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Add support for Quobyte cinder backend

https://blueprints.launchpad.net/kolla-ansible/+spec/cinder-quobyte-backend

Currently there is no option to enable the use of Quobyte as a backend for Cinder within kolla. Since there is support for Quobyte in Cinder and Nova, it should be a valid option in Kolla as well.

Problem description

Quobyte is a software defined storage solution that has a Cinder driver allowing it to be used with Cinder and Nova. Currently there is no option in Kolla to enable the use of Quobyte in Cinder and Nova.

Use cases

Allowing the use of a Quobyte volume as a backend for Cinder in Kolla.

Proposed change

  • Add an enable_cinder_backend_quobyte option to etc/kolla/globals.yml
  • If enabled, add the shared propagation to the /var/lib/nova/mnt bind, same as NFS. This would require extending the logic in ansible/roles/nova/defaults/main.yml to check if either NFS or Quobyte are enabled as Cinder backends.
  • Update documentation in doc/source/reference/cinder-guide.rst to include configuration of the Quobyte Cinder driver.

Security impact

None

Performance Impact

None

Implementation

Assignee(s)

Patrick O'Neill <[email protected]>

Milestones

Target Milestone for completion:
stein-1

Work Items

  1. Create variable in globals.yml to allow Cinder Quobyte backend to be enabled.
  2. Define Quobyte as a valid backend option in prechecks task.
  3. Add shared propagation to docker bind mounts in Nova.
  4. Update documentation to cover Cinder and Nova driver configuration for Quobyte.

Testing

Following the cinder reference of kolla to use quobyte as cinder backend. Perform checks to ensure that the backend is functional by creating volumes in cinder and mounting volumes to instances.

Documentation Impact

doc/source/reference/cinder-guide.rst needs to be updated to include a section on Quobyte driver configuration.