75 lines
4.0 KiB
XML
75 lines
4.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<section xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
|
|
xml:id="nova_cli_stop_start">
|
|
<title>Stop and start an instance</title>
|
|
<para>Use one of the following methods to stop and start an
|
|
instance.</para>
|
|
<section xml:id="pause_server">
|
|
<title>Pause and unpause an instance</title>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>To pause an instance, run the following command:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova pause <replaceable>INSTANCE_NAME</replaceable></userinput> </screen>
|
|
<para>This command stores the state of the VM in RAM. A paused
|
|
instance continues to run in a frozen state.</para></listitem>
|
|
<listitem><para>To unpause the instance, run the following command:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova unpause <replaceable>INSTANCE_NAME</replaceable></userinput> </screen>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section xml:id="suspend_resume">
|
|
<title>Suspend and resume an instance</title>
|
|
<itemizedlist>
|
|
<para>Administrative users might want to suspend an instance if
|
|
it is infrequently used or to perform system maintenance. When
|
|
you suspend an instance, its VM state is stored on disk, all
|
|
memory is written to disk, and the virtual machine is stopped.
|
|
Suspending an instance is similar to placing a device in
|
|
hibernation; memory and vCPUs become available to create other
|
|
instances.</para>
|
|
<listitem>
|
|
<para>To initiate a hypervisor-level suspend operation, run
|
|
the following command:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova suspend <replaceable>INSTANCE_NAME</replaceable></userinput></screen>
|
|
</listitem>
|
|
<listitem>
|
|
<para>To resume a suspended instance, run the following
|
|
command:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova resume <replaceable>INSTANCE_NAME</replaceable></userinput></screen>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section xml:id="shelve_server">
|
|
<title>Shelve and unshelve an instance</title>
|
|
<para>Shelving is useful if you have an instance that you are not using, but would like retain in
|
|
your list of servers. For example, you can stop an instance at the end of a work week, and
|
|
resume work again at the start of the next week. All associated data and resources are kept;
|
|
however, anything still in memory is not retained. If a shelved instance is no longer needed,
|
|
it can also be entirely removed.</para>
|
|
<para>You can complete the following shelving tasks:</para>
|
|
<variablelist>
|
|
<varlistentry><term>Shelve an instance</term>
|
|
<listitem><para>Shuts down the instance, and stores it together with associated data and resources (a snapshot
|
|
is taken if not volume backed). Anything in memory is lost. Use the following
|
|
command:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova shelve <replaceable>SERVERNAME</replaceable></userinput></screen>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry><term>Unshelve an instance</term>
|
|
<listitem><para>Restores the instance:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova unshelve <replaceable>SERVERNAME</replaceable></userinput></screen>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry><term>Remove a shelved instance</term>
|
|
<listitem><para>Removes the instance from the server; data and resource associations are deleted. If an
|
|
instance is no longer needed, you can move that instance off the hypervisor in order to
|
|
minimize resource usage:</para>
|
|
<screen><prompt>$</prompt> <userinput>nova shelve-offload <replaceable>SERVERNAME</replaceable></userinput></screen>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</section>
|
|
</section>
|