root / lib / masterd / instance.py @ 4a96f1d1
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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, x509_key_name, remote_x509_ca, |
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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 x509_key_name: string
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@param x509_key_name: Name of X509 key (None for node daemon key)
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@type remote_x509_ca: string
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@param remote_x509_ca: Remote peer's CA (None for node daemon certificate)
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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._x509_key_name = x509_key_name
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self._remote_x509_ca = remote_x509_ca
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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, x509_key_name, source_x509_ca, 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 x509_key_name: string
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@param x509_key_name: Name of X509 key (None for node daemon key)
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@type source_x509_ca: string
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@param source_x509_ca: Remote peer's CA (None for node daemon certificate)
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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,
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x509_key_name, source_x509_ca, |
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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, |
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self._x509_key_name,
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self._remote_x509_ca, 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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|
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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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|
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def __init__(self, lu, node_name, x509_key_name, dest_x509_ca, |
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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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533 |
|
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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 x509_key_name: string
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@param x509_key_name: Name of X509 key (None for node daemon key)
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@type dest_x509_ca: string
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@param dest_x509_ca: Remote peer's CA (None for node daemon certificate)
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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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"""
|
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_DiskImportExportBase.__init__(self, lu, node_name,
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x509_key_name, dest_x509_ca, |
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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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566 |
|
567 |
"""
|
568 |
return self._lu.rpc.call_export_start(self.node_name, self._x509_key_name, |
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self._remote_x509_ca,
|
570 |
self._dest_host, self._dest_port, |
571 |
self._instance, self._source, |
572 |
self._source_args)
|
573 |
|
574 |
def CheckListening(self): |
575 |
"""Checks whether the daemon is listening.
|
576 |
|
577 |
"""
|
578 |
# Only an import can be listening
|
579 |
return True |
580 |
|
581 |
def _GetConnectedCheckEpoch(self): |
582 |
"""Returns the time since the daemon started.
|
583 |
|
584 |
"""
|
585 |
assert self._ts_begin is not None |
586 |
|
587 |
return self._ts_begin |
588 |
|
589 |
|
590 |
class ImportExportLoop: |
591 |
MIN_DELAY = 1.0
|
592 |
MAX_DELAY = 20.0
|
593 |
|
594 |
def __init__(self, lu): |
595 |
"""Initializes this class.
|
596 |
|
597 |
"""
|
598 |
self._lu = lu
|
599 |
self._queue = []
|
600 |
self._pending_add = []
|
601 |
|
602 |
def Add(self, diskie): |
603 |
"""Adds an import/export object to the loop.
|
604 |
|
605 |
@type diskie: Subclass of L{_DiskImportExportBase}
|
606 |
@param diskie: Import/export object
|
607 |
|
608 |
"""
|
609 |
assert diskie not in self._pending_add |
610 |
assert diskie.loop is None |
611 |
|
612 |
diskie.SetLoop(self)
|
613 |
|
614 |
# Adding new objects to a staging list is necessary, otherwise the main
|
615 |
# loop gets confused if callbacks modify the queue while the main loop is
|
616 |
# iterating over it.
|
617 |
self._pending_add.append(diskie)
|
618 |
|
619 |
@staticmethod
|
620 |
def _CollectDaemonStatus(lu, daemons): |
621 |
"""Collects the status for all import/export daemons.
|
622 |
|
623 |
"""
|
624 |
daemon_status = {} |
625 |
|
626 |
for node_name, names in daemons.iteritems(): |
627 |
result = lu.rpc.call_impexp_status(node_name, names) |
628 |
if result.fail_msg:
|
629 |
lu.LogWarning("Failed to get daemon status on %s: %s",
|
630 |
node_name, result.fail_msg) |
631 |
continue
|
632 |
|
633 |
assert len(names) == len(result.payload) |
634 |
|
635 |
daemon_status[node_name] = dict(zip(names, result.payload)) |
636 |
|
637 |
return daemon_status
|
638 |
|
639 |
@staticmethod
|
640 |
def _GetActiveDaemonNames(queue): |
641 |
"""Gets the names of all active daemons.
