root / lib / watcher / __init__.py @ d1e9c98d
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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 | e125c67c | Michael Hanselmann | # Global 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 | 9e289e36 | Guido Trotter | except Exception, msg: # pylint: disable-msg=W0703 |
111 | 9e289e36 | Guido Trotter | logging.critical("RunParts %s failed: %s", hooks_dir, msg)
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112 | 9e289e36 | Guido Trotter | |
113 | 9e289e36 | Guido Trotter | for (relname, status, runresult) in results: |
114 | 9e289e36 | Guido Trotter | if status == constants.RUNPARTS_SKIP:
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115 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: skipped", relname)
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116 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_ERR:
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117 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: error (%s)", relname, runresult)
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118 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_RUN:
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119 | 9e289e36 | Guido Trotter | if runresult.failed:
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120 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: failed (exit: %d) (output: %s)",
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121 | 9e289e36 | Guido Trotter | relname, runresult.exit_code, runresult.output) |
122 | 9e289e36 | Guido Trotter | else:
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123 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: success (output: %s)", relname,
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124 | 9e289e36 | Guido Trotter | runresult.output) |
125 | 9e289e36 | Guido Trotter | |
126 | 001b3825 | Michael Hanselmann | |
127 | 50273051 | Iustin Pop | class NodeMaintenance(object): |
128 | 50273051 | Iustin Pop | """Talks to confd daemons and possible shutdown instances/drbd devices.
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129 | 50273051 | Iustin Pop |
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130 | 50273051 | Iustin Pop | """
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131 | 50273051 | Iustin Pop | def __init__(self): |
132 | 50273051 | Iustin Pop | self.store_cb = confd_client.StoreResultCallback()
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133 | 50273051 | Iustin Pop | self.filter_cb = confd_client.ConfdFilterCallback(self.store_cb) |
134 | 50273051 | Iustin Pop | self.confd_client = confd_client.GetConfdClient(self.filter_cb) |
135 | 50273051 | Iustin Pop | |
136 | 50273051 | Iustin Pop | @staticmethod
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137 | 50273051 | Iustin Pop | def ShouldRun(): |
138 | 50273051 | Iustin Pop | """Checks whether node maintenance should run.
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139 | 50273051 | Iustin Pop |
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140 | 50273051 | Iustin Pop | """
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141 | 50273051 | Iustin Pop | try:
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142 | 50273051 | Iustin Pop | return ssconf.SimpleStore().GetMaintainNodeHealth()
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143 | 50273051 | Iustin Pop | except errors.ConfigurationError, err:
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144 | 50273051 | Iustin Pop | logging.error("Configuration error, not activating node maintenance: %s",
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145 | 50273051 | Iustin Pop | err) |
146 | 50273051 | Iustin Pop | return False |
147 | 50273051 | Iustin Pop | |
148 | 50273051 | Iustin Pop | @staticmethod
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149 | 50273051 | Iustin Pop | def GetRunningInstances(): |
150 | 50273051 | Iustin Pop | """Compute list of hypervisor/running instances.
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151 | 50273051 | Iustin Pop |
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152 | 50273051 | Iustin Pop | """
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153 | 50273051 | Iustin Pop | hyp_list = ssconf.SimpleStore().GetHypervisorList() |
154 | 50273051 | Iustin Pop | results = [] |
155 | 50273051 | Iustin Pop | for hv_name in hyp_list: |
156 | 50273051 | Iustin Pop | try:
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157 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
158 | 50273051 | Iustin Pop | ilist = hv.ListInstances() |
159 | 50273051 | Iustin Pop | results.extend([(iname, hv_name) for iname in ilist]) |
160 | 50273051 | Iustin Pop | except: # pylint: disable-msg=W0702 |
161 | 50273051 | Iustin Pop | logging.error("Error while listing instances for hypervisor %s",
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162 | 50273051 | Iustin Pop | hv_name, exc_info=True)
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163 | 50273051 | Iustin Pop | return results
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164 | 50273051 | Iustin Pop | |
165 | 50273051 | Iustin Pop | @staticmethod
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166 | 50273051 | Iustin Pop | def GetUsedDRBDs(): |
167 | 50273051 | Iustin Pop | """Get list of used DRBD minors.
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168 | 50273051 | Iustin Pop |
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169 | 50273051 | Iustin Pop | """
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170 | 50273051 | Iustin Pop | return bdev.DRBD8.GetUsedDevs().keys()
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171 | 50273051 | Iustin Pop | |
172 | 50273051 | Iustin Pop | @classmethod
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173 | 50273051 | Iustin Pop | def DoMaintenance(cls, role): |
174 | 50273051 | Iustin Pop | """Maintain the instance list.
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175 | 50273051 | Iustin Pop |
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176 | 50273051 | Iustin Pop | """
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177 | 50273051 | Iustin Pop | if role == constants.CONFD_NODE_ROLE_OFFLINE:
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178 | 50273051 | Iustin Pop | inst_running = cls.GetRunningInstances() |
179 | 50273051 | Iustin Pop | cls.ShutdownInstances(inst_running) |
180 | 50273051 | Iustin Pop | drbd_running = cls.GetUsedDRBDs() |
181 | 50273051 | Iustin Pop | cls.ShutdownDRBD(drbd_running) |
182 | 50273051 | Iustin Pop | else:
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183 | 50273051 | Iustin Pop | logging.debug("Not doing anything for role %s", role)
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184 | 50273051 | Iustin Pop | |
185 | 50273051 | Iustin Pop | @staticmethod
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186 | 50273051 | Iustin Pop | def ShutdownInstances(inst_running): |
187 | 50273051 | Iustin Pop | """Shutdown running instances.
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188 | 50273051 | Iustin Pop |
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189 | 50273051 | Iustin Pop | """
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190 | 50273051 | Iustin Pop | names_running = set([i[0] for i in inst_running]) |
191 | 50273051 | Iustin Pop | if names_running:
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192 | 50273051 | Iustin Pop | logging.info("Following instances should not be running,"
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193 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(names_running))
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194 | 50273051 | Iustin Pop | # this dictionary will collapse duplicate instance names (only
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195 | 50273051 | Iustin Pop | # xen pvm/vhm) into a single key, which is fine
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196 | 50273051 | Iustin Pop | i2h = dict(inst_running)
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197 | 50273051 | Iustin Pop | for name in names_running: |
198 | 50273051 | Iustin Pop | hv_name = i2h[name] |
199 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
200 | 50273051 | Iustin Pop | hv.StopInstance(None, force=True, name=name) |
201 | 50273051 | Iustin Pop | |
202 | 50273051 | Iustin Pop | @staticmethod
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203 | 50273051 | Iustin Pop | def ShutdownDRBD(drbd_running): |
204 | 50273051 | Iustin Pop | """Shutdown active DRBD devices.
