs, private=None):
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"""Initializes this class.
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@param lu: Logical unit instance
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@type node_name: string
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@param node_name: Node name for import
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@type opts: L{objects.ImportExportOptions}
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@param opts: Import/export daemon options
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@type instance: L{objects.Instance}
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@param instance: Instance object
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@type timeouts: L{ImportExportTimeouts}
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@param timeouts: Timeouts for this import
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@type cbs: L{ImportExportCbBase}
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@param cbs: Callbacks
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@param private: Private data for callback functions
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"""
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assert self.MODE_TEXT |
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self._lu = lu
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self.node_name = node_name
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self._opts = opts
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self._instance = instance
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self._timeouts = timeouts
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self._cbs = cbs
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self._private = private
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# Parent loop
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self._loop = None |
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# Timestamps
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self._ts_begin = None |
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self._ts_connected = None |
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self._ts_finished = None |
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self._ts_cleanup = None |
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self._ts_last_error = None |
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# Transfer status
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self.success = None |
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self.final_message = None |
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# Daemon status
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self._daemon_name = None |
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self._daemon = None |
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@property
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def recent_output(self): |
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"""Returns the most recent output from the daemon.
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"""
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if self._daemon: |
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return self._daemon.recent_output |
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return None |
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@property
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def active(self): |
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"""Determines whether this transport is still active.
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"""
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return self.success is None |
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@property
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def loop(self): |
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"""Returns parent loop.
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@rtype: L{ImportExportLoop}
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"""
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return self._loop |
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def SetLoop(self, loop): |
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"""Sets the parent loop.
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@type loop: L{ImportExportLoop}
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"""
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if self._loop: |
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raise errors.ProgrammerError("Loop can only be set once") |
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self._loop = loop
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def _StartDaemon(self): |
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"""Starts the import/export daemon.
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"""
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raise NotImplementedError() |
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def CheckDaemon(self): |
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"""Checks whether daemon has been started and if not, starts it.
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@rtype: string
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@return: Daemon name
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"""
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assert self._ts_cleanup is None |
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if self._daemon_name is None: |
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assert self._ts_begin is None |
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result = self._StartDaemon()
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if result.fail_msg:
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raise _ImportExportError("Failed to start %s on %s: %s" % |
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(self.MODE_TEXT, self.node_name, |
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result.fail_msg)) |
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daemon_name = result.payload |
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logging.info("Started %s %r on %s", self.MODE_TEXT, daemon_name, |
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self.node_name)
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self._ts_begin = time.time()
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self._daemon_name = daemon_name
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return self._daemon_name |
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def GetDaemonName(self): |
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"""Returns the daemon name.
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"""
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assert self._daemon_name, "Daemon has not been started" |
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assert self._ts_cleanup is None |
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return self._daemon_name |
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def Abort(self): |
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"""Sends SIGTERM to import/export daemon (if still active).
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"""
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if self._daemon_name: |
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self._lu.LogWarning("Aborting %s %r on %s", |
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self.MODE_TEXT, self._daemon_name, self.node_name) |
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result = self._lu.rpc.call_impexp_abort(self.node_name, self._daemon_name) |
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if result.fail_msg:
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self._lu.LogWarning("Failed to abort %s %r on %s: %s", |
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self.MODE_TEXT, self._daemon_name, |
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self.node_name, result.fail_msg)
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return False |
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return True |
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def _SetDaemonData(self, data): |
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"""Internal function for updating status daemon data.
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@type data: L{objects.ImportExportStatus}
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@param data: Daemon status data
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"""
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assert self._ts_begin is not None |
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if not data: |
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if _TimeoutExpired(self._ts_begin, self._timeouts.ready): |
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raise _ImportExportError("Didn't become ready after %s seconds" % |
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self._timeouts.ready)
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return False |
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self._daemon = data
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return True |
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def SetDaemonData(self, success, data): |
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"""Updates daemon status data.
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@type success: bool
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@param success: Whether fetching data was successful or not
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@type data: L{objects.ImportExportStatus}
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@param data: Daemon status data
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"""
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if not success: |
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if self._ts_last_error is None: |
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self._ts_last_error = time.time()
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elif _TimeoutExpired(self._ts_last_error, self._timeouts.error): |
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raise _ImportExportError("Too many errors while updating data") |
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return False |
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self._ts_last_error = None |
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return self._SetDaemonData(data) |
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def CheckListening(self): |
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"""Checks whether the daemon is listening.
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"""
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raise NotImplementedError() |
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def _GetConnectedCheckEpoch(self): |
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"""Returns timeout to calculate connect timeout.
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"""
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raise NotImplementedError() |
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def CheckConnected(self): |
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"""Checks whether the daemon is connected.
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@rtype: bool
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@return: Whether the daemon is connected
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"""
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assert self._daemon, "Daemon status missing" |
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if self._ts_connected is not None: |
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return True |
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if self._daemon.connected: |
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self._ts_connected = time.time()
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# TODO: Log remote peer
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logging.debug("%s %r on %s is now connected",
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self.MODE_TEXT, self._daemon_name, self.node_name) |
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self._cbs.ReportConnected(self, self._private) |
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return True |
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if _TimeoutExpired(self._GetConnectedCheckEpoch(), self._timeouts.connect): |
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raise _ImportExportError("Not connected after %s seconds" % |
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self._timeouts.connect)
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return False |
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def CheckFinished(self): |
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"""Checks whether the daemon exited.
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@rtype: bool
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@return: Whether the transfer is finished
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"""
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assert self._daemon, "Daemon status missing" |
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if self._ts_finished: |
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return True |
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if self._daemon.exit_status is None: |
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return False |
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self._ts_finished = time.time()
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self._ReportFinished(self._daemon.exit_status == 0, |
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self._daemon.error_message)
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return True |
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def _ReportFinished(self, success, message): |
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"""Transfer is finished or daemon exited.
