root / lib / watcher / __init__.py @ ae1a845c
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1 | 9f4bb951 | Michael Hanselmann | #
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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | f2af0bec | Iustin Pop | # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | 55c85950 | Iustin Pop | """Tool to restart erroneously downed virtual machines.
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23 | a8083063 | Iustin Pop |
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24 | a8083063 | Iustin Pop | This program and set of classes implement a watchdog to restart
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25 | a8083063 | Iustin Pop | virtual machines in a Ganeti cluster that have crashed or been killed
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26 | a8083063 | Iustin Pop | by a node reboot. Run from cron or similar.
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27 | a8083063 | Iustin Pop |
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28 | 5a3103e9 | Michael Hanselmann | """
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29 | a8083063 | Iustin Pop | |
30 | 7260cfbe | Iustin Pop | # pylint: disable-msg=C0103,W0142
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31 | 7260cfbe | Iustin Pop | |
32 | 7260cfbe | Iustin Pop | # C0103: Invalid name ganeti-watcher
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33 | 7260cfbe | Iustin Pop | |
34 | a8083063 | Iustin Pop | import os |
35 | cfcc79c6 | Michael Hanselmann | import os.path |
36 | a8083063 | Iustin Pop | import sys |
37 | a8083063 | Iustin Pop | import time |
38 | 438b45d4 | Michael Hanselmann | import logging |
39 | a8083063 | Iustin Pop | from optparse import OptionParser |
40 | a8083063 | Iustin Pop | |
41 | a8083063 | Iustin Pop | from ganeti import utils |
42 | a8083063 | Iustin Pop | from ganeti import constants |
43 | 83e5e26f | René Nussbaumer | from ganeti import compat |
44 | 67fe61c4 | Michael Hanselmann | from ganeti import serializer |
45 | 89e1fc26 | Iustin Pop | from ganeti import errors |
46 | e125c67c | Michael Hanselmann | from ganeti import opcodes |
47 | e125c67c | Michael Hanselmann | from ganeti import cli |
48 | 7dfb83c2 | Iustin Pop | from ganeti import luxi |
49 | 50273051 | Iustin Pop | from ganeti import ssconf |
50 | 50273051 | Iustin Pop | from ganeti import bdev |
51 | 50273051 | Iustin Pop | from ganeti import hypervisor |
52 | db147305 | Tom Limoncelli | from ganeti import rapi |
53 | 50273051 | Iustin Pop | from ganeti.confd import client as confd_client |
54 | a744b676 | Manuel Franceschini | from ganeti import netutils |
55 | a8083063 | Iustin Pop | |
56 | db147305 | Tom Limoncelli | import ganeti.rapi.client # pylint: disable-msg=W0611 |
57 | db147305 | Tom Limoncelli | |
58 | a8083063 | Iustin Pop | |
59 | 5a3103e9 | Michael Hanselmann | MAXTRIES = 5
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60 | f5116c87 | Iustin Pop | # Delete any record that is older than 8 hours; this value is based on
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61 | f5116c87 | Iustin Pop | # the fact that the current retry counter is 5, and watcher runs every
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62 | f5116c87 | Iustin Pop | # 5 minutes, so it takes around half an hour to exceed the retry
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63 | f5116c87 | Iustin Pop | # counter, so 8 hours (16*1/2h) seems like a reasonable reset time
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64 | f5116c87 | Iustin Pop | RETRY_EXPIRATION = 8 * 3600 |
65 | 61a980a9 | Michael Hanselmann | BAD_STATES = [constants.INSTST_ERRORDOWN] |
66 | 61a980a9 | Michael Hanselmann | HELPLESS_STATES = [constants.INSTST_NODEDOWN, constants.INSTST_NODEOFFLINE] |
67 | 5a3103e9 | Michael Hanselmann | NOTICE = 'NOTICE'
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68 | 5a3103e9 | Michael Hanselmann | ERROR = 'ERROR'
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69 | 7b195d9b | Michael Hanselmann | KEY_RESTART_COUNT = "restart_count"
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70 | 7b195d9b | Michael Hanselmann | KEY_RESTART_WHEN = "restart_when"
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71 | 7b195d9b | Michael Hanselmann | KEY_BOOT_ID = "bootid"
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72 | 5a3103e9 | Michael Hanselmann | |
73 | 5a3103e9 | Michael Hanselmann | |
74 | a0aa6b49 | Michael Hanselmann | # Global LUXI client object
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75 | e125c67c | Michael Hanselmann | client = None
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76 | e125c67c | Michael Hanselmann | |
77 | e125c67c | Michael Hanselmann | |
78 | 7bca53e4 | Michael Hanselmann | class NotMasterError(errors.GenericError): |
79 | 38242904 | Iustin Pop | """Exception raised when this host is not the master."""
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80 | a8083063 | Iustin Pop | |
81 | a8083063 | Iustin Pop | |
82 | 3753b2cb | Michael Hanselmann | def ShouldPause(): |
83 | 3753b2cb | Michael Hanselmann | """Check whether we should pause.
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84 | 3753b2cb | Michael Hanselmann |
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85 | 3753b2cb | Michael Hanselmann | """
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86 | 3753b2cb | Michael Hanselmann | return bool(utils.ReadWatcherPauseFile(constants.WATCHER_PAUSEFILE)) |
87 | 3753b2cb | Michael Hanselmann | |
88 | 3753b2cb | Michael Hanselmann | |
89 | f1115454 | Guido Trotter | def StartNodeDaemons(): |
90 | f1115454 | Guido Trotter | """Start all the daemons that should be running on all nodes.
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91 | f1115454 | Guido Trotter |
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92 | f1115454 | Guido Trotter | """
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93 | 55c85950 | Iustin Pop | # on master or not, try to start the node daemon
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94 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.NODED) |
95 | f1115454 | Guido Trotter | # start confd as well. On non candidates it will be in disabled mode.
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96 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.CONFD) |
97 | f1115454 | Guido Trotter | |
98 | f1115454 | Guido Trotter | |
99 | 9e289e36 | Guido Trotter | def RunWatcherHooks(): |
100 | 9e289e36 | Guido Trotter | """Run the watcher hooks.
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101 | 9e289e36 | Guido Trotter |
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102 | 9e289e36 | Guido Trotter | """
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103 | c4feafe8 | Iustin Pop | hooks_dir = utils.PathJoin(constants.HOOKS_BASE_DIR, |
104 | c4feafe8 | Iustin Pop | constants.HOOKS_NAME_WATCHER) |
105 | 10e689d4 | Iustin Pop | if not os.path.isdir(hooks_dir): |
106 | 10e689d4 | Iustin Pop | return
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107 | 9e289e36 | Guido Trotter | |
108 | 9e289e36 | Guido Trotter | try:
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109 | 9e289e36 | Guido Trotter | results = utils.RunParts(hooks_dir) |
110 | a0aa6b49 | Michael Hanselmann | except Exception: # pylint: disable-msg=W0703 |
111 | a0aa6b49 | Michael Hanselmann | logging.exception("RunParts %s failed: %s", hooks_dir)
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112 | a0aa6b49 | Michael Hanselmann | return
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113 | 9e289e36 | Guido Trotter | |
114 | 9e289e36 | Guido Trotter | for (relname, status, runresult) in results: |
115 | 9e289e36 | Guido Trotter | if status == constants.RUNPARTS_SKIP:
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116 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: skipped", relname)
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117 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_ERR:
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118 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: error (%s)", relname, runresult)
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119 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_RUN:
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120 | 9e289e36 | Guido Trotter | if runresult.failed:
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121 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: failed (exit: %d) (output: %s)",
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122 | 9e289e36 | Guido Trotter | relname, runresult.exit_code, runresult.output) |
123 | 9e289e36 | Guido Trotter | else:
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124 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: success (output: %s)", relname,
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125 | 9e289e36 | Guido Trotter | runresult.output) |
126 | 9e289e36 | Guido Trotter | |
127 | 001b3825 | Michael Hanselmann | |
128 | 50273051 | Iustin Pop | class NodeMaintenance(object): |
129 | 50273051 | Iustin Pop | """Talks to confd daemons and possible shutdown instances/drbd devices.