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205 | 50273051 | Iustin Pop |
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206 | 50273051 | Iustin Pop | """
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207 | 50273051 | Iustin Pop | if drbd_running:
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208 | 50273051 | Iustin Pop | logging.info("Following DRBD minors should not be active,"
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209 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(drbd_running))
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210 | 50273051 | Iustin Pop | for minor in drbd_running: |
211 | 50273051 | Iustin Pop | # pylint: disable-msg=W0212
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212 | 50273051 | Iustin Pop | # using the private method as is, pending enhancements to the DRBD
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213 | 50273051 | Iustin Pop | # interface
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214 | 50273051 | Iustin Pop | bdev.DRBD8._ShutdownAll(minor) |
215 | 50273051 | Iustin Pop | |
216 | 50273051 | Iustin Pop | def Exec(self): |
217 | 50273051 | Iustin Pop | """Check node status versus cluster desired state.
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218 | 50273051 | Iustin Pop |
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219 | 50273051 | Iustin Pop | """
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220 | b705c7a6 | Manuel Franceschini | my_name = netutils.Hostname.GetSysName() |
221 | 50273051 | Iustin Pop | req = confd_client.ConfdClientRequest(type= |
222 | 50273051 | Iustin Pop | constants.CONFD_REQ_NODE_ROLE_BYNAME, |
223 | 50273051 | Iustin Pop | query=my_name) |
224 | ebacb943 | Iustin Pop | self.confd_client.SendRequest(req, async=False, coverage=-1) |
225 | 50273051 | Iustin Pop | timed_out, _, _ = self.confd_client.WaitForReply(req.rsalt)
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226 | 50273051 | Iustin Pop | if not timed_out: |
227 | 50273051 | Iustin Pop | # should have a valid response
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228 | 50273051 | Iustin Pop | status, result = self.store_cb.GetResponse(req.rsalt)
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229 | 50273051 | Iustin Pop | assert status, "Missing result but received replies" |
230 | 50273051 | Iustin Pop | if not self.filter_cb.consistent[req.rsalt]: |
231 | 50273051 | Iustin Pop | logging.warning("Inconsistent replies, not doing anything")
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232 | 50273051 | Iustin Pop | return
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233 | 50273051 | Iustin Pop | self.DoMaintenance(result.server_reply.answer)
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234 | 50273051 | Iustin Pop | else:
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235 | 50273051 | Iustin Pop | logging.warning("Confd query timed out, cannot do maintenance actions")
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236 | 50273051 | Iustin Pop | |
237 | 50273051 | Iustin Pop | |
238 | 5a3103e9 | Michael Hanselmann | class WatcherState(object): |
239 | a8083063 | Iustin Pop | """Interface to a state file recording restart attempts.
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240 | a8083063 | Iustin Pop |
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241 | a8083063 | Iustin Pop | """
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242 | 001b3825 | Michael Hanselmann | def __init__(self, statefile): |
243 | 5a3103e9 | Michael Hanselmann | """Open, lock, read and parse the file.
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244 | 5a3103e9 | Michael Hanselmann |
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245 | 001b3825 | Michael Hanselmann | @type statefile: file
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246 | 001b3825 | Michael Hanselmann | @param statefile: State file object
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247 | 5a3103e9 | Michael Hanselmann |
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248 | 5a3103e9 | Michael Hanselmann | """
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249 | 001b3825 | Michael Hanselmann | self.statefile = statefile
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250 | a8083063 | Iustin Pop | |
251 | 5a3103e9 | Michael Hanselmann | try:
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252 | 2c404217 | Iustin Pop | state_data = self.statefile.read()
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253 | 2c404217 | Iustin Pop | if not state_data: |
254 | 2c404217 | Iustin Pop | self._data = {}
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255 | 2c404217 | Iustin Pop | else:
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256 | 2c404217 | Iustin Pop | self._data = serializer.Load(state_data)
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257 | 7260cfbe | Iustin Pop | except Exception, msg: # pylint: disable-msg=W0703 |
258 | 5a3103e9 | Michael Hanselmann | # Ignore errors while loading the file and treat it as empty
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259 | b76f660d | Michael Hanselmann | self._data = {}
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260 | 2c404217 | Iustin Pop | logging.warning(("Invalid state file. Using defaults."
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261 | 438b45d4 | Michael Hanselmann | " Error message: %s"), msg)
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262 | 5a3103e9 | Michael Hanselmann | |
263 | b76f660d | Michael Hanselmann | if "instance" not in self._data: |
264 | b76f660d | Michael Hanselmann | self._data["instance"] = {} |
265 | b76f660d | Michael Hanselmann | if "node" not in self._data: |
266 | b76f660d | Michael Hanselmann | self._data["node"] = {} |
267 | 5a3103e9 | Michael Hanselmann | |
268 | 26517d45 | Iustin Pop | self._orig_data = serializer.Dump(self._data) |
269 | 2fb96d39 | Michael Hanselmann | |
270 | fc428e32 | Michael Hanselmann | def Save(self): |
271 | fc428e32 | Michael Hanselmann | """Save state to file, then unlock and close it.
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272 | 5a3103e9 | Michael Hanselmann |
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273 | 5a3103e9 | Michael Hanselmann | """
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274 | fc428e32 | Michael Hanselmann | assert self.statefile |
275 | fc428e32 | Michael Hanselmann | |
276 | 26517d45 | Iustin Pop | serialized_form = serializer.Dump(self._data)
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277 | 26517d45 | Iustin Pop | if self._orig_data == serialized_form: |
278 | 2fb96d39 | Michael Hanselmann | logging.debug("Data didn't change, just touching status file")
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279 | 2fb96d39 | Michael Hanselmann | os.utime(constants.WATCHER_STATEFILE, None)
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280 | 2fb96d39 | Michael Hanselmann | return
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281 | 2fb96d39 | Michael Hanselmann | |
282 | fc428e32 | Michael Hanselmann | # We need to make sure the file is locked before renaming it, otherwise
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283 | fc428e32 | Michael Hanselmann | # starting ganeti-watcher again at the same time will create a conflict.