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@type success: bool
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@param success: Whether the transfer was successful
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@type message: string
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@param message: Error message
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"""
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assert self.success is None |
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self.success = success
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self.final_message = message
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if success:
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logging.info("%s %r on %s succeeded", self.MODE_TEXT, self._daemon_name, |
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self.node_name)
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elif self._daemon_name: |
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self._lu.LogWarning("%s %r on %s failed: %s", |
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self.MODE_TEXT, self._daemon_name, self.node_name, |
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message) |
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else:
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self._lu.LogWarning("%s on %s failed: %s", self.MODE_TEXT, |
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self.node_name, message)
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self._cbs.ReportFinished(self, self._private) |
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def _Finalize(self): |
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"""Makes the RPC call to finalize this import/export.
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"""
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return self._lu.rpc.call_impexp_cleanup(self.node_name, self._daemon_name) |
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def Finalize(self, error=None): |
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"""Finalizes this import/export.
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"""
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assert error or self.success is not None |
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if self._daemon_name: |
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logging.info("Finalizing %s %r on %s",
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self.MODE_TEXT, self._daemon_name, self.node_name) |
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result = self._Finalize()
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if result.fail_msg:
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self._lu.LogWarning("Failed to finalize %s %r on %s: %s", |
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self.MODE_TEXT, self._daemon_name, |
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self.node_name, result.fail_msg)
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return False |
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# Daemon is no longer running
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self._daemon_name = None |
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self._ts_cleanup = time.time()
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if error:
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self._ReportFinished(False, error) |
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return True |
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class DiskImport(_DiskImportExportBase): |
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MODE_TEXT = "import"
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def __init__(self, lu, node_name, opts, instance, |
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dest, dest_args, timeouts, cbs, private=None):
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"""Initializes this class.
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@param lu: Logical unit instance
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@type node_name: string
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@param node_name: Node name for import
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@type opts: L{objects.ImportExportOptions}
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@param opts: Import/export daemon options
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@type instance: L{objects.Instance}
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@param instance: Instance object
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@param dest: I/O destination
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@param dest_args: I/O arguments
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@type timeouts: L{ImportExportTimeouts}
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@param timeouts: Timeouts for this import
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@type cbs: L{ImportExportCbBase}
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@param cbs: Callbacks
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@param private: Private data for callback functions
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"""
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_DiskImportExportBase.__init__(self, lu, node_name, opts,
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instance, timeouts, cbs, private) |
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self._dest = dest
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self._dest_args = dest_args
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# Timestamps
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self._ts_listening = None |
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@property
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def listen_port(self): |
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"""Returns the port the daemon is listening on.
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"""
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if self._daemon: |
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return self._daemon.listen_port |
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return None |
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def _StartDaemon(self): |
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"""Starts the import daemon.
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"""
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return self._lu.rpc.call_import_start(self.node_name, self._opts, |
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self._instance,
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self._dest, self._dest_args) |
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def CheckListening(self): |
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"""Checks whether the daemon is listening.
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@rtype: bool
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@return: Whether the daemon is listening
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"""
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assert self._daemon, "Daemon status missing" |
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if self._ts_listening is not None: |
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return True |
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port = self._daemon.listen_port
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if port is not None: |
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self._ts_listening = time.time()
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logging.debug("Import %r on %s is now listening on port %s",
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self._daemon_name, self.node_name, port) |
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self._cbs.ReportListening(self, self._private) |
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return True |
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if _TimeoutExpired(self._ts_begin, self._timeouts.listen): |
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raise _ImportExportError("Not listening after %s seconds" % |
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self._timeouts.listen)
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return False |
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def _GetConnectedCheckEpoch(self): |
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"""Returns the time since we started listening.
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"""
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assert self._ts_listening is not None, \ |
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("Checking whether an import is connected is only useful"
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" once it's been listening")
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return self._ts_listening |
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|
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class DiskExport(_DiskImportExportBase): |
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MODE_TEXT = "export"
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def __init__(self, lu, node_name, opts, |
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dest_host, dest_port, instance, source, source_args, |
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timeouts, cbs, private=None):
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"""Initializes this class.
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526 |
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@param lu: Logical unit instance
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@type node_name: string
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@param node_name: Node name for import
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@type opts: L{objects.ImportExportOptions}
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@param opts: Import/export daemon options
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@type dest_host: string
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@param dest_host: Destination host name or IP address
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@type dest_port: number
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@param dest_port: Destination port number
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@type instance: L{objects.Instance}
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@param instance: Instance object
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@param source: I/O source
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@param source_args: I/O source
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@type timeouts: L{ImportExportTimeouts}
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@param timeouts: Timeouts for this import
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@type cbs: L{ImportExportCbBase}
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@param cbs: Callbacks
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@param private: Private data for callback functions
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"""
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_DiskImportExportBase.__init__(self, lu, node_name, opts,
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instance, timeouts, cbs, private) |
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self._dest_host = dest_host
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self._dest_port = dest_port
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self._source = source
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self._source_args = source_args
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|
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def _StartDaemon(self): |
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"""Starts the export daemon.
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556 |
|
557 |
"""
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return self._lu.rpc.call_export_start(self.node_name, self._opts, |
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self._dest_host, self._dest_port, |
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self._instance, self._source, |
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self._source_args)
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|
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def CheckListening(self): |
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"""Checks whether the daemon is listening.
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565 |
|
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"""
|
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# Only an import can be listening
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return True |
569 |
|
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def _GetConnectedCheckEpoch(self): |
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"""Returns the time since the daemon started.
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572 |
|
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"""
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assert self._ts_begin is not None |
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return self._ts_begin |
577 |
|
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|
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class ImportExportLoop: |
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MIN_DELAY = 1.0
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MAX_DELAY = 20.0
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|
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def __init__(self, lu): |
584 |
"""Initializes this class.