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130 | 50273051 | Iustin Pop |
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131 | 50273051 | Iustin Pop | """
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132 | 50273051 | Iustin Pop | def __init__(self): |
133 | 50273051 | Iustin Pop | self.store_cb = confd_client.StoreResultCallback()
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134 | 50273051 | Iustin Pop | self.filter_cb = confd_client.ConfdFilterCallback(self.store_cb) |
135 | 50273051 | Iustin Pop | self.confd_client = confd_client.GetConfdClient(self.filter_cb) |
136 | 50273051 | Iustin Pop | |
137 | 50273051 | Iustin Pop | @staticmethod
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138 | 50273051 | Iustin Pop | def ShouldRun(): |
139 | 50273051 | Iustin Pop | """Checks whether node maintenance should run.
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140 | 50273051 | Iustin Pop |
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141 | 50273051 | Iustin Pop | """
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142 | 50273051 | Iustin Pop | try:
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143 | 50273051 | Iustin Pop | return ssconf.SimpleStore().GetMaintainNodeHealth()
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144 | 50273051 | Iustin Pop | except errors.ConfigurationError, err:
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145 | 50273051 | Iustin Pop | logging.error("Configuration error, not activating node maintenance: %s",
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146 | 50273051 | Iustin Pop | err) |
147 | 50273051 | Iustin Pop | return False |
148 | 50273051 | Iustin Pop | |
149 | 50273051 | Iustin Pop | @staticmethod
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150 | 50273051 | Iustin Pop | def GetRunningInstances(): |
151 | 50273051 | Iustin Pop | """Compute list of hypervisor/running instances.
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152 | 50273051 | Iustin Pop |
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153 | 50273051 | Iustin Pop | """
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154 | 50273051 | Iustin Pop | hyp_list = ssconf.SimpleStore().GetHypervisorList() |
155 | 50273051 | Iustin Pop | results = [] |
156 | 50273051 | Iustin Pop | for hv_name in hyp_list: |
157 | 50273051 | Iustin Pop | try:
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158 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
159 | 50273051 | Iustin Pop | ilist = hv.ListInstances() |
160 | 50273051 | Iustin Pop | results.extend([(iname, hv_name) for iname in ilist]) |
161 | 50273051 | Iustin Pop | except: # pylint: disable-msg=W0702 |
162 | 50273051 | Iustin Pop | logging.error("Error while listing instances for hypervisor %s",
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163 | 50273051 | Iustin Pop | hv_name, exc_info=True)
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164 | 50273051 | Iustin Pop | return results
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165 | 50273051 | Iustin Pop | |
166 | 50273051 | Iustin Pop | @staticmethod
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167 | 50273051 | Iustin Pop | def GetUsedDRBDs(): |
168 | 50273051 | Iustin Pop | """Get list of used DRBD minors.
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169 | 50273051 | Iustin Pop |
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170 | 50273051 | Iustin Pop | """
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171 | 50273051 | Iustin Pop | return bdev.DRBD8.GetUsedDevs().keys()
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172 | 50273051 | Iustin Pop | |
173 | 50273051 | Iustin Pop | @classmethod
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174 | 50273051 | Iustin Pop | def DoMaintenance(cls, role): |
175 | 50273051 | Iustin Pop | """Maintain the instance list.
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176 | 50273051 | Iustin Pop |
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177 | 50273051 | Iustin Pop | """
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178 | 50273051 | Iustin Pop | if role == constants.CONFD_NODE_ROLE_OFFLINE:
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179 | 50273051 | Iustin Pop | inst_running = cls.GetRunningInstances() |
180 | 50273051 | Iustin Pop | cls.ShutdownInstances(inst_running) |
181 | 50273051 | Iustin Pop | drbd_running = cls.GetUsedDRBDs() |
182 | 50273051 | Iustin Pop | cls.ShutdownDRBD(drbd_running) |
183 | 50273051 | Iustin Pop | else:
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184 | 50273051 | Iustin Pop | logging.debug("Not doing anything for role %s", role)
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185 | 50273051 | Iustin Pop | |
186 | 50273051 | Iustin Pop | @staticmethod
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187 | 50273051 | Iustin Pop | def ShutdownInstances(inst_running): |
188 | 50273051 | Iustin Pop | """Shutdown running instances.
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189 | 50273051 | Iustin Pop |
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190 | 50273051 | Iustin Pop | """
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191 | 50273051 | Iustin Pop | names_running = set([i[0] for i in inst_running]) |
192 | 50273051 | Iustin Pop | if names_running:
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193 | 50273051 | Iustin Pop | logging.info("Following instances should not be running,"
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194 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(names_running))
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195 | 50273051 | Iustin Pop | # this dictionary will collapse duplicate instance names (only
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196 | 50273051 | Iustin Pop | # xen pvm/vhm) into a single key, which is fine
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197 | 50273051 | Iustin Pop | i2h = dict(inst_running)
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198 | 50273051 | Iustin Pop | for name in names_running: |
199 | 50273051 | Iustin Pop | hv_name = i2h[name] |
200 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
201 | 50273051 | Iustin Pop | hv.StopInstance(None, force=True, name=name) |
202 | 50273051 | Iustin Pop | |
203 | 50273051 | Iustin Pop | @staticmethod
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204 | 50273051 | Iustin Pop | def ShutdownDRBD(drbd_running): |
205 | 50273051 | Iustin Pop | """Shutdown active DRBD devices.
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206 | 50273051 | Iustin Pop |
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207 | 50273051 | Iustin Pop | """
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208 | 50273051 | Iustin Pop | if drbd_running:
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209 | 50273051 | Iustin Pop | logging.info("Following DRBD minors should not be active,"
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210 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(drbd_running))
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211 | 50273051 | Iustin Pop | for minor in drbd_running: |
212 | 50273051 | Iustin Pop | # pylint: disable-msg=W0212
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213 | 50273051 | Iustin Pop | # using the private method as is, pending enhancements to the DRBD
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214 | 50273051 | Iustin Pop | # interface
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215 | 50273051 | Iustin Pop | bdev.DRBD8._ShutdownAll(minor) |
216 | 50273051 | Iustin Pop | |
217 | 50273051 | Iustin Pop | def Exec(self): |
218 | 50273051 | Iustin Pop | """Check node status versus cluster desired state.
