62 lines
2.2 KiB
ReStructuredText
62 lines
2.2 KiB
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==================
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Resize an instance
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==================
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You can change the size of an instance by changing its flavor. This rebuilds
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the instance and therefore results in a restart.
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To list the VMs you want to resize, run:
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.. code-block:: console
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$ openstack server list
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Once you have the name or UUID of the server you wish to resize, resize it
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using the :command:`openstack server resize` command:
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.. code-block:: console
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$ openstack server resize --flavor FLAVOR SERVER
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.. note::
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By default, the :command:`openstack server resize` command gives the guest
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operating system a chance to perform a controlled shutdown before the
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instance is powered off and the instance is resized. This behavior can be
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configured by the administrator but it can also be overridden on a per image
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basis using the ``os_shutdown_timeout`` image metadata setting. This allows
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different types of operating systems to specify how much time they need to
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shut down cleanly. See :glance-doc:`Useful image properties
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<admin/useful-image-properties>` for details.
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Resizing can take some time. During this time, the instance status will be
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``RESIZE``:
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.. code-block:: console
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$ openstack server list
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+----------------------+----------------+--------+-----------------------------------------+
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| ID | Name | Status | Networks |
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+----------------------+----------------+--------+-----------------------------------------+
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| 67bc9a9a-5928-47c... | myCirrosServer | RESIZE | admin_internal_net=192.168.111.139 |
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+----------------------+----------------+--------+-----------------------------------------+
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When the resize completes, the instance status will be ``VERIFY_RESIZE``.
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You can now confirm the resize to change the status to ``ACTIVE``:
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.. code-block:: console
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$ openstack server resize confirm SERVER
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.. note::
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The resized server may be automatically confirmed based on the
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administrator's configuration of the deployment.
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If the resize does not work as expected, you can revert the resize. This will
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revert the instance to the old flavor and change the status to ``ACTIVE``:
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.. code-block:: console
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$ openstack server resize revert SERVER
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