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585 |
|
586 |
"""
|
587 |
self._lu = lu
|
588 |
self._queue = []
|
589 |
self._pending_add = []
|
590 |
|
591 |
def Add(self, diskie): |
592 |
"""Adds an import/export object to the loop.
|
593 |
|
594 |
@type diskie: Subclass of L{_DiskImportExportBase}
|
595 |
@param diskie: Import/export object
|
596 |
|
597 |
"""
|
598 |
assert diskie not in self._pending_add |
599 |
assert diskie.loop is None |
600 |
|
601 |
diskie.SetLoop(self)
|
602 |
|
603 |
# Adding new objects to a staging list is necessary, otherwise the main
|
604 |
# loop gets confused if callbacks modify the queue while the main loop is
|
605 |
# iterating over it.
|
606 |
self._pending_add.append(diskie)
|
607 |
|
608 |
@staticmethod
|
609 |
def _CollectDaemonStatus(lu, daemons): |
610 |
"""Collects the status for all import/export daemons.
|
611 |
|
612 |
"""
|
613 |
daemon_status = {} |
614 |
|
615 |
for node_name, names in daemons.iteritems(): |
616 |
result = lu.rpc.call_impexp_status(node_name, names) |
617 |
if result.fail_msg:
|
618 |
lu.LogWarning("Failed to get daemon status on %s: %s",
|
619 |
node_name, result.fail_msg) |
620 |
continue
|
621 |
|
622 |
assert len(names) == len(result.payload) |
623 |
|
624 |
daemon_status[node_name] = dict(zip(names, result.payload)) |
625 |
|
626 |
return daemon_status
|
627 |
|
628 |
@staticmethod
|
629 |
def _GetActiveDaemonNames(queue): |
630 |
"""Gets the names of all active daemons.
|
631 |
|
632 |
"""
|
633 |
result = {} |
634 |
for diskie in queue: |
635 |
if not diskie.active: |
636 |
continue
|
637 |
|
638 |
try:
|
639 |
# Start daemon if necessary
|
640 |
daemon_name = diskie.CheckDaemon() |
641 |
except _ImportExportError, err:
|
642 |
logging.exception("%s failed", diskie.MODE_TEXT)
|
643 |
diskie.Finalize(error=str(err))
|
644 |
continue
|
645 |
|
646 |
result.setdefault(diskie.node_name, []).append(daemon_name) |
647 |
|
648 |
assert len(queue) >= len(result) |
649 |
assert len(queue) >= sum([len(names) for names in result.itervalues()]) |
650 |
|
651 |
logging.debug("daemons=%r", result)
|
652 |
|
653 |
return result
|
654 |
|
655 |
def _AddPendingToQueue(self): |
656 |
"""Adds all pending import/export objects to the internal queue.
|
657 |
|
658 |
"""
|
659 |
assert compat.all(diskie not in self._queue and diskie.loop == self |
660 |
for diskie in self._pending_add) |
661 |
|
662 |
self._queue.extend(self._pending_add) |
663 |
|
664 |
del self._pending_add[:] |
665 |
|
666 |
def Run(self): |
667 |
"""Utility main loop.
|
668 |
|
669 |
"""
|
670 |
while True: |
671 |
self._AddPendingToQueue()
|
672 |
|
673 |
# Collect all active daemon names
|
674 |
daemons = self._GetActiveDaemonNames(self._queue) |
675 |
if not daemons: |
676 |
break
|
677 |
|
678 |
# Collection daemon status data
|
679 |
data = self._CollectDaemonStatus(self._lu, daemons) |
680 |
|
681 |
# Use data
|
682 |
delay = self.MAX_DELAY
|
683 |
for diskie in self._queue: |
684 |
if not diskie.active: |
685 |
continue
|
686 |
|
687 |
try:
|
688 |
try:
|
689 |
all_daemon_data = data[diskie.node_name] |
690 |
except KeyError: |
691 |
result = diskie.SetDaemonData(False, None) |
692 |
else:
|
693 |
result = \ |
694 |
diskie.SetDaemonData(True,
|
695 |
all_daemon_data[diskie.GetDaemonName()]) |
696 |
|
697 |
if not result: |
698 |
# Daemon not yet ready, retry soon
|
699 |
delay = min(3.0, delay) |
700 |
continue
|
701 |
|
702 |
if diskie.CheckFinished():
|
703 |
# Transfer finished
|
704 |
diskie.Finalize() |
705 |
continue
|
706 |
|
707 |
# Normal case: check again in 5 seconds
|
708 |
delay = min(5.0, delay) |
709 |
|
710 |
if not diskie.CheckListening(): |
711 |
# Not yet listening, retry soon
|
712 |
delay = min(1.0, delay) |
713 |
continue
|
714 |
|
715 |
if not diskie.CheckConnected(): |
716 |
# Not yet connected, retry soon
|
717 |
delay = min(1.0, delay) |
718 |
continue
|
719 |
|
720 |
except _ImportExportError, err:
|
721 |
logging.exception("%s failed", diskie.MODE_TEXT)
|
722 |
diskie.Finalize(error=str(err))
|
723 |
|
724 |
if not compat.any([diskie.active for diskie in self._queue]): |
725 |
break
|
726 |
|
727 |
# Wait a bit
|
728 |
delay = min(self.MAX_DELAY, max(self.MIN_DELAY, delay)) |
729 |
logging.debug("Waiting for %ss", delay)
|
730 |
time.sleep(delay) |
731 |
|
732 |
def FinalizeAll(self): |
733 |
"""Finalizes all pending transfers.
|
734 |
|
735 |
"""
|
736 |
success = True
|
737 |
|
738 |
for diskie in self._queue: |
739 |
success = diskie.Finalize() and success
|
740 |
|
741 |
return success
|
742 |
|
743 |
|
744 |
class _TransferInstCbBase(ImportExportCbBase): |
745 |
def __init__(self, lu, feedback_fn, instance, timeouts, src_node, src_cbs, |
746 |
dest_node, dest_ip, export_opts): |
747 |
"""Initializes this class.
|
748 |
|
749 |
"""
|
750 |
ImportExportCbBase.__init__(self)
|
751 |
|
752 |
self.lu = lu
|
753 |
self.feedback_fn = feedback_fn
|
754 |
self.instance = instance
|
755 |
self.timeouts = timeouts
|
756 |
self.src_node = src_node
|
757 |
self.src_cbs = src_cbs
|
758 |
self.dest_node = dest_node
|
759 |
self.dest_ip = dest_ip
|
760 |
self.export_opts = export_opts
|
761 |
|
762 |
|
763 |
class _TransferInstSourceCb(_TransferInstCbBase): |
764 |
def ReportConnected(self, ie, dtp): |
765 |
"""Called when a connection has been established.