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219 | 50273051 | Iustin Pop |
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220 | 50273051 | Iustin Pop | """
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221 | b705c7a6 | Manuel Franceschini | my_name = netutils.Hostname.GetSysName() |
222 | 50273051 | Iustin Pop | req = confd_client.ConfdClientRequest(type= |
223 | 50273051 | Iustin Pop | constants.CONFD_REQ_NODE_ROLE_BYNAME, |
224 | 50273051 | Iustin Pop | query=my_name) |
225 | ebacb943 | Iustin Pop | self.confd_client.SendRequest(req, async=False, coverage=-1) |
226 | 50273051 | Iustin Pop | timed_out, _, _ = self.confd_client.WaitForReply(req.rsalt)
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227 | 50273051 | Iustin Pop | if not timed_out: |
228 | 50273051 | Iustin Pop | # should have a valid response
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229 | 50273051 | Iustin Pop | status, result = self.store_cb.GetResponse(req.rsalt)
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230 | 50273051 | Iustin Pop | assert status, "Missing result but received replies" |
231 | 50273051 | Iustin Pop | if not self.filter_cb.consistent[req.rsalt]: |
232 | 50273051 | Iustin Pop | logging.warning("Inconsistent replies, not doing anything")
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233 | 50273051 | Iustin Pop | return
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234 | 50273051 | Iustin Pop | self.DoMaintenance(result.server_reply.answer)
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235 | 50273051 | Iustin Pop | else:
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236 | 50273051 | Iustin Pop | logging.warning("Confd query timed out, cannot do maintenance actions")
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237 | 50273051 | Iustin Pop | |
238 | 50273051 | Iustin Pop | |
239 | 5a3103e9 | Michael Hanselmann | class WatcherState(object): |
240 | a8083063 | Iustin Pop | """Interface to a state file recording restart attempts.
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241 | a8083063 | Iustin Pop |
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242 | a8083063 | Iustin Pop | """
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243 | 001b3825 | Michael Hanselmann | def __init__(self, statefile): |
244 | 5a3103e9 | Michael Hanselmann | """Open, lock, read and parse the file.
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245 | 5a3103e9 | Michael Hanselmann |
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246 | 001b3825 | Michael Hanselmann | @type statefile: file
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247 | 001b3825 | Michael Hanselmann | @param statefile: State file object
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248 | 5a3103e9 | Michael Hanselmann |
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249 | 5a3103e9 | Michael Hanselmann | """
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250 | 001b3825 | Michael Hanselmann | self.statefile = statefile
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251 | a8083063 | Iustin Pop | |
252 | 5a3103e9 | Michael Hanselmann | try:
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253 | 2c404217 | Iustin Pop | state_data = self.statefile.read()
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254 | 2c404217 | Iustin Pop | if not state_data: |
255 | 2c404217 | Iustin Pop | self._data = {}
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256 | 2c404217 | Iustin Pop | else:
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257 | 2c404217 | Iustin Pop | self._data = serializer.Load(state_data)
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258 | 7260cfbe | Iustin Pop | except Exception, msg: # pylint: disable-msg=W0703 |
259 | 5a3103e9 | Michael Hanselmann | # Ignore errors while loading the file and treat it as empty
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260 | b76f660d | Michael Hanselmann | self._data = {}
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261 | 2c404217 | Iustin Pop | logging.warning(("Invalid state file. Using defaults."
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262 | 438b45d4 | Michael Hanselmann | " Error message: %s"), msg)
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263 | 5a3103e9 | Michael Hanselmann | |
264 | b76f660d | Michael Hanselmann | if "instance" not in self._data: |
265 | b76f660d | Michael Hanselmann | self._data["instance"] = {} |
266 | b76f660d | Michael Hanselmann | if "node" not in self._data: |
267 | b76f660d | Michael Hanselmann | self._data["node"] = {} |
268 | 5a3103e9 | Michael Hanselmann | |
269 | 26517d45 | Iustin Pop | self._orig_data = serializer.Dump(self._data) |
270 | 2fb96d39 | Michael Hanselmann | |
271 | fc428e32 | Michael Hanselmann | def Save(self): |
272 | fc428e32 | Michael Hanselmann | """Save state to file, then unlock and close it.
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273 | 5a3103e9 | Michael Hanselmann |
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274 | 5a3103e9 | Michael Hanselmann | """
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275 | fc428e32 | Michael Hanselmann | assert self.statefile |
276 | fc428e32 | Michael Hanselmann | |
277 | 26517d45 | Iustin Pop | serialized_form = serializer.Dump(self._data)
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278 | 26517d45 | Iustin Pop | if self._orig_data == serialized_form: |
279 | 2fb96d39 | Michael Hanselmann | logging.debug("Data didn't change, just touching status file")
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280 | 2fb96d39 | Michael Hanselmann | os.utime(constants.WATCHER_STATEFILE, None)
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281 | 2fb96d39 | Michael Hanselmann | return
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282 | 2fb96d39 | Michael Hanselmann | |
283 | fc428e32 | Michael Hanselmann | # We need to make sure the file is locked before renaming it, otherwise
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284 | fc428e32 | Michael Hanselmann | # starting ganeti-watcher again at the same time will create a conflict.
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285 | fc428e32 | Michael Hanselmann | fd = utils.WriteFile(constants.WATCHER_STATEFILE, |
286 | 26517d45 | Iustin Pop | data=serialized_form, |
287 | eb0f0ce0 | Michael Hanselmann | prewrite=utils.LockFile, close=False)
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288 | fc428e32 | Michael Hanselmann | self.statefile = os.fdopen(fd, 'w+') |
289 | 5a3103e9 | Michael Hanselmann | |
290 | fc428e32 | Michael Hanselmann | def Close(self): |
291 | 5a3103e9 | Michael Hanselmann | """Unlock configuration file and close it.
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292 | 5a3103e9 | Michael Hanselmann |
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293 | 5a3103e9 | Michael Hanselmann | """
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294 | 5a3103e9 | Michael Hanselmann | assert self.statefile |
295 | 5a3103e9 | Michael Hanselmann | |
296 | fc428e32 | Michael Hanselmann | # Files are automatically unlocked when closing them
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297 | 5a3103e9 | Michael Hanselmann | self.statefile.close()
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298 | 5a3103e9 | Michael Hanselmann | self.statefile = None |
299 | 5a3103e9 | Michael Hanselmann | |
300 | 5a3103e9 | Michael Hanselmann | def GetNodeBootID(self, name): |
301 | 5a3103e9 | Michael Hanselmann | """Returns the last boot ID of a node or None.
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302 | a8083063 | Iustin Pop |
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303 | 5a3103e9 | Michael Hanselmann | """
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304 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
305 | 5a3103e9 | Michael Hanselmann | |
306 | 7b195d9b | Michael Hanselmann | if name in ndata and KEY_BOOT_ID in ndata[name]: |
307 | 7b195d9b | Michael Hanselmann | return ndata[name][KEY_BOOT_ID]
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308 | 5a3103e9 | Michael Hanselmann | return None |
309 | 5a3103e9 | Michael Hanselmann | |
310 | 5a3103e9 | Michael Hanselmann | def SetNodeBootID(self, name, bootid): |
311 | 5a3103e9 | Michael Hanselmann | """Sets the boot ID of a node.
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312 | 5a3103e9 | Michael Hanselmann |
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313 | 5a3103e9 | Michael Hanselmann | """
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314 | 5a3103e9 | Michael Hanselmann | assert bootid
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315 | a8083063 | Iustin Pop | |
316 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
317 | a8083063 | Iustin Pop | |
318 | 5a3103e9 | Michael Hanselmann | if name not in ndata: |
319 | 5a3103e9 | Michael Hanselmann | ndata[name] = {} |
320 | 5a3103e9 | Michael Hanselmann | |
321 | 7b195d9b | Michael Hanselmann | ndata[name][KEY_BOOT_ID] = bootid |
322 | 5a3103e9 | Michael Hanselmann | |
323 | 5a3103e9 | Michael Hanselmann | def NumberOfRestartAttempts(self, instance): |
324 | a8083063 | Iustin Pop | """Returns number of previous restart attempts.
