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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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<!-- Please adjust the date whenever revising the manpage. --> |
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<!ENTITY dhdate "<date>February 11, 2009</date>"> |
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<!-- SECTION should be 1-8, maybe w/ subsection other parameters are |
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allowed: see man(7), man(1). --> |
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<!ENTITY dhsection "<manvolnum>8</manvolnum>"> |
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<!ENTITY dhucpackage "<refentrytitle>gnt-instance</refentrytitle>"> |
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<!ENTITY dhpackage "gnt-instance"> |
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|
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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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]> |
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|
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<refentry> |
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<refentryinfo> |
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<copyright> |
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<year>2006</year> |
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<year>2007</year> |
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<year>2008</year> |
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<year>2009</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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|
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&dhsection; |
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<refmiscinfo>ganeti 2.0</refmiscinfo> |
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</refmeta> |
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<refnamediv> |
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<refname>&dhpackage;</refname> |
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|
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<refpurpose>ganeti instance administration</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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|
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<arg choice="req">command</arg> |
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<arg>arguments...</arg> |
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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 used for instance |
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administration in the ganeti system. |
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</para> |
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|
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</refsect1> |
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<refsect1> |
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<title>COMMANDS</title> |
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|
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<refsect2> |
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<title>Creation/removal/querying</title> |
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|
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<refsect3> |
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<title>ADD</title> |
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<cmdsynopsis> |
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<command>add</command> |
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<sbr> |
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<arg rep="repeat">--disk=<replaceable>N</replaceable>:size=<replaceable>VAL</replaceable><arg>,mode=<replaceable>ro|rw</replaceable></arg></arg> |
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<sbr> |
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<group> |
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<arg rep="repeat">--net=<replaceable>N</replaceable><arg rep="repeat">:options</arg></arg> |
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<arg>--no-nics</arg> |
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</group> |
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<sbr> |
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<arg>-B <replaceable>BEPARAMS</replaceable></arg> |
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<sbr> |
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|
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<arg>-H <replaceable>HYPERVISOR</replaceable><arg>:<arg choice="plain" rep="repeat">option=<replaceable>value</replaceable></arg></arg></arg> |
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<sbr> |
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|
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<arg>--file-storage-dir <replaceable>dir_path</replaceable></arg> |
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<arg>--file-driver<group choice="req"> |
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<arg>loop</arg> |
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<arg>blktap</arg> |
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</group></arg> |
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<sbr> |
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|
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<arg choice="req">-t<group choice="req"> |
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<arg>diskless</arg> |
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<arg>file</arg> |
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<arg>plain</arg> |
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<arg>drbd</arg> |
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</group></arg> |
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<sbr> |
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|
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<group choice="req"> |
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<arg>-n <replaceable>node<optional>:secondary-node</optional></replaceable></arg> |
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<arg>--iallocator <replaceable>name</replaceable></arg> |
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</group> |
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<sbr> |
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|
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<arg choice="req">-o <replaceable>os-type</replaceable></arg> |
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<sbr> |
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<arg>--submit</arg> |
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<sbr> |
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|
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<arg choice="req"><replaceable>instance</replaceable></arg> |
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</cmdsynopsis> |
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|
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<para> |
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Creates a new instance on the specified host. The |
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<replaceable>instance</replaceable> argument must be in DNS, |
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but depending on the bridge setup, need not be in the same |
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network as the nodes in the cluster. |
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</para> |
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|
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<para> |
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The <option>disk</option> option specifies the parameters |
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for the disks of the instance. The numbering of disks starts |
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at zero, and at least one disk needs to be passed. For each |
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disk, at least the size needs to be given, and optionally |
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the access mode (read-only or the default of read-write) can |
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also be specified. The size is interpreted (when no unit is |
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given) in mebibytes. You can also use one of the suffixes |
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<literal>m</literal>, <literal>g</literal> or |
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<literal>t</literal> to specificy the exact the units used; |
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these suffixes map to mebibytes, gibibytes and tebibytes. |
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</para> |
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|
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<para> |
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The minimum disk specification is therefore |
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<userinput>--disk 0:size=20G</userinput>, and a three-disk |
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instance can be specified as <userinput>--disk 0:size=20G |
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--disk 1:size=4G --disk 2:size=100G</userinput>. |
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</para> |
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|
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<para> |
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The NICs of the instances can be specified via the |
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<option>--nic</option> option. By default, one NIC is |