|
642 |
|
643 |
"""
|
644 |
result = {} |
645 |
for diskie in queue: |
646 |
if not diskie.active: |
647 |
continue
|
648 |
|
649 |
try:
|
650 |
# Start daemon if necessary
|
651 |
daemon_name = diskie.CheckDaemon() |
652 |
except _ImportExportError, err:
|
653 |
logging.exception("%s failed", diskie.MODE_TEXT)
|
654 |
diskie.Finalize(error=str(err))
|
655 |
continue
|
656 |
|
657 |
result.setdefault(diskie.node_name, []).append(daemon_name) |
658 |
|
659 |
assert len(queue) >= len(result) |
660 |
assert len(queue) >= sum([len(names) for names in result.itervalues()]) |
661 |
|
662 |
logging.debug("daemons=%r", result)
|
663 |
|
664 |
return result
|
665 |
|
666 |
def _AddPendingToQueue(self): |
667 |
"""Adds all pending import/export objects to the internal queue.
|
668 |
|
669 |
"""
|
670 |
assert compat.all(diskie not in self._queue and diskie.loop == self |
671 |
for diskie in self._pending_add) |
672 |
|
673 |
self._queue.extend(self._pending_add) |
674 |
|
675 |
del self._pending_add[:] |
676 |
|
677 |
def Run(self): |
678 |
"""Utility main loop.
|
679 |
|
680 |
"""
|
681 |
while True: |
682 |
self._AddPendingToQueue()
|
683 |
|
684 |
# Collect all active daemon names
|
685 |
daemons = self._GetActiveDaemonNames(self._queue) |
686 |
if not daemons: |
687 |
break
|
688 |
|
689 |
# Collection daemon status data
|
690 |
data = self._CollectDaemonStatus(self._lu, daemons) |
691 |
|
692 |
# Use data
|
693 |
delay = self.MAX_DELAY
|
694 |
for diskie in self._queue: |
695 |
if not diskie.active: |
696 |
continue
|
697 |
|
698 |
try:
|
699 |
try:
|
700 |
all_daemon_data = data[diskie.node_name] |
701 |
except KeyError: |
702 |
result = diskie.SetDaemonData(False, None) |
703 |
else:
|
704 |
result = \ |
705 |
diskie.SetDaemonData(True,
|
706 |
all_daemon_data[diskie.GetDaemonName()]) |
707 |
|
708 |
if not result: |
709 |
# Daemon not yet ready, retry soon
|
710 |
delay = min(3.0, delay) |
711 |
continue
|
712 |
|
713 |
if diskie.CheckFinished():
|
714 |
# Transfer finished
|
715 |
diskie.Finalize() |
716 |
continue
|
717 |
|
718 |
# Normal case: check again in 5 seconds
|
719 |
delay = min(5.0, delay) |
720 |
|
721 |
if not diskie.CheckListening(): |
722 |
# Not yet listening, retry soon
|
723 |
delay = min(1.0, delay) |
724 |
continue
|
725 |
|
726 |
if not diskie.CheckConnected(): |
727 |
# Not yet connected, retry soon
|
728 |
delay = min(1.0, delay) |
729 |
continue
|
730 |
|
731 |
except _ImportExportError, err:
|
732 |
logging.exception("%s failed", diskie.MODE_TEXT)
|
733 |
diskie.Finalize(error=str(err))
|
734 |
|
735 |
if not compat.any([diskie.active for diskie in self._queue]): |
736 |
break
|
737 |
|
738 |
# Wait a bit
|
739 |
delay = min(self.MAX_DELAY, max(self.MIN_DELAY, delay)) |
740 |
logging.debug("Waiting for %ss", delay)
|
741 |
time.sleep(delay) |
742 |
|
743 |
def FinalizeAll(self): |
744 |
"""Finalizes all pending transfers.