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325 | a8083063 | Iustin Pop |
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326 | c41eea6e | Iustin Pop | @type instance: L{Instance}
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327 | c41eea6e | Iustin Pop | @param instance: the instance to look up
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328 | 38242904 | Iustin Pop |
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329 | a8083063 | Iustin Pop | """
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330 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
331 | a8083063 | Iustin Pop | |
332 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
333 | 7b195d9b | Michael Hanselmann | return idata[instance.name][KEY_RESTART_COUNT]
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334 | a8083063 | Iustin Pop | |
335 | a8083063 | Iustin Pop | return 0 |
336 | a8083063 | Iustin Pop | |
337 | f5116c87 | Iustin Pop | def MaintainInstanceList(self, instances): |
338 | f5116c87 | Iustin Pop | """Perform maintenance on the recorded instances.
|
339 | f5116c87 | Iustin Pop |
|
340 | f5116c87 | Iustin Pop | @type instances: list of string
|
341 | f5116c87 | Iustin Pop | @param instances: the list of currently existing instances
|
342 | f5116c87 | Iustin Pop |
|
343 | f5116c87 | Iustin Pop | """
|
344 | f5116c87 | Iustin Pop | idict = self._data["instance"] |
345 | f5116c87 | Iustin Pop | # First, delete obsolete instances
|
346 | f5116c87 | Iustin Pop | obsolete_instances = set(idict).difference(instances)
|
347 | f5116c87 | Iustin Pop | for inst in obsolete_instances: |
348 | f5116c87 | Iustin Pop | logging.debug("Forgetting obsolete instance %s", inst)
|
349 | f5116c87 | Iustin Pop | del idict[inst]
|
350 | f5116c87 | Iustin Pop | |
351 | f5116c87 | Iustin Pop | # Second, delete expired records
|
352 | f5116c87 | Iustin Pop | earliest = time.time() - RETRY_EXPIRATION |
353 | f5116c87 | Iustin Pop | expired_instances = [i for i in idict |
354 | f5116c87 | Iustin Pop | if idict[i][KEY_RESTART_WHEN] < earliest]
|
355 | f5116c87 | Iustin Pop | for inst in expired_instances: |
356 | f5116c87 | Iustin Pop | logging.debug("Expiring record for instance %s", inst)
|
357 | f5116c87 | Iustin Pop | del idict[inst]
|
358 | f5116c87 | Iustin Pop | |
359 | 5a3103e9 | Michael Hanselmann | def RecordRestartAttempt(self, instance): |
360 | a8083063 | Iustin Pop | """Record a restart attempt.
|
361 | a8083063 | Iustin Pop |
|
362 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
363 | c41eea6e | Iustin Pop | @param instance: the instance being restarted
|
364 | 38242904 | Iustin Pop |
|
365 | a8083063 | Iustin Pop | """
|
366 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
367 | a8083063 | Iustin Pop | |
368 | 5a3103e9 | Michael Hanselmann | if instance.name not in idata: |
369 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] = {} |
370 | 5a3103e9 | Michael Hanselmann | else:
|
371 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] |
372 | a8083063 | Iustin Pop | |
373 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_WHEN] = time.time() |
374 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_COUNT] = inst.get(KEY_RESTART_COUNT, 0) + 1 |
375 | a8083063 | Iustin Pop | |
376 | 5a3103e9 | Michael Hanselmann | def RemoveInstance(self, instance): |
377 | c41eea6e | Iustin Pop | """Update state to reflect that a machine is running.
|
378 | a8083063 | Iustin Pop |
|
379 | c41eea6e | Iustin Pop | This method removes the record for a named instance (as we only
|
380 | c41eea6e | Iustin Pop | track down instances).
|
381 | a8083063 | Iustin Pop |
|
382 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
383 | c41eea6e | Iustin Pop | @param instance: the instance to remove from books
|
384 | 38242904 | Iustin Pop |
|
385 | a8083063 | Iustin Pop | """
|
386 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
387 | a8083063 | Iustin Pop | |
388 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
389 | 5a3103e9 | Michael Hanselmann | del idata[instance.name]
|
390 | a8083063 | Iustin Pop | |
391 | a8083063 | Iustin Pop | |
392 | a8083063 | Iustin Pop | class Instance(object): |
393 | a8083063 | Iustin Pop | """Abstraction for a Virtual Machine instance.
|
394 | a8083063 | Iustin Pop |
|
395 | a8083063 | Iustin Pop | """
|
396 | 83e5e26f | René Nussbaumer | def __init__(self, name, state, autostart, snodes): |
397 | a8083063 | Iustin Pop | self.name = name
|
398 | a8083063 | Iustin Pop | self.state = state
|
399 | 5a3103e9 | Michael Hanselmann | self.autostart = autostart
|
400 | 83e5e26f | René Nussbaumer | self.snodes = snodes
|
401 | a8083063 | Iustin Pop | |
402 | a8083063 | Iustin Pop | def Restart(self): |
403 | 3ecf6786 | Iustin Pop | """Encapsulates the start of an instance.
|
404 | 3ecf6786 | Iustin Pop |
|
405 | 3ecf6786 | Iustin Pop | """
|
406 | c873d91c | Iustin Pop | op = opcodes.OpInstanceStartup(instance_name=self.name, force=False) |
407 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
408 | a8083063 | Iustin Pop | |
409 | 5a3103e9 | Michael Hanselmann | def ActivateDisks(self): |
410 | 5a3103e9 | Michael Hanselmann | """Encapsulates the activation of all disks of an instance.
|
411 | 5a3103e9 | Michael Hanselmann |
|
412 | 5a3103e9 | Michael Hanselmann | """
|
413 | 83f5d475 | Iustin Pop | op = opcodes.OpInstanceActivateDisks(instance_name=self.name)
|
414 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
415 | a8083063 | Iustin Pop | |
416 | a8083063 | Iustin Pop | |
417 | 6dfcc47b | Iustin Pop | def GetClusterData(): |
418 | 5a3103e9 | Michael Hanselmann | """Get a list of instances on this cluster.
