[Linux-cluster] CLVMD without GFS

[brem belguebli]

Alfredo,

The resource Rafael created operates at LV level not FS.

As far as I understand, a FS exclusive tag would be efficient only under
rgmanager control, but it wouldn't if an admin decided to mount the FS by
hand on another cluster node.

Brem


2009/8/18, Moralejo, Alfredo <alfredo.moralejo at roche.com>:
>
>  Hi Brem,
>
>
>
> Maybe I did not explain it properly.
>
>
>
> What I mean is that fs resource should activate the filesystems in *
> exclusive* mode as the resource created by Rafael does (lvm-cluster.sh) as
> I far as I understand to ensure the filesystem can not be mounted in other
> nodes accidentally.
>
>
>
> Best regards,
>
>
>
> Alfredo
>
>
>
>
>  ------------------------------
>
> *From:* linux-cluster-bounces at redhat.com [mailto:
> linux-cluster-bounces at redhat.com] *On Behalf Of *brem belguebli
> *Sent:* Tuesday, August 18, 2009 11:10 AM
> *To:* linux clustering
> *Subject:* Re: [Linux-cluster] CLVMD without GFS
>
>
>
> Hello Alfredo,
>
>
>
> For the exclusive bypass, I have opened a bugzilla ticket. Hopefully it'll
> be fixed (enhanced)0
>
>
>
> For your second point, I'm not sure to ubndestand what you're saying.
>
>
>
> My concern is to avoid manual activation on the wrong node, not an
> accidental rgmanager activation.
>
>
>
> Even if you configure your FS resource as exclusive, if it is possible,
> this won't be of any effect with ext3 outside of rgmanager control as it is
> not cluster aware.
>
> Brem
>
> 2009/8/18, Moralejo, Alfredo <alfredo.moralejo at roche.com>:
>
> Hi,
>
>
>
> I have the same concern with the activation of non-GFS file systems and I
> agree with the idea of using exclusive activation (keeping in mind that the
> strange behavior of exclusive tag being bypassed should be fixed). However,
> from my point of view, the best way is not to create a new resource but
> adding a new “exclusive” option to the regular fs resource or something like
> that, as I think it’s the desired behavior most times the fs resource is
> used.
>
>
>
> Best regards,
>
>
>
> Alfredo
>
>
>
>
>
>
>  ------------------------------
>
> *From:* linux-cluster-bounces at redhat.com [mailto:
> linux-cluster-bounces at redhat.com] *On Behalf Of *brem belguebli
> *Sent:* Saturday, August 01, 2009 2:25 AM
> *To:* linux clustering
> *Subject:* Re: [Linux-cluster] CLVMD without GFS
>
>
>
> Hi Rafael,
>
> Of course, that is what I was telling you the other day, your script works
> fine, but I just wanted to twist a little clvm.
>
> The prerequisites are already setup (locking type, dm-mp, lvm, etc...).
>
> The only thing that disturbes me is that you can bypass under certain
> conditions the locking.
>
> Thanks for the help
>
> Brem
>
>
>
> 2009/8/1 Rafael Micó Miranda <rmicmirregs at gmail.com>
>
> Hi Brem,
>
> El vie, 31-07-2009 a las 06:09 -0400, crosa at redhat.com escribió:
>
> >
> > --- mensagem original ---
> > De: brem belguebli <brem.belguebli at gmail.com>
> > Assunto: Re: [Linux-cluster] CLVMD without GFS
> > Data: 29 de Julho de 2009
> > Hora: 10:1:29
> >
> > Hi Rafael,
> >
> > Just posted the basic tests I'm doing on both linux-cluster and
> linux-lvm.
> >
> > I can't get exclusive activation to work properly, I may be missing some
> > step in my process.
> >
> > Brem
> >
> >
>
> >
>
> > --
> > Linux-cluster mailing list
> > Linux-cluster at redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-cluster
>
> Sorry, i'm not sure if I missed this mail.
>
> Maybe i need to explain a couple of things first, just to make them
> clear.
>
> As part of the use of the lvm-cluster.sh resource script, you need to:
>
> 1.- Configure properly the lock type into lvm.conf to type 3 (example
> into this link:
>
> https://www.redhat.com/archives/linux-cluster/2009-July/msg00253.html
>
> )
>
> 2.- Configure your multipathing software
>
> 3.- Create your Physical Volumes
>
> 4.- Configure your Volume Groups as clustered Volume Groups
>
> 5.- Create your Logical Volumens into the clustered Volume Groups
>
> 6.- And, and the not so obvious, de-activate all the Logical Volumes you
> plan to use as exclusive Logical Volumes (using exclusive flag).
>
> De-activation can be done with "vgchange -an volgrp01/logvol01" or
> similar command.
>
> If you don't do step 6, you will receive an error message when executing
> "lvchange -aey volgrp01/logvol01". This command is executed (with the
> proper volume group and logical volume names) internally in the resource
> script.
>
> I designed the lvm-cluster.sh resource script to be verbose, maybe you
> can copy here your logs (default to /var/log/messages on RHEL systems).
>
> Cheers and thanks,
>
> Rafael
>
> --
> Rafael Micó Miranda
>
>
> --
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> Linux-cluster at redhat.com
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>
>
>
>
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>
>
>
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