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created for the instance, with a random MAC, and connected |
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to the default bridge. Each NIC can take up to three |
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parameters (all optional): |
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<variablelist> |
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<varlistentry> |
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<term>mac</term> |
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<listitem> |
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<simpara>either a value or <constant>GENERATE</constant> |
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to generate a new unique MAC</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>ip</term> |
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<listitem> |
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<simpara>specifies the IP address assigned to the |
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instance from the Ganeti side (this is not necessarily |
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what the instance will use, but what the node expects |
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the instance to use)</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>bridge</term> |
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<listitem> |
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<simpara>specifies the bridge to attach this NIC |
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to</simpara> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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</para> |
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|
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<para> |
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Alternatively, if no network is desired for the instance, you |
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can prevent the default of one NIC with the |
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<option>--no-nics</option> option. |
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</para> |
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|
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<para> |
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The <option>-o</option> options specifies the operating |
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system to be installed. The available operating systems can |
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be listed with <command>gnt-os list</command>. |
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</para> |
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|
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<para> |
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The <option>-B</option> option specifies the backend |
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parameters for the instance. If no such parameters are |
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specified, the values are inherited from the cluster. Possible |
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parameters are: |
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<variablelist> |
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<varlistentry> |
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<term>memory</term> |
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<listitem> |
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<simpara>the memory size of the instance; as usual, |
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suffixes can be used to denote the unit, otherwise the |
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value is taken in mebibites</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>vcpus</term> |
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<listitem> |
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<simpara>the number of VCPUs to assign to the instance |
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(if this value makes sense for the hypervisor)</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>auto_balance</term> |
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<listitem> |
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<simpara>whether the instance is considered in the N+1 |
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cluster checks (enough redundancy in the cluster to |
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survive a node failure)</simpara> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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</para> |
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|
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<para> |
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The <option>-H</option> option specified the hypervisor to |
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use for the instance (must be one of the enabled hypervisors |
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on the cluster) and optionally custom parameters for this |
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instance. If not other options are used (i.e. the invocation |
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is just <userinput>-H |
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<replaceable>NAME</replaceable></userinput>) the instance |
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will inherit the cluster options. The defaults below show |
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the cluster defaults at cluster creation time. |
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</para> |
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|
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<para> |
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The possible hypervisor options are as follows: |
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<variablelist> |
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<varlistentry> |
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<term>boot_order</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM |
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hypervisors.</simpara> |
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|
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<simpara>A string value denoting the boot order. This |
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has different meaning for the Xen HVM hypervisor and |
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for the KVM one.</simpara> |
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|
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<simpara> |
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For Xen HVM, The boot order is a string of letters |
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listing the boot devices, with valid device letters |
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being: |
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</simpara> |
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<variablelist> |
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<varlistentry> |
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<term>a</term> |
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<listitem> |
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<para> |
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floppy drive |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>c</term> |
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<listitem> |
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<para> |
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hard disk |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>d</term> |
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<listitem> |
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<para> |
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CDROM drive |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>n</term> |
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<listitem> |
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<para> |
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network boot (PXE) |
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</para> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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<simpara> |
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The default is not to set an HVM boot order which is |
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interpreted as 'dc'. |
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</simpara> |
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|
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>cdrom_image_path</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<simpara>The path to a CDROM image to attach to the |
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instance.</simpara> |
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|
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>nic_type</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<para> |
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This parameter determines the way the network cards |
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are presented to the instance. The possible options are: |
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<simplelist> |
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<member>rtl8139 (default for Xen HVM) (HVM & KVM)</member> |
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<member>ne2k_isa (HVM & KVM)</member> |
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<member>ne2k_pci (HVM & KVM)</member> |
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<member>i82551 (KVM)</member> |