|
419 | 5a3103e9 | Michael Hanselmann |
|
420 | 5a3103e9 | Michael Hanselmann | """
|
421 | 6dfcc47b | Iustin Pop | op1_fields = ["name", "status", "admin_state", "snodes"] |
422 | f2af0bec | Iustin Pop | op1 = opcodes.OpInstanceQuery(output_fields=op1_fields, names=[], |
423 | f2af0bec | Iustin Pop | use_locking=True)
|
424 | 6dfcc47b | Iustin Pop | op2_fields = ["name", "bootid", "offline"] |
425 | 2237687b | Iustin Pop | op2 = opcodes.OpNodeQuery(output_fields=op2_fields, names=[], |
426 | 2237687b | Iustin Pop | use_locking=True)
|
427 | a8083063 | Iustin Pop | |
428 | 6dfcc47b | Iustin Pop | job_id = client.SubmitJob([op1, op2]) |
429 | a8083063 | Iustin Pop | |
430 | 6dfcc47b | Iustin Pop | all_results = cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
431 | 5a3103e9 | Michael Hanselmann | |
432 | 78f44650 | Iustin Pop | logging.debug("Got data from cluster, writing instance status file")
|
433 | 78f44650 | Iustin Pop | |
434 | 6dfcc47b | Iustin Pop | result = all_results[0]
|
435 | 6dfcc47b | Iustin Pop | smap = {} |
436 | 5a3103e9 | Michael Hanselmann | |
437 | 6dfcc47b | Iustin Pop | instances = {} |
438 | 78f44650 | Iustin Pop | |
439 | 78f44650 | Iustin Pop | # write the upfile
|
440 | 78f44650 | Iustin Pop | up_data = "".join(["%s %s\n" % (fields[0], fields[1]) for fields in result]) |
441 | 78f44650 | Iustin Pop | utils.WriteFile(file_name=constants.INSTANCE_UPFILE, data=up_data) |
442 | 78f44650 | Iustin Pop | |
443 | 6dfcc47b | Iustin Pop | for fields in result: |
444 | 6dfcc47b | Iustin Pop | (name, status, autostart, snodes) = fields |
445 | 5a3103e9 | Michael Hanselmann | |
446 | 6dfcc47b | Iustin Pop | # update the secondary node map
|
447 | 6dfcc47b | Iustin Pop | for node in snodes: |
448 | 6dfcc47b | Iustin Pop | if node not in smap: |
449 | 6dfcc47b | Iustin Pop | smap[node] = [] |
450 | 6dfcc47b | Iustin Pop | smap[node].append(name) |
451 | a8083063 | Iustin Pop | |
452 | 83e5e26f | René Nussbaumer | instances[name] = Instance(name, status, autostart, snodes) |
453 | 5a3103e9 | Michael Hanselmann | |
454 | 6dfcc47b | Iustin Pop | nodes = dict([(name, (bootid, offline))
|
455 | 6dfcc47b | Iustin Pop | for name, bootid, offline in all_results[1]]) |
456 | 5a3103e9 | Michael Hanselmann | |
457 | 6dfcc47b | Iustin Pop | client.ArchiveJob(job_id) |
458 | 5a3103e9 | Michael Hanselmann | |
459 | 6dfcc47b | Iustin Pop | return instances, nodes, smap
|
460 | a8083063 | Iustin Pop | |
461 | a8083063 | Iustin Pop | |
462 | 5a3103e9 | Michael Hanselmann | class Watcher(object): |
463 | 55c85950 | Iustin Pop | """Encapsulate the logic for restarting erroneously halted virtual machines.
|
464 | a8083063 | Iustin Pop |
|
465 | a8083063 | Iustin Pop | The calling program should periodically instantiate me and call Run().
|
466 | a8083063 | Iustin Pop | This will traverse the list of instances, and make up to MAXTRIES attempts
|
467 | a8083063 | Iustin Pop | to restart machines that are down.
|
468 | 38242904 | Iustin Pop |
|
469 | a8083063 | Iustin Pop | """
|
470 | cc962d58 | Iustin Pop | def __init__(self, opts, notepad): |
471 | cc962d58 | Iustin Pop | self.notepad = notepad
|
472 | 2859b87b | Michael Hanselmann | master = client.QueryConfigValues(["master_node"])[0] |
473 | b705c7a6 | Manuel Franceschini | if master != netutils.Hostname.GetSysName():
|
474 | 3ecf6786 | Iustin Pop | raise NotMasterError("This is not the master node") |
475 | 24edc6d4 | Iustin Pop | # first archive old jobs
|
476 | 24edc6d4 | Iustin Pop | self.ArchiveJobs(opts.job_age)
|
477 | 24edc6d4 | Iustin Pop | # and only then submit new ones
|
478 | 6dfcc47b | Iustin Pop | self.instances, self.bootids, self.smap = GetClusterData() |
479 | eee1fa2d | Iustin Pop | self.started_instances = set() |
480 | f07521e5 | Iustin Pop | self.opts = opts
|
481 | a8083063 | Iustin Pop | |
482 | a8083063 | Iustin Pop | def Run(self): |
483 | cc962d58 | Iustin Pop | """Watcher run sequence.
|
484 | cc962d58 | Iustin Pop |
|
485 | cc962d58 | Iustin Pop | """
|
486 | cc962d58 | Iustin Pop | notepad = self.notepad
|
487 | cc962d58 | Iustin Pop | self.CheckInstances(notepad)
|
488 | cc962d58 | Iustin Pop | self.CheckDisks(notepad)
|
489 | cc962d58 | Iustin Pop | self.VerifyDisks()
|
490 | 5a3103e9 | Michael Hanselmann | |
491 | 24edc6d4 | Iustin Pop | @staticmethod
|
492 | 24edc6d4 | Iustin Pop | def ArchiveJobs(age): |
493 | f07521e5 | Iustin Pop | """Archive old jobs.
|
494 | f07521e5 | Iustin Pop |
|
495 | f07521e5 | Iustin Pop | """
|
496 | f07521e5 | Iustin Pop | arch_count, left_count = client.AutoArchiveJobs(age) |
497 | 07b8a2b5 | Iustin Pop | logging.debug("Archived %s jobs, left %s", arch_count, left_count)
|
498 | f07521e5 | Iustin Pop | |
499 | 5a3103e9 | Michael Hanselmann | def CheckDisks(self, notepad): |
500 | 5a3103e9 | Michael Hanselmann | """Check all nodes for restarted ones.
|
501 | 38242904 | Iustin Pop |
|
502 | a8083063 | Iustin Pop | """
|
503 | 5a3103e9 | Michael Hanselmann | check_nodes = [] |
504 | cbfc4681 | Iustin Pop | for name, (new_id, offline) in self.bootids.iteritems(): |
505 | 5a3103e9 | Michael Hanselmann | old = notepad.GetNodeBootID(name) |
506 | 37b77b18 | Iustin Pop | if new_id is None: |
507 | 37b77b18 | Iustin Pop | # Bad node, not returning a boot id
|
508 | cbfc4681 | Iustin Pop | if not offline: |
509 | cbfc4681 | Iustin Pop | logging.debug("Node %s missing boot id, skipping secondary checks",
|
510 | cbfc4681 | Iustin Pop | name) |
511 | 37b77b18 | Iustin Pop | continue
|
512 | 26517d45 | Iustin Pop | if old != new_id:
|
513 | 5a3103e9 | Michael Hanselmann | # Node's boot ID has changed, proably through a reboot.
|
514 | 5a3103e9 | Michael Hanselmann | check_nodes.append(name) |
515 | 5a3103e9 | Michael Hanselmann | |
516 | 5a3103e9 | Michael Hanselmann | if check_nodes:
|
517 | 5a3103e9 | Michael Hanselmann | # Activate disks for all instances with any of the checked nodes as a
|
518 | 5a3103e9 | Michael Hanselmann | # secondary node.
