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<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [ |
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<!-- Fill in your name for FIRSTNAME and SURNAME. --> |
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<!ENTITY dhdate "<date>June 20, 2007</date>"> |
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<!ENTITY dhsection "<manvolnum>8</manvolnum>"> |
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<!ENTITY dhucpackage "<refentrytitle>ganeti-watcher</refentrytitle>"> |
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<!ENTITY dhpackage "ganeti-watcher"> |
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<!ENTITY debian "<productname>Debian</productname>"> |
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<!ENTITY gnu "<acronym>GNU</acronym>"> |
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<!ENTITY gpl "&gnu; <acronym>GPL</acronym>"> |
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<!ENTITY footer SYSTEM "footer.sgml"> |
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<refentry> |
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<refentryinfo> |
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<copyright> |
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<year>2007</year> |
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<holder>Google Inc.</holder> |
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</copyright> |
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&dhdate; |
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</refentryinfo> |
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<refmeta> |
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&dhucpackage; |
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&dhsection; |
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<refmiscinfo>ganeti 1.2</refmiscinfo> |
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</refmeta> |
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<refnamediv> |
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<refname>&dhpackage;</refname> |
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<refpurpose>ganeti cluster watcher</refpurpose> |
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</refnamediv> |
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<refsynopsisdiv> |
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<cmdsynopsis> |
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<command>&dhpackage; </command> |
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</cmdsynopsis> |
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</refsynopsisdiv> |
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<refsect1> |
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<title>DESCRIPTION</title> |
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|
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<para> |
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The <command>&dhpackage;</command> is a periodically run script |
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which is responsible for keeping the instances in the correct |
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status. |
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</para> |
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|
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<para> |
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Its primary function is to try to keep running all instances |
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which are marked as <emphasis>up</emphasis> in the configuration |
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file, by trying to start them a limited number of times. |
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</para> |
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|
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<para> |
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Its other function is to <quote>repair</quote> DRBD links by |
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reactivating the block devices of instances which have |
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secondaries on nodes that have been rebooted. |
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</para> |
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|
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<para>In order to prevent piling up commands, all the |
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<emphasis>gnt-*</emphasis> commands executed by ganeti-watcher are |
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run with a timeout of 15 seconds. |
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</para> |
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|
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<para> |
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The command has a state file located at |
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<filename>@LOCALSTATEDIR@/lib/ganeti/watcher.data</filename> and a log |
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file at |
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<filename>@LOCALSTATEDIR@/log/ganeti/watcher.log</filename>. Removal of |
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either file will not affect correct operation; the removal of |
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the state file will just cause the restart counters for the |
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instances to reset to zero. |
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</para> |
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</refsect1> |
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&footer; |
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</refentry> |
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Local variables: |
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sgml-omittag:t |
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sgml-minimize-attributes:nil |
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sgml-always-quote-attributes:t |
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sgml-parent-document:nil |
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sgml-default-dtd-file:nil |
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sgml-exposed-tags:nil |
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sgml-local-catalogs:nil |
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sgml-local-ecat-files:nil |
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End: |
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