Bug 1309550
| Summary: | [RFE] Update Cinder heat template to allow multiple Ceph pools | ||
|---|---|---|---|
| Product: | Red Hat OpenStack | Reporter: | Kyle Bader <kbader> |
| Component: | openstack-tripleo-heat-templates | Assignee: | Alan Bishop <abishop> |
| Status: | CLOSED ERRATA | QA Contact: | Yogev Rabl <yrabl> |
| Severity: | high | Docs Contact: | Derek <dcadzow> |
| Priority: | high | ||
| Version: | 12.0 (Pike) | CC: | alan_bishop, arkady_kanevsky, cdevine, christopher_dearborn, dbecker, dchia, gael_rehault, gcharot, gfidente, ipilcher, joherr, john_terpstra, John_walsh, jraju, jschluet, j_t_williams, kbader, knylande, kschinck, kurt_hey, martinsson.patrik, mburns, morazi, nlevine, nsatsia, Paul_Dardeau, pgrist, rajini.karthik, randy_perryman, rhel-osp-director-maint, rsussman, scohen, smerrow, sputhenp, wayne_allen, yrabl |
| Target Milestone: | Upstream M2 | Keywords: | FutureFeature |
| Target Release: | 13.0 (Queens) | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | openstack-tripleo-heat-templates-8.0.0-0.20180103192340.el7ost puppet-tripleo-8.1.1-0.20180102165828.el7ost | Doc Type: | Enhancement |
| Doc Text: |
A new CinderRbdExtraPools Heat parameter has been added which specifies a list of Ceph pools for use with RBD backends for Cinder. An extra Cinder RBD backend driver is created for each pool in the list. This is in addition to the standard RBD backend driver associated with the CinderRbdPoolName. The new parameter is optional and defaults to an empty list. All of the pools are associated with a single Ceph cluster.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-06-27 13:26:22 UTC | Type: | Feature Request |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1466008 | ||
| Bug Blocks: | 1413723, 1419948, 1458798 | ||
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Description
Kyle Bader
2016-02-18 05:46:18 UTC
This bug did not make the OSP 8.0 release. It is being deferred to OSP 10. This bugzilla has been removed from the release and needs to be reviewed and Triaged for another Target Release. Currently, the RBD pool and associated Cinder backend are defined by these two
TripleO settings:
o CinderRbdPoolName
- THT parameter
- Default value: "volumes"
o cinder::backend::rbd::volume_backend_name
- Puppet hiera data
- Default value: "tripleo_ceph"
The design I have in mind would add a new THT parameter:
CinderRbdExtraPools:
default: ''
description: >
List of extra Ceph pools for use with RBD backends for Cinder. An
extra Cinder RBD backend driver is created for each pool in the
list. This is in addition to the standard RBD backend driver
associated with the CinderRbdPoolName.
type: comma_delimited_list
Any pools specified in the (optional) list would automatically generate
additional Cinder backends. For example, deploying an environment file that
contained this:
parameter_defaults:
CinderRbdExtraPools: fast,slow
Would result in a Cinder deployment with three RBD backends:
RBD Pool Cinder Backend
-------- -----------------
volumes tripleo_ceph
fast tripelo_ceph_fast
slow tripleo_ceph_slow
Note 1: For Ceph clusters managed by TripleO, the "CephPools" THT parameter
can be used to create additional pools.
parameter_defaults:
CephPools:
fast:
pg_num: 1024
pgp_num: 1024
slow:
pg_num: 512
pgp_num: 512
Note 2: The user/operator would be responsible for creating the Ceph CRUSH map
necessary to establish appropriate service levels for each RBD pool.
Note 3: The user/operator would be responsible for creating Cinder volume
types associated with each of the Cinder RBD backends. That is, the Cinder
backends would be automatically created, but the Cinder volume types would
need to be defined post-deployment.
Assuming it is sufficient to create additional Cinder backends pointing to different pools in the same Ceph cluster, this sounds sane to me. We might have to revisit how it is implemented if we moved to support multiple Ceph clusters but to preserve the user experience I suppose we could assume the first to be the one where the additional backends will point to. The ability to specify additional cinder backends each of which points to a specific Ceph Pool is a minimum request. We have had discussion with sites that are seeking to configure a default Ceph cluster for an OpenStack cluster, but also to share multiple Ceph clusters across OpenStack clusters. Example: 1x All Flash high performance Ceph cluster (0.1 PB) shared across OpenStack clusters as needed 1x Ultra High Capacity Ceph cluster for archival, shared across OpenStack clusters as needed (in once case 400 nodes) Per Ceph cluster for dedicated use within that OpenStack cluster. https://blueprints.launchpad.net/tripleo/+spec/multiple-cinder-rbd-backend will be proposed at the upcoming Queens PTG. Patches have merged upstream. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:2086 |