ccb80d725d
Updated a typo (keystone-mange -> keystone-manage) Updated a few capitalization errors in titles Change-Id: I38ec2a6c53b9e3a1e1bf330b54c26f293a764d94 author: diane fleming
108 lines
6.8 KiB
XML
108 lines
6.8 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> <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></note>
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<procedure xml:id="host_usage_statistics">
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<title>To show host usage statistics</title>
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<step><para>List the hosts and the nova-related services that run on
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them:</para><screen><prompt>$</prompt> <userinput>nova host-list</userinput>
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<computeroutput>+------------------+-------------+----------+
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| host_name | service | zone |
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+------------------+-------------+----------+
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| devstack-grizzly | conductor | internal |
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| devstack-grizzly | compute | nova |
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| devstack-grizzly | cert | internal |
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| devstack-grizzly | network | internal |
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| devstack-grizzly | scheduler | internal |
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| devstack-grizzly | consoleauth | internal |
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+------------------+-------------+----------+</computeroutput></screen>
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</step>
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<step><para>Get a summary of resource usage of all of the instances running
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on the host.</para>
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<screen><prompt>$</prompt> <userinput>nova host-describe <replaceable>devstack-grizzly</replaceable></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-grizzly | (total) | 2 | 4003 | 157 |
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| devstack-grizzly | (used_now) | 3 | 5120 | 40 |
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| devstack-grizzly | (used_max) | 3 | 4608 | 40 |
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| devstack-grizzly | b70d90d65e464582b6b2161cf3603ced | 1 | 512 | 0 |
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| devstack-grizzly | 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
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sum of the memory (in MB) allocated to the instances
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that run on the hosts.</para>
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<para>The <literal>disk_gb</literal> column shows the sum
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of the root and ephemeral disk sizes (in GB) of the
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instances that run on the hosts.</para>
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<para>The <literal>used_now</literal> row shows the sum
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of the resources allocated to the instances
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that run on the host plus the resources allocated to
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the virtual machine of the host itself.</para>
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<para>The <literal>used_max</literal> row shows the sum
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of the resources allocated to the instances
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that run on the host.</para>
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<note> <para>These values are computed by using only information
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about the flavors of the instances that run on the
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hosts. This command does not query the CPU usage,
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memory usage, or hard disk usage of the physical
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host.</para> </note> </step> </procedure>
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<procedure xml:id="instance_usage_statistics">
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<title>To show instance usage statistics</title>
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<step>
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<para>Get CPU, memory, I/O, and network statistics for an
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instance.</para>
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<para>First, list instances:</para>
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<screen><prompt>$</prompt> <userinput>nova list</userinput>
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<computeroutput>+--------------------------------------+----------------------+--------+------------+-------------+------------------+
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| ID | Name | Status | Task State | Power State | Networks |
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+--------------------------------------+----------------------+--------+------------+-------------+------------------+
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| 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 | myCirrosServer | ACTIVE | None | Running | private=10.0.0.3 |
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| 8a99547e-7385-4ad1-ae50-4ecfaaad5f42 | myInstanceFromVolume | ACTIVE | None | Running | private=10.0.0.4 |
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+--------------------------------------+----------------------+--------+------------+-------------+------------------+</computeroutput></screen>
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<para>Then, get diagnostic statistics:</para>
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<screen><prompt>$</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>
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</step>
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<step> <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>
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</step>
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</procedure>
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</section>
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