|
766 |
|
767 |
"""
|
768 |
assert self.src_cbs is None |
769 |
assert dtp.src_export == ie
|
770 |
assert dtp.dest_import
|
771 |
|
772 |
self.feedback_fn("%s is sending data on %s" % |
773 |
(dtp.data.name, ie.node_name)) |
774 |
|
775 |
def ReportFinished(self, ie, dtp): |
776 |
"""Called when a transfer has finished.
|
777 |
|
778 |
"""
|
779 |
assert self.src_cbs is None |
780 |
assert dtp.src_export == ie
|
781 |
assert dtp.dest_import
|
782 |
|
783 |
if ie.success:
|
784 |
self.feedback_fn("%s finished sending data" % dtp.data.name) |
785 |
else:
|
786 |
self.feedback_fn("%s failed to send data: %s (recent output: %r)" % |
787 |
(dtp.data.name, ie.final_message, ie.recent_output)) |
788 |
|
789 |
dtp.RecordResult(ie.success) |
790 |
|
791 |
cb = dtp.data.finished_fn |
792 |
if cb:
|
793 |
cb() |
794 |
|
795 |
# TODO: Check whether sending SIGTERM right away is okay, maybe we should
|
796 |
# give the daemon a moment to sort things out
|
797 |
if dtp.dest_import and not ie.success: |
798 |
dtp.dest_import.Abort() |
799 |
|
800 |
|
801 |
class _TransferInstDestCb(_TransferInstCbBase): |
802 |
def ReportListening(self, ie, dtp): |
803 |
"""Called when daemon started listening.
|
804 |
|
805 |
"""
|
806 |
assert self.src_cbs |
807 |
assert dtp.src_export is None |
808 |
assert dtp.dest_import
|
809 |
|
810 |
self.feedback_fn("%s is now listening, starting export" % dtp.data.name) |
811 |
|
812 |
# Start export on source node
|
813 |
de = DiskExport(self.lu, self.src_node, self.export_opts, |
814 |
self.dest_ip, ie.listen_port,
|
815 |
self.instance, dtp.data.src_io, dtp.data.src_ioargs,
|
816 |
self.timeouts, self.src_cbs, private=dtp) |
817 |
ie.loop.Add(de) |
818 |
|
819 |
dtp.src_export = de |
820 |
|
821 |
def ReportConnected(self, ie, dtp): |
822 |
"""Called when a connection has been established.
|
823 |
|
824 |
"""
|
825 |
self.feedback_fn("%s is receiving data on %s" % |
826 |
(dtp.data.name, self.dest_node))
|
827 |
|
828 |
def ReportFinished(self, ie, dtp): |
829 |
"""Called when a transfer has finished.
|
830 |
|
831 |
"""
|
832 |
if ie.success:
|
833 |
self.feedback_fn("%s finished receiving data" % dtp.data.name) |
834 |
else:
|
835 |
self.feedback_fn("%s failed to receive data: %s (recent output: %r)" % |
836 |
(dtp.data.name, ie.final_message, ie.recent_output)) |
837 |
|
838 |
dtp.RecordResult(ie.success) |
839 |
|
840 |
# TODO: Check whether sending SIGTERM right away is okay, maybe we should
|
841 |
# give the daemon a moment to sort things out
|
842 |
if dtp.src_export and not ie.success: |
843 |
dtp.src_export.Abort() |
844 |
|
845 |
|
846 |
class DiskTransfer(object): |
847 |
def __init__(self, name, src_io, src_ioargs, dest_io, dest_ioargs, |
848 |
finished_fn): |
849 |
"""Initializes this class.
|
850 |
|
851 |
@type name: string
|
852 |
@param name: User-visible name for this transfer (e.g. "disk/0")
|
853 |
@param src_io: Source I/O type
|
854 |
@param src_ioargs: Source I/O arguments
|
855 |
@param dest_io: Destination I/O type
|
856 |
@param dest_ioargs: Destination I/O arguments
|
857 |
@type finished_fn: callable
|
858 |
@param finished_fn: Function called once transfer has finished
|
859 |
|
860 |
"""
|
861 |
self.name = name
|
862 |
|
863 |
self.src_io = src_io
|
864 |
self.src_ioargs = src_ioargs
|
865 |
|
866 |
self.dest_io = dest_io
|
867 |
self.dest_ioargs = dest_ioargs
|
868 |
|
869 |
self.finished_fn = finished_fn
|
870 |
|
871 |
|
872 |
class _DiskTransferPrivate(object): |
873 |
def __init__(self, data, success): |
874 |
"""Initializes this class.
|
875 |
|
876 |
@type data: L{DiskTransfer}
|
877 |
@type success: bool
|
878 |
|
879 |
"""
|
880 |
self.data = data
|
881 |
|
882 |
self.src_export = None |
883 |
self.dest_import = None |
884 |
|
885 |
self.success = success
|
886 |
|
887 |
def RecordResult(self, success): |
888 |
"""Updates the status.
|
889 |
|
890 |
One failed part will cause the whole transfer to fail.
|
891 |
|
892 |
"""
|
893 |
self.success = self.success and success |
894 |
|
895 |
|
896 |
def TransferInstanceData(lu, feedback_fn, src_node, dest_node, dest_ip, |
897 |
instance, all_transfers): |
898 |
"""Transfers an instance's data from one node to another.