|
745 |
|
746 |
"""
|
747 |
success = True
|
748 |
|
749 |
for diskie in self._queue: |
750 |
success = diskie.Finalize() and success
|
751 |
|
752 |
return success
|
753 |
|
754 |
|
755 |
class _TransferInstCbBase(ImportExportCbBase): |
756 |
def __init__(self, lu, feedback_fn, instance, timeouts, src_node, src_cbs, |
757 |
dest_node, dest_ip): |
758 |
"""Initializes this class.
|
759 |
|
760 |
"""
|
761 |
ImportExportCbBase.__init__(self)
|
762 |
|
763 |
self.lu = lu
|
764 |
self.feedback_fn = feedback_fn
|
765 |
self.instance = instance
|
766 |
self.timeouts = timeouts
|
767 |
self.src_node = src_node
|
768 |
self.src_cbs = src_cbs
|
769 |
self.dest_node = dest_node
|
770 |
self.dest_ip = dest_ip
|
771 |
|
772 |
|
773 |
class _TransferInstSourceCb(_TransferInstCbBase): |
774 |
def ReportConnected(self, ie, dtp): |
775 |
"""Called when a connection has been established.
|
776 |
|
777 |
"""
|
778 |
assert self.src_cbs is None |
779 |
assert dtp.src_export == ie
|
780 |
assert dtp.dest_import
|
781 |
|
782 |
self.feedback_fn("%s is sending data on %s" % |
783 |
(dtp.data.name, ie.node_name)) |
784 |
|
785 |
def ReportFinished(self, ie, dtp): |
786 |
"""Called when a transfer has finished.
|
787 |
|
788 |
"""
|
789 |
assert self.src_cbs is None |
790 |
assert dtp.src_export == ie
|
791 |
assert dtp.dest_import
|
792 |
|
793 |
if ie.success:
|
794 |
self.feedback_fn("%s finished sending data" % dtp.data.name) |
795 |
else:
|
796 |
self.feedback_fn("%s failed to send data: %s (recent output: %r)" % |
797 |
(dtp.data.name, ie.final_message, ie.recent_output)) |
798 |
|
799 |
dtp.RecordResult(ie.success) |
800 |
|
801 |
cb = dtp.data.finished_fn |
802 |
if cb:
|
803 |
cb() |
804 |
|
805 |
# TODO: Check whether sending SIGTERM right away is okay, maybe we should
|
806 |
# give the daemon a moment to sort things out
|
807 |
if dtp.dest_import and not ie.success: |
808 |
dtp.dest_import.Abort() |
809 |
|
810 |
|
811 |
class _TransferInstDestCb(_TransferInstCbBase): |
812 |
def ReportListening(self, ie, dtp): |
813 |
"""Called when daemon started listening.
|
814 |
|
815 |
"""
|
816 |
assert self.src_cbs |
817 |
assert dtp.src_export is None |
818 |
assert dtp.dest_import
|
819 |
|
820 |
self.feedback_fn("%s is now listening, starting export" % dtp.data.name) |
821 |
|
822 |
# Start export on source node
|
823 |
de = DiskExport(self.lu, self.src_node, None, None, self.dest_ip, |
824 |
ie.listen_port, self.instance,
|
825 |
dtp.data.src_io, dtp.data.src_ioargs, |
826 |
self.timeouts, self.src_cbs, private=dtp) |
827 |
ie.loop.Add(de) |
828 |
|
829 |
dtp.src_export = de |
830 |
|
831 |
def ReportConnected(self, ie, dtp): |
832 |
"""Called when a connection has been established.
|
833 |
|
834 |
"""
|
835 |
self.feedback_fn("%s is receiving data on %s" % |
836 |
(dtp.data.name, self.dest_node))
|
837 |
|
838 |
def ReportFinished(self, ie, dtp): |
839 |
"""Called when a transfer has finished.
