[ClusterLabs] How to avoid starting resource where another resource has started

[Josep Maria Viñolas]

That's it! Thanks, I haven't seen it before.

Missatge de Digimer <lists at alteeve.ca> del dia ds., 13 de jul. 2019 a les
1:57:

> On 2019-07-12 6:03 p.m., Josep Maria Viñolas wrote:
> > Hi,
> >
> > I don't know if it is possible to decide to start resource A in one node
> > and then start another resource B avoiding the node where resource A has
> > been started.
>
> I think you want to look at anti-colocation.
>
> > In the end what we need is to have a four node cluster that will have
> > drbd9 and pacemaker will mount a resource (auto promoting it to master)
> > in one node also starting an nfs server and exporting that resource to
> > the other three nodes. Then pacemaker should start a nfs filesystem
> > mount from that master node on the other three nodes, but avoiding to
> > start the mount in the master node as that master node already has the
> > resource mounted and accessible.
> >
> > I know I could mount the resource in another folder, export it and then
> > mount it with nfs in all nodes in the correct mount point, even in the
> > master node that will export and mount the resource at the same time.
> > But I'm trying to avoid mounting from the same node that exports it, as
> > the performance will be affected (I assume).
> >
> > Any thoughts?
>
>
> --
> Digimer
> Papers and Projects: https://alteeve.com/w/
> "I am, somehow, less interested in the weight and convolutions of
> Einstein’s brain than in the near certainty that people of equal talent
> have lived and died in cotton fields and sweatshops." - Stephen Jay Gould
>
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