69b79de7b9
Partial-Bug: #1250515 author: diane fleming Change-Id: I0ae7f3da1ef0bf9af4900097d527e2cd7b94c966 backport: havana
63 lines
2.8 KiB
XML
63 lines
2.8 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
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xml:id="specify-host-to-boot-instances-on">
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<title>Select hosts where instances are launched</title>
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<para>With the appropriate permissions, you can select on which
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host instances are launched and which roles can boot instances
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on this host.</para>
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<procedure>
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<step>
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<para>To select the host where instances are launched, use
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the <literal>--availability_zone
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<replaceable>zone</replaceable>:<replaceable>host</replaceable></literal>
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parameter on the <command>nova boot</command> command, </para>
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<para>For example:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --image <uuid> --flavor m1.tiny --key_name test --availability-zone nova:server2</userinput></screen>
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</step>
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<step>
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<para>To specify which roles can launch an instance on a
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specified host, enable the
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<literal>create:forced_host</literal> option in
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the <filename>policy.json</filename> file. By default,
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this option is enabled for only the admin role.</para>
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</step>
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<step>
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<para>To view the list of valid compute hosts, use the
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<command>nova hypervisor-list</command> command,
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as follows:</para>
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<screen><prompt>$</prompt> <userinput>nova hypervisor-list</userinput>
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<computeroutput>+----+---------------------+
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| ID | Hypervisor hostname |
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+----+---------------------+
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| 1 | server2 |
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| 2 | server3 |
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| 3 | server4 |
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+----+---------------------+</computeroutput></screen>
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</step>
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</procedure>
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<note>
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<para>
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<itemizedlist>
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<listitem>
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<para>Beginning in the Folsom release, the
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<literal>--availability_zone
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<replaceable>zone</replaceable>:<replaceable>host</replaceable></literal>
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parameter replaces the
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<literal>--force_hosts</literal> scheduler
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hint parameter.</para>
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</listitem>
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<listitem>
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<para>Beginning in the Grizzly release, you can
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enable the
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<literal>create:forced_host</literal>
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option in the <filename>policy.json</filename>
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file to specify which roles can launch an
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instance on a specified host.</para>
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</listitem>
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</itemizedlist>
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</para>
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</note>
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</section>
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