[ClusterLabs] Antw: [EXT] Re: what is the "best" way to completely shutdown a two-node cluster ?

[Jehan-Guillaume de Rorthais]

On Fri, 11 Feb 2022 08:07:33 +0100
"Ulrich Windl" <Ulrich.Windl at rz.uni-regensburg.de> wrote:

> >> Jehan-Guillaume de Rorthais <jgdr at dalibo.com> schrieb am 10.02.2022 um  
> 16:40 in Nachricht <20220210164000.2e395a37 at karst>:
> >  ...
> > I wonder if after the cluster shutdown complete, the target-role=Stopped 
> > could be removed/edited offline with eg. crmadmin? That would make
> > VirtualDomain startable on boot.  
> 
> It has also discussed before: "restart" is implemented by "first change role
> to stopped, then change role to started".
> If the performing node is fenced due to a stop failure, the resource is never
> started.
> So what's needed is a transient (i.e.: not saved in CIB) "restart" operation,
> that reverts to the previous state (started, most likely) if the the node
> performing it dies.
> Now transfer this to "stop-all-resources": The role attribute in the CIB would
> never be changed, but maybe just all the LRMs would stop their resources,
> eventually shutting down and when the node comes up again, the previous state
> will be re-established.

Nice, indeed.

> > ...
> > Last, if Bernd need to stop gracefully the VirtualDomain paying attention to
> > the I/O load, maybe he doesn't want them start automatically on boot for
> > the exact same reason anyway?  
> 
> But you can limit the number of concurrent invocations and migrations, right?
> Unfortunately I cannot remember the parameter.

I suppose you are talking about cluster option "batch-limit"?
But then, this would have to be set to eg. "batch-limit=1" (?) only during
shutdown/startup action, to avoid slowing down cluster action during normal
operation.

++