[DRBD-user] Cheap HA Cluster

[James Vanns]

I have a dom0->DRBD->LVM2->domU setup between two nodes here.

Jim

----- Original Message -----
From: "Nicolas Bouthors" <nbouthors at nbi.fr>
To: drbd-user at lists.linbit.com
Sent: 21 March 2007 17:48:22 o'clock (GMT) Europe/London
Subject: Re: [DRBD-user] Cheap HA Cluster

There was some discussion on the matter a few weeks ago. With real life
examples. Please search the archives.

  Nico

Le 21/03/2007 13:45, Poyner, Brandon écrivait  :
> 
> I'm going to attempt a similar setup here shortly, just waiting on the
> hardware.  I found an article while researching the idea, but it
> somewhat leaves the high availability question unresolved.  I'd also be
> interested to hear of any other Xen + DRBD HA implementations.
> 
> http://www.gridvm.org/drbd-lvm-gnbd-and-xen-for-free-and-reliable-san.ht
> ml
> 
> 
> Brandon Poyner
> Network Engineer III
> CCAC - College Office
> 412-237-3086
>  
> 
> > -----Original Message-----
> > From: drbd-user-bounces at linbit.com 
> > [mailto:drbd-user-bounces at linbit.com] On Behalf Of dd8ne at web.de
> > Sent: Wednesday, March 21, 2007 12:01 PM
> > To: drbd-user at linbit.com
> > Subject: [DRBD-user] Cheap HA Cluster
> > 
> > Hello,
> > 
> > I'm thinking about a cheap HA Cluster for serving XEN DomU domains.
> > 
> > That's what I'm thinking of:
> > 
> > 
> > *-----------------------*                           
> > *-----------------------*
> > |        Server1        |                           |       
> > Server2         |
> > |          Xen          |prim                   prim|         
> > Xen           |
> > |                   GFS |---------| DRBD8 |---------| GFS     
> >               |
> > |VM1                    |                           |         
> >            VM3|
> > |VM2                    |                           |         
> >            VM4|
> > *-----------------------*                           
> > *-----------------------*
> > 
> > Has anybody got working such a cluster?
> > 
> > I run in problems, using LVM on DRBD as I can not switch to 
> > secondary as soon
> > as I've done a vgchange -aly or CLVMD was started as "Device 
> > is held opened by 
> > someone". So I ran into a Split-Brain situation for each 
> > reboot. My solution: 
> > using a 'normal' partition for drbd. 
> > 
> > 
> > 
> > So far, I'm able to do live migration between the servers, 
> > using image files
> > on the drbd GFS partition. ... Not so bad ...
> > 
> > Any hints for getting working (C)LVM?
> > 
> > Oh yes... I'm using CentOS5 beta and DRBD 8.0.1
> > 
> >  
> > Hans-Joachim
> >  
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-- 
Nicolas Bouthors -=- Tel : 06 20 71 62 34 -=- Fax : 01 46 87 21 99
NBi SARL -=- http://nbi.fr -=- nbouthors at nbi.fr
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-- 
James Vanns
Systems Programmer
Framestore CFC Ltd.