root / lib / watcher / __init__.py @ f2af0bec
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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 | a8083063 | Iustin Pop | import sys |
36 | a8083063 | Iustin Pop | import time |
37 | 438b45d4 | Michael Hanselmann | import logging |
38 | a8083063 | Iustin Pop | from optparse import OptionParser |
39 | a8083063 | Iustin Pop | |
40 | a8083063 | Iustin Pop | from ganeti import utils |
41 | a8083063 | Iustin Pop | from ganeti import constants |
42 | 67fe61c4 | Michael Hanselmann | from ganeti import serializer |
43 | 89e1fc26 | Iustin Pop | from ganeti import errors |
44 | e125c67c | Michael Hanselmann | from ganeti import opcodes |
45 | e125c67c | Michael Hanselmann | from ganeti import cli |
46 | 7dfb83c2 | Iustin Pop | from ganeti import luxi |
47 | 50273051 | Iustin Pop | from ganeti import ssconf |
48 | 50273051 | Iustin Pop | from ganeti import bdev |
49 | 50273051 | Iustin Pop | from ganeti import hypervisor |
50 | db147305 | Tom Limoncelli | from ganeti import rapi |
51 | 50273051 | Iustin Pop | from ganeti.confd import client as confd_client |
52 | a744b676 | Manuel Franceschini | from ganeti import netutils |
53 | a8083063 | Iustin Pop | |
54 | db147305 | Tom Limoncelli | import ganeti.rapi.client # pylint: disable-msg=W0611 |
55 | db147305 | Tom Limoncelli | |
56 | a8083063 | Iustin Pop | |
57 | 5a3103e9 | Michael Hanselmann | MAXTRIES = 5
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58 | f5116c87 | Iustin Pop | # Delete any record that is older than 8 hours; this value is based on
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59 | f5116c87 | Iustin Pop | # the fact that the current retry counter is 5, and watcher runs every
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60 | f5116c87 | Iustin Pop | # 5 minutes, so it takes around half an hour to exceed the retry
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61 | f5116c87 | Iustin Pop | # counter, so 8 hours (16*1/2h) seems like a reasonable reset time
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62 | f5116c87 | Iustin Pop | RETRY_EXPIRATION = 8 * 3600 |
63 | b7309a0d | Iustin Pop | BAD_STATES = ['ERROR_down']
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64 | cbfc4681 | Iustin Pop | HELPLESS_STATES = ['ERROR_nodedown', 'ERROR_nodeoffline'] |
65 | 5a3103e9 | Michael Hanselmann | NOTICE = 'NOTICE'
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66 | 5a3103e9 | Michael Hanselmann | ERROR = 'ERROR'
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67 | 7b195d9b | Michael Hanselmann | KEY_RESTART_COUNT = "restart_count"
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68 | 7b195d9b | Michael Hanselmann | KEY_RESTART_WHEN = "restart_when"
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69 | 7b195d9b | Michael Hanselmann | KEY_BOOT_ID = "bootid"
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70 | 5a3103e9 | Michael Hanselmann | |
71 | 5a3103e9 | Michael Hanselmann | |
72 | e125c67c | Michael Hanselmann | # Global client object
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73 | e125c67c | Michael Hanselmann | client = None
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74 | e125c67c | Michael Hanselmann | |
75 | e125c67c | Michael Hanselmann | |
76 | 7bca53e4 | Michael Hanselmann | class NotMasterError(errors.GenericError): |
77 | 38242904 | Iustin Pop | """Exception raised when this host is not the master."""
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78 | a8083063 | Iustin Pop | |
79 | a8083063 | Iustin Pop | |
80 | 3753b2cb | Michael Hanselmann | def ShouldPause(): |
81 | 3753b2cb | Michael Hanselmann | """Check whether we should pause.
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82 | 3753b2cb | Michael Hanselmann |
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83 | 3753b2cb | Michael Hanselmann | """
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84 | 3753b2cb | Michael Hanselmann | return bool(utils.ReadWatcherPauseFile(constants.WATCHER_PAUSEFILE)) |
85 | 3753b2cb | Michael Hanselmann | |
86 | 3753b2cb | Michael Hanselmann | |
87 | f1115454 | Guido Trotter | def StartNodeDaemons(): |
88 | f1115454 | Guido Trotter | """Start all the daemons that should be running on all nodes.
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89 | f1115454 | Guido Trotter |
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90 | f1115454 | Guido Trotter | """
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91 | 55c85950 | Iustin Pop | # on master or not, try to start the node daemon
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92 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.NODED) |
93 | f1115454 | Guido Trotter | # start confd as well. On non candidates it will be in disabled mode.
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94 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.CONFD) |
95 | f1115454 | Guido Trotter | |
96 | f1115454 | Guido Trotter | |
97 | 9e289e36 | Guido Trotter | def RunWatcherHooks(): |
98 | 9e289e36 | Guido Trotter | """Run the watcher hooks.
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99 | 9e289e36 | Guido Trotter |
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100 | 9e289e36 | Guido Trotter | """
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101 | c4feafe8 | Iustin Pop | hooks_dir = utils.PathJoin(constants.HOOKS_BASE_DIR, |
102 | c4feafe8 | Iustin Pop | constants.HOOKS_NAME_WATCHER) |
103 | 10e689d4 | Iustin Pop | if not os.path.isdir(hooks_dir): |
104 | 10e689d4 | Iustin Pop | return
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105 | 9e289e36 | Guido Trotter | |
106 | 9e289e36 | Guido Trotter | try:
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107 | 9e289e36 | Guido Trotter | results = utils.RunParts(hooks_dir) |
108 | 9e289e36 | Guido Trotter | except Exception, msg: # pylint: disable-msg=W0703 |
109 | 9e289e36 | Guido Trotter | logging.critical("RunParts %s failed: %s", hooks_dir, msg)
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110 | 9e289e36 | Guido Trotter | |
111 | 9e289e36 | Guido Trotter | for (relname, status, runresult) in results: |
112 | 9e289e36 | Guido Trotter | if status == constants.RUNPARTS_SKIP:
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113 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: skipped", relname)
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114 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_ERR:
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115 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: error (%s)", relname, runresult)
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116 | 9e289e36 | Guido Trotter | elif status == constants.RUNPARTS_RUN:
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117 | 9e289e36 | Guido Trotter | if runresult.failed:
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118 | 9e289e36 | Guido Trotter | logging.warning("Watcher hook %s: failed (exit: %d) (output: %s)",
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119 | 9e289e36 | Guido Trotter | relname, runresult.exit_code, runresult.output) |
120 | 9e289e36 | Guido Trotter | else:
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121 | 9e289e36 | Guido Trotter | logging.debug("Watcher hook %s: success (output: %s)", relname,
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122 | 9e289e36 | Guido Trotter | runresult.output) |
123 | 9e289e36 | Guido Trotter | |
124 | 001b3825 | Michael Hanselmann | |
125 | 50273051 | Iustin Pop | class NodeMaintenance(object): |
126 | 50273051 | Iustin Pop | """Talks to confd daemons and possible shutdown instances/drbd devices.