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284 | fc428e32 | Michael Hanselmann | fd = utils.WriteFile(constants.WATCHER_STATEFILE, |
285 | 26517d45 | Iustin Pop | data=serialized_form, |
286 | eb0f0ce0 | Michael Hanselmann | prewrite=utils.LockFile, close=False)
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287 | fc428e32 | Michael Hanselmann | self.statefile = os.fdopen(fd, 'w+') |
288 | 5a3103e9 | Michael Hanselmann | |
289 | fc428e32 | Michael Hanselmann | def Close(self): |
290 | 5a3103e9 | Michael Hanselmann | """Unlock configuration file and close it.
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291 | 5a3103e9 | Michael Hanselmann |
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292 | 5a3103e9 | Michael Hanselmann | """
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293 | 5a3103e9 | Michael Hanselmann | assert self.statefile |
294 | 5a3103e9 | Michael Hanselmann | |
295 | fc428e32 | Michael Hanselmann | # Files are automatically unlocked when closing them
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296 | 5a3103e9 | Michael Hanselmann | self.statefile.close()
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297 | 5a3103e9 | Michael Hanselmann | self.statefile = None |
298 | 5a3103e9 | Michael Hanselmann | |
299 | 5a3103e9 | Michael Hanselmann | def GetNodeBootID(self, name): |
300 | 5a3103e9 | Michael Hanselmann | """Returns the last boot ID of a node or None.
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301 | a8083063 | Iustin Pop |
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302 | 5a3103e9 | Michael Hanselmann | """
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303 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
304 | 5a3103e9 | Michael Hanselmann | |
305 | 7b195d9b | Michael Hanselmann | if name in ndata and KEY_BOOT_ID in ndata[name]: |
306 | 7b195d9b | Michael Hanselmann | return ndata[name][KEY_BOOT_ID]
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307 | 5a3103e9 | Michael Hanselmann | return None |
308 | 5a3103e9 | Michael Hanselmann | |
309 | 5a3103e9 | Michael Hanselmann | def SetNodeBootID(self, name, bootid): |
310 | 5a3103e9 | Michael Hanselmann | """Sets the boot ID of a node.
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311 | 5a3103e9 | Michael Hanselmann |
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312 | 5a3103e9 | Michael Hanselmann | """
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313 | 5a3103e9 | Michael Hanselmann | assert bootid
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314 | a8083063 | Iustin Pop | |
315 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
316 | a8083063 | Iustin Pop | |
317 | 5a3103e9 | Michael Hanselmann | if name not in ndata: |
318 | 5a3103e9 | Michael Hanselmann | ndata[name] = {} |
319 | 5a3103e9 | Michael Hanselmann | |
320 | 7b195d9b | Michael Hanselmann | ndata[name][KEY_BOOT_ID] = bootid |
321 | 5a3103e9 | Michael Hanselmann | |
322 | 5a3103e9 | Michael Hanselmann | def NumberOfRestartAttempts(self, instance): |
323 | a8083063 | Iustin Pop | """Returns number of previous restart attempts.
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324 | a8083063 | Iustin Pop |
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325 | c41eea6e | Iustin Pop | @type instance: L{Instance}
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326 | c41eea6e | Iustin Pop | @param instance: the instance to look up
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327 | 38242904 | Iustin Pop |
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328 | a8083063 | Iustin Pop | """
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329 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
330 | a8083063 | Iustin Pop | |
331 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
332 | 7b195d9b | Michael Hanselmann | return idata[instance.name][KEY_RESTART_COUNT]
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333 | a8083063 | Iustin Pop | |
334 | a8083063 | Iustin Pop | return 0 |
335 | a8083063 | Iustin Pop | |
336 | f5116c87 | Iustin Pop | def MaintainInstanceList(self, instances): |
337 | f5116c87 | Iustin Pop | """Perform maintenance on the recorded instances.
|
338 | f5116c87 | Iustin Pop |
|
339 | f5116c87 | Iustin Pop | @type instances: list of string
|
340 | f5116c87 | Iustin Pop | @param instances: the list of currently existing instances
|
341 | f5116c87 | Iustin Pop |
|
342 | f5116c87 | Iustin Pop | """
|
343 | f5116c87 | Iustin Pop | idict = self._data["instance"] |
344 | f5116c87 | Iustin Pop | # First, delete obsolete instances
|
345 | f5116c87 | Iustin Pop | obsolete_instances = set(idict).difference(instances)
|
346 | f5116c87 | Iustin Pop | for inst in obsolete_instances: |
347 | f5116c87 | Iustin Pop | logging.debug("Forgetting obsolete instance %s", inst)
|
348 | f5116c87 | Iustin Pop | del idict[inst]
|
349 | f5116c87 | Iustin Pop | |
350 | f5116c87 | Iustin Pop | # Second, delete expired records
|
351 | f5116c87 | Iustin Pop | earliest = time.time() - RETRY_EXPIRATION |
352 | f5116c87 | Iustin Pop | expired_instances = [i for i in idict |
353 | f5116c87 | Iustin Pop | if idict[i][KEY_RESTART_WHEN] < earliest]
|
354 | f5116c87 | Iustin Pop | for inst in expired_instances: |
355 | f5116c87 | Iustin Pop | logging.debug("Expiring record for instance %s", inst)
|
356 | f5116c87 | Iustin Pop | del idict[inst]
|
357 | f5116c87 | Iustin Pop | |
358 | 5a3103e9 | Michael Hanselmann | def RecordRestartAttempt(self, instance): |
359 | a8083063 | Iustin Pop | """Record a restart attempt.
|
360 | a8083063 | Iustin Pop |
|
361 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
362 | c41eea6e | Iustin Pop | @param instance: the instance being restarted
|
363 | 38242904 | Iustin Pop |
|
364 | a8083063 | Iustin Pop | """
|
365 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
366 | a8083063 | Iustin Pop | |
367 | 5a3103e9 | Michael Hanselmann | if instance.name not in idata: |
368 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] = {} |
369 | 5a3103e9 | Michael Hanselmann | else:
|
370 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] |
371 | a8083063 | Iustin Pop | |
372 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_WHEN] = time.time() |
373 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_COUNT] = inst.get(KEY_RESTART_COUNT, 0) + 1 |
374 | a8083063 | Iustin Pop | |
375 | 5a3103e9 | Michael Hanselmann | def RemoveInstance(self, instance): |
376 | c41eea6e | Iustin Pop | """Update state to reflect that a machine is running.