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<member>i82557b (KVM)</member> |
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<member>i82559er (KVM)</member> |
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<member>pcnet (KVM)</member> |
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<member>e1000 (KVM)</member> |
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<member>paravirtual (default for KVM) (HVM & KVM)</member> |
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</simplelist> |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>disk_type</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<para> |
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This parameter determines the way the disks are |
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presented to the instance. The possible options are: |
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<simplelist> |
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<member>ioemu (default for HVM & KVM) (HVM & KVM)</member> |
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<member>ide (HVM & KVM)</member> |
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<member>scsi (KVM)</member> |
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<member>sd (KVM)</member> |
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<member>mtd (KVM)</member> |
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<member>pflash (KVM)</member> |
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</simplelist> |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>vnc_bind_address</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<para>Specifies the address that the VNC listener for |
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this instance should bind to. Valid values are IPv4 |
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addresses. Use the address 0.0.0.0 to bind to all |
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available interfaces (this is the default) or specify |
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the address of one of the interfaces on the node to |
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restrict listening to that interface.</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>vnc_tls</term> |
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<listitem> |
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<simpara>Valid for the KVM hypervisor.</simpara> |
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|
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<simpara>A boolean option that controls whether the |
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VNC connection is secured with TLS.</simpara> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>vnc_x509_path</term> |
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<listitem> |
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<simpara>Valid for the KVM hypervisor.</simpara> |
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|
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<para>If <option>vnc_tls</option> is enabled, this |
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options specifies the path to the x509 certificate to |
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use.</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>vnc_x509_verify</term> |
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<listitem> |
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<simpara>Valid for the KVM hypervisor.</simpara> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>acpi</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<para> |
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A boolean option that specifies if the hypervisor |
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should enable ACPI support for this instance. By |
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default, ACPI is disabled. |
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</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>pae</term> |
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<listitem> |
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<simpara>Valid for the Xen HVM and KVM hypervisors.</simpara> |
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|
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<para> |
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A boolean option that specifies if the hypervisor |
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should enabled PAE support for this instance. The |
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default is false, disabling PAE support. |
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</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>kernel_path</term> |
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<listitem> |
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<simpara>Valid for the Xen PVM and KVM hypervisors.</simpara> |
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|
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<para> |
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This option specifies the path (on the node) to the |
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kernel to boot the instance with. Xen PVM instances |
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always require this, while for KVM if this option is |
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empty, it will cause the machine to load the kernel |
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from its disks. |
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</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>initrd_path</term> |
420 |
<listitem> |
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<simpara>Valid for the Xen PVM and KVM hypervisors.</simpara> |
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|
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<para> |
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This option specifies the path (on the node) to the |
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initrd to boot the instance with. Xen PVM instances |
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can use this always, while for KVM if this option is |
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only used if the <option>kernel_path</option> option |
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is also specified. |
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</para> |
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</listitem> |
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</varlistentry> |
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|
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<varlistentry> |
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<term>root_path</term> |
435 |
<listitem> |
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<simpara>Valid for the Xen PVM and KVM hypervisors.</simpara> |
437 |
|
438 |
<para> |
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This options specifies the name of the root |
440 |
device. This is always needed for Xen PVM, while for |
441 |
KVM it is only used if the |
442 |
<option>kernel_path</option> option is also |
443 |
specified. |
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</para> |
445 |
</listitem> |
446 |
</varlistentry> |
447 |
|
448 |
<varlistentry> |
449 |
<term>serial_console</term> |
450 |
<listitem> |
451 |
<simpara>Valid for the KVM hypervisor.</simpara> |
452 |
|
453 |
<simpara>This boolean option specifies whether to |
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emulate a serial console for the instance.</simpara> |
455 |
</listitem> |
456 |
</varlistentry> |
457 |
</variablelist> |
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</para> |
459 |
|
460 |
<para> |
461 |
</para> |
462 |
|
463 |
<para> |
464 |
The <option>--iallocator</option> option specifies the instance |
465 |
allocator plugin to use. If you pass in this option the allocator |
466 |
will select nodes for this instance automatically, so you don't need |
467 |
to pass them with the <option>-n</option> option. For more |
468 |
information please refer to the instance allocator documentation. |
469 |
</para> |
470 |
|
471 |
<para> |
472 |
The <option>-t</option> options specifies the disk layout type for |
473 |
the instance. The available choices are: |
474 |
<variablelist> |
475 |
<varlistentry> |
476 |
<term>diskless</term> |
477 |
<listitem> |
478 |
<para> |
479 |
This creates an instance with no disks. Its useful for |
480 |
testing only (or other special cases). |
481 |
</para> |
482 |
</listitem> |
483 |
</varlistentry> |
484 |
<varlistentry> |
485 |
<term>file</term> |
486 |
<listitem> |
487 |
<para>Disk devices will be regular files.</para> |
488 |
</listitem> |
489 |
</varlistentry> |
490 |
<varlistentry> |
491 |
<term>plain</term> |
492 |
<listitem> |
493 |
<para>Disk devices will be logical volumes.</para> |
494 |
</listitem> |
495 |
</varlistentry> |
496 |
<varlistentry> |
497 |
<term>drbd</term> |
498 |
<listitem> |
499 |
<para> |
500 |
Disk devices will be drbd (version 8.x) on top of |
501 |
lvm volumes. |
502 |
</para> |
503 |
</listitem> |
504 |
</varlistentry> |
505 |
</variablelist> |
506 |
</para> |
507 |
|
508 |
<para> |
509 |
The optional second value of the <option>--node</option> is used for |
510 |
the drbd template type and specifies the remote node. |
511 |
</para> |
512 |
|
513 |
<para> |
514 |
If you do not want gnt-instance to wait for the disk mirror |
515 |
to be synced, use the <option>--no-wait-for-sync</option> |
516 |
option. |
517 |
</para> |
518 |
|
519 |
<para> |
520 |
The <option>--file-storage-dir</option> specifies the relative path |
521 |
under the cluster-wide file storage directory to store file-based |
522 |
disks. It is useful for having different subdirectories for |