|
899 |
|
900 |
@param lu: Logical unit instance
|
901 |
@param feedback_fn: Feedback function
|
902 |
@type src_node: string
|
903 |
@param src_node: Source node name
|
904 |
@type dest_node: string
|
905 |
@param dest_node: Destination node name
|
906 |
@type dest_ip: string
|
907 |
@param dest_ip: IP address of destination node
|
908 |
@type instance: L{objects.Instance}
|
909 |
@param instance: Instance object
|
910 |
@type all_transfers: list of L{DiskTransfer} instances
|
911 |
@param all_transfers: List of all disk transfers to be made
|
912 |
@rtype: list
|
913 |
@return: List with a boolean (True=successful, False=failed) for success for
|
914 |
each transfer
|
915 |
|
916 |
"""
|
917 |
# Compress only if transfer is to another node
|
918 |
if src_node == dest_node:
|
919 |
compress = constants.IEC_NONE |
920 |
else:
|
921 |
compress = constants.IEC_GZIP |
922 |
|
923 |
logging.debug("Source node %s, destination node %s, compression '%s'",
|
924 |
src_node, dest_node, compress) |
925 |
|
926 |
opts = objects.ImportExportOptions(key_name=None, ca_pem=None, |
927 |
compress=compress) |
928 |
|
929 |
timeouts = ImportExportTimeouts(constants.DISK_TRANSFER_CONNECT_TIMEOUT) |
930 |
src_cbs = _TransferInstSourceCb(lu, feedback_fn, instance, timeouts, |
931 |
src_node, None, dest_node, dest_ip, opts)
|
932 |
dest_cbs = _TransferInstDestCb(lu, feedback_fn, instance, timeouts, |
933 |
src_node, src_cbs, dest_node, dest_ip, opts) |
934 |
|
935 |
all_dtp = [] |
936 |
|
937 |
ieloop = ImportExportLoop(lu) |
938 |
try:
|
939 |
for transfer in all_transfers: |
940 |
if transfer:
|
941 |
feedback_fn("Exporting %s from %s to %s" %
|
942 |
(transfer.name, src_node, dest_node)) |
943 |
|
944 |
dtp = _DiskTransferPrivate(transfer, True)
|
945 |
|
946 |
di = DiskImport(lu, dest_node, opts, instance, |
947 |
transfer.dest_io, transfer.dest_ioargs, |
948 |
timeouts, dest_cbs, private=dtp) |
949 |
ieloop.Add(di) |
950 |
|
951 |
dtp.dest_import = di |
952 |
else:
|
953 |
dtp = _DiskTransferPrivate(None, False) |
954 |
|
955 |
all_dtp.append(dtp) |
956 |
|
957 |
ieloop.Run() |
958 |
finally:
|
959 |
ieloop.FinalizeAll() |
960 |
|
961 |
assert len(all_dtp) == len(all_transfers) |
962 |
assert compat.all([(dtp.src_export is None or |
963 |
dtp.src_export.success is not None) and |
964 |
(dtp.dest_import is None or |
965 |
dtp.dest_import.success is not None) |
966 |
for dtp in all_dtp]), \ |
967 |
"Not all imports/exports are finalized"
|
968 |
|
969 |
return [bool(dtp.success) for dtp in all_dtp] |
970 |
|
971 |
|
972 |
class _RemoteExportCb(ImportExportCbBase): |
973 |
def __init__(self, feedback_fn, disk_count): |
974 |
"""Initializes this class.
|
975 |
|
976 |
"""
|
977 |
ImportExportCbBase.__init__(self)
|
978 |
self._feedback_fn = feedback_fn
|
979 |
self._dresults = [None] * disk_count |
980 |
|
981 |
@property
|
982 |
def disk_results(self): |
983 |
"""Returns per-disk results.
|
984 |
|
985 |
"""
|
986 |
return self._dresults |
987 |
|
988 |
def ReportConnected(self, ie, private): |
989 |
"""Called when a connection has been established.
|
990 |
|
991 |
"""
|
992 |
(idx, _) = private |
993 |
|
994 |
self._feedback_fn("Disk %s is now sending data" % idx) |
995 |
|
996 |
def ReportFinished(self, ie, private): |
997 |
"""Called when a transfer has finished.
|
998 |
|
999 |
"""
|
1000 |
(idx, finished_fn) = private |
1001 |
|
1002 |
if ie.success:
|
1003 |
self._feedback_fn("Disk %s finished sending data" % idx) |
1004 |
else:
|
1005 |
self._feedback_fn("Disk %s failed to send data: %s (recent output: %r)" % |
1006 |
(idx, ie.final_message, ie.recent_output)) |
1007 |
|
1008 |
self._dresults[idx] = bool(ie.success) |
1009 |
|
1010 |
if finished_fn:
|
1011 |
finished_fn() |
1012 |
|
1013 |
|
1014 |
class ExportInstanceHelper: |
1015 |
def __init__(self, lu, feedback_fn, instance): |
1016 |
"""Initializes this class.
|
1017 |
|
1018 |
@param lu: Logical unit instance
|
1019 |
@param feedback_fn: Feedback function
|
1020 |
@type instance: L{objects.Instance}
|
1021 |
@param instance: Instance object
|
1022 |
|
1023 |
"""
|
1024 |
self._lu = lu
|
1025 |
self._feedback_fn = feedback_fn
|
1026 |
self._instance = instance
|
1027 |
|
1028 |
self._snap_disks = []
|
1029 |
self._removed_snaps = [False] * len(instance.disks) |
1030 |
|
1031 |
def CreateSnapshots(self): |
1032 |
"""Creates an LVM snapshot for every disk of the instance.
