Re: DRBD user guide - GFS2 - recommendation to lose data?

On Thu, Aug 18, 2022 at 11:15 AM Matt Kereczman <[email protected]> wrote:
>
> On 8/16/22 16:58, Matt Kereczman wrote:
> > On 8/2/22 22:48, Reid Wahl wrote:
> >> Section 10.2:
> >> "Also, it is recommended to use some of DRBD’s features for automatic
> >> recovery from split brain. To do all this, include the following lines
> >> in the resource configuration:
> >> ...
> >> By configuring auto-recovery policies, you are configuring effectively
> >> configuring automatic data-loss! Be sure you understand the
> >> implications."
> >>
> >> If these options incur a risk of data loss, why are they recommended?
> >> I'm wary of recommending that to our users.
> >>
> >> https://linbit.com/drbd-user-guide/drbd-guide-9_0-en/#ch-gfs
> <snip>
> >
> > I've opened an internal issue to clean up this section for future
> > readers.
>
> Wanted to let you know we pushed some adjustments to the language in
> the GFS section of the DRBD user guide. Thanks for the feedback. If
> you have any further recommendations don't hesitate to reach out.

Thanks so much for the clarification and doc updates!

I 100% sympathize BTW. It's daunting to keep docs up to date,
especially where they involve other vendors'/projects' software.

As an FYI for if there's time to do an overhaul later, Red Hat stopped
supporting CLVMD + GFS2 as of RHEL 8. Now we use lvmlockd + GFS2. Here
are the relevant portions of the RHEL 9 product docs:
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html-single/configuring_and_managing_high_availability_clusters/index#assembly_configuring-gfs2-in-a-cluster-configuring-and-managing-high-availability-clusters
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_gfs2_file_systems/index

>
> --
> Matt Kereczman – Solutions Architect
> [email protected]
>
> LINBIT | Keeping the Digital World Running
> HA - DR - SDS
>
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-- 
Regards,

Reid Wahl (He/Him)
Senior Software Engineer, Red Hat
RHEL High Availability - Pacemaker

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