523 |
different instances. The full path of the directory where the disk |
524 |
files are stored will consist of cluster-wide file storage directory |
525 |
+ optional subdirectory + instance name. Example: |
526 |
/srv/ganeti/file-storage/mysubdir/instance1.example.com. This option |
527 |
is only relevant for instances using the file storage backend. |
528 |
</para> |
529 |
|
530 |
<para> |
531 |
The <option>--file-driver</option> specifies the driver to use for |
532 |
file-based disks. Note that currently these drivers work with the |
533 |
xen hypervisor only. This option is only relevant for instances using |
534 |
the file storage backend. The available choices are: |
535 |
<variablelist> |
536 |
<varlistentry> |
537 |
<term>loop</term> |
538 |
<listitem> |
539 |
<para> |
540 |
Kernel loopback driver. This driver uses loopback |
541 |
devices to access the filesystem within the |
542 |
file. However, running I/O intensive applications in |
543 |
your instance using the loop driver might result in |
544 |
slowdowns. Furthermore, if you use the loopback |
545 |
driver consider increasing the maximum amount of |
546 |
loopback devices (on most systems it's 8) using the |
547 |
max_loop param. |
548 |
</para> |
549 |
</listitem> |
550 |
</varlistentry> |
551 |
<varlistentry> |
552 |
<term>blktap</term> |
553 |
<listitem> |
554 |
<para>The blktap driver (for Xen hypervisors). In |
555 |
order to be able to use the blktap driver you should |
556 |
check if the 'blktapctrl' user space disk agent is |
557 |
running (usually automatically started via xend). This |
558 |
user-level disk I/O interface has the advantage of |
559 |
better performance. Especially if you use a network |
560 |
file system (e.g. NFS) to store your instances this is |
561 |
the recommended choice. |
562 |
</para> |
563 |
</listitem> |
564 |
</varlistentry> |
565 |
</variablelist> |
566 |
</para> |
567 |
|
568 |
<para> |
569 |
The <option>--submit</option> option is used to send the job to |
570 |
the master daemon but not wait for its completion. The job |
571 |
ID will be shown so that it can be examined via |
572 |
<command>gnt-job info</command>. |
573 |
</para> |
574 |
|
575 |
<para> |
576 |
Example: |
577 |
<screen> |
578 |
# gnt-instance add -t file --disk 0:size=30g -B memory=512 -o debian-etch \ |
579 |
-n node1.example.com --file-storage-dir=mysubdir instance1.example.com |
580 |
# gnt-instance add -t plain --disk 0:size=30g -B memory=512 -o debian-etch \ |
581 |
-n node1.example.com instance1.example.com |
582 |
# gnt-instance add -t drbd --disk 0:size=30g -B memory=512 -o debian-etch \ |
583 |
-n node1.example.com:node2.example.com instance2.example.com |
584 |
</screen> |
585 |
</para> |
586 |
</refsect3> |
587 |
|
588 |
<refsect3> |
589 |
<title>BATCH-CREATE</title> |
590 |
<cmdsynopsis> |
591 |
<command>batch-create</command> |
592 |
<arg choice="req">instances_file.json</arg> |
593 |
</cmdsynopsis> |
594 |
|
595 |
<para> |
596 |
This command (similar to the Ganeti 1.2 |
597 |
<command>batcher</command> tool) submits multiple instance |
598 |
creation jobs based on a definition file. The instance |
599 |
configurations do not encompass all the possible options for |
600 |
the <command>add</command> command, but only a subset. |
601 |
</para> |
602 |
|
603 |
<para> |
604 |
The instance file should be a valid-formed JSON file, |
605 |
containing a dictionary with instance name and instance |
606 |
parameters. The accepted parameters are: |
607 |
|
608 |
<variablelist> |
609 |
<varlistentry> |
610 |
<term>disk_size</term> |
611 |
<listitem> |
612 |
<simpara>The size of the disks of the instance.</simpara> |
613 |
</listitem> |
614 |
</varlistentry> |
615 |
<varlistentry> |
616 |
<term>disk_templace</term> |
617 |
<listitem> |
618 |
<simpara>The disk template to use for the instance, |
619 |
the same as in the <command>add</command> |
620 |
command.</simpara> |
621 |
</listitem> |
622 |
</varlistentry> |
623 |
<varlistentry> |
624 |
<term>backend</term> |
625 |
<listitem> |
626 |
<simpara>A dictionary of backend parameters.</simpara> |
627 |
</listitem> |
628 |
</varlistentry> |
629 |
<varlistentry> |
630 |
<term>hypervisor</term> |
631 |
<listitem> |
632 |
<simpara>A dictionary with a single key (the |
633 |
hypervisor name), and as value the hypervisor |
634 |
options. If not passed, the default hypervisor and |
635 |
hypervisor options will be inherited.</simpara> |
636 |
</listitem> |
637 |
</varlistentry> |
638 |
<varlistentry> |
639 |
<term>mac, ip, bridge</term> |
640 |
<listitem> |
641 |
<simpara>Specifications for the one NIC that will be |
642 |
created for the instance.</simpara> |
643 |
</listitem> |
644 |
</varlistentry> |
645 |
<varlistentry> |
646 |
<term>primary_node, secondary_node</term> |
647 |
<listitem> |
648 |
<simpara>The primary and optionally the secondary node |
649 |
to use for the instance (in case an iallocator script |
650 |
is not used).</simpara> |
651 |
</listitem> |
652 |
</varlistentry> |
653 |
<varlistentry> |
654 |
<term>iallocator</term> |
655 |
<listitem> |
656 |
<simpara>Instead of specifying the nodes, an |
657 |
iallocator script can be used to automatically compute |
658 |
them.</simpara> |
659 |
</listitem> |
660 |
</varlistentry> |
661 |
<varlistentry> |
662 |
<term>start</term> |
663 |
<listitem> |
664 |
<simpara>whether to start the instance</simpara> |
665 |
</listitem> |
666 |
</varlistentry> |
667 |
<varlistentry> |
668 |
<term>ip_check</term> |
669 |
<listitem> |
670 |
<simpara>Skip the check for already-in-use instance; |
671 |
see the description in the <command>add</command> |
672 |
command for details.</simpara> |
673 |
</listitem> |
674 |
</varlistentry> |
675 |
<varlistentry> |
676 |
<term>file_storage_dir, file_driver</term> |
677 |
<listitem> |
678 |
<simpara>Configuration for the <literal>file</literal> |
679 |
disk type, see the <command>add</command> command for |
680 |
details.</simpara> |
681 |
</listitem> |
682 |
</varlistentry> |
683 |
</variablelist> |
684 |
</para> |
685 |
|
686 |
<para> |
687 |
A simple definition for one instance can be (with most of |
688 |
the parameters taken from the cluster defaults): |
689 |
<screen> |
690 |
{ |
691 |
"instance3": { |
692 |
"template": "drbd", |
693 |
"os": "debootstrap", |
694 |
"disk_size": ["25G"], |
695 |
"iallocator": "dumb" |
696 |
}, |
697 |
"instance5": { |
698 |
"template": "drbd", |
699 |
"os": "debootstrap", |
700 |
"disk_size": ["25G"], |
701 |
"iallocator": "dumb", |
702 |
"hypervisor": "xen-hvm", |
703 |
"hvparams": {"acpi": true}, |
704 |
"backend": {"memory": 512} |
705 |
} |
706 |
} |
707 |
</screen> |
708 |
</para> |
709 |
|
710 |
<para> |
711 |
The command will display the job id for each submitted instance, as follows: |
712 |
<screen> |
713 |
# gnt-instance batch-create instances.json |
714 |
instance3: 11224 |
715 |
instance5: 11225 |
716 |
</screen> |
717 |
</para> |
718 |
|
719 |
</refsect3> |
720 |
|
721 |
<refsect3> |
722 |
<title>REMOVE</title> |
723 |
|
724 |
<cmdsynopsis> |
725 |
<command>remove</command> |
726 |
<arg>--ignore-failures</arg> |
727 |
<arg>--submit</arg> |
728 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
729 |
</cmdsynopsis> |
730 |
|
731 |
<para> |
732 |
Remove an instance. This will remove all data from the |
733 |
instance and there is <emphasis>no way back</emphasis>. If |
734 |
you are not sure if you use an instance again, use |
735 |
<command>shutdown</command> first and leave it in the |
736 |
shutdown state for a while. |
737 |
|
738 |
</para> |
739 |
|
740 |
<para> |
741 |
The <option>--ignore-failures</option> option will cause the |
742 |
removal to proceed even in the presence of errors during the |
743 |
removal of the instance (e.g. during the shutdown or the |
744 |
disk removal). If this option is not given, the command will |
745 |
stop at the first error. |
746 |
</para> |
747 |
|
748 |
<para> |
749 |
The <option>--submit</option> option is used to send the job to |
750 |
the master daemon but not wait for its completion. The job |
751 |
ID will be shown so that it can be examined via |
752 |
<command>gnt-job info</command>. |
753 |
</para> |
754 |
|
755 |
<para> |
756 |
Example: |
757 |
<screen> |
758 |
# gnt-instance remove instance1.example.com |
759 |
</screen> |
760 |
</para> |
761 |
</refsect3> |
762 |
|
763 |
<refsect3> |
764 |
<title>LIST</title> |
765 |
|
766 |
<cmdsynopsis> |
767 |
<command>list</command> |
768 |
<arg>--no-headers</arg> |
769 |
<arg>--separator=<replaceable>SEPARATOR</replaceable></arg> |
770 |
<arg>-o <replaceable>[+]FIELD,...</replaceable></arg> |
771 |
<arg rep="repeat">instance</arg> |
772 |
</cmdsynopsis> |
773 |
|
774 |
<para> |
775 |
Shows the currently configured instances with memory usage, |
776 |
disk usage, the node they are running on, and their run |
777 |
status. |
778 |
</para> |
779 |
|
780 |
<para> |
781 |
The <option>--no-headers</option> option will skip the |
782 |
initial header line. The <option>--separator</option> option |
783 |
takes an argument which denotes what will be used between |
784 |
the output fields. Both these options are to help scripting. |
785 |
</para> |
786 |
|
787 |
<para> |
788 |
The <option>-o</option> option takes a comma-separated list |
789 |
of output fields. The available fields and their meaning |
790 |
are: |
791 |
<variablelist> |
792 |
<varlistentry> |
793 |
<term>name</term> |
794 |
<listitem> |
795 |
<simpara>the instance name</simpara> |
796 |
</listitem> |
797 |
</varlistentry> |
798 |
<varlistentry> |
799 |
<term>os</term> |
800 |
<listitem> |
801 |
<simpara>the OS of the instance</simpara> |
802 |
</listitem> |
803 |
</varlistentry> |
804 |
<varlistentry> |
805 |
<term>pnode</term> |
806 |
<listitem> |
807 |
<simpara>the primary node of the instance</simpara> |
808 |
</listitem> |
809 |
</varlistentry> |
810 |
<varlistentry> |
811 |
<term>snodes</term> |
812 |
<listitem> |
813 |