|
519 | 6dfcc47b | Iustin Pop | for node in check_nodes: |
520 | 6dfcc47b | Iustin Pop | if node not in self.smap: |
521 | eee1fa2d | Iustin Pop | continue
|
522 | 6dfcc47b | Iustin Pop | for instance_name in self.smap[node]: |
523 | 6dfcc47b | Iustin Pop | instance = self.instances[instance_name]
|
524 | 6dfcc47b | Iustin Pop | if not instance.autostart: |
525 | 6dfcc47b | Iustin Pop | logging.info(("Skipping disk activation for non-autostart"
|
526 | 6dfcc47b | Iustin Pop | " instance %s"), instance.name)
|
527 | 6dfcc47b | Iustin Pop | continue
|
528 | 6dfcc47b | Iustin Pop | if instance.name in self.started_instances: |
529 | 6dfcc47b | Iustin Pop | # we already tried to start the instance, which should have
|
530 | 6dfcc47b | Iustin Pop | # activated its drives (if they can be at all)
|
531 | 604c175c | Iustin Pop | logging.debug("Skipping disk activation for instance %s, as"
|
532 | 604c175c | Iustin Pop | " it was already started", instance.name)
|
533 | 6dfcc47b | Iustin Pop | continue
|
534 | 6dfcc47b | Iustin Pop | try:
|
535 | 6dfcc47b | Iustin Pop | logging.info("Activating disks for instance %s", instance.name)
|
536 | 6dfcc47b | Iustin Pop | instance.ActivateDisks() |
537 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
538 | 6dfcc47b | Iustin Pop | logging.exception("Error while activating disks for instance %s",
|
539 | 6dfcc47b | Iustin Pop | instance.name) |
540 | 5a3103e9 | Michael Hanselmann | |
541 | 5a3103e9 | Michael Hanselmann | # Keep changed boot IDs
|
542 | 5a3103e9 | Michael Hanselmann | for name in check_nodes: |
543 | 3448aa22 | Iustin Pop | notepad.SetNodeBootID(name, self.bootids[name][0]) |
544 | a8083063 | Iustin Pop | |
545 | 5a3103e9 | Michael Hanselmann | def CheckInstances(self, notepad): |
546 | 5a3103e9 | Michael Hanselmann | """Make a pass over the list of instances, restarting downed ones.
|
547 | 5a3103e9 | Michael Hanselmann |
|
548 | 5a3103e9 | Michael Hanselmann | """
|
549 | f5116c87 | Iustin Pop | notepad.MaintainInstanceList(self.instances.keys())
|
550 | f5116c87 | Iustin Pop | |
551 | 6dfcc47b | Iustin Pop | for instance in self.instances.values(): |
552 | a8083063 | Iustin Pop | if instance.state in BAD_STATES: |
553 | 5a3103e9 | Michael Hanselmann | n = notepad.NumberOfRestartAttempts(instance) |
554 | a8083063 | Iustin Pop | |
555 | a8083063 | Iustin Pop | if n > MAXTRIES:
|
556 | f5116c87 | Iustin Pop | logging.warning("Not restarting instance %s, retries exhausted",
|
557 | f5116c87 | Iustin Pop | instance.name) |
558 | a8083063 | Iustin Pop | continue
|
559 | a8083063 | Iustin Pop | elif n < MAXTRIES:
|
560 | a8083063 | Iustin Pop | last = " (Attempt #%d)" % (n + 1) |
561 | a8083063 | Iustin Pop | else:
|
562 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
563 | 438b45d4 | Michael Hanselmann | logging.error("Could not restart %s after %d attempts, giving up",
|
564 | 438b45d4 | Michael Hanselmann | instance.name, MAXTRIES) |
565 | a8083063 | Iustin Pop | continue
|
566 | a8083063 | Iustin Pop | try:
|
567 | 604c175c | Iustin Pop | logging.info("Restarting %s%s", instance.name, last)
|
568 | a8083063 | Iustin Pop | instance.Restart() |
569 | eee1fa2d | Iustin Pop | self.started_instances.add(instance.name)
|
570 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
571 | 4bffa7f7 | Iustin Pop | logging.exception("Error while restarting instance %s",
|
572 | 4bffa7f7 | Iustin Pop | instance.name) |
573 | a8083063 | Iustin Pop | |
574 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
575 | a8083063 | Iustin Pop | elif instance.state in HELPLESS_STATES: |
576 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
577 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
578 | a8083063 | Iustin Pop | else:
|
579 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
580 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
581 | 438b45d4 | Michael Hanselmann | logging.info("Restart of %s succeeded", instance.name)
|
582 | a8083063 | Iustin Pop | |
583 | 83e5e26f | René Nussbaumer | def _CheckForOfflineNodes(self, instance): |
584 | 83e5e26f | René Nussbaumer | """Checks if given instances has any secondary in offline status.
|
585 | 83e5e26f | René Nussbaumer |
|
586 | 83e5e26f | René Nussbaumer | @param instance: The instance object
|
587 | 83e5e26f | René Nussbaumer | @return: True if any of the secondary is offline, False otherwise
|
588 | 83e5e26f | René Nussbaumer |
|
589 | 83e5e26f | René Nussbaumer | """
|
590 | 83e5e26f | René Nussbaumer | bootids = [] |
591 | 83e5e26f | René Nussbaumer | for node in instance.snodes: |
592 | 83e5e26f | René Nussbaumer | bootids.append(self.bootids[node])
|
593 | 83e5e26f | René Nussbaumer | |
594 | 83e5e26f | René Nussbaumer | return compat.any(offline for (_, offline) in bootids) |
595 | 83e5e26f | René Nussbaumer | |
596 | 83e5e26f | René Nussbaumer | def VerifyDisks(self): |
597 | d2f311db | Iustin Pop | """Run gnt-cluster verify-disks.
|
598 | d2f311db | Iustin Pop |
|
599 | d2f311db | Iustin Pop | """
|
600 | ae1a845c | Michael Hanselmann | job_id = client.SubmitJob([opcodes.OpClusterVerifyDisks()]) |
601 | 6dfcc47b | Iustin Pop | result = cli.PollJob(job_id, cl=client, feedback_fn=logging.debug)[0]
|
602 | 6dfcc47b | Iustin Pop | client.ArchiveJob(job_id) |
603 | ae1a845c | Michael Hanselmann | |
604 | ae1a845c | Michael Hanselmann | # Keep track of submitted jobs
|
605 | ae1a845c | Michael Hanselmann | jex = cli.JobExecutor(cl=client, feedback_fn=logging.debug) |
606 | ae1a845c | Michael Hanselmann | |
607 | ae1a845c | Michael Hanselmann | archive_jobs = set()
|
608 | ae1a845c | Michael Hanselmann | for (status, job_id) in result[constants.JOB_IDS_KEY]: |
609 | ae1a845c | Michael Hanselmann | jex.AddJobId(None, status, job_id)
|
610 | ae1a845c | Michael Hanselmann | if status:
|
611 | ae1a845c | Michael Hanselmann | archive_jobs.add(job_id) |
612 | ae1a845c | Michael Hanselmann | |
613 | ae1a845c | Michael Hanselmann | offline_disk_instances = set()
|
614 | ae1a845c | Michael Hanselmann | |
615 | ae1a845c | Michael Hanselmann | for (status, result) in jex.GetResults(): |
616 | ae1a845c | Michael Hanselmann | if not status: |
617 | ae1a845c | Michael Hanselmann | logging.error("Verify-disks job failed: %s", result)
|
618 | ae1a845c | Michael Hanselmann | continue
|
619 | ae1a845c | Michael Hanselmann | |
620 | ae1a845c | Michael Hanselmann | ((_, instances, _), ) = result |
621 | ae1a845c | Michael Hanselmann | |
622 | ae1a845c | Michael Hanselmann | offline_disk_instances.update(instances) |
623 | ae1a845c | Michael Hanselmann | |
624 | ae1a845c | Michael Hanselmann | for job_id in archive_jobs: |
625 | ae1a845c | Michael Hanselmann | client.ArchiveJob(job_id) |
626 | ae1a845c | Michael Hanselmann | |
627 | 5188ab37 | Iustin Pop | if not offline_disk_instances: |
628 | 5188ab37 | Iustin Pop | # nothing to do
|
629 | 604c175c | Iustin Pop | logging.debug("verify-disks reported no offline disks, nothing to do")
|
630 | 5188ab37 | Iustin Pop | return
|
631 | ae1a845c | Michael Hanselmann | |
632 | 604c175c | Iustin Pop | logging.debug("Will activate disks for instance(s) %s",
|
633 | 1f864b60 | Iustin Pop | utils.CommaJoin(offline_disk_instances)) |
634 | ae1a845c | Michael Hanselmann | |
635 | 5188ab37 | Iustin Pop | # we submit only one job, and wait for it. not optimal, but spams
|
636 | 5188ab37 | Iustin Pop | # less the job queue
|
637 | 83e5e26f | René Nussbaumer | job = [] |
638 | 83e5e26f | René Nussbaumer | for name in offline_disk_instances: |
639 | 83e5e26f | René Nussbaumer | instance = self.instances[name]
|
640 | 83e5e26f | René Nussbaumer | if (instance.state in HELPLESS_STATES or |
641 | 83e5e26f | René Nussbaumer | self._CheckForOfflineNodes(instance)):
|
642 | 83e5e26f | René Nussbaumer | logging.info("Skip instance %s because it is in helpless state or has"
|
643 | 83e5e26f | René Nussbaumer | " one offline secondary", name)
|
644 | 83e5e26f | René Nussbaumer | continue
|
645 | 83e5e26f | René Nussbaumer | job.append(opcodes.OpInstanceActivateDisks(instance_name=name)) |
646 | 5188ab37 | Iustin Pop | |
647 | 83e5e26f | René Nussbaumer | if job:
|
648 | 83e5e26f | René Nussbaumer | job_id = cli.SendJob(job, cl=client) |
649 | 83e5e26f | René Nussbaumer | |
650 | 83e5e26f | René Nussbaumer | try:
|
651 | 83e5e26f | René Nussbaumer | cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
652 | 83e5e26f | René Nussbaumer | except Exception: # pylint: disable-msg=W0703 |
653 | 83e5e26f | René Nussbaumer | logging.exception("Error while activating disks")
|
654 | a8083063 | Iustin Pop | |
655 | a8083063 | Iustin Pop | |
656 | 001b3825 | Michael Hanselmann | def OpenStateFile(path): |
657 | 001b3825 | Michael Hanselmann | """Opens the state file and acquires a lock on it.