|
377 | a8083063 | Iustin Pop |
|
378 | c41eea6e | Iustin Pop | This method removes the record for a named instance (as we only
|
379 | c41eea6e | Iustin Pop | track down instances).
|
380 | a8083063 | Iustin Pop |
|
381 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
382 | c41eea6e | Iustin Pop | @param instance: the instance to remove from books
|
383 | 38242904 | Iustin Pop |
|
384 | a8083063 | Iustin Pop | """
|
385 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
386 | a8083063 | Iustin Pop | |
387 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
388 | 5a3103e9 | Michael Hanselmann | del idata[instance.name]
|
389 | a8083063 | Iustin Pop | |
390 | a8083063 | Iustin Pop | |
391 | a8083063 | Iustin Pop | class Instance(object): |
392 | a8083063 | Iustin Pop | """Abstraction for a Virtual Machine instance.
|
393 | a8083063 | Iustin Pop |
|
394 | a8083063 | Iustin Pop | """
|
395 | 83e5e26f | René Nussbaumer | def __init__(self, name, state, autostart, snodes): |
396 | a8083063 | Iustin Pop | self.name = name
|
397 | a8083063 | Iustin Pop | self.state = state
|
398 | 5a3103e9 | Michael Hanselmann | self.autostart = autostart
|
399 | 83e5e26f | René Nussbaumer | self.snodes = snodes
|
400 | a8083063 | Iustin Pop | |
401 | a8083063 | Iustin Pop | def Restart(self): |
402 | 3ecf6786 | Iustin Pop | """Encapsulates the start of an instance.
|
403 | 3ecf6786 | Iustin Pop |
|
404 | 3ecf6786 | Iustin Pop | """
|
405 | c873d91c | Iustin Pop | op = opcodes.OpInstanceStartup(instance_name=self.name, force=False) |
406 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
407 | a8083063 | Iustin Pop | |
408 | 5a3103e9 | Michael Hanselmann | def ActivateDisks(self): |
409 | 5a3103e9 | Michael Hanselmann | """Encapsulates the activation of all disks of an instance.
|
410 | 5a3103e9 | Michael Hanselmann |
|
411 | 5a3103e9 | Michael Hanselmann | """
|
412 | 83f5d475 | Iustin Pop | op = opcodes.OpInstanceActivateDisks(instance_name=self.name)
|
413 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
414 | a8083063 | Iustin Pop | |
415 | a8083063 | Iustin Pop | |
416 | 6dfcc47b | Iustin Pop | def GetClusterData(): |
417 | 5a3103e9 | Michael Hanselmann | """Get a list of instances on this cluster.
|
418 | 5a3103e9 | Michael Hanselmann |
|
419 | 5a3103e9 | Michael Hanselmann | """
|
420 | 6dfcc47b | Iustin Pop | op1_fields = ["name", "status", "admin_state", "snodes"] |
421 | f2af0bec | Iustin Pop | op1 = opcodes.OpInstanceQuery(output_fields=op1_fields, names=[], |
422 | f2af0bec | Iustin Pop | use_locking=True)
|
423 | 6dfcc47b | Iustin Pop | op2_fields = ["name", "bootid", "offline"] |
424 | 2237687b | Iustin Pop | op2 = opcodes.OpNodeQuery(output_fields=op2_fields, names=[], |
425 | 2237687b | Iustin Pop | use_locking=True)
|
426 | a8083063 | Iustin Pop | |
427 | 6dfcc47b | Iustin Pop | job_id = client.SubmitJob([op1, op2]) |
428 | a8083063 | Iustin Pop | |
429 | 6dfcc47b | Iustin Pop | all_results = cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
430 | 5a3103e9 | Michael Hanselmann | |
431 | 78f44650 | Iustin Pop | logging.debug("Got data from cluster, writing instance status file")
|
432 | 78f44650 | Iustin Pop | |
433 | 6dfcc47b | Iustin Pop | result = all_results[0]
|
434 | 6dfcc47b | Iustin Pop | smap = {} |
435 | 5a3103e9 | Michael Hanselmann | |
436 | 6dfcc47b | Iustin Pop | instances = {} |
437 | 78f44650 | Iustin Pop | |
438 | 78f44650 | Iustin Pop | # write the upfile
|
439 | 78f44650 | Iustin Pop | up_data = "".join(["%s %s\n" % (fields[0], fields[1]) for fields in result]) |
440 | 78f44650 | Iustin Pop | utils.WriteFile(file_name=constants.INSTANCE_UPFILE, data=up_data) |
441 | 78f44650 | Iustin Pop | |
442 | 6dfcc47b | Iustin Pop | for fields in result: |
443 | 6dfcc47b | Iustin Pop | (name, status, autostart, snodes) = fields |
444 | 5a3103e9 | Michael Hanselmann | |
445 | 6dfcc47b | Iustin Pop | # update the secondary node map
|
446 | 6dfcc47b | Iustin Pop | for node in snodes: |
447 | 6dfcc47b | Iustin Pop | if node not in smap: |
448 | 6dfcc47b | Iustin Pop | smap[node] = [] |
449 | 6dfcc47b | Iustin Pop | smap[node].append(name) |
450 | a8083063 | Iustin Pop | |
451 | 83e5e26f | René Nussbaumer | instances[name] = Instance(name, status, autostart, snodes) |
452 | 5a3103e9 | Michael Hanselmann | |
453 | 6dfcc47b | Iustin Pop | nodes = dict([(name, (bootid, offline))
|
454 | 6dfcc47b | Iustin Pop | for name, bootid, offline in all_results[1]]) |
455 | 5a3103e9 | Michael Hanselmann | |
456 | 6dfcc47b | Iustin Pop | client.ArchiveJob(job_id) |
457 | 5a3103e9 | Michael Hanselmann | |
458 | 6dfcc47b | Iustin Pop | return instances, nodes, smap
|
459 | a8083063 | Iustin Pop | |
460 | a8083063 | Iustin Pop | |
461 | 5a3103e9 | Michael Hanselmann | class Watcher(object): |
462 | 55c85950 | Iustin Pop | """Encapsulate the logic for restarting erroneously halted virtual machines.
|
463 | a8083063 | Iustin Pop |
|
464 | a8083063 | Iustin Pop | The calling program should periodically instantiate me and call Run().