<simpara>comma-separated list of secondary nodes for the |
814 |
instance; usually this will be just one node</simpara> |
815 |
</listitem> |
816 |
</varlistentry> |
817 |
<varlistentry> |
818 |
<term>admin_state</term> |
819 |
<listitem> |
820 |
<simpara>the desired state of the instance (either "yes" |
821 |
or "no" denoting the instance should run or |
822 |
not)</simpara> |
823 |
</listitem> |
824 |
</varlistentry> |
825 |
<varlistentry> |
826 |
<term>disk_template</term> |
827 |
<listitem> |
828 |
<simpara>the disk template of the instance</simpara> |
829 |
</listitem> |
830 |
</varlistentry> |
831 |
<varlistentry> |
832 |
<term>oper_state</term> |
833 |
<listitem> |
834 |
<simpara>the actual state of the instance; can be |
835 |
one of the values "running", "stopped", "(node |
836 |
down)"</simpara> |
837 |
</listitem> |
838 |
</varlistentry> |
839 |
<varlistentry> |
840 |
<term>status</term> |
841 |
<listitem> |
842 |
<simpara>combined form of admin_state and oper_stat; |
843 |
this can be one of: |
844 |
<computeroutput>ERROR_nodedown</computeroutput> if the |
845 |
node of the instance is down, |
846 |
<computeroutput>ERROR_down</computeroutput> if the |
847 |
instance should run but is down, |
848 |
<computeroutput>ERROR_up</computeroutput> if the |
849 |
instance should be stopped but is actually running, |
850 |
<computeroutput>ADMIN_down</computeroutput> if the |
851 |
instance has been stopped (and is stopped) and |
852 |
<computeroutput>running</computeroutput> if the |
853 |
instance is set to be running (and is |
854 |
running)</simpara> |
855 |
</listitem> |
856 |
</varlistentry> |
857 |
<varlistentry> |
858 |
<term>oper_ram</term> |
859 |
<listitem> |
860 |
<simpara>the actual memory usage of the instance as seen |
861 |
by the hypervisor</simpara> |
862 |
</listitem> |
863 |
</varlistentry> |
864 |
<varlistentry> |
865 |
<term>ip</term> |
866 |
<listitem> |
867 |
<simpara>the ip address ganeti recognizes as associated with |
868 |
the first instance interface</simpara> |
869 |
</listitem> |
870 |
</varlistentry> |
871 |
<varlistentry> |
872 |
<term>mac</term> |
873 |
<listitem> |
874 |
<simpara>the first instance interface MAC address</simpara> |
875 |
</listitem> |
876 |
</varlistentry> |
877 |
<varlistentry> |
878 |
<term>bridge</term> |
879 |
<listitem> |
880 |
<simpara>the bridge of the first instance NIC |
881 |
</simpara> |
882 |
</listitem> |
883 |
</varlistentry> |
884 |
<varlistentry> |
885 |
<term>sda_size</term> |
886 |
<listitem> |
887 |
<simpara>the size of the instance's first disk</simpara> |
888 |
</listitem> |
889 |
</varlistentry> |
890 |
<varlistentry> |
891 |
<term>sdb_size</term> |
892 |
<listitem> |
893 |
<simpara>the size of the instance's second disk, if |
894 |
any</simpara> |
895 |
</listitem> |
896 |
</varlistentry> |
897 |
<varlistentry> |
898 |
<term>vcpus</term> |
899 |
<listitem> |
900 |
<simpara>the number of VCPUs allocated to the |
901 |
instance</simpara> |
902 |
</listitem> |
903 |
</varlistentry> |
904 |
<varlistentry> |
905 |
<term>tags</term> |
906 |
<listitem> |
907 |
<simpara>comma-separated list of the instances's |
908 |
tags</simpara> |
909 |
</listitem> |
910 |
</varlistentry> |
911 |
<varlistentry> |
912 |
<term>serial_no</term> |
913 |
<listitem> |
914 |
<simpara>the so called 'serial number' of the |
915 |
instance; this is a numeric field that is incremented |
916 |
each time the instance is modified, and it can be used |
917 |
to track modifications</simpara> |
918 |
</listitem> |
919 |
</varlistentry> |
920 |
<varlistentry> |
921 |
<term>network_port</term> |
922 |
<listitem> |
923 |
<simpara>If the instance has a network port assigned |
924 |
to it (e.g. for VNC connections), this will be shown, |
925 |
otherwise <literal>-</literal> will be |
926 |
displayed.</simpara> |
927 |
</listitem> |
928 |
</varlistentry> |
929 |
<varlistentry> |
930 |
<term>beparams</term> |
931 |
<listitem> |
932 |
<simpara>A text format of the entire beparams for the |
933 |
instance. It's more useful to select individual fields |
934 |
from this dictionary, see below.</simpara> |
935 |
</listitem> |
936 |
</varlistentry> |
937 |
<varlistentry> |
938 |
<term>disk.count</term> |
939 |
<listitem> |
940 |
<simpara>The number of instance disks.</simpara> |
941 |
</listitem> |
942 |
</varlistentry> |
943 |
<varlistentry> |
944 |
<term>disk.size/N</term> |
945 |
<listitem> |
946 |
<simpara>The size of the instance's Nth disk. This is |
947 |
a more generic form of the <literal>sda_size</literal> |
948 |
and <literal>sdb_size</literal> fields.</simpara> |
949 |
</listitem> |
950 |
</varlistentry> |
951 |
<varlistentry> |
952 |
<term>disk.sizes</term> |
953 |
<listitem> |
954 |
<simpara>A comma-separated list of the disk sizes for |
955 |
this instance.</simpara> |
956 |
</listitem> |
957 |
</varlistentry> |
958 |
<varlistentry> |
959 |
<term>disk_usage</term> |
960 |
<listitem> |
961 |
<simpara>The total disk space used by this instance on |
962 |
each of its nodes. This is not the instance-visible |
963 |
disk size, but the actual disk "cost" of the |
964 |
instance.</simpara> |
965 |
</listitem> |
966 |
</varlistentry> |
967 |
<varlistentry> |
968 |
<term>nic.mac/N</term> |
969 |
<listitem> |
970 |
<simpara>The MAC of the Nth instance NIC.</simpara> |
971 |
</listitem> |
972 |
</varlistentry> |
973 |
<varlistentry> |
974 |
<term>nic.ip/N</term> |
975 |
<listitem> |
976 |
<simpara>The IP address of the Nth instance NIC.</simpara> |
977 |
</listitem> |
978 |
</varlistentry> |
979 |
<varlistentry> |
980 |
<term>nic.bridge/N</term> |
981 |
<listitem> |
982 |
<simpara>The bridge the Nth instance NIC is attached |
983 |
to.</simpara> |
984 |
</listitem> |
985 |
</varlistentry> |
986 |
<varlistentry> |
987 |
<term>nic.macs</term> |
988 |
<listitem> |
989 |
<simpara>A comma-separated list of all the MACs of the |
990 |
instance's NICs.</simpara> |
991 |
</listitem> |
992 |
</varlistentry> |
993 |
<varlistentry> |
994 |
<term>nic.ips</term> |
995 |
<listitem> |
996 |
<simpara>A comma-separated list of all the IP |
997 |
addresses of the instance's NICs.</simpara> |
998 |
</listitem> |
999 |
</varlistentry> |
1000 |
<varlistentry> |
1001 |
<term>nic.bridges</term> |
1002 |
<listitem> |
1003 |
<simpara>A comma-separated list of all the bridges of the |
1004 |
instance's NICs.</simpara> |
1005 |
</listitem> |
1006 |
</varlistentry> |
1007 |
<varlistentry> |
1008 |
<term>nic.count</term> |
1009 |
<listitem> |
1010 |
<simpara>The number of instance nics.</simpara> |
1011 |
</listitem> |
1012 |
</varlistentry> |
1013 |
<varlistentry> |
1014 |
<term>hv/<replaceable>NAME</replaceable></term> |
1015 |
<listitem> |
1016 |
<simpara>The value of the hypervisor parameter called |
1017 |
<replaceable>NAME</replaceable>. For details of what |
1018 |
hypervisor parameters exist and their meaning, see the |
1019 |
<command>add</command> command.</simpara> |
1020 |
</listitem> |
1021 |
</varlistentry> |
1022 |
<varlistentry> |
1023 |
<term>be/memory</term> |
1024 |
<listitem> |
1025 |
<simpara>The configured memory for the instance.</simpara> |
1026 |
</listitem> |
1027 |
</varlistentry> |
1028 |
<varlistentry> |
1029 |
<term>be/vcpus</term> |
1030 |
<listitem> |
1031 |
<simpara>The configured number of VCPUs for the |
1032 |
instance.</simpara> |
1033 |
</listitem> |
1034 |
</varlistentry> |
1035 |
<varlistentry> |
1036 |
<term>be/auto_balance</term> |
1037 |
<listitem> |
1038 |
<simpara>Whether the instance is considered in N+1 |
1039 |
checks.</simpara> |
1040 |
</listitem> |
1041 |
</varlistentry> |
1042 |
</variablelist> |
1043 |
</para> |
1044 |
|
1045 |
<para> |
1046 |
If the value of the option starts with the character |
1047 |
<constant>+</constant>, the new field(s) will be added to the |
1048 |
default list. This allows to quickly see the default list |
1049 |
plus a few other fields, instead of retyping the entire list |
1050 |
of fields. |
1051 |
</para> |
1052 |
|
1053 |
<para> |
1054 |
There is a subtle grouping about the available output |
1055 |
fields: all fields except for <option>oper_state</option>, |
1056 |
<option>oper_ram</option> and <option>status</option> are |
1057 |
configuration value and not run-time values. So if you don't |
1058 |
select any of the these fields, the query will be satisfied |
1059 |
instantly from the cluster configuration, without having to |
1060 |
ask the remote nodes for the data. This can be helpful for |
1061 |
big clusters when you only want some data and it makes sense |
1062 |
to specify a reduced set of output fields. |
1063 |
</para> |
1064 |
|
1065 |
<para>The default output field list is: |
1066 |
<simplelist type="inline"> |
1067 |
<member>name</member> |
1068 |
<member>os</member> |
1069 |
<member>pnode</member> |
1070 |
<member>admin_state</member> |
1071 |
<member>oper_state</member> |
1072 |
<member>oper_ram</member> |
1073 |
</simplelist>. |
1074 |
</para> |
1075 |
</refsect3> |
1076 |
|
1077 |
<refsect3> |
1078 |
<title>INFO</title> |
1079 |
|
1080 |
<cmdsynopsis> |
1081 |
<command>info</command> |
1082 |
<group> |
1083 |
<arg>-s</arg> |
1084 |
<arg>--static</arg> |
1085 |
</group> |
1086 |
<arg rep="repeat"><replaceable>instance</replaceable></arg> |
1087 |
</cmdsynopsis> |
1088 |
|
1089 |
<para> |
1090 |
Show detailed information about the (given) instances. This |
1091 |
is different from <command>list</command> as it shows |
1092 |
detailed data about the instance's disks (especially useful |
1093 |
for drbd disk template). |
1094 |
</para> |
1095 |
|
1096 |
<para> |
1097 |
If the option <option>-s</option> is used, only information |
1098 |
available in the configuration file is returned, without |
1099 |
querying nodes, making the operation faster. |
1100 |
</para> |
1101 |
</refsect3> |
1102 |
|
1103 |
<refsect3> |
1104 |
<title>MODIFY</title> |
1105 |
|
1106 |
<cmdsynopsis> |
1107 |
<command>modify</command> |
1108 |
<sbr> |
1109 |
