132 lines
5.5 KiB
ReStructuredText
132 lines
5.5 KiB
ReStructuredText
=============================================
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Show usage statistics for hosts and instances
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=============================================
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You can show basic statistics on resource usage for hosts and instances.
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.. note::
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For more sophisticated monitoring, see the
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`ceilometer <https://launchpad.net/ceilometer>`__ project. You can
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also use tools, such as `Ganglia <http://ganglia.info/>`__ or
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`Graphite <http://graphite.wikidot.com/>`__, to gather more detailed
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data.
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Show host usage statistics
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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The following examples show the host usage statistics for a host called
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``devstack``.
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* List the hosts and the nova-related services that run on them:
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.. code-block:: console
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$ nova host-list
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+-----------+-------------+----------+
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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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+-----------+-------------+----------+
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* Get a summary of resource usage of all of the instances running on
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the host:
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.. code-block:: console
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$ nova host-describe devstack
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+----------+----------------------------------+-----+-----------+---------+
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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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+----------+----------------------------------+-----+-----------+---------+
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The ``cpu`` column shows the sum of the virtual CPUs for instances
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running on the host.
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The ``memory_mb`` column shows the sum of the memory (in MB)
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allocated to the instances that run on the host.
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The ``disk_gb`` column shows the sum of the root and ephemeral disk
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sizes (in GB) of the instances that run on the host.
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The row that has the value ``used_now`` in the ``PROJECT`` column
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shows the sum of the resources allocated to the instances that run on
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the host, plus the resources allocated to the virtual machine of the
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host itself.
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The row that has the value ``used_max`` in the ``PROJECT`` column
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shows the sum of the resources allocated to the instances that run on
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the host.
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.. note::
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These values are computed by using information about the flavors of
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the 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 host.
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Show instance usage statistics
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Get CPU, memory, I/O, and network statistics for an instance.
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#. List instances:
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.. code-block:: console
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$ nova list
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+----------+----------------------+--------+------------+-------------+------------------+
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| ID | Name | Status | Task State | Power State | Networks |
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+----------+----------------------+--------+------------+-------------+------------------+
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| 84c6e... | myCirrosServer | ACTIVE | None | Running | private=10.0.0.3 |
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| 8a995... | myInstanceFromVolume | ACTIVE | None | Running | private=10.0.0.4 |
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+----------+----------------------+--------+------------+-------------+------------------+
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#. Get diagnostic statistics:
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.. code-block:: console
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$ nova diagnostics myCirrosServer
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+---------------------------+--------+
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| Property | Value |
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+---------------------------+--------+
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| memory | 524288 |
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| memory-actual | 524288 |
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| memory-rss | 6444 |
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| tap1fec8fb8-7a_rx | 22137 |
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| tap1fec8fb8-7a_rx_drop | 0 |
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| tap1fec8fb8-7a_rx_errors | 0 |
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| tap1fec8fb8-7a_rx_packets | 166 |
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| tap1fec8fb8-7a_tx | 18032 |
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| tap1fec8fb8-7a_tx_drop | 0 |
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| tap1fec8fb8-7a_tx_errors | 0 |
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| tap1fec8fb8-7a_tx_packets | 130 |
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| vda_errors | -1 |
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| vda_read | 2048 |
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| vda_read_req | 2 |
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| vda_write | 182272 |
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| vda_write_req | 74 |
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+---------------------------+--------+
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* Get summary statistics for each tenant:
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.. code-block:: console
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$ nova usage-list
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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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+----------------------------------+-----------+--------------+-----------+---------------+
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