|
840 |
|
841 |
"""
|
842 |
if ie.success:
|
843 |
self.feedback_fn("%s finished receiving data" % dtp.data.name) |
844 |
else:
|
845 |
self.feedback_fn("%s failed to receive data: %s (recent output: %r)" % |
846 |
(dtp.data.name, ie.final_message, ie.recent_output)) |
847 |
|
848 |
dtp.RecordResult(ie.success) |
849 |
|
850 |
# TODO: Check whether sending SIGTERM right away is okay, maybe we should
|
851 |
# give the daemon a moment to sort things out
|
852 |
if dtp.src_export and not ie.success: |
853 |
dtp.src_export.Abort() |
854 |
|
855 |
|
856 |
class DiskTransfer(object): |
857 |
def __init__(self, name, src_io, src_ioargs, dest_io, dest_ioargs, |
858 |
finished_fn): |
859 |
"""Initializes this class.
|
860 |
|
861 |
@type name: string
|
862 |
@param name: User-visible name for this transfer (e.g. "disk/0")
|
863 |
@param src_io: Source I/O type
|
864 |
@param src_ioargs: Source I/O arguments
|
865 |
@param dest_io: Destination I/O type
|
866 |
@param dest_ioargs: Destination I/O arguments
|
867 |
@type finished_fn: callable
|
868 |
@param finished_fn: Function called once transfer has finished
|
869 |
|
870 |
"""
|
871 |
self.name = name
|
872 |
|
873 |
self.src_io = src_io
|
874 |
self.src_ioargs = src_ioargs
|
875 |
|
876 |
self.dest_io = dest_io
|
877 |
self.dest_ioargs = dest_ioargs
|
878 |
|
879 |
self.finished_fn = finished_fn
|
880 |
|
881 |
|
882 |
class _DiskTransferPrivate(object): |
883 |
def __init__(self, data, success): |
884 |
"""Initializes this class.
|
885 |
|
886 |
@type data: L{DiskTransfer}
|
887 |
@type success: bool
|
888 |
|
889 |
"""
|
890 |
self.data = data
|
891 |
|
892 |
self.src_export = None |
893 |
self.dest_import = None |
894 |
|
895 |
self.success = success
|
896 |
|
897 |
def RecordResult(self, success): |
898 |
"""Updates the status.
|
899 |
|
900 |
One failed part will cause the whole transfer to fail.
|
901 |
|
902 |
"""
|
903 |
self.success = self.success and success |
904 |
|
905 |
|
906 |
def TransferInstanceData(lu, feedback_fn, src_node, dest_node, dest_ip, |
907 |
instance, all_transfers): |
908 |
"""Transfers an instance's data from one node to another.
|
909 |
|
910 |
@param lu: Logical unit instance
|
911 |
@param feedback_fn: Feedback function
|
912 |
@type src_node: string
|
913 |
@param src_node: Source node name
|
914 |
@type dest_node: string
|
915 |
@param dest_node: Destination node name
|
916 |
@type dest_ip: string
|
917 |
@param dest_ip: IP address of destination node
|
918 |
@type instance: L{objects.Instance}
|
919 |
@param instance: Instance object
|
920 |
@type all_transfers: list of L{DiskTransfer} instances
|
921 |
@param all_transfers: List of all disk transfers to be made
|
922 |
@rtype: list
|
923 |
@return: List with a boolean (True=successful, False=failed) for success for
|
924 |
each transfer
|
925 |
|
926 |
"""
|
927 |
timeouts = ImportExportTimeouts(constants.DISK_TRANSFER_CONNECT_TIMEOUT) |
928 |
src_cbs = _TransferInstSourceCb(lu, feedback_fn, instance, timeouts, |
929 |
src_node, None, dest_node, dest_ip)
|
930 |