|
465 | a8083063 | Iustin Pop | This will traverse the list of instances, and make up to MAXTRIES attempts
|
466 | a8083063 | Iustin Pop | to restart machines that are down.
|
467 | 38242904 | Iustin Pop |
|
468 | a8083063 | Iustin Pop | """
|
469 | cc962d58 | Iustin Pop | def __init__(self, opts, notepad): |
470 | cc962d58 | Iustin Pop | self.notepad = notepad
|
471 | 2859b87b | Michael Hanselmann | master = client.QueryConfigValues(["master_node"])[0] |
472 | b705c7a6 | Manuel Franceschini | if master != netutils.Hostname.GetSysName():
|
473 | 3ecf6786 | Iustin Pop | raise NotMasterError("This is not the master node") |
474 | 24edc6d4 | Iustin Pop | # first archive old jobs
|
475 | 24edc6d4 | Iustin Pop | self.ArchiveJobs(opts.job_age)
|
476 | 24edc6d4 | Iustin Pop | # and only then submit new ones
|
477 | 6dfcc47b | Iustin Pop | self.instances, self.bootids, self.smap = GetClusterData() |
478 | eee1fa2d | Iustin Pop | self.started_instances = set() |
479 | f07521e5 | Iustin Pop | self.opts = opts
|
480 | a8083063 | Iustin Pop | |
481 | a8083063 | Iustin Pop | def Run(self): |
482 | cc962d58 | Iustin Pop | """Watcher run sequence.
|
483 | cc962d58 | Iustin Pop |
|
484 | cc962d58 | Iustin Pop | """
|
485 | cc962d58 | Iustin Pop | notepad = self.notepad
|
486 | cc962d58 | Iustin Pop | self.CheckInstances(notepad)
|
487 | cc962d58 | Iustin Pop | self.CheckDisks(notepad)
|
488 | cc962d58 | Iustin Pop | self.VerifyDisks()
|
489 | 5a3103e9 | Michael Hanselmann | |
490 | 24edc6d4 | Iustin Pop | @staticmethod
|
491 | 24edc6d4 | Iustin Pop | def ArchiveJobs(age): |
492 | f07521e5 | Iustin Pop | """Archive old jobs.
|
493 | f07521e5 | Iustin Pop |
|
494 | f07521e5 | Iustin Pop | """
|
495 | f07521e5 | Iustin Pop | arch_count, left_count = client.AutoArchiveJobs(age) |
496 | 07b8a2b5 | Iustin Pop | logging.debug("Archived %s jobs, left %s", arch_count, left_count)
|
497 | f07521e5 | Iustin Pop | |
498 | 5a3103e9 | Michael Hanselmann | def CheckDisks(self, notepad): |
499 | 5a3103e9 | Michael Hanselmann | """Check all nodes for restarted ones.
|
500 | 38242904 | Iustin Pop |
|
501 | a8083063 | Iustin Pop | """
|
502 | 5a3103e9 | Michael Hanselmann | check_nodes = [] |
503 | cbfc4681 | Iustin Pop | for name, (new_id, offline) in self.bootids.iteritems(): |
504 | 5a3103e9 | Michael Hanselmann | old = notepad.GetNodeBootID(name) |
505 | 37b77b18 | Iustin Pop | if new_id is None: |
506 | 37b77b18 | Iustin Pop | # Bad node, not returning a boot id
|
507 | cbfc4681 | Iustin Pop | if not offline: |
508 | cbfc4681 | Iustin Pop | logging.debug("Node %s missing boot id, skipping secondary checks",
|
509 | cbfc4681 | Iustin Pop | name) |
510 | 37b77b18 | Iustin Pop | continue
|
511 | 26517d45 | Iustin Pop | if old != new_id:
|
512 | 5a3103e9 | Michael Hanselmann | # Node's boot ID has changed, proably through a reboot.
|
513 | 5a3103e9 | Michael Hanselmann | check_nodes.append(name) |
514 | 5a3103e9 | Michael Hanselmann | |
515 | 5a3103e9 | Michael Hanselmann | if check_nodes:
|
516 | 5a3103e9 | Michael Hanselmann | # Activate disks for all instances with any of the checked nodes as a
|
517 | 5a3103e9 | Michael Hanselmann | # secondary node.
|
518 | 6dfcc47b | Iustin Pop | for node in check_nodes: |
519 | 6dfcc47b | Iustin Pop | if node not in self.smap: |
520 | eee1fa2d | Iustin Pop | continue
|
521 | 6dfcc47b | Iustin Pop | for instance_name in self.smap[node]: |
522 | 6dfcc47b | Iustin Pop | instance = self.instances[instance_name]
|
523 | 6dfcc47b | Iustin Pop | if not instance.autostart: |
524 | 6dfcc47b | Iustin Pop | logging.info(("Skipping disk activation for non-autostart"
|
525 | 6dfcc47b | Iustin Pop | " instance %s"), instance.name)
|
526 | 6dfcc47b | Iustin Pop | continue
|
527 | 6dfcc47b | Iustin Pop | if instance.name in self.started_instances: |
528 | 6dfcc47b | Iustin Pop | # we already tried to start the instance, which should have
|
529 | 6dfcc47b | Iustin Pop | # activated its drives (if they can be at all)
|
530 | 604c175c | Iustin Pop | logging.debug("Skipping disk activation for instance %s, as"
|
531 | 604c175c | Iustin Pop | " it was already started", instance.name)
|
532 | 6dfcc47b | Iustin Pop | continue
|
533 | 6dfcc47b | Iustin Pop | try:
|
534 | 6dfcc47b | Iustin Pop | logging.info("Activating disks for instance %s", instance.name)
|
535 | 6dfcc47b | Iustin Pop | instance.ActivateDisks() |
536 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
537 | 6dfcc47b | Iustin Pop | logging.exception("Error while activating disks for instance %s",
|
538 | 6dfcc47b | Iustin Pop | instance.name) |
539 | 5a3103e9 | Michael Hanselmann | |
540 | 5a3103e9 | Michael Hanselmann | # Keep changed boot IDs
|
541 | 5a3103e9 | Michael Hanselmann | for name in check_nodes: |
542 | 3448aa22 | Iustin Pop | notepad.SetNodeBootID(name, self.bootids[name][0]) |
543 | a8083063 | Iustin Pop | |
544 | 5a3103e9 | Michael Hanselmann | def CheckInstances(self, notepad): |
545 | 5a3103e9 | Michael Hanselmann | """Make a pass over the list of instances, restarting downed ones.