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127 | 50273051 | Iustin Pop |
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128 | 50273051 | Iustin Pop | """
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129 | 50273051 | Iustin Pop | def __init__(self): |
130 | 50273051 | Iustin Pop | self.store_cb = confd_client.StoreResultCallback()
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131 | 50273051 | Iustin Pop | self.filter_cb = confd_client.ConfdFilterCallback(self.store_cb) |
132 | 50273051 | Iustin Pop | self.confd_client = confd_client.GetConfdClient(self.filter_cb) |
133 | 50273051 | Iustin Pop | |
134 | 50273051 | Iustin Pop | @staticmethod
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135 | 50273051 | Iustin Pop | def ShouldRun(): |
136 | 50273051 | Iustin Pop | """Checks whether node maintenance should run.
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137 | 50273051 | Iustin Pop |
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138 | 50273051 | Iustin Pop | """
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139 | 50273051 | Iustin Pop | try:
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140 | 50273051 | Iustin Pop | return ssconf.SimpleStore().GetMaintainNodeHealth()
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141 | 50273051 | Iustin Pop | except errors.ConfigurationError, err:
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142 | 50273051 | Iustin Pop | logging.error("Configuration error, not activating node maintenance: %s",
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143 | 50273051 | Iustin Pop | err) |
144 | 50273051 | Iustin Pop | return False |
145 | 50273051 | Iustin Pop | |
146 | 50273051 | Iustin Pop | @staticmethod
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147 | 50273051 | Iustin Pop | def GetRunningInstances(): |
148 | 50273051 | Iustin Pop | """Compute list of hypervisor/running instances.
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149 | 50273051 | Iustin Pop |
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150 | 50273051 | Iustin Pop | """
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151 | 50273051 | Iustin Pop | hyp_list = ssconf.SimpleStore().GetHypervisorList() |
152 | 50273051 | Iustin Pop | results = [] |
153 | 50273051 | Iustin Pop | for hv_name in hyp_list: |
154 | 50273051 | Iustin Pop | try:
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155 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
156 | 50273051 | Iustin Pop | ilist = hv.ListInstances() |
157 | 50273051 | Iustin Pop | results.extend([(iname, hv_name) for iname in ilist]) |
158 | 50273051 | Iustin Pop | except: # pylint: disable-msg=W0702 |
159 | 50273051 | Iustin Pop | logging.error("Error while listing instances for hypervisor %s",
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160 | 50273051 | Iustin Pop | hv_name, exc_info=True)
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161 | 50273051 | Iustin Pop | return results
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162 | 50273051 | Iustin Pop | |
163 | 50273051 | Iustin Pop | @staticmethod
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164 | 50273051 | Iustin Pop | def GetUsedDRBDs(): |
165 | 50273051 | Iustin Pop | """Get list of used DRBD minors.
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166 | 50273051 | Iustin Pop |
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167 | 50273051 | Iustin Pop | """
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168 | 50273051 | Iustin Pop | return bdev.DRBD8.GetUsedDevs().keys()
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169 | 50273051 | Iustin Pop | |
170 | 50273051 | Iustin Pop | @classmethod
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171 | 50273051 | Iustin Pop | def DoMaintenance(cls, role): |
172 | 50273051 | Iustin Pop | """Maintain the instance list.
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173 | 50273051 | Iustin Pop |
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174 | 50273051 | Iustin Pop | """
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175 | 50273051 | Iustin Pop | if role == constants.CONFD_NODE_ROLE_OFFLINE:
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176 | 50273051 | Iustin Pop | inst_running = cls.GetRunningInstances() |
177 | 50273051 | Iustin Pop | cls.ShutdownInstances(inst_running) |
178 | 50273051 | Iustin Pop | drbd_running = cls.GetUsedDRBDs() |
179 | 50273051 | Iustin Pop | cls.ShutdownDRBD(drbd_running) |
180 | 50273051 | Iustin Pop | else:
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181 | 50273051 | Iustin Pop | logging.debug("Not doing anything for role %s", role)
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182 | 50273051 | Iustin Pop | |
183 | 50273051 | Iustin Pop | @staticmethod
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184 | 50273051 | Iustin Pop | def ShutdownInstances(inst_running): |
185 | 50273051 | Iustin Pop | """Shutdown running instances.
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186 | 50273051 | Iustin Pop |
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187 | 50273051 | Iustin Pop | """
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188 | 50273051 | Iustin Pop | names_running = set([i[0] for i in inst_running]) |
189 | 50273051 | Iustin Pop | if names_running:
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190 | 50273051 | Iustin Pop | logging.info("Following instances should not be running,"
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191 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(names_running))
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192 | 50273051 | Iustin Pop | # this dictionary will collapse duplicate instance names (only
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193 | 50273051 | Iustin Pop | # xen pvm/vhm) into a single key, which is fine
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194 | 50273051 | Iustin Pop | i2h = dict(inst_running)
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195 | 50273051 | Iustin Pop | for name in names_running: |
196 | 50273051 | Iustin Pop | hv_name = i2h[name] |
197 | 50273051 | Iustin Pop | hv = hypervisor.GetHypervisor(hv_name) |
198 | 50273051 | Iustin Pop | hv.StopInstance(None, force=True, name=name) |
199 | 50273051 | Iustin Pop | |
200 | 50273051 | Iustin Pop | @staticmethod
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201 | 50273051 | Iustin Pop | def ShutdownDRBD(drbd_running): |
202 | 50273051 | Iustin Pop | """Shutdown active DRBD devices.
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203 | 50273051 | Iustin Pop |
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204 | 50273051 | Iustin Pop | """
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205 | 50273051 | Iustin Pop | if drbd_running:
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206 | 50273051 | Iustin Pop | logging.info("Following DRBD minors should not be active,"
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207 | 50273051 | Iustin Pop | " shutting them down: %s", utils.CommaJoin(drbd_running))
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208 | 50273051 | Iustin Pop | for minor in drbd_running: |
209 | 50273051 | Iustin Pop | # pylint: disable-msg=W0212
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210 | 50273051 | Iustin Pop | # using the private method as is, pending enhancements to the DRBD
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211 | 50273051 | Iustin Pop | # interface
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212 | 50273051 | Iustin Pop | bdev.DRBD8._ShutdownAll(minor) |
213 | 50273051 | Iustin Pop | |
214 | 50273051 | Iustin Pop | def Exec(self): |
215 | 50273051 | Iustin Pop | """Check node status versus cluster desired state.