dest_cbs = _TransferInstDestCb(lu, feedback_fn, instance, timeouts, |
931 |
src_node, src_cbs, dest_node, dest_ip) |
932 |
|
933 |
all_dtp = [] |
934 |
|
935 |
ieloop = ImportExportLoop(lu) |
936 |
try:
|
937 |
for transfer in all_transfers: |
938 |
if transfer:
|
939 |
feedback_fn("Exporting %s from %s to %s" %
|
940 |
(transfer.name, src_node, dest_node)) |
941 |
|
942 |
dtp = _DiskTransferPrivate(transfer, True)
|
943 |
|
944 |
di = DiskImport(lu, dest_node, None, None, instance, |
945 |
transfer.dest_io, transfer.dest_ioargs, |
946 |
timeouts, dest_cbs, private=dtp) |
947 |
ieloop.Add(di) |
948 |
|
949 |
dtp.dest_import = di |
950 |
else:
|
951 |
dtp = _DiskTransferPrivate(None, False) |
952 |
|
953 |
all_dtp.append(dtp) |
954 |
|
955 |
ieloop.Run() |
956 |
finally:
|
957 |
ieloop.FinalizeAll() |
958 |
|
959 |
assert len(all_dtp) == len(all_transfers) |
960 |
assert compat.all([(dtp.src_export is None or |
961 |
dtp.src_export.success is not None) and |
962 |
(dtp.dest_import is None or |
963 |
dtp.dest_import.success is not None) |
964 |
for dtp in all_dtp]), \ |
965 |
"Not all imports/exports are finalized"
|
966 |
|
967 |
return [bool(dtp.success) for dtp in all_dtp] |
968 |
|
969 |
|
970 |
class _RemoteExportCb(ImportExportCbBase): |
971 |
def __init__(self, feedback_fn, disk_count): |
972 |
"""Initializes this class.
|
973 |
|
974 |
"""
|
975 |
ImportExportCbBase.__init__(self)
|
976 |
self._feedback_fn = feedback_fn
|
977 |
self._dresults = [None] * disk_count |
978 |
|
979 |
@property
|
980 |
def disk_results(self): |
981 |
"""Returns per-disk results.
|
982 |
|
983 |
"""
|
984 |
return self._dresults |
985 |
|
986 |
def ReportConnected(self, ie, private): |
987 |
"""Called when a connection has been established.
|
988 |
|
989 |
"""
|
990 |
(idx, _) = private |
991 |
|
992 |
self._feedback_fn("Disk %s is now sending data" % idx) |
993 |
|
994 |
def ReportFinished(self, ie, private): |
995 |
"""Called when a transfer has finished.
|
996 |
|
997 |
"""
|
998 |
(idx, finished_fn) = private |
999 |
|
1000 |
if ie.success:
|
1001 |
self._feedback_fn("Disk %s finished sending data" % idx) |
1002 |
else:
|
1003 |
self._feedback_fn("Disk %s failed to send data: %s (recent output: %r)" % |
1004 |
(idx, ie.final_message, ie.recent_output)) |
1005 |
|
1006 |
self._dresults[idx] = bool(ie.success) |
1007 |
|
1008 |
if finished_fn:
|
1009 |
finished_fn() |
1010 |
|
1011 |
|
1012 |
class ExportInstanceHelper: |
1013 |
def __init__(self, lu, feedback_fn, instance): |
1014 |
"""Initializes this class.
|
1015 |
|
1016 |
@param lu: Logical unit instance
|
1017 |
@param feedback_fn: Feedback function
|
1018 |
@type instance: L{objects.Instance}
|
1019 |
@param instance: Instance object
|
1020 |
|
1021 |
"""
|
1022 |
self._lu = lu
|
1023 |
self._feedback_fn = feedback_fn
|
1024 |
self._instance = instance
|
1025 |
|
1026 |
self._snap_disks = []
|
1027 |
self._removed_snaps = [False] * len(instance.disks) |
1028 |
|
1029 |
def CreateSnapshots(self): |
1030 |
"""Creates an LVM snapshot for every disk of the instance.
