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The purpose of this spec is to add a support for volumes hosted by Virtuozzo storage. Virtuozzo Storage is a fault-tolerant distributed storage system optimized for virtualization workloads. From client's point of view it is a remote file system storage similar to NFS or GlusterFS. A third-party vzstorage-ci system is running testing jobs on nova changes. CI wiki page: https://wiki.openstack.org/wiki/ThirdPartySystems/Virtuozzo_Storage_CI blueprint libvirt-vzstorage-volume-support Previously-approved: Mitaka Change-Id: Ide2c952c577b36ad1b7f72012336f300f2f3331c
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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===================================================================
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Libvirt: Support for attaching volumes located on Virtuozzo Storage
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===================================================================
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https://blueprints.launchpad.net/nova/+spec/libvirt-vzstorage-volume-support
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The purpose of this blueprint is to add an ability to use volumes hosted by
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Virtuozzo Storage [1]_ previously implemented as one of Cinder Drivers [2]_.
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Problem description
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===================
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Virtuozzo Storage is a fault-tolerant distributed storage system. From
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client's point of view it is a remote file system storage similar to
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NFS, GlusterFS or CIFS.
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Virtuozzo Storage allows to use disk space of conventional linux systems to
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provide fault-tolerant storage with automatic recovery. It's optimized for
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performance of virtualization workloads and has strong data consistency.
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Use Cases
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----------
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A user is able to attach block storage exported in the form of virtual
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disks resided on Virtuozzo Storage to Nova instances.
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Proposed change
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===============
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A new volume driver is added in order to support attaching volumes resided on
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Virtuozzo Storage. This volume driver has a similiar workflow to what NFS
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and SMBFS volume drivers have.
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The CI system [3]_ runs on Nova tree and checks each Nova patch with
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Virtozzo Storage and leaves a comment about status of tempest run.
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Alternatives
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------------
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None
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Data model impact
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-----------------
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None
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REST API impact
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---------------
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None
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Security impact
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---------------
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The share credentials will be parsed in the volume connection info and used
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when mounting a Virtuozzo Storage cluster.
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Notifications impact
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--------------------
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None
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Other end user impact
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---------------------
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None
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Performance Impact
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------------------
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None
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Other deployer impact
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---------------------
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The deployer will be able to configure the path where the Virtuoozo Storage
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clusters will be mounted, as well as setting mount flags.
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Developer impact
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----------------
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None
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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eantyshev
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Other contributors:
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mnestratov, dguryanov
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Work Items
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----------
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Spec approval.
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Implementation: [4]_
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Documentaiton.
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Dependencies
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============
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Remotefs os-brick part merged in review [5]_
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Cinder part implementation merged in review [6]_
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Testing
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=======
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This feature should be tested in conjunction with the Virtuozzo Storage
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Cinder Volume driver. The existing Tempest tests along with the related unit
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tests should be enough.
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A third party CI testing system is up and running [3]_
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Documentation Impact
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====================
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Using the Virtuozzo Storage backend should be documented.
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References
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==========
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.. [1] https://virtuozzo.com/wp-content/uploads/2016/03/Virtuozzo_Virtuozzo_Storage_DS_A4_EN_20160305.pdf
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.. [2] https://blueprints.launchpad.net/cinder/+spec/virtuozzo-cloud-storage-support
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.. [3] https://wiki.openstack.org/wiki/ThirdPartySystems/Virtuozzo_Storage_CI
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.. [4] https://review.openstack.org/#/c/190843/
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.. [5] https://review.openstack.org/#/c/188805/
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.. [6] https://review.openstack.org/#/c/188869/
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History
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=======
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.. list-table:: Revisions
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:header-rows: 1
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* - Release Name
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- Description
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* - Mitaka
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- Approved.
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* - Newton
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- Re-introduced.
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