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216 | 50273051 | Iustin Pop |
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217 | 50273051 | Iustin Pop | """
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218 | b705c7a6 | Manuel Franceschini | my_name = netutils.Hostname.GetSysName() |
219 | 50273051 | Iustin Pop | req = confd_client.ConfdClientRequest(type= |
220 | 50273051 | Iustin Pop | constants.CONFD_REQ_NODE_ROLE_BYNAME, |
221 | 50273051 | Iustin Pop | query=my_name) |
222 | ebacb943 | Iustin Pop | self.confd_client.SendRequest(req, async=False, coverage=-1) |
223 | 50273051 | Iustin Pop | timed_out, _, _ = self.confd_client.WaitForReply(req.rsalt)
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224 | 50273051 | Iustin Pop | if not timed_out: |
225 | 50273051 | Iustin Pop | # should have a valid response
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226 | 50273051 | Iustin Pop | status, result = self.store_cb.GetResponse(req.rsalt)
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227 | 50273051 | Iustin Pop | assert status, "Missing result but received replies" |
228 | 50273051 | Iustin Pop | if not self.filter_cb.consistent[req.rsalt]: |
229 | 50273051 | Iustin Pop | logging.warning("Inconsistent replies, not doing anything")
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230 | 50273051 | Iustin Pop | return
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231 | 50273051 | Iustin Pop | self.DoMaintenance(result.server_reply.answer)
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232 | 50273051 | Iustin Pop | else:
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233 | 50273051 | Iustin Pop | logging.warning("Confd query timed out, cannot do maintenance actions")
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234 | 50273051 | Iustin Pop | |
235 | 50273051 | Iustin Pop | |
236 | 5a3103e9 | Michael Hanselmann | class WatcherState(object): |
237 | a8083063 | Iustin Pop | """Interface to a state file recording restart attempts.
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238 | a8083063 | Iustin Pop |
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239 | a8083063 | Iustin Pop | """
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240 | 001b3825 | Michael Hanselmann | def __init__(self, statefile): |
241 | 5a3103e9 | Michael Hanselmann | """Open, lock, read and parse the file.
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242 | 5a3103e9 | Michael Hanselmann |
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243 | 001b3825 | Michael Hanselmann | @type statefile: file
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244 | 001b3825 | Michael Hanselmann | @param statefile: State file object
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245 | 5a3103e9 | Michael Hanselmann |
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246 | 5a3103e9 | Michael Hanselmann | """
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247 | 001b3825 | Michael Hanselmann | self.statefile = statefile
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248 | a8083063 | Iustin Pop | |
249 | 5a3103e9 | Michael Hanselmann | try:
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250 | 2c404217 | Iustin Pop | state_data = self.statefile.read()
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251 | 2c404217 | Iustin Pop | if not state_data: |
252 | 2c404217 | Iustin Pop | self._data = {}
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253 | 2c404217 | Iustin Pop | else:
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254 | 2c404217 | Iustin Pop | self._data = serializer.Load(state_data)
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255 | 7260cfbe | Iustin Pop | except Exception, msg: # pylint: disable-msg=W0703 |
256 | 5a3103e9 | Michael Hanselmann | # Ignore errors while loading the file and treat it as empty
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257 | b76f660d | Michael Hanselmann | self._data = {}
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258 | 2c404217 | Iustin Pop | logging.warning(("Invalid state file. Using defaults."
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259 | 438b45d4 | Michael Hanselmann | " Error message: %s"), msg)
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260 | 5a3103e9 | Michael Hanselmann | |
261 | b76f660d | Michael Hanselmann | if "instance" not in self._data: |
262 | b76f660d | Michael Hanselmann | self._data["instance"] = {} |
263 | b76f660d | Michael Hanselmann | if "node" not in self._data: |
264 | b76f660d | Michael Hanselmann | self._data["node"] = {} |
265 | 5a3103e9 | Michael Hanselmann | |
266 | 26517d45 | Iustin Pop | self._orig_data = serializer.Dump(self._data) |
267 | 2fb96d39 | Michael Hanselmann | |
268 | fc428e32 | Michael Hanselmann | def Save(self): |
269 | fc428e32 | Michael Hanselmann | """Save state to file, then unlock and close it.
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270 | 5a3103e9 | Michael Hanselmann |
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271 | 5a3103e9 | Michael Hanselmann | """
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272 | fc428e32 | Michael Hanselmann | assert self.statefile |
273 | fc428e32 | Michael Hanselmann | |
274 | 26517d45 | Iustin Pop | serialized_form = serializer.Dump(self._data)
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275 | 26517d45 | Iustin Pop | if self._orig_data == serialized_form: |
276 | 2fb96d39 | Michael Hanselmann | logging.debug("Data didn't change, just touching status file")
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277 | 2fb96d39 | Michael Hanselmann | os.utime(constants.WATCHER_STATEFILE, None)
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278 | 2fb96d39 | Michael Hanselmann | return
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279 | 2fb96d39 | Michael Hanselmann | |
280 | fc428e32 | Michael Hanselmann | # We need to make sure the file is locked before renaming it, otherwise
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281 | fc428e32 | Michael Hanselmann | # starting ganeti-watcher again at the same time will create a conflict.
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282 | fc428e32 | Michael Hanselmann | fd = utils.WriteFile(constants.WATCHER_STATEFILE, |
283 | 26517d45 | Iustin Pop | data=serialized_form, |
284 | eb0f0ce0 | Michael Hanselmann | prewrite=utils.LockFile, close=False)
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285 | fc428e32 | Michael Hanselmann | self.statefile = os.fdopen(fd, 'w+') |
286 | 5a3103e9 | Michael Hanselmann | |
287 | fc428e32 | Michael Hanselmann | def Close(self): |
288 | 5a3103e9 | Michael Hanselmann | """Unlock configuration file and close it.
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289 | 5a3103e9 | Michael Hanselmann |
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290 | 5a3103e9 | Michael Hanselmann | """
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291 | 5a3103e9 | Michael Hanselmann | assert self.statefile |
292 | 5a3103e9 | Michael Hanselmann | |
293 | fc428e32 | Michael Hanselmann | # Files are automatically unlocked when closing them
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294 | 5a3103e9 | Michael Hanselmann | self.statefile.close()
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295 | 5a3103e9 | Michael Hanselmann | self.statefile = None |
296 | 5a3103e9 | Michael Hanselmann | |
297 | 5a3103e9 | Michael Hanselmann | def GetNodeBootID(self, name): |
298 | 5a3103e9 | Michael Hanselmann | """Returns the last boot ID of a node or None.
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299 | a8083063 | Iustin Pop |
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300 | 5a3103e9 | Michael Hanselmann | """
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301 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
302 | 5a3103e9 | Michael Hanselmann | |
303 | 7b195d9b | Michael Hanselmann | if name in ndata and KEY_BOOT_ID in ndata[name]: |
304 | 7b195d9b | Michael Hanselmann | return ndata[name][KEY_BOOT_ID]
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305 | 5a3103e9 | Michael Hanselmann | return None |
306 | 5a3103e9 | Michael Hanselmann | |
307 | 5a3103e9 | Michael Hanselmann | def SetNodeBootID(self, name, bootid): |
308 | 5a3103e9 | Michael Hanselmann | """Sets the boot ID of a node.
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309 | 5a3103e9 | Michael Hanselmann |
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310 | 5a3103e9 | Michael Hanselmann | """
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311 | 5a3103e9 | Michael Hanselmann | assert bootid
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312 | a8083063 | Iustin Pop | |
313 | b76f660d | Michael Hanselmann | ndata = self._data["node"] |
314 | a8083063 | Iustin Pop | |
315 | 5a3103e9 | Michael Hanselmann | if name not in ndata: |
316 | 5a3103e9 | Michael Hanselmann | ndata[name] = {} |
317 | 5a3103e9 | Michael Hanselmann | |
318 | 7b195d9b | Michael Hanselmann | ndata[name][KEY_BOOT_ID] = bootid |
319 | 5a3103e9 | Michael Hanselmann | |
320 | 5a3103e9 | Michael Hanselmann | def NumberOfRestartAttempts(self, instance): |
321 | a8083063 | Iustin Pop | """Returns number of previous restart attempts.
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322 | a8083063 | Iustin Pop |
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323 | c41eea6e | Iustin Pop | @type instance: L{Instance}
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324 | c41eea6e | Iustin Pop | @param instance: the instance to look up
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325 | 38242904 | Iustin Pop |
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326 | a8083063 | Iustin Pop | """
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327 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
328 | a8083063 | Iustin Pop | |
329 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
330 | 7b195d9b | Michael Hanselmann | return idata[instance.name][KEY_RESTART_COUNT]
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331 | a8083063 | Iustin Pop | |
332 | a8083063 | Iustin Pop | return 0 |
333 | a8083063 | Iustin Pop | |
334 | f5116c87 | Iustin Pop | def MaintainInstanceList(self, instances): |
335 | f5116c87 | Iustin Pop | """Perform maintenance on the recorded instances.
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336 | f5116c87 | Iustin Pop |
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337 | f5116c87 | Iustin Pop | @type instances: list of string
|
338 | f5116c87 | Iustin Pop | @param instances: the list of currently existing instances
|
339 | f5116c87 | Iustin Pop |
|
340 | f5116c87 | Iustin Pop | """
|
341 | f5116c87 | Iustin Pop | idict = self._data["instance"] |
342 | f5116c87 | Iustin Pop | # First, delete obsolete instances
|
343 | f5116c87 | Iustin Pop | obsolete_instances = set(idict).difference(instances)
|
344 | f5116c87 | Iustin Pop | for inst in obsolete_instances: |
345 | f5116c87 | Iustin Pop | logging.debug("Forgetting obsolete instance %s", inst)
|
346 | f5116c87 | Iustin Pop | del idict[inst]
|
347 | f5116c87 | Iustin Pop | |
348 | f5116c87 | Iustin Pop | # Second, delete expired records
|
349 | f5116c87 | Iustin Pop | earliest = time.time() - RETRY_EXPIRATION |
350 | f5116c87 | Iustin Pop | expired_instances = [i for i in idict |
351 | f5116c87 | Iustin Pop | if idict[i][KEY_RESTART_WHEN] < earliest]
|
352 | f5116c87 | Iustin Pop | for inst in expired_instances: |
353 | f5116c87 | Iustin Pop | logging.debug("Expiring record for instance %s", inst)
|
354 | f5116c87 | Iustin Pop | del idict[inst]
|
355 | f5116c87 | Iustin Pop | |
356 | 5a3103e9 | Michael Hanselmann | def RecordRestartAttempt(self, instance): |
357 | a8083063 | Iustin Pop | """Record a restart attempt.
|
358 | a8083063 | Iustin Pop |
|
359 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
360 | c41eea6e | Iustin Pop | @param instance: the instance being restarted
|
361 | 38242904 | Iustin Pop |
|
362 | a8083063 | Iustin Pop | """
|
363 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
364 | a8083063 | Iustin Pop | |
365 | 5a3103e9 | Michael Hanselmann | if instance.name not in idata: |
366 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] = {} |
367 | 5a3103e9 | Michael Hanselmann | else:
|
368 | 5a3103e9 | Michael Hanselmann | inst = idata[instance.name] |
369 | a8083063 | Iustin Pop | |
370 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_WHEN] = time.time() |
371 | 7b195d9b | Michael Hanselmann | inst[KEY_RESTART_COUNT] = inst.get(KEY_RESTART_COUNT, 0) + 1 |
372 | a8083063 | Iustin Pop | |
373 | 5a3103e9 | Michael Hanselmann | def RemoveInstance(self, instance): |
374 | c41eea6e | Iustin Pop | """Update state to reflect that a machine is running.
|
375 | a8083063 | Iustin Pop |
|
376 | c41eea6e | Iustin Pop | This method removes the record for a named instance (as we only
|
377 | c41eea6e | Iustin Pop | track down instances).
|
378 | a8083063 | Iustin Pop |
|
379 | c41eea6e | Iustin Pop | @type instance: L{Instance}
|
380 | c41eea6e | Iustin Pop | @param instance: the instance to remove from books
|
381 | 38242904 | Iustin Pop |
|
382 | a8083063 | Iustin Pop | """
|
383 | b76f660d | Michael Hanselmann | idata = self._data["instance"] |
384 | a8083063 | Iustin Pop | |
385 | 5a3103e9 | Michael Hanselmann | if instance.name in idata: |
386 | 5a3103e9 | Michael Hanselmann | del idata[instance.name]
|
387 | a8083063 | Iustin Pop | |
388 | a8083063 | Iustin Pop | |
389 | a8083063 | Iustin Pop | class Instance(object): |
390 | a8083063 | Iustin Pop | """Abstraction for a Virtual Machine instance.
|
391 | a8083063 | Iustin Pop |
|
392 | a8083063 | Iustin Pop | """
|
393 | 5a3103e9 | Michael Hanselmann | def __init__(self, name, state, autostart): |
394 | a8083063 | Iustin Pop | self.name = name
|
395 | a8083063 | Iustin Pop | self.state = state
|
396 | 5a3103e9 | Michael Hanselmann | self.autostart = autostart
|
397 | a8083063 | Iustin Pop | |
398 | a8083063 | Iustin Pop | def Restart(self): |
399 | 3ecf6786 | Iustin Pop | """Encapsulates the start of an instance.
|
400 | 3ecf6786 | Iustin Pop |
|
401 | 3ecf6786 | Iustin Pop | """
|
402 | 07813a9e | Iustin Pop | op = opcodes.OpStartupInstance(instance_name=self.name, force=False) |
403 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
404 | a8083063 | Iustin Pop | |
405 | 5a3103e9 | Michael Hanselmann | def ActivateDisks(self): |
406 | 5a3103e9 | Michael Hanselmann | """Encapsulates the activation of all disks of an instance.
|
407 | 5a3103e9 | Michael Hanselmann |
|
408 | 5a3103e9 | Michael Hanselmann | """
|
409 | 83f5d475 | Iustin Pop | op = opcodes.OpInstanceActivateDisks(instance_name=self.name)
|
410 | e125c67c | Michael Hanselmann | cli.SubmitOpCode(op, cl=client) |
411 | a8083063 | Iustin Pop | |
412 | a8083063 | Iustin Pop | |
413 | 6dfcc47b | Iustin Pop | def GetClusterData(): |
414 | 5a3103e9 | Michael Hanselmann | """Get a list of instances on this cluster.
|
415 | 5a3103e9 | Michael Hanselmann |
|
416 | 5a3103e9 | Michael Hanselmann | """
|
417 | 6dfcc47b | Iustin Pop | op1_fields = ["name", "status", "admin_state", "snodes"] |
418 | f2af0bec | Iustin Pop | op1 = opcodes.OpInstanceQuery(output_fields=op1_fields, names=[], |
419 | f2af0bec | Iustin Pop | use_locking=True)
|
420 | 6dfcc47b | Iustin Pop | op2_fields = ["name", "bootid", "offline"] |
421 | 6dfcc47b | Iustin Pop | op2 = opcodes.OpQueryNodes(output_fields=op2_fields, names=[], |
422 | 6dfcc47b | Iustin Pop | use_locking=True)
|
423 | a8083063 | Iustin Pop | |
424 | 6dfcc47b | Iustin Pop | job_id = client.SubmitJob([op1, op2]) |
425 | a8083063 | Iustin Pop | |
426 | 6dfcc47b | Iustin Pop | all_results = cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
427 | 5a3103e9 | Michael Hanselmann | |
428 | 78f44650 | Iustin Pop | logging.debug("Got data from cluster, writing instance status file")
|
429 | 78f44650 | Iustin Pop | |
430 | 6dfcc47b | Iustin Pop | result = all_results[0]
|
431 | 6dfcc47b | Iustin Pop | smap = {} |
432 | 5a3103e9 | Michael Hanselmann | |
433 | 6dfcc47b | Iustin Pop | instances = {} |
434 | 78f44650 | Iustin Pop | |
435 | 78f44650 | Iustin Pop | # write the upfile
|
436 | 78f44650 | Iustin Pop | up_data = "".join(["%s %s\n" % (fields[0], fields[1]) for fields in result]) |
437 | 78f44650 | Iustin Pop | utils.WriteFile(file_name=constants.INSTANCE_UPFILE, data=up_data) |
438 | 78f44650 | Iustin Pop | |
439 | 6dfcc47b | Iustin Pop | for fields in result: |
440 | 6dfcc47b | Iustin Pop | (name, status, autostart, snodes) = fields |
441 | 5a3103e9 | Michael Hanselmann | |
442 | 6dfcc47b | Iustin Pop | # update the secondary node map
|
443 | 6dfcc47b | Iustin Pop | for node in snodes: |
444 | 6dfcc47b | Iustin Pop | if node not in smap: |
445 | 6dfcc47b | Iustin Pop | smap[node] = [] |
446 | 6dfcc47b | Iustin Pop | smap[node].append(name) |
447 | a8083063 | Iustin Pop | |
448 | 6dfcc47b | Iustin Pop | instances[name] = Instance(name, status, autostart) |
449 | 5a3103e9 | Michael Hanselmann | |
450 | 6dfcc47b | Iustin Pop | nodes = dict([(name, (bootid, offline))
|
451 | 6dfcc47b | Iustin Pop | for name, bootid, offline in all_results[1]]) |
452 | 5a3103e9 | Michael Hanselmann | |
453 | 6dfcc47b | Iustin Pop | client.ArchiveJob(job_id) |
454 | 5a3103e9 | Michael Hanselmann | |
455 | 6dfcc47b | Iustin Pop | return instances, nodes, smap
|
456 | a8083063 | Iustin Pop | |
457 | a8083063 | Iustin Pop | |
458 | 5a3103e9 | Michael Hanselmann | class Watcher(object): |
459 | 55c85950 | Iustin Pop | """Encapsulate the logic for restarting erroneously halted virtual machines.
|
460 | a8083063 | Iustin Pop |
|
461 | a8083063 | Iustin Pop | The calling program should periodically instantiate me and call Run().
|
462 | a8083063 | Iustin Pop | This will traverse the list of instances, and make up to MAXTRIES attempts
|
463 | a8083063 | Iustin Pop | to restart machines that are down.
|
464 | 38242904 | Iustin Pop |
|
465 | a8083063 | Iustin Pop | """
|
466 | cc962d58 | Iustin Pop | def __init__(self, opts, notepad): |
467 | cc962d58 | Iustin Pop | self.notepad = notepad
|
468 | 2859b87b | Michael Hanselmann | master = client.QueryConfigValues(["master_node"])[0] |
469 | b705c7a6 | Manuel Franceschini | if master != netutils.Hostname.GetSysName():
|
470 | 3ecf6786 | Iustin Pop | raise NotMasterError("This is not the master node") |
471 | 24edc6d4 | Iustin Pop | # first archive old jobs
|
472 | 24edc6d4 | Iustin Pop | self.ArchiveJobs(opts.job_age)
|
473 | 24edc6d4 | Iustin Pop | # and only then submit new ones
|
474 | 6dfcc47b | Iustin Pop | self.instances, self.bootids, self.smap = GetClusterData() |
475 | eee1fa2d | Iustin Pop | self.started_instances = set() |
476 | f07521e5 | Iustin Pop | self.opts = opts
|
477 | a8083063 | Iustin Pop | |
478 | a8083063 | Iustin Pop | def Run(self): |
479 | cc962d58 | Iustin Pop | """Watcher run sequence.
|
480 | cc962d58 | Iustin Pop |
|
481 | cc962d58 | Iustin Pop | """
|
482 | cc962d58 | Iustin Pop | notepad = self.notepad
|
483 | cc962d58 | Iustin Pop | self.CheckInstances(notepad)
|
484 | cc962d58 | Iustin Pop | self.CheckDisks(notepad)
|
485 | cc962d58 | Iustin Pop | self.VerifyDisks()
|
486 | 5a3103e9 | Michael Hanselmann | |
487 | 24edc6d4 | Iustin Pop | @staticmethod
|
488 | 24edc6d4 | Iustin Pop | def ArchiveJobs(age): |
489 | f07521e5 | Iustin Pop | """Archive old jobs.
|
490 | f07521e5 | Iustin Pop |
|
491 | f07521e5 | Iustin Pop | """
|
492 | f07521e5 | Iustin Pop | arch_count, left_count = client.AutoArchiveJobs(age) |
493 | 07b8a2b5 | Iustin Pop | logging.debug("Archived %s jobs, left %s", arch_count, left_count)
|
494 | f07521e5 | Iustin Pop | |
495 | 5a3103e9 | Michael Hanselmann | def CheckDisks(self, notepad): |
496 | 5a3103e9 | Michael Hanselmann | """Check all nodes for restarted ones.
|
497 | 38242904 | Iustin Pop |
|
498 | a8083063 | Iustin Pop | """
|
499 | 5a3103e9 | Michael Hanselmann | check_nodes = [] |
500 | cbfc4681 | Iustin Pop | for name, (new_id, offline) in self.bootids.iteritems(): |
501 | 5a3103e9 | Michael Hanselmann | old = notepad.GetNodeBootID(name) |
502 | 37b77b18 | Iustin Pop | if new_id is None: |
503 | 37b77b18 | Iustin Pop | # Bad node, not returning a boot id
|
504 | cbfc4681 | Iustin Pop | if not offline: |
505 | cbfc4681 | Iustin Pop | logging.debug("Node %s missing boot id, skipping secondary checks",
|
506 | cbfc4681 | Iustin Pop | name) |
507 | 37b77b18 | Iustin Pop | continue
|
508 | 26517d45 | Iustin Pop | if old != new_id:
|
509 | 5a3103e9 | Michael Hanselmann | # Node's boot ID has changed, proably through a reboot.