|
1031 |
|
1032 |
"""
|
1033 |
assert not self._snap_disks |
1034 |
|
1035 |
instance = self._instance
|
1036 |
src_node = instance.primary_node |
1037 |
|
1038 |
vgname = self._lu.cfg.GetVGName()
|
1039 |
|
1040 |
for idx, disk in enumerate(instance.disks): |
1041 |
self._feedback_fn("Creating a snapshot of disk/%s on node %s" % |
1042 |
(idx, src_node)) |
1043 |
|
1044 |
# result.payload will be a snapshot of an lvm leaf of the one we
|
1045 |
# passed
|
1046 |
result = self._lu.rpc.call_blockdev_snapshot(src_node, disk)
|
1047 |
msg = result.fail_msg |
1048 |
if msg:
|
1049 |
self._lu.LogWarning("Could not snapshot disk/%s on node %s: %s", |
1050 |
idx, src_node, msg) |
1051 |
new_dev = False
|
1052 |
else:
|
1053 |
disk_id = (vgname, result.payload) |
1054 |
new_dev = objects.Disk(dev_type=constants.LD_LV, size=disk.size, |
1055 |
logical_id=disk_id, physical_id=disk_id, |
1056 |
iv_name=disk.iv_name) |
1057 |
|
1058 |
self._snap_disks.append(new_dev)
|
1059 |
|
1060 |
assert len(self._snap_disks) == len(instance.disks) |
1061 |
assert len(self._removed_snaps) == len(instance.disks) |
1062 |
|
1063 |
def _RemoveSnapshot(self, disk_index): |
1064 |
"""Removes an LVM snapshot.
|
1065 |
|
1066 |
@type disk_index: number
|
1067 |
@param disk_index: Index of the snapshot to be removed
|
1068 |
|
1069 |
"""
|
1070 |
disk = self._snap_disks[disk_index]
|
1071 |
if disk and not self._removed_snaps[disk_index]: |
1072 |
src_node = self._instance.primary_node
|
1073 |
|
1074 |
self._feedback_fn("Removing snapshot of disk/%s on node %s" % |
1075 |
(disk_index, src_node)) |
1076 |
|
1077 |
result = self._lu.rpc.call_blockdev_remove(src_node, disk)
|
1078 |
if result.fail_msg:
|
1079 |
self._lu.LogWarning("Could not remove snapshot for disk/%d from node" |
1080 |
" %s: %s", disk_index, src_node, result.fail_msg)
|
1081 |
else:
|
1082 |
self._removed_snaps[disk_index] = True |
1083 |
|
1084 |
def LocalExport(self, dest_node): |
1085 |
"""Intra-cluster instance export.
|
1086 |
|
1087 |
@type dest_node: L{objects.Node}
|
1088 |
@param dest_node: Destination node
|
1089 |
|
1090 |
"""
|
1091 |
instance = self._instance
|
1092 |
src_node = instance.primary_node |
1093 |
|
1094 |
assert len(self._snap_disks) == len(instance.disks) |
1095 |
|
1096 |
transfers = [] |
1097 |
|
1098 |
for idx, dev in enumerate(self._snap_disks): |
1099 |
if not dev: |
1100 |
transfers.append(None)
|
1101 |
continue
|
1102 |
|
1103 |
path = utils.PathJoin(constants.EXPORT_DIR, "%s.new" % instance.name,
|
1104 |
dev.physical_id[1])
|
1105 |
|
1106 |
finished_fn = compat.partial(self._TransferFinished, idx)
|
1107 |
|
1108 |
# FIXME: pass debug option from opcode to backend
|
1109 |
dt = DiskTransfer("snapshot/%s" % idx,
|
1110 |
constants.IEIO_SCRIPT, (dev, idx), |
1111 |
constants.IEIO_FILE, (path, ), |
1112 |
finished_fn) |
1113 |
transfers.append(dt) |
1114 |
|
1115 |
# Actually export data
|
1116 |
dresults = TransferInstanceData(self._lu, self._feedback_fn, |
1117 |
src_node, dest_node.name, |
1118 |
dest_node.secondary_ip, |
1119 |
instance, transfers) |
1120 |
|
1121 |
assert len(dresults) == len(instance.disks) |
1122 |
|
1123 |
self._feedback_fn("Finalizing export on %s" % dest_node.name) |
1124 |
result = self._lu.rpc.call_finalize_export(dest_node.name, instance,
|
1125 |
self._snap_disks)
|
1126 |
msg = result.fail_msg |
1127 |
fin_resu = not msg
|
1128 |
if msg:
|
1129 |
self._lu.LogWarning("Could not finalize export for instance %s" |
1130 |
" on node %s: %s", instance.name, dest_node.name, msg)
|
1131 |
|
1132 |
return (fin_resu, dresults)
|
1133 |
|
1134 |
def RemoteExport(self, x509_key_name, dest_x509_ca, disk_info, timeouts): |
1135 |
"""Inter-cluster instance export.
