950a312118
update directory path for cinder.conf Change-Id: I7c090b2115b289f29c02e61c5de1bbfed3b61907
76 lines
3.0 KiB
ReStructuredText
76 lines
3.0 KiB
ReStructuredText
==============
|
|
Manage volumes
|
|
==============
|
|
|
|
The default OpenStack Block Storage service implementation is an
|
|
iSCSI solution that uses :term:`Logical Volume Manager (LVM)` for Linux.
|
|
|
|
.. note::
|
|
|
|
The OpenStack Block Storage service is not a shared storage
|
|
solution like a Network Attached Storage (NAS) of NFS volumes
|
|
where you can attach a volume to multiple servers. With the
|
|
OpenStack Block Storage service, you can attach a volume to only
|
|
one instance at a time.
|
|
|
|
The OpenStack Block Storage service also provides drivers that
|
|
enable you to use several vendors' back-end storage devices in
|
|
addition to the base LVM implementation. These storage devices can
|
|
also be used instead of the base LVM installation.
|
|
|
|
This high-level procedure shows you how to create and attach a volume
|
|
to a server instance.
|
|
|
|
**To create and attach a volume to an instance**
|
|
|
|
#. Configure the OpenStack Compute and the OpenStack Block Storage
|
|
services through the ``/etc/cinder/cinder.conf`` file.
|
|
#. Use the :command:`openstack volume create ` command to create a volume.
|
|
This command creates an LV into the volume group (VG) ``cinder-volumes``.
|
|
#. Use the :command:`openstack server add volume` command to attach the
|
|
volume to an instance. This command creates a unique :term:`IQN` that is
|
|
exposed to the compute node.
|
|
|
|
* The compute node, which runs the instance, now has an active
|
|
iSCSI session and new local storage (usually a ``/dev/sdX``
|
|
disk).
|
|
* Libvirt uses that local storage as storage for the instance. The
|
|
instance gets a new disk (usually a ``/dev/vdX`` disk).
|
|
|
|
For this particular walkthrough, one cloud controller runs
|
|
``nova-api``, ``nova-scheduler``, ``nova-objectstore``,
|
|
``nova-network`` and ``cinder-*`` services. Two additional compute
|
|
nodes run ``nova-compute``. The walkthrough uses a custom
|
|
partitioning scheme that carves out 60 GB of space and labels it as
|
|
LVM. The network uses the ``FlatManager`` and ``NetworkManager``
|
|
settings for OpenStack Compute.
|
|
|
|
The network mode does not interfere with OpenStack Block Storage
|
|
operations, but you must set up networking for Block Storage to work.
|
|
For details, see :ref:`networking`.
|
|
|
|
To set up Compute to use volumes, ensure that Block Storage is
|
|
installed along with ``lvm2``. This guide describes how to
|
|
troubleshoot your installation and back up your Compute volumes.
|
|
|
|
.. toctree::
|
|
|
|
blockstorage-boot-from-volume.rst
|
|
blockstorage_nfs_backend.rst
|
|
blockstorage_glusterfs_backend.rst
|
|
blockstorage_multi_backend.rst
|
|
blockstorage_backup_disks.rst
|
|
blockstorage_volume_migration.rst
|
|
blockstorage_glusterfs_removal.rst
|
|
blockstorage_volume_backups.rst
|
|
blockstorage_volume_backups_export_import.rst
|
|
blockstorage-lio-iscsi-support.rst
|
|
blockstorage_volume_number_weigher.rst
|
|
blockstorage-consistency-groups.rst
|
|
blockstorage-driver-filter-weighing.rst
|
|
blockstorage_ratelimit_volume_copy_bandwidth.rst
|
|
blockstorage_over_subscription.rst
|
|
blockstorage_image_volume_cache.rst
|
|
blockstorage_volume_backed_image.rst
|
|
blockstorage_get_capabilities.rst
|