Bug 1836431

Summary:	Support Deployment with Autoscaler on existing cluster
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Ameena Suhani S H <amsyedha>
Component:	Ceph-Ansible	Assignee:	Guillaume Abrioux <gabrioux>
Status:	CLOSED ERRATA	QA Contact:	Manasa <mgowri>
Severity:	medium	Docs Contact:	Aron Gunn <agunn>
Priority:	unspecified
Version:	4.1	CC:	agunn, asakthiv, aschoen, ceph-eng-bugs, dsavinea, gabrioux, gmeno, hyelloji, mgowri, nthomas, tserlin, vashastr, vereddy, ykaul
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	4.2
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ceph-ansible-4.0.38-1.el8cp, ceph-ansible-4.0.38-1.el7cp	Doc Type:	Known Issue
Doc Text:	.Deploying the placement group autoscaler does not work as expected on CephFS related pools only To work around this issue, the placement group autoscaler can be manually enabled on CephFS related pools after the playbook has run.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-01-12 14:55:59 UTC	Type:	Bug
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:
Bug Blocks:	1816167, 1890121

Description Ameena Suhani S H 2020-05-15 21:15:30 UTC

Description of problem:

On standalone ceph, autoscalar feature is currently only supported on a newly deployed cluster or on an existing cluster using --limit mdss(prereq: no mds deployed previously) as in [1].

This bug is an improvement to support enabling of autoscalar feature on an existing cluster which has MDS daemon(i.e cephfs_data and cephfs_metadata pools)

[1]https://bugzilla.redhat.com/show_bug.cgi?id=1812929

Version-Release number of selected component (if applicable):

ceph-ansible-4.0.23-1.el7cp.noarch

Comment 8 Manasa 2020-09-07 09:09:28 UTC

I tried executing the site.yml playbook after updating the pg_autoscale_mode to True and setting target_size_ratio on ansible and ceph versions given below.

ansible-2.8.15-1.el8ae.noarch
ceph-ansible-4.0.25.2-1.el8cp.noarch

ceph version 14.2.8-91.el8cp 

I referred to the documentation given in https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/4/html-single/installation_guide/index?lb_target=preview#the-placement-group-autoscaler_install

The task for enabling autoscale is getting skipped, I have attached the logs and all.yml used.

Please let me know your views on this.

Comment 12 Manasa 2020-09-29 10:25:38 UTC

Hi Guillaume,

Sure, this bug can be re targeted to 4.3, I do not see any concern with this.

Regards,
Manasa Gowri

Comment 19 errata-xmlrpc 2021-01-12 14:55:59 UTC

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 (Important: Red Hat Ceph Storage 4.2 Security and Bug Fix update), 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/RHSA-2021:0081