|
658 | 001b3825 | Michael Hanselmann |
|
659 | 001b3825 | Michael Hanselmann | @type path: string
|
660 | 001b3825 | Michael Hanselmann | @param path: Path to state file
|
661 | 001b3825 | Michael Hanselmann |
|
662 | 001b3825 | Michael Hanselmann | """
|
663 | 001b3825 | Michael Hanselmann | # The two-step dance below is necessary to allow both opening existing
|
664 | 001b3825 | Michael Hanselmann | # file read/write and creating if not existing. Vanilla open will truncate
|
665 | 001b3825 | Michael Hanselmann | # an existing file -or- allow creating if not existing.
|
666 | 001b3825 | Michael Hanselmann | statefile_fd = os.open(path, os.O_RDWR | os.O_CREAT) |
667 | 001b3825 | Michael Hanselmann | |
668 | 001b3825 | Michael Hanselmann | # Try to acquire lock on state file. If this fails, another watcher instance
|
669 | 001b3825 | Michael Hanselmann | # might already be running or another program is temporarily blocking the
|
670 | 001b3825 | Michael Hanselmann | # watcher from running.
|
671 | 001b3825 | Michael Hanselmann | try:
|
672 | 001b3825 | Michael Hanselmann | utils.LockFile(statefile_fd) |
673 | 001b3825 | Michael Hanselmann | except errors.LockError, err:
|
674 | 001b3825 | Michael Hanselmann | logging.error("Can't acquire lock on state file %s: %s", path, err)
|
675 | 001b3825 | Michael Hanselmann | return None |
676 | 001b3825 | Michael Hanselmann | |
677 | 001b3825 | Michael Hanselmann | return os.fdopen(statefile_fd, "w+") |
678 | 001b3825 | Michael Hanselmann | |
679 | 001b3825 | Michael Hanselmann | |
680 | db147305 | Tom Limoncelli | def IsRapiResponding(hostname): |
681 | db147305 | Tom Limoncelli | """Connects to RAPI port and does a simple test.
|
682 | db147305 | Tom Limoncelli |
|
683 | db147305 | Tom Limoncelli | Connects to RAPI port of hostname and does a simple test. At this time, the
|
684 | db147305 | Tom Limoncelli | test is GetVersion.
|
685 | db147305 | Tom Limoncelli |
|
686 | db147305 | Tom Limoncelli | @type hostname: string
|
687 | db147305 | Tom Limoncelli | @param hostname: hostname of the node to connect to.
|
688 | db147305 | Tom Limoncelli | @rtype: bool
|
689 | db147305 | Tom Limoncelli | @return: Whether RAPI is working properly
|
690 | db147305 | Tom Limoncelli |
|
691 | db147305 | Tom Limoncelli | """
|
692 | 34f06005 | Iustin Pop | curl_config = rapi.client.GenericCurlConfig() |
693 | 2a7c3583 | Michael Hanselmann | rapi_client = rapi.client.GanetiRapiClient(hostname, |
694 | 2a7c3583 | Michael Hanselmann | curl_config_fn=curl_config) |
695 | db147305 | Tom Limoncelli | try:
|
696 | db147305 | Tom Limoncelli | master_version = rapi_client.GetVersion() |
697 | db147305 | Tom Limoncelli | except rapi.client.CertificateError, err:
|
698 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: CertificateError (%s)", err)
|
699 | db147305 | Tom Limoncelli | return False |
700 | db147305 | Tom Limoncelli | except rapi.client.GanetiApiError, err:
|
701 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: GanetiApiError (%s)", err)
|
702 | db147305 | Tom Limoncelli | return False |
703 | db147305 | Tom Limoncelli | logging.debug("RAPI Result: master_version is %s", master_version)
|
704 | db147305 | Tom Limoncelli | return master_version == constants.RAPI_VERSION
|
705 | db147305 | Tom Limoncelli | |
706 | db147305 | Tom Limoncelli | |
707 | a8083063 | Iustin Pop | def ParseOptions(): |
708 | a8083063 | Iustin Pop | """Parse the command line options.
|
709 | a8083063 | Iustin Pop |
|
710 | c41eea6e | Iustin Pop | @return: (options, args) as from OptionParser.parse_args()
|
711 | a8083063 | Iustin Pop |
|
712 | a8083063 | Iustin Pop | """
|
713 | a8083063 | Iustin Pop | parser = OptionParser(description="Ganeti cluster watcher",
|
714 | a8083063 | Iustin Pop | usage="%prog [-d]",
|
715 | a8083063 | Iustin Pop | version="%%prog (ganeti) %s" %
|
716 | a8083063 | Iustin Pop | constants.RELEASE_VERSION) |
717 | a8083063 | Iustin Pop | |
718 | 6d4e8ec0 | Iustin Pop | parser.add_option(cli.DEBUG_OPT) |
719 | f0a80b01 | Michael Hanselmann | parser.add_option("-A", "--job-age", dest="job_age", default=6 * 3600, |
720 | f07521e5 | Iustin Pop | help="Autoarchive jobs older than this age (default"
|
721 | f0a80b01 | Michael Hanselmann | " 6 hours)")
|
722 | 46c8a6ab | Iustin Pop | parser.add_option("--ignore-pause", dest="ignore_pause", default=False, |
723 | 46c8a6ab | Iustin Pop | action="store_true", help="Ignore cluster pause setting") |
724 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
725 | f07521e5 | Iustin Pop | options.job_age = cli.ParseTimespec(options.job_age) |
726 | f0a80b01 | Michael Hanselmann | |
727 | f0a80b01 | Michael Hanselmann | if args:
|
728 | f0a80b01 | Michael Hanselmann | parser.error("No arguments expected")
|
729 | f0a80b01 | Michael Hanselmann | |
730 | f0a80b01 | Michael Hanselmann | return (options, args)
|
731 | a8083063 | Iustin Pop | |
732 | a8083063 | Iustin Pop | |
733 | 2a7c3583 | Michael Hanselmann | @rapi.client.UsesRapiClient
|
734 | 9f4bb951 | Michael Hanselmann | def Main(): |
735 | a8083063 | Iustin Pop | """Main function.