|
510 | 5a3103e9 | Michael Hanselmann | check_nodes.append(name) |
511 | 5a3103e9 | Michael Hanselmann | |
512 | 5a3103e9 | Michael Hanselmann | if check_nodes:
|
513 | 5a3103e9 | Michael Hanselmann | # Activate disks for all instances with any of the checked nodes as a
|
514 | 5a3103e9 | Michael Hanselmann | # secondary node.
|
515 | 6dfcc47b | Iustin Pop | for node in check_nodes: |
516 | 6dfcc47b | Iustin Pop | if node not in self.smap: |
517 | eee1fa2d | Iustin Pop | continue
|
518 | 6dfcc47b | Iustin Pop | for instance_name in self.smap[node]: |
519 | 6dfcc47b | Iustin Pop | instance = self.instances[instance_name]
|
520 | 6dfcc47b | Iustin Pop | if not instance.autostart: |
521 | 6dfcc47b | Iustin Pop | logging.info(("Skipping disk activation for non-autostart"
|
522 | 6dfcc47b | Iustin Pop | " instance %s"), instance.name)
|
523 | 6dfcc47b | Iustin Pop | continue
|
524 | 6dfcc47b | Iustin Pop | if instance.name in self.started_instances: |
525 | 6dfcc47b | Iustin Pop | # we already tried to start the instance, which should have
|
526 | 6dfcc47b | Iustin Pop | # activated its drives (if they can be at all)
|
527 | 6dfcc47b | Iustin Pop | continue
|
528 | 6dfcc47b | Iustin Pop | try:
|
529 | 6dfcc47b | Iustin Pop | logging.info("Activating disks for instance %s", instance.name)
|
530 | 6dfcc47b | Iustin Pop | instance.ActivateDisks() |
531 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
532 | 6dfcc47b | Iustin Pop | logging.exception("Error while activating disks for instance %s",
|
533 | 6dfcc47b | Iustin Pop | instance.name) |
534 | 5a3103e9 | Michael Hanselmann | |
535 | 5a3103e9 | Michael Hanselmann | # Keep changed boot IDs
|
536 | 5a3103e9 | Michael Hanselmann | for name in check_nodes: |
537 | 3448aa22 | Iustin Pop | notepad.SetNodeBootID(name, self.bootids[name][0]) |
538 | a8083063 | Iustin Pop | |
539 | 5a3103e9 | Michael Hanselmann | def CheckInstances(self, notepad): |
540 | 5a3103e9 | Michael Hanselmann | """Make a pass over the list of instances, restarting downed ones.
|
541 | 5a3103e9 | Michael Hanselmann |
|
542 | 5a3103e9 | Michael Hanselmann | """
|
543 | f5116c87 | Iustin Pop | notepad.MaintainInstanceList(self.instances.keys())
|
544 | f5116c87 | Iustin Pop | |
545 | 6dfcc47b | Iustin Pop | for instance in self.instances.values(): |
546 | a8083063 | Iustin Pop | if instance.state in BAD_STATES: |
547 | 5a3103e9 | Michael Hanselmann | n = notepad.NumberOfRestartAttempts(instance) |
548 | a8083063 | Iustin Pop | |
549 | a8083063 | Iustin Pop | if n > MAXTRIES:
|
550 | f5116c87 | Iustin Pop | logging.warning("Not restarting instance %s, retries exhausted",
|
551 | f5116c87 | Iustin Pop | instance.name) |
552 | a8083063 | Iustin Pop | continue
|
553 | a8083063 | Iustin Pop | elif n < MAXTRIES:
|
554 | a8083063 | Iustin Pop | last = " (Attempt #%d)" % (n + 1) |
555 | a8083063 | Iustin Pop | else:
|
556 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
557 | 438b45d4 | Michael Hanselmann | logging.error("Could not restart %s after %d attempts, giving up",
|
558 | 438b45d4 | Michael Hanselmann | instance.name, MAXTRIES) |
559 | a8083063 | Iustin Pop | continue
|
560 | a8083063 | Iustin Pop | try:
|
561 | 438b45d4 | Michael Hanselmann | logging.info("Restarting %s%s",
|
562 | 438b45d4 | Michael Hanselmann | instance.name, last) |
563 | a8083063 | Iustin Pop | instance.Restart() |
564 | eee1fa2d | Iustin Pop | self.started_instances.add(instance.name)
|
565 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
566 | 4bffa7f7 | Iustin Pop | logging.exception("Error while restarting instance %s",
|
567 | 4bffa7f7 | Iustin Pop | instance.name) |
568 | a8083063 | Iustin Pop | |
569 | 5a3103e9 | Michael Hanselmann | notepad.RecordRestartAttempt(instance) |
570 | a8083063 | Iustin Pop | elif instance.state in HELPLESS_STATES: |
571 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
572 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
573 | a8083063 | Iustin Pop | else:
|
574 | 5a3103e9 | Michael Hanselmann | if notepad.NumberOfRestartAttempts(instance):
|
575 | 5a3103e9 | Michael Hanselmann | notepad.RemoveInstance(instance) |
576 | 438b45d4 | Michael Hanselmann | logging.info("Restart of %s succeeded", instance.name)
|
577 | a8083063 | Iustin Pop | |
578 | b7309a0d | Iustin Pop | @staticmethod
|
579 | b7309a0d | Iustin Pop | def VerifyDisks(): |
580 | d2f311db | Iustin Pop | """Run gnt-cluster verify-disks.
|
581 | d2f311db | Iustin Pop |
|
582 | d2f311db | Iustin Pop | """
|
583 | bd8210a7 | Iustin Pop | op = opcodes.OpClusterVerifyDisks() |
584 | 6dfcc47b | Iustin Pop | job_id = client.SubmitJob([op]) |
585 | 6dfcc47b | Iustin Pop | result = cli.PollJob(job_id, cl=client, feedback_fn=logging.debug)[0]
|
586 | 6dfcc47b | Iustin Pop | client.ArchiveJob(job_id) |
587 | 5188ab37 | Iustin Pop | if not isinstance(result, (tuple, list)): |
588 | 5188ab37 | Iustin Pop | logging.error("Can't get a valid result from verify-disks")
|
589 | 5188ab37 | Iustin Pop | return
|
590 | 5188ab37 | Iustin Pop | offline_disk_instances = result[2]
|
591 | 5188ab37 | Iustin Pop | if not offline_disk_instances: |
592 | 5188ab37 | Iustin Pop | # nothing to do
|
593 | 5188ab37 | Iustin Pop | return
|
594 | 5188ab37 | Iustin Pop | logging.debug("Will activate disks for instances %s",
|
595 | 1f864b60 | Iustin Pop | utils.CommaJoin(offline_disk_instances)) |
596 | 5188ab37 | Iustin Pop | # we submit only one job, and wait for it. not optimal, but spams
|
597 | 5188ab37 | Iustin Pop | # less the job queue
|
598 | 83f5d475 | Iustin Pop | job = [opcodes.OpInstanceActivateDisks(instance_name=name) |
599 | 5188ab37 | Iustin Pop | for name in offline_disk_instances] |
600 | 5188ab37 | Iustin Pop | job_id = cli.SendJob(job, cl=client) |
601 | 5188ab37 | Iustin Pop | |
602 | a9105b24 | Michael Hanselmann | try:
|
603 | a9105b24 | Michael Hanselmann | cli.PollJob(job_id, cl=client, feedback_fn=logging.debug) |
604 | a9105b24 | Michael Hanselmann | except Exception: # pylint: disable-msg=W0703 |
605 | a9105b24 | Michael Hanselmann | logging.exception("Error while activating disks")
|
606 | a8083063 | Iustin Pop | |
607 | a8083063 | Iustin Pop | |
608 | 001b3825 | Michael Hanselmann | def OpenStateFile(path): |
609 | 001b3825 | Michael Hanselmann | """Opens the state file and acquires a lock on it.
