[Linux-cluster] GFS in cluster

[Paras pradhan]

I found luci to be easier.. so I used that. But stopped using it also since
Luci is a crap if you have multi path devices and storage clvm cluster. Now
I am using command line tools to create/modify GFS shares and vi to edit
/etc/cluster.conf file.

I guess the redhat docs explains how to use system-config-cluster.

Paras.


On Thu, Apr 29, 2010 at 3:18 PM, Srija <swap_project at yahoo.com> wrote:

> Thanks Paras,
>
> Can it be possible to send similar configuration using
> system-config-cluster.  Or if you can
> give me some pointers to use the similar configuration using
> system-config-cluster that will be really appreciated.
>
> Thanks again
>
>
> --- On *Tue, 4/27/10, Paras pradhan <pradhanparas at gmail.com>* wrote:
>
>
> From: Paras pradhan <pradhanparas at gmail.com>
>
> Subject: Re: [Linux-cluster] GFS in cluster
> To: "linux clustering" <linux-cluster at redhat.com>
> Date: Tuesday, April 27, 2010, 3:40 PM
>
>
>
>
> On Tue, Apr 27, 2010 at 1:43 PM, Srija <swap_project at yahoo.com<http://us.mc1128.mail.yahoo.com/mc/compose?to=swap_project@yahoo.com>
> > wrote:
>
>> Hi ,
>>
>> Sorry for replying in late, became busy with other work.
>>
>> I have gone through the document you mentioned. I have already mounted
>>  the GFS on each node. I am building the guests on this GFS file system and
>> all the nodes are  zen hosts.
>>
>> My question is,  the file system will be available from each node but the
>> guests will be only available from the node from where the xm create is
>> being executed.
>>
>>  - Suppose the guests are in node1. Now if node1 gone down then all the
>>    guests will go down too. But if the guests are enabled from all the
>>    nodes then if node1 gone down, then still in the other nodes the guests
>>    are running.
>>
>>  - That's why  my first email is for that should I need to create any
>>    service so  that if any script is being set under the service and in
>>    that script ,I can mention xm create create etc etc, to bring up the
>>    guests in other node and so on.
>>
>> So pl. advice me now what will be the best procedure  to follow in the
>> above scenario which I mentioned.
>>
>
> If you have GFS mounted on all the nodes, then you need to create your xen
> hosts on that shared GFS partition and then create virtual machine services
> to control(recovery,restart)  the xen hosts. You can do that from Luci.
>
> This might help you
>
> http://magazine.redhat.com/2007/08/23/automated-failover-and-recovery-of-virtualized-guests-in-advanced-platform/
>
> Paras.
>
>
>
>>
>> Thanks again
>>
>>
>>
>>
>> --- On Tue, 4/20/10, Steven Whitehouse <swhiteho at redhat.com<http://us.mc1128.mail.yahoo.com/mc/compose?to=swhiteho@redhat.com>>
>> wrote:
>>
>> > From: Steven Whitehouse <swhiteho at redhat.com<http://us.mc1128.mail.yahoo.com/mc/compose?to=swhiteho@redhat.com>
>> >
>> > Subject: Re: [Linux-cluster] GFS in cluster
>> > To: "linux clustering" <linux-cluster at redhat.com<http://us.mc1128.mail.yahoo.com/mc/compose?to=linux-cluster@redhat.com>
>> >
>> > Date: Tuesday, April 20, 2010, 4:48 AM
>>  > Hi,
>> >
>> > On Mon, 2010-04-19 at 13:31 -0700, Srija wrote:
>> > > Hi,
>> > >
>> > >  I have created a GFS filey system  as
>> > shared between three nodes clusters.
>> > >  The file system is being mounted in
>> > >  the three nodes and I set the mount points in
>> > the /etc/fstab,
>> > >
>> > >  Want to know how the cluster will keep the track
>> > of the GFS file system.
>> > >  How the fence/lock_dlm will work?
>> > >
>> > >  Do i need to set the GFS in a service? If yes ,
>> > what will be the
>> > >  resources under the service?
>> > >
>> > >  Will be really appreciated if I get some
>> > document to proceed further.
>> > >
>> > >  Thanks.
>> > >
>> > >
>> > You don't need to set GFS up as a service. Its
>> > automatically available
>> > on each node its mounted on. Have you seen the docs here?:
>> >
>> > http://www.redhat.com/docs/manuals/enterprise/
>> >
>> > That should be enough to get you started,
>> >
>> > Steve.
>> >
>> >
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>> >
>>
>>
>>
>>
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