<arg choice="opt">-H <replaceable>HYPERVISOR_PARAMETERS</replaceable></arg> |
1110 |
<sbr> |
1111 |
<arg choice="opt">-B <replaceable>BACKEND_PARAMETERS</replaceable></arg> |
1112 |
<sbr> |
1113 |
<group> |
1114 |
<arg>--net add<replaceable><optional>:options</optional></replaceable></arg> |
1115 |
<arg>--net remove</arg> |
1116 |
<arg>--net <replaceable>N:options</replaceable></arg> |
1117 |
</group> |
1118 |
<sbr> |
1119 |
<group> |
1120 |
<arg>--disk add:size=<replaceable>SIZE</replaceable></arg> |
1121 |
<arg>--disk remove</arg> |
1122 |
<arg>--disk <replaceable>N</replaceable>:mode=<replaceable>MODE</replaceable></arg> |
1123 |
</group> |
1124 |
|
1125 |
<sbr> |
1126 |
<arg>--submit</arg> |
1127 |
<sbr> |
1128 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1129 |
</cmdsynopsis> |
1130 |
|
1131 |
<para> |
1132 |
Modifies the memory size, number of vcpus, ip address, MAC |
1133 |
address and/or bridge for an instance. It can also add and |
1134 |
remove disks and NICs to/from the instance. Note that you |
1135 |
need to give at least one of the arguments, otherwise the |
1136 |
command complains. |
1137 |
</para> |
1138 |
|
1139 |
<para> |
1140 |
The <option>-H</option> option specifies hypervisor options |
1141 |
in the form of <userinput>name=value[,...]</userinput>. For details which options can be specified, see the <command>add</command> command. |
1142 |
</para> |
1143 |
|
1144 |
<para> |
1145 |
The <option>--disk |
1146 |
add:size=<replaceable>SIZE</replaceable></option> option |
1147 |
adds a disk to the instance. The <option>--disk |
1148 |
remove</option> will remove the last disk of the |
1149 |
instance. The <option>--disk |
1150 |
<replaceable>N</replaceable>:mode=<replaceable>MODE</replaceable></option> |
1151 |
option will change the mode of the Nth disk of the instance |
1152 |
between read-only (<literal>ro</literal>) and read-write |
1153 |
(<literal>rw</literal>). |
1154 |
</para> |
1155 |
|
1156 |
<para> |
1157 |
The <option>--nic |
1158 |
add:<replaceable>options</replaceable></option> option will |
1159 |
add a new NIC to the instance. The available options are the |
1160 |
same as in the <command>add</command> command (mac, ip, |
1161 |
bridge). The <option>--nice remove</option> will remove the |
1162 |
last NIC of the instance, while the <option>--nic |
1163 |
<replaceable>N</replaceable>:<replaceable>options</replaceable></option> |
1164 |
option will change the parameters of the Nth instance NIC. |
1165 |
</para> |
1166 |
|
1167 |
<para> |
1168 |
The <option>--submit</option> option is used to send the job to |
1169 |
the master daemon but not wait for its completion. The job |
1170 |
ID will be shown so that it can be examined via |
1171 |
<command>gnt-job info</command>. |
1172 |
</para> |
1173 |
|
1174 |
<para> |
1175 |
All the changes take effect at the next restart. If the |
1176 |
instance is running, there is no effect on the instance. |
1177 |
</para> |
1178 |
</refsect3> |
1179 |
|
1180 |
<refsect3> |
1181 |
<title>REINSTALL</title> |
1182 |
|
1183 |
<cmdsynopsis> |
1184 |
<command>reinstall</command> |
1185 |
<arg choice="opt">-o <replaceable>os-type</replaceable></arg> |
1186 |
<arg choice="opt">-f <replaceable>force</replaceable></arg> |
1187 |
<arg>--select-os</arg> |
1188 |
<arg>--submit</arg> |
1189 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1190 |
</cmdsynopsis> |
1191 |
|
1192 |
<para> |
1193 |
Reinstalls the operating system on the given instance. The instance |
1194 |
must be stopped when running this command. If the |
1195 |
<option>--os-type</option> is specified, the operating system is |
1196 |
changed. |
1197 |
</para> |
1198 |
|
1199 |
<para> |
1200 |
The <option>--select-os</option> option switches to an |
1201 |
interactive OS reinstall. The user is prompted to select the OS |
1202 |
template from the list of available OS templates. |
1203 |
</para> |
1204 |
|
1205 |
<para> |
1206 |
The <option>--submit</option> option is used to send the job to |
1207 |
the master daemon but not wait for its completion. The job |
1208 |
ID will be shown so that it can be examined via |
1209 |
<command>gnt-job info</command>. |
1210 |
</para> |
1211 |
|
1212 |
|
1213 |
</refsect3> |
1214 |
|
1215 |
<refsect3> |
1216 |
<title>RENAME</title> |
1217 |
|
1218 |
<cmdsynopsis> |
1219 |
<command>rename</command> |
1220 |
<arg>--no-ip-check</arg> |
1221 |
<arg>--submit</arg> |
1222 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1223 |
<arg choice="req"><replaceable>new_name</replaceable></arg> |
1224 |
</cmdsynopsis> |
1225 |
|
1226 |
<para> |
1227 |
Renames the given instance. The instance must be stopped |
1228 |
when running this command. The requirements for the new name |
1229 |
are the same as for adding an instance: the new name must be |
1230 |
resolvable and the IP it resolves to must not be reachable |
1231 |
(in order to prevent duplicate IPs the next time the |
1232 |
instance is started). The IP test can be skipped if the |
1233 |
<option>--no-ip-check</option> option is passed. |
1234 |
</para> |
1235 |
|
1236 |
<para> |
1237 |
The <option>--submit</option> option is used to send the job to |
1238 |
the master daemon but not wait for its completion. The job |
1239 |
ID will be shown so that it can be examined via |
1240 |
<command>gnt-job info</command>. |
1241 |
</para> |
1242 |
|
1243 |
</refsect3> |
1244 |
|
1245 |
</refsect2> |
1246 |
|
1247 |
<refsect2> |
1248 |
<title>Starting/stopping/connecting to console</title> |
1249 |
|
1250 |
<refsect3> |
1251 |
<title>STARTUP</title> |
1252 |
|
1253 |
<cmdsynopsis> |
1254 |
<command>startup</command> |
1255 |
<sbr> |
1256 |
<arg>--extra=<replaceable>PARAMS</replaceable></arg> |
1257 |
<arg>--force</arg> |
1258 |
<sbr> |
1259 |
<arg>--force-multiple</arg> |
1260 |
<sbr> |
1261 |
<group choice="opt"> |
1262 |
<arg>--instance</arg> |
1263 |
<arg>--node</arg> |
1264 |
<arg>--primary</arg> |
1265 |
<arg>--secondary</arg> |
1266 |
<arg>--all</arg> |
1267 |
</group> |
1268 |
<sbr> |
1269 |
<arg>--submit</arg> |
1270 |
<sbr> |
1271 |
<arg choice="opt" |
1272 |
rep="repeat"><replaceable>name</replaceable></arg> |
1273 |
</cmdsynopsis> |
1274 |
|
1275 |
<para> |
1276 |
Starts one or more instances, depending on the following |
1277 |
options. The four available modes are: |
1278 |
<variablelist> |
1279 |
<varlistentry> |
1280 |
<term><option>--instance</option></term> |
1281 |
<listitem> |
1282 |
<simpara>will start the instances given as arguments |
1283 |
(at least one argument required); this is the default |
1284 |
selection</simpara> |
1285 |
</listitem> |
1286 |
</varlistentry> |
1287 |
<varlistentry> |
1288 |
<term>--node</term> |
1289 |
<listitem> |
1290 |
<simpara>will start the instances who have the given |
1291 |
node as either primary or secondary</simpara> |
1292 |
</listitem> |
1293 |
</varlistentry> |
1294 |
<varlistentry> |
1295 |
<term><option>--primary</option></term> |
1296 |
<listitem> |
1297 |
<simpara>will start all instances whose primary node |
1298 |
is in the list of nodes passed as arguments (at least |
1299 |
one node required)</simpara> |
1300 |
</listitem> |
1301 |
</varlistentry> |
1302 |
<varlistentry> |
1303 |
<term><option>--secondary</option></term> |
1304 |
<listitem> |
1305 |
<simpara>will start all instances whose secondary node |
1306 |
is in the list of nodes passed as arguments (at least |
1307 |
one node required)</simpara> |
1308 |
</listitem> |
1309 |
</varlistentry> |
1310 |
<varlistentry> |
1311 |
<term>--all</term> |
1312 |
<listitem> |
1313 |
<simpara>will start all instances in the cluster (no |
1314 |
arguments accepted)</simpara> |
1315 |
</listitem> |
1316 |
</varlistentry> |
1317 |
</variablelist> |
1318 |
</para> |
1319 |
|
1320 |
<para> |
1321 |
Note that although you can pass more than one selection |
1322 |
option, the last one wins, so in order to guarantee the |
1323 |
desired result, don't pass more than one such option. |
1324 |
</para> |
1325 |
|
1326 |
<para> |
1327 |
The <option>--extra</option> option is used to pass |
1328 |
additional argument to the instance's kernel for this start |
1329 |
only. Currently there is no way to specify a persistent set |
1330 |
of arguments (beside the one hardcoded). Note that this may |
1331 |
not apply to all virtualization types. |
1332 |
</para> |
1333 |
|
1334 |
<para> |
1335 |
Use <option>--force</option> to start even if secondary disks are |
1336 |
failing. |
1337 |
</para> |
1338 |
|
1339 |
<para> |
1340 |
The <option>--force-multiple</option> will skip the |
1341 |
interactive confirmation in the case the more than one |
1342 |
instance will be affected. |
1343 |
</para> |
1344 |
|
1345 |
<para> |
1346 |
The <option>--submit</option> option is used to send the job to |
1347 |
the master daemon but not wait for its completion. The job |
1348 |
ID will be shown so that it can be examined via |
1349 |
<command>gnt-job info</command>. |
1350 |
</para> |
1351 |
|
1352 |
<para> |
1353 |
Example: |
1354 |
<screen> |
1355 |
# gnt-instance start instance1.example.com |
1356 |
# gnt-instance start --extra single test1.example.com |
1357 |
# gnt-instance start --node node1.example.com node2.example.com |
1358 |
# gnt-instance start --all |
1359 |
</screen> |
1360 |
</para> |
1361 |
</refsect3> |
1362 |
|
1363 |
<refsect3> |
1364 |
<title>SHUTDOWN</title> |
1365 |
|
1366 |
<cmdsynopsis> |
1367 |
<command>shutdown</command> |
1368 |
<sbr> |
1369 |
<arg>--force-multiple</arg> |
1370 |
<sbr> |
1371 |
<group choice="opt"> |
1372 |
<arg>--instance</arg> |
1373 |
<arg>--node</arg> |
1374 |
<arg>--primary</arg> |
1375 |
<arg>--secondary</arg> |
1376 |
<arg>--all</arg> |
1377 |
</group> |
1378 |
<sbr> |
1379 |
<arg>--submit</arg> |
1380 |
<sbr> |
1381 |
<arg choice="opt" |
1382 |
rep="repeat"><replaceable>name</replaceable></arg> |
1383 |
</cmdsynopsis> |
1384 |
|
1385 |
<para> |
1386 |
Stops one or more instances. If the instance cannot be |
1387 |
cleanly stopped during a hardcoded interval (currently 2 |