|
1033 |
|
1034 |
"""
|
1035 |
assert not self._snap_disks |
1036 |
|
1037 |
instance = self._instance
|
1038 |
src_node = instance.primary_node |
1039 |
|
1040 |
vgname = self._lu.cfg.GetVGName()
|
1041 |
|
1042 |
for idx, disk in enumerate(instance.disks): |
1043 |
self._feedback_fn("Creating a snapshot of disk/%s on node %s" % |
1044 |
(idx, src_node)) |
1045 |
|
1046 |
# result.payload will be a snapshot of an lvm leaf of the one we
|
1047 |
# passed
|
1048 |
result = self._lu.rpc.call_blockdev_snapshot(src_node, disk)
|
1049 |
msg = result.fail_msg |
1050 |
if msg:
|
1051 |
self._lu.LogWarning("Could not snapshot disk/%s on node %s: %s", |
1052 |
idx, src_node, msg) |
1053 |
new_dev = False
|
1054 |
else:
|
1055 |
disk_id = (vgname, result.payload) |
1056 |
new_dev = objects.Disk(dev_type=constants.LD_LV, size=disk.size, |
1057 |
logical_id=disk_id, physical_id=disk_id, |
1058 |
iv_name=disk.iv_name) |
1059 |
|
1060 |
self._snap_disks.append(new_dev)
|
1061 |
|
1062 |
assert len(self._snap_disks) == len(instance.disks) |
1063 |
assert len(self._removed_snaps) == len(instance.disks) |
1064 |
|
1065 |
def _RemoveSnapshot(self, disk_index): |
1066 |
"""Removes an LVM snapshot.
|
1067 |
|
1068 |
@type disk_index: number
|
1069 |
@param disk_index: Index of the snapshot to be removed
|
1070 |
|
1071 |
"""
|
1072 |
disk = self._snap_disks[disk_index]
|
1073 |
if disk and not self._removed_snaps[disk_index]: |
1074 |
src_node = self._instance.primary_node
|
1075 |
|
1076 |
self._feedback_fn("Removing snapshot of disk/%s on node %s" % |
1077 |
(disk_index, src_node)) |
1078 |
|
1079 |
result = self._lu.rpc.call_blockdev_remove(src_node, disk)
|
1080 |
if result.fail_msg:
|
1081 |
self._lu.LogWarning("Could not remove snapshot for disk/%d from node" |
1082 |
" %s: %s", disk_index, src_node, result.fail_msg)
|
1083 |
else:
|
1084 |
self._removed_snaps[disk_index] = True |
1085 |
|
1086 |
def LocalExport(self, dest_node): |
1087 |
"""Intra-cluster instance export.
|
1088 |
|
1089 |
@type dest_node: L{objects.Node}
|
1090 |
@param dest_node: Destination node
|
1091 |
|
1092 |
"""
|
1093 |
instance = self._instance
|
1094 |
src_node = instance.primary_node |
1095 |
|
1096 |
assert len(self._snap_disks) == len(instance.disks) |
1097 |
|
1098 |
transfers = [] |
1099 |
|
1100 |
for idx, dev in enumerate(self._snap_disks): |
1101 |
if not dev: |
1102 |
transfers.append(None)
|
1103 |
continue
|
1104 |
|
1105 |
path = utils.PathJoin(constants.EXPORT_DIR, "%s.new" % instance.name,
|
1106 |
dev.physical_id[1])
|
1107 |
|
1108 |
finished_fn = compat.partial(self._TransferFinished, idx)
|
1109 |
|
1110 |
# FIXME: pass debug option from opcode to backend
|
1111 |
dt = DiskTransfer("snapshot/%s" % idx,
|
1112 |
constants.IEIO_SCRIPT, (dev, idx), |
1113 |
constants.IEIO_FILE, (path, ), |
1114 |
finished_fn) |
1115 |
transfers.append(dt) |
1116 |
|
1117 |
# Actually export data
|
1118 |
dresults = TransferInstanceData(self._lu, self._feedback_fn, |
1119 |
src_node, dest_node.name, |
1120 |
dest_node.secondary_ip, |
1121 |
instance, transfers) |
1122 |
|
1123 |
assert len(dresults) == len(instance.disks) |
1124 |
|
1125 |
self._feedback_fn("Finalizing export on %s" % dest_node.name) |
1126 |
result = self._lu.rpc.call_finalize_export(dest_node.name, instance,
|
1127 |
self._snap_disks)
|
1128 |
msg = result.fail_msg |
1129 |
fin_resu = not msg
|
1130 |
if msg:
|
1131 |
self._lu.LogWarning("Could not finalize export for instance %s" |
1132 |
" on node %s: %s", instance.name, dest_node.name, msg)
|
1133 |
|
1134 |
return (fin_resu, dresults)
|
1135 |
|
1136 |
def RemoteExport(self, opts, disk_info, timeouts): |
1137 |
"""Inter-cluster instance export.
|
1138 |
|
1139 |
@type opts: L{objects.ImportExportOptions}
|
1140 |
@param opts: Import/export daemon options
|
1141 |
@type disk_info: list
|
1142 |
@param disk_info: Per-disk destination information
|
1143 |
@type timeouts: L{ImportExportTimeouts}
|
1144 |
@param timeouts: Timeouts for this import
|
1145 |
|
1146 |
"""
|
1147 |
instance = self._instance
|
1148 |
|
1149 |
assert len(disk_info) == len(instance.disks) |
1150 |
|
1151 |
cbs = _RemoteExportCb(self._feedback_fn, len(instance.disks)) |
1152 |
|
1153 |
ieloop = ImportExportLoop(self._lu)
|
1154 |
try:
|
1155 |
for idx, (dev, (host, port, _, _)) in enumerate(zip(instance.disks, |
1156 |
disk_info)): |
1157 |
self._feedback_fn("Sending disk %s to %s:%s" % (idx, host, port)) |
1158 |
finished_fn = compat.partial(self._TransferFinished, idx)
|
1159 |
ieloop.Add(DiskExport(self._lu, instance.primary_node,
|
1160 |
opts, host, port, instance, |
1161 |
constants.IEIO_SCRIPT, (dev, idx), |
1162 |
timeouts, cbs, private=(idx, finished_fn))) |
1163 |
|
1164 |
ieloop.Run() |
1165 |
finally:
|
1166 |
ieloop.FinalizeAll() |
1167 |
|
1168 |
return (True, cbs.disk_results) |
1169 |
|
1170 |
def _TransferFinished(self, idx): |
1171 |
"""Called once a transfer has finished.
|
1172 |
|
1173 |
@type idx: number
|
1174 |
@param idx: Disk index
|
1175 |
|
1176 |
"""
|
1177 |
logging.debug("Transfer %s finished", idx)
|
1178 |
self._RemoveSnapshot(idx)
|
1179 |
|
1180 |
def Cleanup(self): |
1181 |
"""Remove all snapshots.
