On 2008-10-30T12:40:43, Annette Jäkel <[EMAIL PROTECTED]> wrote:
> But my problem is that specific order of the nfsserver resource after all
> filesystem resources. This works fine until one of the file system crashes.
> Then nfsserver stops and the whole system doesnt work. Thats not what I
> want. If a file system crashes, for example because physical device was
> broken, the remaining devices and file systems should work and exported to
> clients. So maybe the nfsserver should start without any order? But I'm not
> shure that this is a good idea. I also dont want to run NFS, if there is no
> device it can manage.
Ah, OK, so the interleaving is not your highest priority.
I think rsc_order/_colocation constraints with score=0 achieve exactly
what you need.
> Meanwhile I read within Michael Schwartzkopff's Linux-HA book. He presented
> an example NFS service with DRBD devices and if I understand all setup steps
> right, there is really no order from any resource to nfsserver. I dont
> understand this.
That would be wrong.
> Within this context I think about setting up a group of all filesystem
> resources, setting attribute "ordered" to "false" and define a single
> resource of nfsserver ordered after the group - but dont wait for the
> complete start of the group, but starts if any resource of the group is
> running.
Well, that is the interleave part, which is not necessarily required for
correctness, but for speeding up the start. That is not currently
possible.
I'm also not sure if it is indeed what you want; you want to have tried
starting everything before bringing online "nfsserver", I think, so that
they are all present to be exported - but not not start nfsserver if
just one of them has failed to start.
> In another thread (HA-NFS strategic question) Xinwei Hu suggested not to
> manage nfs but the step of exporting the devices, but seems theres no RA for
> this specific task. Until now I write /etc/exports by hand and call
> "exportfs -a" from outside heartbeat, if I add or delete a filesystem.
Yes, this is currently missing I think. Even Xinwei's nfsserver RA is
"global" and doesn't support managing individual exports. It would be
great if this was added.
Regards,
Lars
--
Teamlead Kernel, SuSE Labs, Research and Development
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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