[ClusterLabs] DRBD + VDO HowTo?

Eric Robinson eric.robinson at psmnv.com
Tue May 18 10:34:57 EDT 2021

> Now, that's becoming ridiculous. Nobody said "use whatever upstream
> ships" because upstream probably never intended it to be used in a cluster
> environment. But if you are going to write your own LSB/OCF script anyway,
> you can just as well write your own service. Which is much simpler at this
> point

It was late and I was imprecise in what I said. I didn't accuse you of saying "use whatever upstream ships." You missed where I said in an earlier email that I tried writing my own custom systemd service, and that had the same problems.

> > Also, the assumption that the resource is active does not seem to be safe
> to make. I've been doing a lot of additional testing, and I think the reason
> why systemd, ocf, and lsb scripts have all failed me is because Pacemaker is
> not honoring the order constraints. IT keeps trying to start the vdo device
> before promoting drbd on the target node. I will check it some more and
> confirm.
> Pacemaker is correctly honoring your constraints. Your constraints do not
> forbid starting VDO on demoted instances. See another e-mail.

I saw your other email and will look into that.

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