|
1136 |
|
1137 |
@type x509_key_name: string
|
1138 |
@param x509_key_name: X509 key name for encrypting data
|
1139 |
@type dest_x509_ca: OpenSSL.crypto.X509
|
1140 |
@param dest_x509_ca: Remote peer X509 CA object
|
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 |
dest_ca_pem = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, |
1154 |
dest_x509_ca) |
1155 |
|
1156 |
ieloop = ImportExportLoop(self._lu)
|
1157 |
try:
|
1158 |
for idx, (dev, (host, port, _, _)) in enumerate(zip(instance.disks, |
1159 |
disk_info)): |
1160 |
self._feedback_fn("Sending disk %s to %s:%s" % (idx, host, port)) |
1161 |
finished_fn = compat.partial(self._TransferFinished, idx)
|
1162 |
ieloop.Add(DiskExport(self._lu, instance.primary_node,
|
1163 |
x509_key_name, dest_ca_pem, host, port, instance, |
1164 |
constants.IEIO_SCRIPT, (dev, idx), |
1165 |
timeouts, cbs, private=(idx, finished_fn))) |
1166 |
|
1167 |
ieloop.Run() |
1168 |
finally:
|
1169 |
ieloop.FinalizeAll() |
1170 |
|
1171 |
return (True, cbs.disk_results) |
1172 |
|
1173 |
def _TransferFinished(self, idx): |
1174 |
"""Called once a transfer has finished.
|
1175 |
|
1176 |
@type idx: number
|
1177 |
@param idx: Disk index
|
1178 |
|
1179 |
"""
|
1180 |
logging.debug("Transfer %s finished", idx)
|
1181 |
self._RemoveSnapshot(idx)
|
1182 |
|
1183 |
def Cleanup(self): |
1184 |
"""Remove all snapshots.
|
1185 |
|
1186 |
"""
|
1187 |
assert len(self._removed_snaps) == len(self._instance.disks) |
1188 |
for idx in range(len(self._instance.disks)): |
1189 |
self._RemoveSnapshot(idx)
|
1190 |
|
1191 |
|
1192 |
def _GetImportExportHandshakeMessage(version): |
1193 |
"""Returns the handshake message for a RIE protocol version.
|
1194 |
|
1195 |
@type version: number
|
1196 |
|
1197 |
"""
|
1198 |
return "%s:%s" % (version, constants.RIE_HANDSHAKE) |
1199 |
|
1200 |
|
1201 |
def ComputeRemoteExportHandshake(cds): |
1202 |
"""Computes the remote import/export handshake.
|
1203 |
|
1204 |
@type cds: string
|
1205 |
@param cds: Cluster domain secret
|
1206 |
|
1207 |
"""
|
1208 |
salt = utils.GenerateSecret(8)
|
1209 |
msg = _GetImportExportHandshakeMessage(constants.RIE_VERSION) |
1210 |
return (constants.RIE_VERSION, utils.Sha1Hmac(cds, msg, salt=salt), salt)
|
1211 |
|
1212 |
|
1213 |
def CheckRemoteExportHandshake(cds, handshake): |
1214 |
"""Checks the handshake of a remote import/export.