|
546 | 5a3103e9 | Michael Hanselmann |
|
547 | 5a3103e9 | Michael Hanselmann | """
|
548 | f5116c87 | Iustin Pop | notepad.MaintainInstanceList(self.instances.keys())
|
549 | f5116c87 | Iustin Pop | |
550 | 6dfcc47b | Iustin Pop | for instance in self.instances.values(): |
551 | a8083063 | Iustin Pop | if instance.state in BAD_STATES: |
552 | 5a3103e9 | Michael Hanselmann | n = notepad.NumberOfRestartAttempts(instance) |
553 | a8083063 | Iustin Pop | |
554 | a8083063 | Iustin Pop | if n > MAXTRIES:
|
555 | f5116c87 | Iustin Pop | logging.warning("Not restarting instance %s, retries exhausted",
|
556 | f5116c87 | Iustin Pop | instance.name) |
557 | a8083063 | Iustin Pop | continue
|
558 | a8083063 | Iustin Pop | elif n < MAXTRIES:
|
559 | a8083063 | Iustin Pop | last = " (Attempt #%d)" % (n + 1) |
560 | a8083063 | Iustin Pop | else:
|
561 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
562 | 438b45d4 | Michael Hanselmann | logging.error("Could not restart %s after %d attempts, giving up",
|
563 | 438b45d4 | Michael Hanselmann | instance.name, MAXTRIES) |
564 | a8083063 | Iustin Pop | continue
|
565 | a8083063 | Iustin Pop | try:
|
566 | 604c175c | Iustin Pop | logging.info("Restarting %s%s", instance.name, last)
|
567 | a8083063 | Iustin Pop | instance.Restart() |
568 | eee1fa2d | Iustin Pop | self.started_instances.add(instance.name)
|
569 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
570 | 4bffa7f7 | Iustin Pop | logging.exception("Error while restarting instance %s",
|
571 | 4bffa7f7 | Iustin Pop | instance.name) |
572 | a8083063 | Iustin Pop | |
573 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
574 | a8083063 | Iustin Pop | elif instance.state in HELPLESS_STATES: |
575 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
576 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
577 | a8083063 | Iustin Pop | else:
|
578 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
579 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
580 | 438b45d4 | Michael Hanselmann | logging.info("Restart of %s succeeded", instance.name)
|
581 | a8083063 | Iustin Pop | |
582 | 83e5e26f | René Nussbaumer | def _CheckForOfflineNodes(self, instance): |
583 | 83e5e26f | René Nussbaumer | """Checks if given instances has any secondary in offline status.
|
584 | 83e5e26f | René Nussbaumer |
|
585 | 83e5e26f | René Nussbaumer | @param instance: The instance object
|
586 | 83e5e26f | René Nussbaumer | @return: True if any of the secondary is offline, False otherwise
|
587 | 83e5e26f | René Nussbaumer |
|
588 | 83e5e26f | René Nussbaumer | """
|
589 | 83e5e26f | René Nussbaumer | bootids = [] |
590 | 83e5e26f | René Nussbaumer | for node in instance.snodes: |
591 | 83e5e26f | René Nussbaumer | bootids.append(self.bootids[node])
|
592 | 83e5e26f | René Nussbaumer | |
593 | 83e5e26f | René Nussbaumer | return compat.any(offline for (_, offline) in bootids) |
594 | 83e5e26f | René Nussbaumer | |
595 | 83e5e26f | René Nussbaumer | def VerifyDisks(self): |
596 | d2f311db | Iustin Pop | """Run gnt-cluster verify-disks.
|
597 | d2f311db | Iustin Pop |
|
598 | d2f311db | Iustin Pop | """
|
599 | bd8210a7 | Iustin Pop | op = opcodes.OpClusterVerifyDisks() |
600 | 6dfcc47b | Iustin Pop | job_id = client.SubmitJob([op]) |
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 | 5188ab37 | Iustin Pop | if not isinstance(result, (tuple, list)): |
604 | 5188ab37 | Iustin Pop | logging.error("Can't get a valid result from verify-disks")
|
605 | 5188ab37 | Iustin Pop | return
|
606 | 83e5e26f | René Nussbaumer | offline_disk_instances = result[1]
|
607 | 5188ab37 | Iustin Pop | if not offline_disk_instances: |
608 | 5188ab37 | Iustin Pop | # nothing to do
|
609 | 604c175c | Iustin Pop | logging.debug("verify-disks reported no offline disks, nothing to do")
|
610 | 5188ab37 | Iustin Pop | return
|
611 | 604c175c | Iustin Pop | logging.debug("Will activate disks for instance(s) %s",
|
612 | 1f864b60 | Iustin Pop | utils.CommaJoin(offline_disk_instances)) |
613 | 5188ab37 | Iustin Pop | # we submit only one job, and wait for it. not optimal, but spams
|
614 | 5188ab37 | Iustin Pop | # less the job queue
|
615 | 83e5e26f | René Nussbaumer | job = [] |
616 | 83e5e26f | René Nussbaumer | for name in offline_disk_instances: |
617 | 83e5e26f | René Nussbaumer | instance = self.instances[name]
|
618 | 83e5e26f | René Nussbaumer | if (instance.state in HELPLESS_STATES or |
619 | 83e5e26f | René Nussbaumer | self._CheckForOfflineNodes(instance)):
|
620 | 83e5e26f | René Nussbaumer | logging.info("Skip instance %s because it is in helpless state or has"
|
621 | 83e5e26f | René Nussbaumer | " one offline secondary", name)
|
622 | 83e5e26f | René Nussbaumer | continue
|
623 | 83e5e26f | René Nussbaumer | job.append(opcodes.OpInstanceActivateDisks(instance_name=name)) |
624 | 5188ab37 | Iustin Pop | |
625 | 83e5e26f | René Nussbaumer | if job:
|
626 | 83e5e26f | René Nussbaumer | job_id = cli.SendJob(job, cl=client) |
627 | 83e5e26f | René Nussbaumer | |
628 | 83e5e26f | René Nussbaumer | try:
|
629 | 83e5e26f | René Nussbaumer | cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
630 | 83e5e26f | René Nussbaumer | except Exception: # pylint: disable-msg=W0703 |
631 | 83e5e26f | René Nussbaumer | logging.exception("Error while activating disks")
|
632 | a8083063 | Iustin Pop | |
633 | a8083063 | Iustin Pop | |
634 | 001b3825 | Michael Hanselmann | def OpenStateFile(path): |
635 | 001b3825 | Michael Hanselmann | """Opens the state file and acquires a lock on it.
