Bug 2221790

Summary: HA Pacemaker Solution supported in RHEL 9 ?
Product: Red Hat Enterprise Linux 9 Reporter: Aravind Mahadevan <armaha>
Component: pacemakerAssignee: Ken Gaillot <kgaillot>
Status: CLOSED NOTABUG QA Contact: cluster-qe <cluster-qe>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 9.0CC: amitkh, cluster-maint, omular
Target Milestone: rcKeywords: Triaged
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Last Closed: 2023-07-10 18:45:22 UTC Type: Bug
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Description Aravind Mahadevan 2023-07-10 18:40:09 UTC 
Description of problem:

We would like to know if HA pacemaker solution is supported on RHEL 9.
SQL Server Setting up AG cluster document currently has RHEL 7 and RHEL 8 details for configuring pacemaker https://learn.microsoft.com/en-us/sql/linux/sql-server-linux-availability-group-cluster-pacemaker?view=sql-server-ver16&tabs=rhel

Is HA pacemaker solution supported on RHEL 9 ?
Version-Release number of selected component (if applicable):


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Additional info:
Comment 1 Ken Gaillot 2023-07-10 18:45:22 UTC 
Hi,

Yes, the RHEL High Availability Add-On (including Pacemaker) is supported for RHEL 9. It is backward compatible with the version in RHEL 8, and the steps for configuring it should be nearly identical.

Probably the most noticeable change is that in status output, "Promoted" and "Unpromoted" are now displayed as roles instead of "Master" and "Slave" for promotable clones.
Comment 2 Aravind Mahadevan 2023-07-13 14:00:24 UTC 
Hello Ken, Thanks for your inputs.
Could you please share the commands for configuration as well, and is it supported on pcs or crm ? 

Thanks,
Aravind
Comment 3 Ken Gaillot 2023-07-13 14:25:56 UTC 
(In reply to Aravind Mahadevan from comment #2)
> Hello Ken, Thanks for your inputs.
> Could you please share the commands for configuration as well, and is it
> supported on pcs or crm ? 
> 
> Thanks,
> Aravind

Hi,

RHEL provides pcs:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_and_managing_high_availability_clusters/assembly_overview-of-high-availability-configuring-and-managing-high-availability-clusters

The upstream change log lists the key differences between pcs 0.9 in RHEL 8 and pcs 0.10 in 9:

https://github.com/ClusterLabs/pcs/blob/main/CHANGELOG.md#0101---2018-11-23
Comment 4 Ondrej Mular 2023-07-14 10:31:42 UTC 
(In reply to Ken Gaillot from comment #3)
> (In reply to Aravind Mahadevan from comment #2)
> > Hello Ken, Thanks for your inputs.
> > Could you please share the commands for configuration as well, and is it
> > supported on pcs or crm ? 
> > 
> > Thanks,
> > Aravind
> 
> Hi,
> 
> RHEL provides pcs:
> 
> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/
> html/configuring_and_managing_high_availability_clusters/assembly_overview-
> of-high-availability-configuring-and-managing-high-availability-clusters
> 
> The upstream change log lists the key differences between pcs 0.9 in RHEL 8
> and pcs 0.10 in 9:
> 
> https://github.com/ClusterLabs/pcs/blob/main/CHANGELOG.md#0101---2018-11-23

Actually, pcs 0.10 is in RHEL 8 and pcs 0.11 is in RHEL 9. There are not as
many differences between pcs 0.10 and pcs 0.11. Most of the changes are in
the output of some commands. See upstream changelog (most important are
removed and changed sections) for full list of changes:
https://github.com/ClusterLabs/pcs/blob/main/CHANGELOG.md#0111---2021-11-30