178 lines
5.6 KiB
ReStructuredText
178 lines
5.6 KiB
ReStructuredText
.. _storage-tab:
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=======================================
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Create and manage volumes (Storage tab)
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=======================================
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A volume is a detachable block storage device similar to a USB hard drive.
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You can attach a volume to a running instance or detach a volume and
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attach it to another instance at any time. You can also create a snapshot
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from or delete a volume. Only administrative users can create volume types.
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OpenStack Block Storage enables you to add extra block-level storage to
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your OpenStack Compute instances. For detailed information, refer to the
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`OpenStack Cinder Guide
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<https://docs.openstack.org/cinder/latest/admin/index.html>`__.
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Create a volume
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----------------
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. Click :guilabel:`Create Volume`.
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#. On the :guilabel:`Create Volume` page, specify the following values.
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:guilabel:`Available Zone`: Select a availability zone for the volume.
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:guilabel:`Data Source Type`: Select one of the following options:
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* Blank Volume: If you choose this option, a new field for
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:guilabel:`Volume Type` displays. You can select the volume type
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from the list. You can create an empty volume. An empty volume does
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not contain a file system or a partition table.
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* Image: If you choose this option, a new field for
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:guilabel:`Operating System` displays. You can select the image
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from the list.
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* Volume Snapshot: If you choose this option, a new field for
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:guilabel:`Volume Snapshot` displays. You can select the
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snapshot from the list.
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:guilabel:`Volume Type`: Specify a volume type to choose an appropriate
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storage back end.
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:guilabel:`Capacity (GiB)`: Specify the size of the volume, in gibibytes (GiB).
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:guilabel:`Name`: Specify a name to identify the volume.
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#. Click :guilabel:`Confirm`.
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You have successfully created the volume. You can view the volume from
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the :guilabel:`Volumes` tab.
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Attach a volume to an instance
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-------------------------------
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After you create one or more volumes, you can attach them to instances.
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You can attach a volume to one instance at a time.
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. Select the volume to add to an instance.
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#. In the :guilabel:`Action` column, select :guilabel:`Instance Related`
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and click :guilabel:`Attach`.
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#. In the :guilabel:`Attach` dialog box, select an instance.
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#. Click :guilabel:`OK`.
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The dashboard shows the instance to which the volume is now attached
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and the device name.
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You can view the status of a volume in the Volumes tab of the dashboard.
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The volume is either Available or In-Use.
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Now you can log in to the instance and mount, format, and use the disk.
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Detach a volume from an instance
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--------------------------------
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. In the :guilabel:`Action` column of the volume, select
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:guilabel:`Instance Related` and click :guilabel:`Detach`.
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#. In the :guilabel:`Detach` dialog box, select an instance.
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#. Click :guilabel:`OK`.
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A message indicates whether the action was successful.
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Create a snapshot from a volume
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--------------------------------
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. Select a volume from which to create a snapshot.
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#. In the :guilabel:`Action` column, select :guilabel:`Data Protection` and
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click :guilabel:`Create Snapshot`.
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#. In the :guilabel:`Create Volume Snapshot` dialog box, enter a snapshot name.
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#. Click :guilabel:`OK`.
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The dashboard shows the new volume snapshot in :guilabel:`Volume Snapshots` tab.
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Edit a volume
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--------------
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. In the :guilabel:`Action` column of the volume, click :guilabel:`Edit`.
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#. In the :guilabel:`Edit` dialog box, update the name and description
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of the volume.
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#. Click :guilabel:`OK`.
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.. note::
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You can extend a volume by using the :guilabel:`Extend Volume`
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option available in the :guilabel:`More` dropdown list and entering the
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new value for volume size.
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Delete a volume
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----------------
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When you delete an instance, the data in its attached volumes is not
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deleted.
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#. Log in to the dashboard.
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#. Select the appropriate project from the Switch Project menu at the top left.
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#. On the :guilabel:`Console` page, open the :guilabel:`Storage` tab and
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click :guilabel:`Volumes` category.
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#. Select the check boxes for the volumes that you want to delete.
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#. Click :guilabel:`Delete` and confirm your choice.
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.. note::
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If you select the :guilabel:`cascading deletion` check box, when the
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volume has snapshots, the associated snapshot will be automatically
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deleted first, and then the volume will be deleted, thereby improving
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the success rate of deleting the volume.
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A message indicates whether the action was successful.
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