1388 |
minutes), it will forcibly stop the instance (equivalent to |
1389 |
switching off the power on a physical machine). |
1390 |
</para> |
1391 |
|
1392 |
<para> |
1393 |
The <option>--instance</option>, <option>--node</option>, |
1394 |
<option>--primary</option>, <option>--secondary</option> and |
1395 |
<option>--all</option> options are similar as for the |
1396 |
<command>startup</command> command and they influence the |
1397 |
actual instances being shutdown. |
1398 |
</para> |
1399 |
|
1400 |
<para> |
1401 |
The <option>--submit</option> option is used to send the job to |
1402 |
the master daemon but not wait for its completion. The job |
1403 |
ID will be shown so that it can be examined via |
1404 |
<command>gnt-job info</command>. |
1405 |
</para> |
1406 |
|
1407 |
|
1408 |
<para> |
1409 |
Example: |
1410 |
<screen> |
1411 |
# gnt-instance shutdown instance1.example.com |
1412 |
# gnt-instance shutdown --all |
1413 |
</screen> |
1414 |
</para> |
1415 |
</refsect3> |
1416 |
|
1417 |
<refsect3> |
1418 |
<title>REBOOT</title> |
1419 |
|
1420 |
<cmdsynopsis> |
1421 |
<command>reboot</command> |
1422 |
<sbr> |
1423 |
<arg>--extra=<replaceable>PARAMS</replaceable></arg> |
1424 |
<sbr> |
1425 |
<arg>--type=<replaceable>REBOOT-TYPE</replaceable></arg> |
1426 |
<sbr> |
1427 |
<arg>--ignore-secondaries</arg> |
1428 |
<sbr> |
1429 |
<arg>--force-multiple</arg> |
1430 |
<sbr> |
1431 |
<group choice="opt"> |
1432 |
<arg>--instance</arg> |
1433 |
<arg>--node</arg> |
1434 |
<arg>--primary</arg> |
1435 |
<arg>--secondary</arg> |
1436 |
<arg>--all</arg> |
1437 |
</group> |
1438 |
<sbr> |
1439 |
<arg>--submit</arg> |
1440 |
<sbr> |
1441 |
<arg choice="opt" |
1442 |
rep="repeat"><replaceable>name</replaceable></arg> |
1443 |
</cmdsynopsis> |
1444 |
|
1445 |
<para> |
1446 |
Reboots one or more instances. The type of reboot depends on |
1447 |
the value of <option>--type</option>. A soft reboot does a |
1448 |
hypervisor reboot, a hard reboot does a instance stop, |
1449 |
recreates the hypervisor config for the instance and |
1450 |
starts the instance. A full reboot does the equivalent |
1451 |
of <command>gnt-instance shutdown && gnt-instance |
1452 |
startup</command>. The default is hard reboot. |
1453 |
</para> |
1454 |
|
1455 |
<para> |
1456 |
For the hard reboot the option |
1457 |
<option>--ignore-secondaries</option> ignores errors for the |
1458 |
secondary node while re-assembling the instance disks. |
1459 |
</para> |
1460 |
|
1461 |
<para> |
1462 |
The <option>--instance</option>, <option>--node</option>, |
1463 |
<option>--primary</option>, <option>--secondary</option> and |
1464 |
<option>--all</option> options are similar as for the |
1465 |
<command>startup</command> command and they influence the |
1466 |
actual instances being rebooted. |
1467 |
</para> |
1468 |
|
1469 |
<para> |
1470 |
The <option>--force-multiple</option> will skip the |
1471 |
interactive confirmation in the case the more than one |
1472 |
instance will be affected. |
1473 |
</para> |
1474 |
|
1475 |
<para> |
1476 |
Example: |
1477 |
<screen> |
1478 |
# gnt-instance reboot instance1.example.com |
1479 |
# gnt-instance reboot --type=full instance1.example.com |
1480 |
</screen> |
1481 |
</para> |
1482 |
</refsect3> |
1483 |
|
1484 |
<refsect3> |
1485 |
<title>CONSOLE</title> |
1486 |
<cmdsynopsis> |
1487 |
<command>console</command> |
1488 |
<arg choice="opt">--show-cmd</arg> |
1489 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1490 |
</cmdsynopsis> |
1491 |
|
1492 |
<para> |
1493 |
Connects to the console of the given instance. If the |
1494 |
instance is not up, an error is returned. Use the |
1495 |
<option>--show-cmd</option> option to display the command |
1496 |
instead of executing it. |
1497 |
</para> |
1498 |
|
1499 |
<para> |
1500 |
For HVM instances, this will attempt to connect to the |
1501 |
serial console of the instance. To connect to the |
1502 |
virtualized "physical" console of a HVM instance, use a VNC |
1503 |
client with the connection info from the |
1504 |
<command>info</command> command. |
1505 |
</para> |
1506 |
|
1507 |
<para> |
1508 |
Example: |
1509 |
<screen> |
1510 |
# gnt-instance console instance1.example.com |
1511 |
</screen> |
1512 |
</para> |
1513 |
</refsect3> |
1514 |
|
1515 |
</refsect2> |
1516 |
|
1517 |
<refsect2> |
1518 |
<title>Disk management</title> |
1519 |
|
1520 |
<refsect3> |
1521 |
<title>REPLACE-DISKS</title> |
1522 |
|
1523 |
<cmdsynopsis> |
1524 |
<command>replace-disks</command> |
1525 |
<arg>--submit</arg> |
1526 |
<arg choice="req">-p</arg> |
1527 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1528 |
</cmdsynopsis> |
1529 |
|
1530 |
<cmdsynopsis> |
1531 |
<command>replace-disks</command> |
1532 |
<arg>--submit</arg> |
1533 |
<arg choice="req">-s</arg> |
1534 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1535 |
</cmdsynopsis> |
1536 |
|
1537 |
<cmdsynopsis> |
1538 |
<command>replace-disks</command> |
1539 |
<arg>--submit</arg> |
1540 |
<group choice="req"> |
1541 |
<arg>--iallocator <replaceable>name</replaceable></arg> |
1542 |
<arg>--new-secondary <replaceable>NODE</replaceable></arg> |
1543 |
</group> |
1544 |
|
1545 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1546 |
</cmdsynopsis> |
1547 |
|
1548 |
<para> |
1549 |
This command is a generalized form for adding and replacing |
1550 |
disks. It is currently only valid for the mirrored (DRBD) |
1551 |
disk template. |
1552 |
</para> |
1553 |
|
1554 |
<para> |
1555 |
The first form (when passing the <option>-p</option> option) |
1556 |
will replace the disks on the primary, while the second form |
1557 |
(when passing the <option>-s</option> option will replace |
1558 |
the disks on the secondary node. |
1559 |
</para> |
1560 |
|
1561 |
<para> |
1562 |
The third form (when passing either the |
1563 |
<option>--iallocator</option> or the |
1564 |
<option>--new-secondary</option> option) is designed to |
1565 |
change secondary node of the instance. Specifying |
1566 |
<option>--iallocator</option> makes the new secondary be |
1567 |
selected automatically by the specified allocator plugin, |
1568 |
otherwise the new secondary node will be the one chosen |
1569 |
manually via the <option>--new-secondary</option> option. |
1570 |
</para> |
1571 |
|
1572 |
<para> |
1573 |
The <option>--submit</option> option is used to send the job to |
1574 |
the master daemon but not wait for its completion. The job |
1575 |
ID will be shown so that it can be examined via |
1576 |
<command>gnt-job info</command>. |
1577 |
</para> |
1578 |
|
1579 |
<para> |
1580 |
Note that it is not possible to select an offline or drained |
1581 |
node as a new secondary. |
1582 |
</para> |
1583 |
|
1584 |
</refsect3> |
1585 |
|
1586 |
<refsect3> |
1587 |
<title>ACTIVATE-DISKS</title> |
1588 |
|
1589 |
<cmdsynopsis> |
1590 |
<command>activate-disks</command> |
1591 |
<arg>--submit</arg> |
1592 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1593 |
</cmdsynopsis> |
1594 |
<para> |
1595 |
Activates the block devices of the given instance. If |
1596 |
successful, the command will show the location and name of |
1597 |
the block devices: |
1598 |
<screen> |
1599 |
node1.example.com:disk/0:/dev/drbd0 |
1600 |
node1.example.com:disk/1:/dev/drbd1 |
1601 |
</screen> |
1602 |
|
1603 |
In this example, <emphasis>node1.example.com</emphasis> is |
1604 |
the name of the node on which the devices have been |
1605 |
activated. The <emphasis>disk/0</emphasis> and |
1606 |
<emphasis>disk/1</emphasis> are the Ganeti-names of the |
1607 |
instance disks; how they are visible inside the instance is |
1608 |
hypervisor-specific. <emphasis>/dev/drbd0</emphasis> and |
1609 |
<emphasis>/dev/drbd1</emphasis> are the actual block devices |
1610 |
as visible on the node. |
1611 |
</para> |
1612 |
|
1613 |
<para> |
1614 |
The <option>--submit</option> option is used to send the job to |
1615 |
the master daemon but not wait for its completion. The job |
1616 |
ID will be shown so that it can be examined via |
1617 |
<command>gnt-job info</command>. |
1618 |
</para> |
1619 |
|
1620 |
<para> |
1621 |
Note that it is safe to run this command while the instance |
1622 |
is already running. |
1623 |
</para> |
1624 |
</refsect3> |
1625 |
|
1626 |
<refsect3> |
1627 |
<title>DEACTIVATE-DISKS</title> |
1628 |
|
1629 |
<cmdsynopsis> |
1630 |
<command>deactivate-disks</command> |
1631 |
<arg>--submit</arg> |
1632 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1633 |
</cmdsynopsis> |
1634 |
<para> |
1635 |
De-activates the block devices of the given instance. Note |
1636 |
that if you run this command for an instance with a drbd |
1637 |
disk template, while it is running, it will not be able to |
1638 |
shutdown the block devices on the primary node, but it will |
1639 |
shutdown the block devices on the secondary nodes, thus |
1640 |
breaking the replication. |
1641 |
</para> |
1642 |
|
1643 |
<para> |
1644 |
The <option>--submit</option> option is used to send the job to |
1645 |
the master daemon but not wait for its completion. The job |
1646 |
ID will be shown so that it can be examined via |
1647 |
<command>gnt-job info</command>. |
1648 |
</para> |
1649 |
|
1650 |
</refsect3> |
1651 |
|
1652 |
<refsect3> |
1653 |
<title>GROW-DISK</title> |
1654 |
<cmdsynopsis> |
1655 |
<command>grow-disk</command> |
1656 |
<arg>--no-wait-for-sync</arg> |
1657 |
<arg>--submit</arg> |
1658 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1659 |
<arg choice="req"><replaceable>disk</replaceable></arg> |
1660 |
<arg choice="req"><replaceable>amount</replaceable></arg> |
1661 |
</cmdsynopsis> |
1662 |
|
1663 |
<para> |
1664 |
Grows an instance's disk. This is only possible for |
1665 |
instances having a <literal>plain</literal> or |
1666 |
<literal>drbd</literal> disk template. |
1667 |
</para> |
1668 |
|
1669 |
<para> |
1670 |
Note that this command only change the block device size; it |