|
736 | a8083063 | Iustin Pop |
|
737 | a8083063 | Iustin Pop | """
|
738 | 7260cfbe | Iustin Pop | global client # pylint: disable-msg=W0603 |
739 | e125c67c | Michael Hanselmann | |
740 | f0a80b01 | Michael Hanselmann | (options, _) = ParseOptions() |
741 | a8083063 | Iustin Pop | |
742 | cfcc79c6 | Michael Hanselmann | utils.SetupLogging(constants.LOG_WATCHER, sys.argv[0],
|
743 | cfcc79c6 | Michael Hanselmann | debug=options.debug, stderr_logging=options.debug) |
744 | a8083063 | Iustin Pop | |
745 | 46c8a6ab | Iustin Pop | if ShouldPause() and not options.ignore_pause: |
746 | 3753b2cb | Michael Hanselmann | logging.debug("Pause has been set, exiting")
|
747 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
748 | 3753b2cb | Michael Hanselmann | |
749 | 001b3825 | Michael Hanselmann | statefile = OpenStateFile(constants.WATCHER_STATEFILE) |
750 | 001b3825 | Michael Hanselmann | if not statefile: |
751 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
752 | 001b3825 | Michael Hanselmann | |
753 | 24edc6d4 | Iustin Pop | update_file = False
|
754 | a8083063 | Iustin Pop | try:
|
755 | f1115454 | Guido Trotter | StartNodeDaemons() |
756 | 9e289e36 | Guido Trotter | RunWatcherHooks() |
757 | 50273051 | Iustin Pop | # run node maintenance in all cases, even if master, so that old
|
758 | 50273051 | Iustin Pop | # masters can be properly cleaned up too
|
759 | 50273051 | Iustin Pop | if NodeMaintenance.ShouldRun():
|
760 | 50273051 | Iustin Pop | NodeMaintenance().Exec() |
761 | c4f0219c | Iustin Pop | |
762 | 001b3825 | Michael Hanselmann | notepad = WatcherState(statefile) |
763 | 781b2b2b | Michael Hanselmann | try:
|
764 | 2c404217 | Iustin Pop | try:
|
765 | 2c404217 | Iustin Pop | client = cli.GetClient() |
766 | 2c404217 | Iustin Pop | except errors.OpPrereqError:
|
767 | 2c404217 | Iustin Pop | # this is, from cli.GetClient, a not-master case
|
768 | 7dfb83c2 | Iustin Pop | logging.debug("Not on master, exiting")
|
769 | 24edc6d4 | Iustin Pop | update_file = True
|
770 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
771 | 7dfb83c2 | Iustin Pop | except luxi.NoMasterError, err:
|
772 | 7dfb83c2 | Iustin Pop | logging.warning("Master seems to be down (%s), trying to restart",
|
773 | 7dfb83c2 | Iustin Pop | str(err))
|
774 | 2826b361 | Guido Trotter | if not utils.EnsureDaemon(constants.MASTERD): |
775 | 7dfb83c2 | Iustin Pop | logging.critical("Can't start the master, exiting")
|
776 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
777 | 7dfb83c2 | Iustin Pop | # else retry the connection
|
778 | 7dfb83c2 | Iustin Pop | client = cli.GetClient() |
779 | cc962d58 | Iustin Pop | |
780 | 83052f9e | Guido Trotter | # we are on master now
|
781 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.RAPI) |
782 | c4f0219c | Iustin Pop | |
783 | db147305 | Tom Limoncelli | # If RAPI isn't responding to queries, try one restart.
|
784 | db147305 | Tom Limoncelli | logging.debug("Attempting to talk with RAPI.")
|
785 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
786 | db147305 | Tom Limoncelli | logging.warning("Couldn't get answer from Ganeti RAPI daemon."
|
787 | db147305 | Tom Limoncelli | " Restarting Ganeti RAPI.")
|
788 | db147305 | Tom Limoncelli | utils.StopDaemon(constants.RAPI) |
789 | db147305 | Tom Limoncelli | utils.EnsureDaemon(constants.RAPI) |
790 | db147305 | Tom Limoncelli | logging.debug("Second attempt to talk with RAPI")
|
791 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
792 | db147305 | Tom Limoncelli | logging.fatal("RAPI is not responding. Please investigate.")
|
793 | db147305 | Tom Limoncelli | logging.debug("Successfully talked to RAPI.")
|
794 | db147305 | Tom Limoncelli | |
795 | cc962d58 | Iustin Pop | try:
|
796 | cc962d58 | Iustin Pop | watcher = Watcher(options, notepad) |
797 | cc962d58 | Iustin Pop | except errors.ConfigurationError:
|
798 | cc962d58 | Iustin Pop | # Just exit if there's no configuration
|
799 | 24edc6d4 | Iustin Pop | update_file = True
|
800 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
801 | e125c67c | Michael Hanselmann | |
802 | cc962d58 | Iustin Pop | watcher.Run() |
803 | 24edc6d4 | Iustin Pop | update_file = True
|
804 | 24edc6d4 | Iustin Pop | |
805 | cc962d58 | Iustin Pop | finally:
|
806 | 7dfb83c2 | Iustin Pop | if update_file:
|
807 | 7dfb83c2 | Iustin Pop | notepad.Save() |
808 | 7dfb83c2 | Iustin Pop | else:
|
809 | 7dfb83c2 | Iustin Pop | logging.debug("Not updating status file due to failure")
|
810 | 1b052f42 | Michael Hanselmann | except SystemExit: |
811 | 1b052f42 | Michael Hanselmann | raise
|
812 | 38242904 | Iustin Pop | except NotMasterError:
|
813 | 438b45d4 | Michael Hanselmann | logging.debug("Not master, exiting")
|
814 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NOTMASTER
|
815 | 89e1fc26 | Iustin Pop | except errors.ResolverError, err:
|
816 | 438b45d4 | Michael Hanselmann | logging.error("Cannot resolve hostname '%s', exiting.", err.args[0]) |
817 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NODESETUP_ERROR
|
818 | 24edc6d4 | Iustin Pop | except errors.JobQueueFull:
|
819 | 24edc6d4 | Iustin Pop | logging.error("Job queue is full, can't query cluster state")
|
820 | 24edc6d4 | Iustin Pop | except errors.JobQueueDrainError:
|
821 | 24edc6d4 | Iustin Pop | logging.error("Job queue is drained, can't maintain cluster state")
|
822 | 438b45d4 | Michael Hanselmann | except Exception, err: |
823 | 001b3825 | Michael Hanselmann | logging.exception(str(err))
|
824 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
825 | 5a3103e9 | Michael Hanselmann | |
826 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS |