77 lines
2.7 KiB
ReStructuredText
77 lines
2.7 KiB
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==============
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Manage volumes
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==============
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The default OpenStack Block Storage service implementation is an
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iSCSI solution that uses :term:`Logical Volume Manager (LVM)` for Linux.
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.. note::
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The OpenStack Block Storage service also provides drivers that
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enable you to use several vendors' back-end storage devices in
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addition to the base LVM implementation. These storage devices can
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also be used instead of the base LVM installation.
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This high-level procedure shows you how to create and attach a volume
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to a server instance.
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**To create and attach a volume to an instance**
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#. Configure the OpenStack Compute and the OpenStack Block Storage
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services through the ``/etc/cinder/cinder.conf`` file.
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#. Use the :command:`openstack volume create` command to create a volume.
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This command creates an LV into the volume group (VG) ``cinder-volumes``.
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#. Use the :command:`openstack server add volume` command to attach the
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volume to an instance. This command creates a unique :term:`IQN <iSCSI
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Qualified Name (IQN)>` that is exposed to the compute node.
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* The compute node, which runs the instance, now has an active
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iSCSI session and new local storage (usually a ``/dev/sdX``
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disk).
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* Libvirt uses that local storage as storage for the instance. The
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instance gets a new disk (usually a ``/dev/vdX`` disk).
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For this particular walkthrough, one cloud controller runs
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``nova-api``, ``nova-scheduler``, ``nova-conductor`` and ``cinder-*``
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services. Two additional compute nodes run ``nova-compute``. The walkthrough
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uses a custom partitioning scheme that carves out 60 GB of space and labels it
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as LVM. The network uses the ``FlatManager`` and ``NetworkManager``
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settings for OpenStack Compute.
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The network mode does not interfere with OpenStack Block Storage
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operations, but you must set up networking for Block Storage to work.
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For details, see `networking`_.
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.. _networking: https://docs.openstack.org/neutron/latest/
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To set up Compute to use volumes, ensure that Block Storage is
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installed along with ``lvm2``. This guide describes how to
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troubleshoot your installation and back up your Compute volumes.
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.. toctree::
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boot-from-volume
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nfs-backend
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multi-backend
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backup-disks
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volume-migration
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volume-backups
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volume-backups-export-import
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lio-iscsi-support
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volume-number-weigher
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capacity-based-qos
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consistency-groups
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driver-filter-weighing
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ratelimit-volume-copy-bandwidth
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over-subscription
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image-volume-cache
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volume-backed-image
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get-capabilities
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user-visible-extra-specs
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groups
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.. note::
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To enable the use of encrypted volumes, see the setup instructions in
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:ref:`Create an encrypted volume type <create__encrypted_volume_type>`.
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