2ce3d3aea0
- Breaking up https://review.openstack.org/#/c/89581/ - cli_nova_manage_instances and associated files Change-Id: I301ea42b29690a67859e3ac600817792ca76afcf
116 lines
7.1 KiB
XML
116 lines
7.1 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0" xml:id="usage_statistics">
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<title>Show usage statistics for hosts and instances</title><para xlink:href="http://graphite.wikidot.com">You can show basic
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statistics on resource usage for hosts and instances.</para>
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<note>
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<para xlink:href="http://graphite.wikidot.com">For more sophisticated
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monitoring, see the <link
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xlink:href="https://launchpad.net/ceilometer"
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>Ceilometer</link> project, which is under
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development. You can also use tools, such as <link
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xlink:href="http://ganglia.info/">Ganglia</link> or
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<link xlink:href="http://graphite.wikidot.com/"
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>Graphite</link>, to gather more detailed data.</para>
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</note>
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<section xml:id="host_usage_statistics">
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<title>Show host usage statistics</title>
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<para>The following examples show the host usage statistics for a host
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called <filename>devstack</filename>.</para>
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<itemizedlist>
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<listitem>
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<para>List the hosts and the nova-related services that run on
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them:</para><screen><prompt>$</prompt> <userinput>nova host-list</userinput>
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<computeroutput>+-----------+-------------+----------+
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| host_name | service | zone |
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+-----------+-------------+----------+
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| devstack | conductor | internal |
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| devstack | compute | nova |
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| devstack | cert | internal |
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| devstack | network | internal |
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| devstack | scheduler | internal |
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| devstack | consoleauth | internal |
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+-----------+-------------+----------+</computeroutput></screen></listitem>
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<listitem><para>Get a summary of resource usage of all of the instances running on
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the host:</para>
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<screen><prompt>$</prompt> <userinput>nova host-describe devstack</userinput>
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<computeroutput>+-----------+----------------------------------+-----+-----------+---------+
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| HOST | PROJECT | cpu | memory_mb | disk_gb |
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+----------+----------------------------------+-----+-----------+---------+
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| devstack | (total) | 2 | 4003 | 157 |
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| devstack | (used_now) | 3 | 5120 | 40 |
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| devstack | (used_max) | 3 | 4608 | 40 |
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| devstack | b70d90d65e464582b6b2161cf3603ced | 1 | 512 | 0 |
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| devstack | 66265572db174a7aa66eba661f58eb9e | 2 | 4096 | 40 |
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+----------+----------------------------------+-----+-----------+---------+</computeroutput></screen>
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<para>The <literal>cpu</literal> column shows the sum of
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the virtual CPUs for instances running on the host.</para>
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<para>The <literal>memory_mb</literal> column shows the sum of the
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memory (in MB) allocated to the instances that run on the
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host.</para>
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<para>The <literal>disk_gb</literal> column shows the sum of the
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root and ephemeral disk sizes (in GB) of the instances that
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run on the host.</para>
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<para>The row that has the value <literal>used_now</literal> in the
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<literal>PROJECT</literal> column shows the sum of the
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resources allocated to the instances that run on the host,
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plus the resources allocated to the virtual machine of the
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host itself.</para>
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<para>The row that has the value <literal>used_max</literal> row in
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the <literal>PROJECT</literal> column shows the sum of the
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resources allocated to the instances that run on the
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host.</para></listitem>
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</itemizedlist>
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<note>
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<para>These values are computed by using information about the flavors of the
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instances that run on the hosts. This command does not query the
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CPU usage, memory usage, or hard disk usage of the physical
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host.</para>
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</note>
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</section>
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<section xml:id="instance_usage_statistics">
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<title>Show instance usage statistics</title>
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<itemizedlist>
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<listitem><para>Get CPU, memory, I/O, and network statistics for an
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instance.</para>
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<orderedlist><listitem><para>List instances:</para>
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<screen><prompt>$</prompt> <userinput>nova list</userinput>
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<computeroutput>+--------------------------------------+----------------------+--------+------------+-------------+------------------+
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| ID | Name | Status | Task State | Power State | Networks |
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+--------------------------------------+----------------------+--------+------------+-------------+------------------+
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| 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 | myCirrosServer | ACTIVE | None | Running | private=10.0.0.3 |
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| 8a99547e-7385-4ad1-ae50-4ecfaaad5f42 | myInstanceFromVolume | ACTIVE | None | Running | private=10.0.0.4 |
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+--------------------------------------+----------------------+--------+------------+-------------+------------------+</computeroutput></screen></listitem>
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<listitem><para>Get diagnostic statistics:</para>
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<screen><prompt>$</prompt> <userinput>nova diagnostics myCirrosServer</userinput>
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<computeroutput>+------------------+----------------+
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| Property | Value |
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+------------------+----------------+
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| vnet1_rx | 1210744 |
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| cpu0_time | 19624610000000 |
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| vda_read | 0 |
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| vda_write | 0 |
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| vda_write_req | 0 |
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| vnet1_tx | 863734 |
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| vnet1_tx_errors | 0 |
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| vnet1_rx_drop | 0 |
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| vnet1_tx_packets | 3855 |
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| vnet1_tx_drop | 0 |
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| vnet1_rx_errors | 0 |
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| memory | 2097152 |
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| vnet1_rx_packets | 5485 |
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| vda_read_req | 0 |
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| vda_errors | -1 |
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+------------------+----------------+</computeroutput></screen></listitem></orderedlist></listitem>
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<listitem><para>Get summary statistics for each tenant:</para>
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<screen><prompt>$</prompt> <userinput>nova usage-list</userinput>
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<computeroutput>Usage from 2013-06-25 to 2013-07-24:
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+----------------------------------+-----------+--------------+-----------+---------------+
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| Tenant ID | Instances | RAM MB-Hours | CPU Hours | Disk GB-Hours |
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+----------------------------------+-----------+--------------+-----------+---------------+
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| b70d90d65e464582b6b2161cf3603ced | 1 | 344064.44 | 672.00 | 0.00 |
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| 66265572db174a7aa66eba661f58eb9e | 3 | 671626.76 | 327.94 | 6558.86 |
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+----------------------------------+-----------+--------------+-----------+---------------+</computeroutput></screen></listitem></itemizedlist>
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</section>
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</section>
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