1671 |
will not grow the actual filesystems, partitions, etc. that |
1672 |
live on that disk. Usually, you will need to: |
1673 |
<orderedlist> |
1674 |
<listitem> |
1675 |
<simpara>use <command>gnt-instance grow-disk</command></simpara> |
1676 |
</listitem> |
1677 |
<listitem> |
1678 |
<simpara>reboot the instance (later, at a convenient |
1679 |
time)</simpara> |
1680 |
</listitem> |
1681 |
<listitem> |
1682 |
<simpara>use a filesystem resizer, such as |
1683 |
<citerefentry> <refentrytitle>ext2online</refentrytitle> |
1684 |
<manvolnum>8</manvolnum> </citerefentry> or |
1685 |
<citerefentry> <refentrytitle>xfs_growfs</refentrytitle> |
1686 |
<manvolnum>8</manvolnum> </citerefentry> to resize the |
1687 |
filesystem, or use <citerefentry> |
1688 |
<refentrytitle>fdisk</refentrytitle> |
1689 |
<manvolnum>8</manvolnum> </citerefentry> to change the |
1690 |
partition table on the disk |
1691 |
</simpara> |
1692 |
</listitem> |
1693 |
</orderedlist> |
1694 |
</para> |
1695 |
|
1696 |
|
1697 |
<para> |
1698 |
The <replaceable>disk</replaceable> argument is the index of |
1699 |
the instance disk to grow. The |
1700 |
<replaceable>amount</replaceable> argument is given either |
1701 |
as a number (and it represents the amount to increase the |
1702 |
disk with in mebibytes) or can be given similar to the |
1703 |
arguments in the create instance operation, with a suffix |
1704 |
denoting the unit. |
1705 |
</para> |
1706 |
|
1707 |
<para> |
1708 |
Note that the disk grow operation might complete on one node |
1709 |
but fail on the other; this will leave the instance with |
1710 |
different-sized LVs on the two nodes, but this will not |
1711 |
create problems (except for unused space). |
1712 |
</para> |
1713 |
|
1714 |
<para> |
1715 |
If you do not want gnt-instance to wait for the new disk |
1716 |
region to be synced, use the |
1717 |
<option>--no-wait-for-sync</option> option. |
1718 |
</para> |
1719 |
|
1720 |
<para> |
1721 |
The <option>--submit</option> option is used to send the job to |
1722 |
the master daemon but not wait for its completion. The job |
1723 |
ID will be shown so that it can be examined via |
1724 |
<command>gnt-job info</command>. |
1725 |
</para> |
1726 |
|
1727 |
|
1728 |
<para>Example (increase the first disk for instance1 by 16GiB): |
1729 |
<screen> |
1730 |
# gnt-instance grow-disk instance1.example.com 0 16g |
1731 |
</screen> |
1732 |
</para> |
1733 |
|
1734 |
<para> |
1735 |
Also note that disk shrinking is not supported; use |
1736 |
<command>gnt-backup export</command> and then |
1737 |
<command>gnt-backup import</command> to reduce the disk size |
1738 |
of an instance. |
1739 |
</para> |
1740 |
</refsect3> |
1741 |
|
1742 |
</refsect2> |
1743 |
|
1744 |
<refsect2> |
1745 |
<title>Recovery</title> |
1746 |
|
1747 |
<refsect3> |
1748 |
<title>FAILOVER</title> |
1749 |
|
1750 |
<cmdsynopsis> |
1751 |
<command>failover</command> |
1752 |
<arg>-f</arg> |
1753 |
<arg>--ignore-consistency</arg> |
1754 |
<arg>--submit</arg> |
1755 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1756 |
</cmdsynopsis> |
1757 |
|
1758 |
<para> |
1759 |
Failover will fail the instance over its secondary |
1760 |
node. This works only for instances having a drbd disk |
1761 |
template. |
1762 |
</para> |
1763 |
|
1764 |
<para> |
1765 |
Normally the failover will check the consistency of the |
1766 |
disks before failing over the instance. If you are trying to |
1767 |
migrate instances off a dead node, this will fail. Use the |
1768 |
<option>--ignore-consistency</option> option for this |
1769 |
purpose. Note that this option can be dangerous as errors in |
1770 |
shutting down the instance will be ignored, resulting in |
1771 |
possibly having the instance running on two machines in |
1772 |
parallel (on disconnected DRBD drives). |
1773 |
</para> |
1774 |
|
1775 |
<para> |
1776 |
The <option>--submit</option> option is used to send the job to |
1777 |
the master daemon but not wait for its completion. The job |
1778 |
ID will be shown so that it can be examined via |
1779 |
<command>gnt-job info</command>. |
1780 |
</para> |
1781 |
|
1782 |
<para> |
1783 |
Example: |
1784 |
<screen> |
1785 |
# gnt-instance failover instance1.example.com |
1786 |
</screen> |
1787 |
</para> |
1788 |
</refsect3> |
1789 |
|
1790 |
<refsect3> |
1791 |
<title>MIGRATE</title> |
1792 |
|
1793 |
<cmdsynopsis> |
1794 |
<command>migrate</command> |
1795 |
<arg>-f</arg> |
1796 |
<arg choice="req">--cleanup</arg> |
1797 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1798 |
</cmdsynopsis> |
1799 |
|
1800 |
<cmdsynopsis> |
1801 |
<command>migrate</command> |
1802 |
<arg>-f</arg> |
1803 |
<arg>--non-live</arg> |
1804 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
1805 |
</cmdsynopsis> |
1806 |
|
1807 |
<para> |
1808 |
Migrate will move the instance to its secondary node without |
1809 |
shutdown. It only works for instances having the drbd8 disk |
1810 |
template type. |
1811 |
</para> |
1812 |
|
1813 |
<para> |
1814 |
The migration command needs a perfectly healthy instance, as |
1815 |
we rely on the dual-master capability of drbd8 and the disks |
1816 |
of the instance are not allowed to be degraded. |
1817 |
</para> |
1818 |
|
1819 |
<para> |
1820 |
The <option>--non-live</option> option will switch (for the |
1821 |
hypervisors that support it) between a "fully live" |
1822 |
(i.e. the interruption is as minimal as possible) migration |
1823 |
and one in which the instance is frozen, its state saved and |
1824 |
transported to the remote node, and then resumed there. This |
1825 |
all depends on the hypervisor support for two different |
1826 |
methods. In any case, it is not an error to pass this |
1827 |
parameter (it will just be ignored if the hypervisor doesn't |
1828 |
support it). |
1829 |
</para> |
1830 |
|
1831 |
<para> |
1832 |
If the <option>--cleanup</option> option is passed, the |
1833 |
operation changes from migration to attempting recovery from |
1834 |
a failed previous migration. In this mode, ganeti checks if |
1835 |
the instance runs on the correct node (and updates its |
1836 |
configuration if not) and ensures the instances's disks are |
1837 |
configured correctly. In this mode, the |
1838 |
<option>--non-live</option> option is ignored. |
1839 |
</para> |
1840 |
|
1841 |
<para> |
1842 |
The option <option>-f</option> will skip the prompting for |
1843 |
confirmation. |
1844 |
</para> |
1845 |
<para> |
1846 |
Example (and expected output): |
1847 |
<screen> |
1848 |
# gnt-instance migrate instance1 |
1849 |
Migrate will happen to the instance instance1. Note that migration is |
1850 |
**experimental** in this version. This might impact the instance if |
1851 |
anything goes wrong. Continue? |
1852 |
y/[n]/?: y |
1853 |
* checking disk consistency between source and target |
1854 |
* ensuring the target is in secondary mode |
1855 |
* changing disks into dual-master mode |
1856 |
- INFO: Waiting for instance instance1 to sync disks. |
1857 |
- INFO: Instance instance1's disks are in sync. |
1858 |
* migrating instance to node2.example.com |
1859 |
* changing the instance's disks on source node to secondary |
1860 |
- INFO: Waiting for instance instance1 to sync disks. |
1861 |
- INFO: Instance instance1's disks are in sync. |
1862 |
* changing the instance's disks to single-master |
1863 |
# |
1864 |
</screen> |
1865 |
</para> |
1866 |
</refsect3> |
1867 |
|
1868 |
</refsect2> |
1869 |
|
1870 |
<refsect2> |
1871 |
<title>TAGS</title> |
1872 |
|
1873 |
<refsect3> |
1874 |
<title>ADD-TAGS</title> |
1875 |
|
1876 |
<cmdsynopsis> |
1877 |
<command>add-tags</command> |
1878 |
<arg choice="opt">--from <replaceable>file</replaceable></arg> |
1879 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
1880 |
<arg choice="req" |
1881 |
rep="repeat"><replaceable>tag</replaceable></arg> |
1882 |
</cmdsynopsis> |
1883 |
|
1884 |
<para> |
1885 |
Add tags to the given instance. If any of the tags contains |
1886 |
invalid characters, the entire operation will abort. |
1887 |
</para> |
1888 |
<para> |
1889 |
If the <option>--from</option> option is given, the list of |
1890 |
tags will be extended with the contents of that file (each |
1891 |
line becomes a tag). In this case, there is not need to pass |
1892 |
tags on the command line (if you do, both sources will be |
1893 |
used). A file name of - will be interpreted as stdin. |
1894 |
</para> |
1895 |
</refsect3> |
1896 |
|
1897 |
<refsect3> |
1898 |
<title>LIST-TAGS</title> |
1899 |
|
1900 |
<cmdsynopsis> |
1901 |
<command>list-tags</command> |
1902 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
1903 |
</cmdsynopsis> |
1904 |
|
1905 |
<para>List the tags of the given instance.</para> |
1906 |
</refsect3> |
1907 |
|
1908 |
<refsect3> |
1909 |
<title>REMOVE-TAGS</title> |
1910 |
<cmdsynopsis> |
1911 |
<command>remove-tags</command> |
1912 |
<arg choice="opt">--from <replaceable>file</replaceable></arg> |
1913 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
1914 |
<arg choice="req" |
1915 |
rep="repeat"><replaceable>tag</replaceable></arg> |
1916 |
</cmdsynopsis> |
1917 |
|
1918 |
<para> |
1919 |
Remove tags from the given instance. If any of the tags are |
1920 |
not existing on the node, the entire operation will abort. |
1921 |
</para> |
1922 |
|
1923 |
<para> |
1924 |
If the <option>--from</option> option is given, the list of |
1925 |
tags will be extended with the contents of that file (each |
1926 |
line becomes a tag). In this case, there is not need to pass |
1927 |
tags on the command line (if you do, both sources will be |
1928 |
used). A file name of - will be interpreted as stdin. |
1929 |
</para> |
1930 |
</refsect3> |
1931 |
|
1932 |
</refsect2> |
1933 |
|
1934 |
</refsect1> |
1935 |
|
1936 |
&footer; |
1937 |
|
1938 |
</refentry> |
1939 |
|
1940 |
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1941 |
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