|
1182 |
|
1183 |
"""
|
1184 |
assert len(self._removed_snaps) == len(self._instance.disks) |
1185 |
for idx in range(len(self._instance.disks)): |
1186 |
self._RemoveSnapshot(idx)
|
1187 |
|
1188 |
|
1189 |
class _RemoteImportCb(ImportExportCbBase): |
1190 |
def __init__(self, feedback_fn, cds, x509_cert_pem, disk_count, |
1191 |
external_address): |
1192 |
"""Initializes this class.
|
1193 |
|
1194 |
@type cds: string
|
1195 |
@param cds: Cluster domain secret
|
1196 |
@type x509_cert_pem: string
|
1197 |
@param x509_cert_pem: CA used for signing import key
|
1198 |
@type disk_count: number
|
1199 |
@param disk_count: Number of disks
|
1200 |
@type external_address: string
|
1201 |
@param external_address: External address of destination node
|
1202 |
|
1203 |
"""
|
1204 |
ImportExportCbBase.__init__(self)
|
1205 |
self._feedback_fn = feedback_fn
|
1206 |
self._cds = cds
|
1207 |
self._x509_cert_pem = x509_cert_pem
|
1208 |
self._disk_count = disk_count
|
1209 |
self._external_address = external_address
|
1210 |
|
1211 |
self._dresults = [None] * disk_count |
1212 |
self._daemon_port = [None] * disk_count |
1213 |
|
1214 |
self._salt = utils.GenerateSecret(8) |
1215 |
|
1216 |
@property
|
1217 |
def disk_results(self): |
1218 |
"""Returns per-disk results.
|
1219 |
|
1220 |
"""
|
1221 |
return self._dresults |
1222 |
|
1223 |
def _CheckAllListening(self): |
1224 |
"""Checks whether all daemons are listening.
|
1225 |
|
1226 |
If all daemons are listening, the information is sent to the client.
|
1227 |
|
1228 |
"""
|
1229 |
if not compat.all(dp is not None for dp in self._daemon_port): |
1230 |
return
|
1231 |
|
1232 |
host = self._external_address
|
1233 |
|
1234 |
disks = [] |
1235 |
for idx, port in enumerate(self._daemon_port): |
1236 |
disks.append(ComputeRemoteImportDiskInfo(self._cds, self._salt, |
1237 |
idx, host, port)) |
1238 |
|
1239 |
assert len(disks) == self._disk_count |
1240 |
|
1241 |
self._feedback_fn(constants.ELOG_REMOTE_IMPORT, {
|
1242 |
"disks": disks,
|
1243 |
"x509_ca": self._x509_cert_pem, |
1244 |
}) |
1245 |
|
1246 |
def ReportListening(self, ie, private): |
1247 |
"""Called when daemon started listening.
|
1248 |
|
1249 |
"""
|
1250 |
(idx, ) = private |
1251 |
|
1252 |
self._feedback_fn("Disk %s is now listening" % idx) |
1253 |
|
1254 |
assert self._daemon_port[idx] is None |
1255 |
|
1256 |
self._daemon_port[idx] = ie.listen_port
|
1257 |
|
1258 |
self._CheckAllListening()
|
1259 |
|
1260 |
def ReportConnected(self, ie, private): |
1261 |
"""Called when a connection has been established.
|
1262 |
|
1263 |
"""
|
1264 |
(idx, ) = private |
1265 |
|
1266 |
self._feedback_fn("Disk %s is now receiving data" % idx) |
1267 |
|
1268 |
def ReportFinished(self, ie, private): |
1269 |
"""Called when a transfer has finished.
|
1270 |
|
1271 |
"""
|
1272 |
(idx, ) = private |
1273 |
|
1274 |
# Daemon is certainly no longer listening
|
1275 |
self._daemon_port[idx] = None |
1276 |
|
1277 |
if ie.success:
|
1278 |
self._feedback_fn("Disk %s finished receiving data" % idx) |
1279 |
else:
|
1280 |
self._feedback_fn(("Disk %s failed to receive data: %s" |
1281 |
" (recent output: %r)") %
|
1282 |
(idx, ie.final_message, ie.recent_output)) |
1283 |
|
1284 |
self._dresults[idx] = bool(ie.success) |
1285 |
|
1286 |
|
1287 |
def RemoteImport(lu, feedback_fn, instance, source_x509_ca, cds, timeouts): |
1288 |
"""Imports an instance from another cluster.
|
1289 |
|
1290 |
@param lu: Logical unit instance
|
1291 |
@param feedback_fn: Feedback function
|
1292 |
@type instance: L{objects.Instance}
|
1293 |
@param instance: Instance object
|
1294 |
@type source_x509_ca: OpenSSL.crypto.X509
|
1295 |
@param source_x509_ca: Import source's X509 CA
|
1296 |
@type cds: string
|
1297 |
@param cds: Cluster domain secret
|
1298 |
@type timeouts: L{ImportExportTimeouts}
|
1299 |
@param timeouts: Timeouts for this import
|
1300 |
|
1301 |
"""
|
1302 |
source_ca_pem = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, |
1303 |
source_x509_ca) |
1304 |
|
1305 |
# Create crypto key
|
1306 |
result = lu.rpc.call_x509_cert_create(instance.primary_node, |
1307 |
constants.RIE_CERT_VALIDITY) |
1308 |
result.Raise("Can't create X509 key and certificate on %s" % result.node)
|
1309 |
|
1310 |
(x509_key_name, x509_cert_pem) = result.payload |
1311 |
try:
|
1312 |
# Load certificate
|
1313 |
x509_cert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, |
1314 |
x509_cert_pem) |
1315 |
|
1316 |
# Import daemon options
|
1317 |
opts = objects.ImportExportOptions(key_name=x509_key_name, |
1318 |
ca_pem=source_ca_pem) |
1319 |
|
1320 |
# Sign certificate
|
1321 |
signed_x509_cert_pem = \ |
1322 |
utils.SignX509Certificate(x509_cert, cds, utils.GenerateSecret(8))
|
1323 |
|
1324 |
cbs = _RemoteImportCb(feedback_fn, cds, signed_x509_cert_pem, |
1325 |
len(instance.disks), instance.primary_node)
|
1326 |
|
1327 |
ieloop = ImportExportLoop(lu) |
1328 |
try:
|
1329 |
for idx, dev in enumerate(instance.disks): |
1330 |
ieloop.Add(DiskImport(lu, instance.primary_node, opts, instance, |
1331 |
constants.IEIO_SCRIPT, (dev, idx), |
1332 |
timeouts, cbs, private=(idx, ))) |
1333 |
|
1334 |
ieloop.Run() |
1335 |
finally:
|
1336 |
ieloop.FinalizeAll() |
1337 |
finally:
|
1338 |
# Remove crypto key and certificate
|
1339 |
result = lu.rpc.call_x509_cert_remove(instance.primary_node, x509_key_name) |
1340 |
result.Raise("Can't remove X509 key and certificate on %s" % result.node)
|
1341 |
|
1342 |
return cbs.disk_results
|
1343 |
|
1344 |
|
1345 |
def _GetImportExportHandshakeMessage(version): |
1346 |
"""Returns the handshake message for a RIE protocol version.
