Bug 1731410 - We should be mentioning that RGW creates 6 additional pools in the Ceph cluster
Summary: We should be mentioning that RGW creates 6 additional pools in the Ceph cluster
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: documentation
Version: 13.0 (Queens)
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: Laura Marsh
QA Contact: RHOS Documentation Team
Depends On:
Blocks: 1821844 1821845 1821901
TreeView+ depends on / blocked
Reported: 2019-07-19 11:04 UTC by Giulio Fidente
Modified: 2020-04-07 19:26 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1821844 (view as bug list)
Last Closed: 2020-04-07 19:26:14 UTC
Target Upstream Version:

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Description Giulio Fidente 2019-07-19 11:04:25 UTC
We should be mentioning in the doc that when opting for the deployment of RGW 3 additional pools (needed by RGW) will be created hence the CephPoolDefaultPgNum parameter must be set appropriately.

We have a few references in the doc pointing to how the default pg_num for the ceph pools should be calculated and customized [1]

Ceph allows for a default of 250 pgs per OSD; we should mention in [2] that when opting for the deployment of RGW, 3 more pools will be created hence the default pools pg_num must be calculated accordingly. The default pg_num for all new pools can be set using the heat parameter "CephPoolDefaultPgNum".

Maybe it is worth mentioning this in [3] as well (the sample config yaml)

1. https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/deploying_an_overcloud_with_containerized_red_hat_ceph/index#custom-ceph-pools
2. https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/deploying_an_overcloud_with_containerized_red_hat_ceph/index#ceph-rgw
3. https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/deploying_an_overcloud_with_containerized_red_hat_ceph/index#envfile-createceph

Comment 5 Giulio Fidente 2019-12-06 17:53:05 UTC
Note that, as explained in [1], RGW will create 6 more pools, not just 3 more as initially described in the BZ report. When deployed by OSP Director, the pool names (which follow the RGW zone name) will be:


1. https://docs.ceph.com/docs/master/radosgw/pools/#pool-namespaces

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