|
636 | 001b3825 | Michael Hanselmann |
|
637 | 001b3825 | Michael Hanselmann | @type path: string
|
638 | 001b3825 | Michael Hanselmann | @param path: Path to state file
|
639 | 001b3825 | Michael Hanselmann |
|
640 | 001b3825 | Michael Hanselmann | """
|
641 | 001b3825 | Michael Hanselmann | # The two-step dance below is necessary to allow both opening existing
|
642 | 001b3825 | Michael Hanselmann | # file read/write and creating if not existing. Vanilla open will truncate
|
643 | 001b3825 | Michael Hanselmann | # an existing file -or- allow creating if not existing.
|
644 | 001b3825 | Michael Hanselmann | statefile_fd = os.open(path, os.O_RDWR | os.O_CREAT) |
645 | 001b3825 | Michael Hanselmann | |
646 | 001b3825 | Michael Hanselmann | # Try to acquire lock on state file. If this fails, another watcher instance
|
647 | 001b3825 | Michael Hanselmann | # might already be running or another program is temporarily blocking the
|
648 | 001b3825 | Michael Hanselmann | # watcher from running.
|
649 | 001b3825 | Michael Hanselmann | try:
|
650 | 001b3825 | Michael Hanselmann | utils.LockFile(statefile_fd) |
651 | 001b3825 | Michael Hanselmann | except errors.LockError, err:
|
652 | 001b3825 | Michael Hanselmann | logging.error("Can't acquire lock on state file %s: %s", path, err)
|
653 | 001b3825 | Michael Hanselmann | return None |
654 | 001b3825 | Michael Hanselmann | |
655 | 001b3825 | Michael Hanselmann | return os.fdopen(statefile_fd, "w+") |
656 | 001b3825 | Michael Hanselmann | |
657 | 001b3825 | Michael Hanselmann | |
658 | db147305 | Tom Limoncelli | def IsRapiResponding(hostname): |
659 | db147305 | Tom Limoncelli | """Connects to RAPI port and does a simple test.
|
660 | db147305 | Tom Limoncelli |
|
661 | db147305 | Tom Limoncelli | Connects to RAPI port of hostname and does a simple test. At this time, the
|
662 | db147305 | Tom Limoncelli | test is GetVersion.
|
663 | db147305 | Tom Limoncelli |
|
664 | db147305 | Tom Limoncelli | @type hostname: string
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665 | db147305 | Tom Limoncelli | @param hostname: hostname of the node to connect to.
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666 | db147305 | Tom Limoncelli | @rtype: bool
|
667 | db147305 | Tom Limoncelli | @return: Whether RAPI is working properly
|
668 | db147305 | Tom Limoncelli |
|
669 | db147305 | Tom Limoncelli | """
|
670 | 34f06005 | Iustin Pop | curl_config = rapi.client.GenericCurlConfig() |
671 | 2a7c3583 | Michael Hanselmann | rapi_client = rapi.client.GanetiRapiClient(hostname, |
672 | 2a7c3583 | Michael Hanselmann | curl_config_fn=curl_config) |
673 | db147305 | Tom Limoncelli | try:
|
674 | db147305 | Tom Limoncelli | master_version = rapi_client.GetVersion() |
675 | db147305 | Tom Limoncelli | except rapi.client.CertificateError, err:
|
676 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: CertificateError (%s)", err)
|
677 | db147305 | Tom Limoncelli | return False |
678 | db147305 | Tom Limoncelli | except rapi.client.GanetiApiError, err:
|
679 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: GanetiApiError (%s)", err)
|
680 | db147305 | Tom Limoncelli | return False |
681 | db147305 | Tom Limoncelli | logging.debug("RAPI Result: master_version is %s", master_version)
|
682 | db147305 | Tom Limoncelli | return master_version == constants.RAPI_VERSION
|
683 | db147305 | Tom Limoncelli | |
684 | db147305 | Tom Limoncelli | |
685 | a8083063 | Iustin Pop | def ParseOptions(): |
686 | a8083063 | Iustin Pop | """Parse the command line options.
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687 | a8083063 | Iustin Pop |
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688 | c41eea6e | Iustin Pop | @return: (options, args) as from OptionParser.parse_args()
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689 | a8083063 | Iustin Pop |
|
690 | a8083063 | Iustin Pop | """
|
691 | a8083063 | Iustin Pop | parser = OptionParser(description="Ganeti cluster watcher",
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692 | a8083063 | Iustin Pop | usage="%prog [-d]",
|
693 | a8083063 | Iustin Pop | version="%%prog (ganeti) %s" %
|
694 | a8083063 | Iustin Pop | constants.RELEASE_VERSION) |
695 | a8083063 | Iustin Pop | |
696 | 6d4e8ec0 | Iustin Pop | parser.add_option(cli.DEBUG_OPT) |
697 | f07521e5 | Iustin Pop | parser.add_option("-A", "--job-age", dest="job_age", |
698 | f07521e5 | Iustin Pop | help="Autoarchive jobs older than this age (default"
|
699 | f07521e5 | Iustin Pop | " 6 hours)", default=6*3600) |
700 | 46c8a6ab | Iustin Pop | parser.add_option("--ignore-pause", dest="ignore_pause", default=False, |
701 | 46c8a6ab | Iustin Pop | action="store_true", help="Ignore cluster pause setting") |
702 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
703 | f07521e5 | Iustin Pop | options.job_age = cli.ParseTimespec(options.job_age) |
704 | a8083063 | Iustin Pop | return options, args
|
705 | a8083063 | Iustin Pop | |
706 | a8083063 | Iustin Pop | |
707 | 2a7c3583 | Michael Hanselmann | @rapi.client.UsesRapiClient
|
708 | 9f4bb951 | Michael Hanselmann | def Main(): |
709 | a8083063 | Iustin Pop | """Main function.
