[ClusterLabs] Antw: OS Patching Process

[Dmitri Maziuk]

On 2016-11-23 02:23, Ulrich Windl wrote:

> I'd recommend making a backup of the DRBD data (you always should, anyway),
> the shut down the cluster, upgrade all the needed components, then start the
> cluster again. Do your basic tests. If you corrupted your data, re-create DRBD
> from scratch. Then test again. If your data is currupted again, the new version
> has a problem. Then you should go back to your old version (You have
> desaster-suitable backups, right?).

Very funny: run a full backup a small 100TB live mail spool for a kernel 
upgrade. When the cluster fscks it up, run a full restore. While the 
mail spool is highly unavailable.

How about an easier solution: never install any patches. Or better yet 
don't use pacemaker. Hilarious.

Dima