|
1215 |
|
1216 |
@type cds: string
|
1217 |
@param cds: Cluster domain secret
|
1218 |
@type handshake: sequence
|
1219 |
@param handshake: Handshake sent by remote peer
|
1220 |
|
1221 |
"""
|
1222 |
try:
|
1223 |
(version, hmac_digest, hmac_salt) = handshake |
1224 |
except (TypeError, ValueError), err: |
1225 |
return "Invalid data: %s" % err |
1226 |
|
1227 |
if not utils.VerifySha1Hmac(cds, _GetImportExportHandshakeMessage(version), |
1228 |
hmac_digest, salt=hmac_salt): |
1229 |
return "Hash didn't match, clusters don't share the same domain secret" |
1230 |
|
1231 |
if version != constants.RIE_VERSION:
|
1232 |
return ("Clusters don't have the same remote import/export protocol" |
1233 |
" (local=%s, remote=%s)" %
|
1234 |
(constants.RIE_VERSION, version)) |
1235 |
|
1236 |
return None |
1237 |
|
1238 |
|
1239 |
def _GetRieDiskInfoMessage(disk_index, host, port): |
1240 |
"""Returns the hashed text for import/export disk information.
|
1241 |
|
1242 |
@type disk_index: number
|
1243 |
@param disk_index: Index of disk (included in hash)
|
1244 |
@type host: string
|
1245 |
@param host: Hostname
|
1246 |
@type port: number
|
1247 |
@param port: Daemon port
|
1248 |
|
1249 |
"""
|
1250 |
return "%s:%s:%s" % (disk_index, host, port) |
1251 |
|
1252 |
|
1253 |
def CheckRemoteExportDiskInfo(cds, disk_index, disk_info): |
1254 |
"""Verifies received disk information for an export.
|
1255 |
|
1256 |
@type cds: string
|
1257 |
@param cds: Cluster domain secret
|
1258 |
@type disk_index: number
|
1259 |
@param disk_index: Index of disk (included in hash)
|
1260 |
@type disk_info: sequence
|
1261 |
@param disk_info: Disk information sent by remote peer
|
1262 |
|
1263 |
"""
|
1264 |
try:
|
1265 |
(host, port, hmac_digest, hmac_salt) = disk_info |
1266 |
except (TypeError, ValueError), err: |
1267 |
raise errors.GenericError("Invalid data: %s" % err) |
1268 |
|
1269 |
if not (host and port): |
1270 |
raise errors.GenericError("Missing destination host or port") |
1271 |
|
1272 |
msg = _GetRieDiskInfoMessage(disk_index, host, port) |
1273 |
|
1274 |
if not utils.VerifySha1Hmac(cds, msg, hmac_digest, salt=hmac_salt): |
1275 |
raise errors.GenericError("HMAC is wrong") |
1276 |
|
1277 |
return (host, port)
|
1278 |
|
1279 |
|
1280 |
def ComputeRemoteImportDiskInfo(cds, salt, disk_index, host, port): |
1281 |
"""Computes the signed disk information for a remote import.
|
1282 |
|
1283 |
@type cds: string
|
1284 |
@param cds: Cluster domain secret
|
1285 |
@type salt: string
|
1286 |
@param salt: HMAC salt
|
1287 |
@type disk_index: number
|
1288 |
@param disk_index: Index of disk (included in hash)
|
1289 |
@type host: string
|
1290 |
@param host: Hostname
|
1291 |
@type port: number
|
1292 |
@param port: Daemon port
|
1293 |
|
1294 |
"""
|
1295 |
msg = _GetRieDiskInfoMessage(disk_index, host, port) |
1296 |
hmac_digest = utils.Sha1Hmac(cds, msg, salt=salt) |
1297 |
return (host, port, hmac_digest, salt)
|