|
610 | 001b3825 | Michael Hanselmann |
|
611 | 001b3825 | Michael Hanselmann | @type path: string
|
612 | 001b3825 | Michael Hanselmann | @param path: Path to state file
|
613 | 001b3825 | Michael Hanselmann |
|
614 | 001b3825 | Michael Hanselmann | """
|
615 | 001b3825 | Michael Hanselmann | # The two-step dance below is necessary to allow both opening existing
|
616 | 001b3825 | Michael Hanselmann | # file read/write and creating if not existing. Vanilla open will truncate
|
617 | 001b3825 | Michael Hanselmann | # an existing file -or- allow creating if not existing.
|
618 | 001b3825 | Michael Hanselmann | statefile_fd = os.open(path, os.O_RDWR | os.O_CREAT) |
619 | 001b3825 | Michael Hanselmann | |
620 | 001b3825 | Michael Hanselmann | # Try to acquire lock on state file. If this fails, another watcher instance
|
621 | 001b3825 | Michael Hanselmann | # might already be running or another program is temporarily blocking the
|
622 | 001b3825 | Michael Hanselmann | # watcher from running.
|
623 | 001b3825 | Michael Hanselmann | try:
|
624 | 001b3825 | Michael Hanselmann | utils.LockFile(statefile_fd) |
625 | 001b3825 | Michael Hanselmann | except errors.LockError, err:
|
626 | 001b3825 | Michael Hanselmann | logging.error("Can't acquire lock on state file %s: %s", path, err)
|
627 | 001b3825 | Michael Hanselmann | return None |
628 | 001b3825 | Michael Hanselmann | |
629 | 001b3825 | Michael Hanselmann | return os.fdopen(statefile_fd, "w+") |
630 | 001b3825 | Michael Hanselmann | |
631 | 001b3825 | Michael Hanselmann | |
632 | db147305 | Tom Limoncelli | def IsRapiResponding(hostname): |
633 | db147305 | Tom Limoncelli | """Connects to RAPI port and does a simple test.
|
634 | db147305 | Tom Limoncelli |
|
635 | db147305 | Tom Limoncelli | Connects to RAPI port of hostname and does a simple test. At this time, the
|
636 | db147305 | Tom Limoncelli | test is GetVersion.
|
637 | db147305 | Tom Limoncelli |
|
638 | db147305 | Tom Limoncelli | @type hostname: string
|
639 | db147305 | Tom Limoncelli | @param hostname: hostname of the node to connect to.
|
640 | db147305 | Tom Limoncelli | @rtype: bool
|
641 | db147305 | Tom Limoncelli | @return: Whether RAPI is working properly
|
642 | db147305 | Tom Limoncelli |
|
643 | db147305 | Tom Limoncelli | """
|
644 | 34f06005 | Iustin Pop | curl_config = rapi.client.GenericCurlConfig() |
645 | 2a7c3583 | Michael Hanselmann | rapi_client = rapi.client.GanetiRapiClient(hostname, |
646 | 2a7c3583 | Michael Hanselmann | curl_config_fn=curl_config) |
647 | db147305 | Tom Limoncelli | try:
|
648 | db147305 | Tom Limoncelli | master_version = rapi_client.GetVersion() |
649 | db147305 | Tom Limoncelli | except rapi.client.CertificateError, err:
|
650 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: CertificateError (%s)", err)
|
651 | db147305 | Tom Limoncelli | return False |
652 | db147305 | Tom Limoncelli | except rapi.client.GanetiApiError, err:
|
653 | db147305 | Tom Limoncelli | logging.warning("RAPI Error: GanetiApiError (%s)", err)
|
654 | db147305 | Tom Limoncelli | return False |
655 | db147305 | Tom Limoncelli | logging.debug("RAPI Result: master_version is %s", master_version)
|
656 | db147305 | Tom Limoncelli | return master_version == constants.RAPI_VERSION
|
657 | db147305 | Tom Limoncelli | |
658 | db147305 | Tom Limoncelli | |
659 | a8083063 | Iustin Pop | def ParseOptions(): |
660 | a8083063 | Iustin Pop | """Parse the command line options.
|
661 | a8083063 | Iustin Pop |
|
662 | c41eea6e | Iustin Pop | @return: (options, args) as from OptionParser.parse_args()
|
663 | a8083063 | Iustin Pop |
|
664 | a8083063 | Iustin Pop | """
|
665 | a8083063 | Iustin Pop | parser = OptionParser(description="Ganeti cluster watcher",
|
666 | a8083063 | Iustin Pop | usage="%prog [-d]",
|
667 | a8083063 | Iustin Pop | version="%%prog (ganeti) %s" %
|
668 | a8083063 | Iustin Pop | constants.RELEASE_VERSION) |
669 | a8083063 | Iustin Pop | |
670 | 6d4e8ec0 | Iustin Pop | parser.add_option(cli.DEBUG_OPT) |
671 | f07521e5 | Iustin Pop | parser.add_option("-A", "--job-age", dest="job_age", |
672 | f07521e5 | Iustin Pop | help="Autoarchive jobs older than this age (default"
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673 | f07521e5 | Iustin Pop | " 6 hours)", default=6*3600) |
674 | 46c8a6ab | Iustin Pop | parser.add_option("--ignore-pause", dest="ignore_pause", default=False, |
675 | 46c8a6ab | Iustin Pop | action="store_true", help="Ignore cluster pause setting") |
676 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
677 | f07521e5 | Iustin Pop | options.job_age = cli.ParseTimespec(options.job_age) |
678 | a8083063 | Iustin Pop | return options, args
|
679 | a8083063 | Iustin Pop | |
680 | a8083063 | Iustin Pop | |
681 | 2a7c3583 | Michael Hanselmann | @rapi.client.UsesRapiClient
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682 | 9f4bb951 | Michael Hanselmann | def Main(): |
683 | a8083063 | Iustin Pop | """Main function.
