84 lines
4.5 KiB
XML
84 lines
4.5 KiB
XML
<?xml version='1.0' encoding='UTF-8'?>
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<para xmlns="http://docbook.org/ns/docbook" version="5.0">
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<!--
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###################################################################
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WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
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###################################################################
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Warning: Do not edit this file. It is automatically
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generated from the software project's code and your changes
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will be overwritten.
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The tool to generate this file lives in openstack-doc-tools
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repository.
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Please make any changes needed in the code, then run the
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autogenerate-config-doc tool from the openstack-doc-tools
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repository, or ask for help on the documentation mailing list,
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IRC channel or meeting.
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###################################################################
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WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
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###################################################################
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-->
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<table rules="all" xml:id="config_table_nova_livemigration">
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<caption>Description of live migration configuration options</caption>
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<col width="50%"/>
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<col width="50%"/>
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<thead>
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<tr>
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<th>Configuration option = Default value</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<th colspan="2">[DEFAULT]</th>
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</tr>
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<tr>
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<td><option>live_migration_retry_count</option> = <replaceable>30</replaceable></td>
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<td>(IntOpt) Number of 1 second retries needed in live_migration</td>
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</tr>
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<tr>
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<td><option>max_concurrent_live_migrations</option> = <replaceable>1</replaceable></td>
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<td>(IntOpt) Maximum number of live migrations to run concurrently. This limit is enforced to avoid outbound live migrations overwhelming the host/network and causing failures. It is not recommended that you change this unless you are very sure that doing so is safe and stable in your environment.</td>
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</tr>
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<tr>
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<th colspan="2">[libvirt]</th>
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</tr>
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<tr>
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<td><option>live_migration_bandwidth</option> = <replaceable>0</replaceable></td>
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<td>(IntOpt) Maximum bandwidth(in MiB/s) to be used during migration. If set to 0, will choose a suitable default. Some hypervisors do not support this feature and will return an error if bandwidth is not 0. Please refer to the libvirt documentation for further details</td>
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</tr>
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<tr>
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<td><option>live_migration_completion_timeout</option> = <replaceable>800</replaceable></td>
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<td>(IntOpt) Time to wait, in seconds, for migration to successfully complete transferring data before aborting the operation. Value is per GiB of guest RAM + disk to be transferred, with lower bound of a minimum of 2 GiB. Should usually be larger than downtime delay * downtime steps. Set to 0 to disable timeouts.</td>
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</tr>
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<tr>
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<td><option>live_migration_downtime</option> = <replaceable>500</replaceable></td>
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<td>(IntOpt) Maximum permitted downtime, in milliseconds, for live migration switchover. Will be rounded up to a minimum of 100ms. Use a large value if guest liveness is unimportant.</td>
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</tr>
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<tr>
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<td><option>live_migration_downtime_delay</option> = <replaceable>75</replaceable></td>
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<td>(IntOpt) Time to wait, in seconds, between each step increase of the migration downtime. Minimum delay is 10 seconds. Value is per GiB of guest RAM + disk to be transferred, with lower bound of a minimum of 2 GiB per device</td>
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</tr>
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<tr>
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<td><option>live_migration_downtime_steps</option> = <replaceable>10</replaceable></td>
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<td>(IntOpt) Number of incremental steps to reach max downtime value. Will be rounded up to a minimum of 3 steps</td>
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</tr>
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<tr>
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<td><option>live_migration_flag</option> = <replaceable>VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED</replaceable></td>
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<td>(StrOpt) Migration flags to be set for live migration</td>
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</tr>
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<tr>
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<td><option>live_migration_progress_timeout</option> = <replaceable>150</replaceable></td>
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<td>(IntOpt) Time to wait, in seconds, for migration to make forward progress in transferring data before aborting the operation. Set to 0 to disable timeouts.</td>
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</tr>
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<tr>
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<td><option>live_migration_uri</option> = <replaceable>qemu+tcp://%s/system</replaceable></td>
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<td>(StrOpt) Migration target URI (any included "%s" is replaced with the migration target hostname)</td>
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</tr>
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</tbody>
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</table>
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</para>
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