|
1347 |
|
1348 |
@type version: number
|
1349 |
|
1350 |
"""
|
1351 |
return "%s:%s" % (version, constants.RIE_HANDSHAKE) |
1352 |
|
1353 |
|
1354 |
def ComputeRemoteExportHandshake(cds): |
1355 |
"""Computes the remote import/export handshake.
|
1356 |
|
1357 |
@type cds: string
|
1358 |
@param cds: Cluster domain secret
|
1359 |
|
1360 |
"""
|
1361 |
salt = utils.GenerateSecret(8)
|
1362 |
msg = _GetImportExportHandshakeMessage(constants.RIE_VERSION) |
1363 |
return (constants.RIE_VERSION, utils.Sha1Hmac(cds, msg, salt=salt), salt)
|
1364 |
|
1365 |
|
1366 |
def CheckRemoteExportHandshake(cds, handshake): |
1367 |
"""Checks the handshake of a remote import/export.
|
1368 |
|
1369 |
@type cds: string
|
1370 |
@param cds: Cluster domain secret
|
1371 |
@type handshake: sequence
|
1372 |
@param handshake: Handshake sent by remote peer
|
1373 |
|
1374 |
"""
|
1375 |
try:
|
1376 |
(version, hmac_digest, hmac_salt) = handshake |
1377 |
except (TypeError, ValueError), err: |
1378 |
return "Invalid data: %s" % err |
1379 |
|
1380 |
if not utils.VerifySha1Hmac(cds, _GetImportExportHandshakeMessage(version), |
1381 |
hmac_digest, salt=hmac_salt): |
1382 |
return "Hash didn't match, clusters don't share the same domain secret" |
1383 |
|
1384 |
if version != constants.RIE_VERSION:
|
1385 |
return ("Clusters don't have the same remote import/export protocol" |
1386 |
" (local=%s, remote=%s)" %
|
1387 |
(constants.RIE_VERSION, version)) |
1388 |
|
1389 |
return None |
1390 |
|
1391 |
|
1392 |
def _GetRieDiskInfoMessage(disk_index, host, port): |
1393 |
"""Returns the hashed text for import/export disk information.
|
1394 |
|
1395 |
@type disk_index: number
|
1396 |
@param disk_index: Index of disk (included in hash)
|
1397 |
@type host: string
|
1398 |
@param host: Hostname
|
1399 |
@type port: number
|
1400 |
@param port: Daemon port
|
1401 |
|
1402 |
"""
|
1403 |
return "%s:%s:%s" % (disk_index, host, port) |
1404 |
|
1405 |
|
1406 |
def CheckRemoteExportDiskInfo(cds, disk_index, disk_info): |
1407 |
"""Verifies received disk information for an export.
|
1408 |
|
1409 |
@type cds: string
|
1410 |
@param cds: Cluster domain secret
|
1411 |
@type disk_index: number
|
1412 |
@param disk_index: Index of disk (included in hash)
|
1413 |
@type disk_info: sequence
|
1414 |
@param disk_info: Disk information sent by remote peer
|
1415 |
|
1416 |
"""
|
1417 |
try:
|
1418 |
(host, port, hmac_digest, hmac_salt) = disk_info |
1419 |
except (TypeError, ValueError), err: |
1420 |
raise errors.GenericError("Invalid data: %s" % err) |
1421 |
|
1422 |
if not (host and port): |
1423 |
raise errors.GenericError("Missing destination host or port") |
1424 |
|
1425 |
msg = _GetRieDiskInfoMessage(disk_index, host, port) |
1426 |
|
1427 |
if not utils.VerifySha1Hmac(cds, msg, hmac_digest, salt=hmac_salt): |
1428 |
raise errors.GenericError("HMAC is wrong") |
1429 |
|
1430 |
return (host, port)
|
1431 |
|
1432 |
|
1433 |
def ComputeRemoteImportDiskInfo(cds, salt, disk_index, host, port): |
1434 |
"""Computes the signed disk information for a remote import.
|
1435 |
|
1436 |
@type cds: string
|
1437 |
@param cds: Cluster domain secret
|
1438 |
@type salt: string
|
1439 |
@param salt: HMAC salt
|
1440 |
@type disk_index: number
|
1441 |
@param disk_index: Index of disk (included in hash)
|
1442 |
@type host: string
|
1443 |
@param host: Hostname
|
1444 |
@type port: number
|
1445 |
@param port: Daemon port
|
1446 |
|
1447 |
"""
|
1448 |
msg = _GetRieDiskInfoMessage(disk_index, host, port) |
1449 |
hmac_digest = utils.Sha1Hmac(cds, msg, salt=salt) |
1450 |
return (host, port, hmac_digest, salt)
|