|
684 | a8083063 | Iustin Pop |
|
685 | a8083063 | Iustin Pop | """
|
686 | 7260cfbe | Iustin Pop | global client # pylint: disable-msg=W0603 |
687 | e125c67c | Michael Hanselmann | |
688 | f93427cd | Iustin Pop | options, args = ParseOptions() |
689 | f93427cd | Iustin Pop | |
690 | f93427cd | Iustin Pop | if args: # watcher doesn't take any arguments |
691 | f93427cd | Iustin Pop | print >> sys.stderr, ("Usage: %s [-f] " % sys.argv[0]) |
692 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
693 | a8083063 | Iustin Pop | |
694 | 82d9caef | Iustin Pop | utils.SetupLogging(constants.LOG_WATCHER, debug=options.debug, |
695 | 82d9caef | Iustin Pop | stderr_logging=options.debug) |
696 | a8083063 | Iustin Pop | |
697 | 46c8a6ab | Iustin Pop | if ShouldPause() and not options.ignore_pause: |
698 | 3753b2cb | Michael Hanselmann | logging.debug("Pause has been set, exiting")
|
699 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
700 | 3753b2cb | Michael Hanselmann | |
701 | 001b3825 | Michael Hanselmann | statefile = OpenStateFile(constants.WATCHER_STATEFILE) |
702 | 001b3825 | Michael Hanselmann | if not statefile: |
703 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
704 | 001b3825 | Michael Hanselmann | |
705 | 24edc6d4 | Iustin Pop | update_file = False
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706 | a8083063 | Iustin Pop | try:
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707 | f1115454 | Guido Trotter | StartNodeDaemons() |
708 | 9e289e36 | Guido Trotter | RunWatcherHooks() |
709 | 50273051 | Iustin Pop | # run node maintenance in all cases, even if master, so that old
|
710 | 50273051 | Iustin Pop | # masters can be properly cleaned up too
|
711 | 50273051 | Iustin Pop | if NodeMaintenance.ShouldRun():
|
712 | 50273051 | Iustin Pop | NodeMaintenance().Exec() |
713 | c4f0219c | Iustin Pop | |
714 | 001b3825 | Michael Hanselmann | notepad = WatcherState(statefile) |
715 | 781b2b2b | Michael Hanselmann | try:
|
716 | 2c404217 | Iustin Pop | try:
|
717 | 2c404217 | Iustin Pop | client = cli.GetClient() |
718 | 2c404217 | Iustin Pop | except errors.OpPrereqError:
|
719 | 2c404217 | Iustin Pop | # this is, from cli.GetClient, a not-master case
|
720 | 7dfb83c2 | Iustin Pop | logging.debug("Not on master, exiting")
|
721 | 24edc6d4 | Iustin Pop | update_file = True
|
722 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
723 | 7dfb83c2 | Iustin Pop | except luxi.NoMasterError, err:
|
724 | 7dfb83c2 | Iustin Pop | logging.warning("Master seems to be down (%s), trying to restart",
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725 | 7dfb83c2 | Iustin Pop | str(err))
|
726 | 2826b361 | Guido Trotter | if not utils.EnsureDaemon(constants.MASTERD): |
727 | 7dfb83c2 | Iustin Pop | logging.critical("Can't start the master, exiting")
|
728 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
729 | 7dfb83c2 | Iustin Pop | # else retry the connection
|
730 | 7dfb83c2 | Iustin Pop | client = cli.GetClient() |
731 | cc962d58 | Iustin Pop | |
732 | 83052f9e | Guido Trotter | # we are on master now
|
733 | 2826b361 | Guido Trotter | utils.EnsureDaemon(constants.RAPI) |
734 | c4f0219c | Iustin Pop | |
735 | db147305 | Tom Limoncelli | # If RAPI isn't responding to queries, try one restart.
|
736 | db147305 | Tom Limoncelli | logging.debug("Attempting to talk with RAPI.")
|
737 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
738 | db147305 | Tom Limoncelli | logging.warning("Couldn't get answer from Ganeti RAPI daemon."
|
739 | db147305 | Tom Limoncelli | " Restarting Ganeti RAPI.")
|
740 | db147305 | Tom Limoncelli | utils.StopDaemon(constants.RAPI) |
741 | db147305 | Tom Limoncelli | utils.EnsureDaemon(constants.RAPI) |
742 | db147305 | Tom Limoncelli | logging.debug("Second attempt to talk with RAPI")
|
743 | 9769bb78 | Manuel Franceschini | if not IsRapiResponding(constants.IP4_ADDRESS_LOCALHOST): |
744 | db147305 | Tom Limoncelli | logging.fatal("RAPI is not responding. Please investigate.")
|
745 | db147305 | Tom Limoncelli | logging.debug("Successfully talked to RAPI.")
|
746 | db147305 | Tom Limoncelli | |
747 | cc962d58 | Iustin Pop | try:
|
748 | cc962d58 | Iustin Pop | watcher = Watcher(options, notepad) |
749 | cc962d58 | Iustin Pop | except errors.ConfigurationError:
|
750 | cc962d58 | Iustin Pop | # Just exit if there's no configuration
|
751 | 24edc6d4 | Iustin Pop | update_file = True
|
752 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS
|
753 | e125c67c | Michael Hanselmann | |
754 | cc962d58 | Iustin Pop | watcher.Run() |
755 | 24edc6d4 | Iustin Pop | update_file = True
|
756 | 24edc6d4 | Iustin Pop | |
757 | cc962d58 | Iustin Pop | finally:
|
758 | 7dfb83c2 | Iustin Pop | if update_file:
|
759 | 7dfb83c2 | Iustin Pop | notepad.Save() |
760 | 7dfb83c2 | Iustin Pop | else:
|
761 | 7dfb83c2 | Iustin Pop | logging.debug("Not updating status file due to failure")
|
762 | 1b052f42 | Michael Hanselmann | except SystemExit: |
763 | 1b052f42 | Michael Hanselmann | raise
|
764 | 38242904 | Iustin Pop | except NotMasterError:
|
765 | 438b45d4 | Michael Hanselmann | logging.debug("Not master, exiting")
|
766 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NOTMASTER
|
767 | 89e1fc26 | Iustin Pop | except errors.ResolverError, err:
|
768 | 438b45d4 | Michael Hanselmann | logging.error("Cannot resolve hostname '%s', exiting.", err.args[0]) |
769 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_NODESETUP_ERROR
|
770 | 24edc6d4 | Iustin Pop | except errors.JobQueueFull:
|
771 | 24edc6d4 | Iustin Pop | logging.error("Job queue is full, can't query cluster state")
|
772 | 24edc6d4 | Iustin Pop | except errors.JobQueueDrainError:
|
773 | 24edc6d4 | Iustin Pop | logging.error("Job queue is drained, can't maintain cluster state")
|
774 | 438b45d4 | Michael Hanselmann | except Exception, err: |
775 | 001b3825 | Michael Hanselmann | logging.exception(str(err))
|
776 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_FAILURE
|
777 | 5a3103e9 | Michael Hanselmann | |
778 | 9f4bb951 | Michael Hanselmann | return constants.EXIT_SUCCESS |