|
710 | a8083063 | Iustin Pop |
|
711 | a8083063 | Iustin Pop | """
|
712 | 7260cfbe | Iustin Pop | global client # pylint: disable-msg=W0603 |
713 | e125c67c | Michael Hanselmann | |
714 | f93427cd | Iustin Pop | options, args = ParseOptions() |
715 | f93427cd | Iustin Pop | |
716 | f93427cd | Iustin Pop | if args: # watcher doesn't take any arguments |
717 | f93427cd | Iustin Pop | print >> sys.stderr, ("Usage: %s [-f] " % sys.argv[0]) |
718 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
719 | a8083063 | Iustin Pop | |
720 | cfcc79c6 | Michael Hanselmann | utils.SetupLogging(constants.LOG_WATCHER, sys.argv[0],
|
721 | cfcc79c6 | Michael Hanselmann | debug=options.debug, stderr_logging=options.debug) |
722 | a8083063 | Iustin Pop | |
723 | 46c8a6ab | Iustin Pop | if ShouldPause() and not options.ignore_pause: |
724 | 3753b2cb | Michael Hanselmann | logging.debug("Pause has been set, exiting")
|
725 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
726 | 3753b2cb | Michael Hanselmann | |
727 | 001b3825 | Michael Hanselmann | statefile = OpenStateFile(constants.WATCHER_STATEFILE) |
728 | 001b3825 | Michael Hanselmann | if not statefile: |
729 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
730 | 001b3825 | Michael Hanselmann | |
731 | 24edc6d4 | Iustin Pop | update_file = False
|
732 | a8083063 | Iustin Pop | try:
|
733 | f1115454 | Guido Trotter | StartNodeDaemons() |
734 | 9e289e36 | Guido Trotter | RunWatcherHooks() |
735 | 50273051 | Iustin Pop | # run node maintenance in all cases, even if master, so that old
|
736 | 50273051 | Iustin Pop | # masters can be properly cleaned up too
|
737 | 50273051 | Iustin Pop | if NodeMaintenance.ShouldRun():
|
738 | 50273051 | Iustin Pop | NodeMaintenance().Exec() |
739 | c4f0219c | Iustin Pop | |
740 | 001b3825 | Michael Hanselmann | notepad = WatcherState(statefile) |
741 | 781b2b2b | Michael Hanselmann | try:
|
742 | 2c404217 | Iustin Pop | try:
|
743 | 2c404217 | Iustin Pop | client = cli.GetClient() |
744 | 2c404217 | Iustin Pop | except errors.OpPrereqError:
|
745 | 2c404217 | Iustin Pop | # this is, from cli.GetClient, a not-master case
|
746 | 7dfb83c2 | Iustin Pop | logging.debug("Not on master, exiting")
|
747 | 24edc6d4 | Iustin Pop | update_file = True
|
748 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
749 | 7dfb83c2 | Iustin Pop | except luxi.NoMasterError, err:
|
750 | 7dfb83c2 | Iustin Pop | logging.warning("Master seems to be down (%s), trying to restart",
|
751 | 7dfb83c2 | Iustin Pop | str(err))
|
752 | 2826b361 | Guido Trotter | if not utils.EnsureDaemon(constants.MASTERD): |
753 | 7dfb83c2 | Iustin Pop | logging.critical("Can't start the master, exiting")
|
754 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
755 | 7dfb83c2 | Iustin Pop | # else retry the connection
|
756 | 7dfb83c2 | Iustin Pop | client = cli.GetClient() |
757 | cc962d58 | Iustin Pop | |
758 | 83052f9e | Guido Trotter | # we are on master now
|
759 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.RAPI) |
760 | c4f0219c | Iustin Pop | |
761 | db147305 | Tom Limoncelli | # If RAPI isn't responding to queries, try one restart.
|
762 | db147305 | Tom Limoncelli | logging.debug("Attempting to talk with RAPI.")
|
763 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
764 | db147305 | Tom Limoncelli | logging.warning("Couldn't get answer from Ganeti RAPI daemon."
|
765 | db147305 | Tom Limoncelli | " Restarting Ganeti RAPI.")
|
766 | db147305 | Tom Limoncelli | utils.StopDaemon(constants.RAPI) |
767 | db147305 | Tom Limoncelli | utils.EnsureDaemon(constants.RAPI) |
768 | db147305 | Tom Limoncelli | logging.debug("Second attempt to talk with RAPI")
|
769 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
770 | db147305 | Tom Limoncelli | logging.fatal("RAPI is not responding. Please investigate.")
|
771 | db147305 | Tom Limoncelli | logging.debug("Successfully talked to RAPI.")
|
772 | db147305 | Tom Limoncelli | |
773 | cc962d58 | Iustin Pop | try:
|
774 | cc962d58 | Iustin Pop | watcher = Watcher(options, notepad) |
775 | cc962d58 | Iustin Pop | except errors.ConfigurationError:
|
776 | cc962d58 | Iustin Pop | # Just exit if there's no configuration
|
777 | 24edc6d4 | Iustin Pop | update_file = True
|
778 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
779 | e125c67c | Michael Hanselmann | |
780 | cc962d58 | Iustin Pop | watcher.Run() |
781 | 24edc6d4 | Iustin Pop | update_file = True
|
782 | 24edc6d4 | Iustin Pop | |
783 | cc962d58 | Iustin Pop | finally:
|
784 | 7dfb83c2 | Iustin Pop | if update_file:
|
785 | 7dfb83c2 | Iustin Pop | notepad.Save() |
786 | 7dfb83c2 | Iustin Pop | else:
|
787 | 7dfb83c2 | Iustin Pop | logging.debug("Not updating status file due to failure")
|
788 | 1b052f42 | Michael Hanselmann | except SystemExit: |
789 | 1b052f42 | Michael Hanselmann | raise
|
790 | 38242904 | Iustin Pop | except NotMasterError:
|
791 | 438b45d4 | Michael Hanselmann | logging.debug("Not master, exiting")
|
792 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NOTMASTER
|
793 | 89e1fc26 | Iustin Pop | except errors.ResolverError, err:
|
794 | 438b45d4 | Michael Hanselmann | logging.error("Cannot resolve hostname '%s', exiting.", err.args[0]) |
795 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NODESETUP_ERROR
|
796 | 24edc6d4 | Iustin Pop | except errors.JobQueueFull:
|
797 | 24edc6d4 | Iustin Pop | logging.error("Job queue is full, can't query cluster state")
|
798 | 24edc6d4 | Iustin Pop | except errors.JobQueueDrainError:
|
799 | 24edc6d4 | Iustin Pop | logging.error("Job queue is drained, can't maintain cluster state")
|
800 | 438b45d4 | Michael Hanselmann | except Exception, err: |
801 | 001b3825 | Michael Hanselmann | logging.exception(str(err))
|
802 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
803 | 5a3103e9 | Michael Hanselmann | |
804 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS |