This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] high availability iscsi and xen setup

To: Mark Adams <mark@xxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] high availability iscsi and xen setup
From: Thomas Halinka <lists@xxxxxxxxx>
Date: Thu, 04 Nov 2010 15:46:44 +0100
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 04 Nov 2010 07:48:10 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20101104125830.GA15851@xxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <20101104125830.GA15851@xxxxxxxxxxxxxxxxxx>
Reply-to: lists@xxxxxxxxx
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Hi Marc,

Am Donnerstag, den 04.11.2010, 12:58 +0000 schrieb Mark Adams:
> Hi All,
> I'm thinking about the best way to set this up, and would greatly
> appreciate your learned opinions on it. I'm thinking of the following:
> - 2 Storage servers, running LVM, heartbeat, drbd (primary/standy) and iscsi.
>   This will protect against 1 storage server failing.


> - 2 Xen hosts, running heartbeat to ensure the domU's are available. If
>   not, migrate all hosts on to other xen host. This will protect against
>   1 xen host failure.


> Any opinions on this arrangement of setup or links to resources
> discussing it would be much appreciated.

If ur interested i could provide a link to my wiki, which describes such
a setup

>  Also any alternative ways to
> provide the same HA would be useful for comparison.
> - Any Pitfalls? 

nope - works like a charm

> - Gaps in the availability? (split-brain possibilities?)

Im running 2 iSCSI-Linux-Targets with a bunch of XEN-Boxes...

> - How would you add in additional xen hosts? would they always need to be
> paired in this arrangement (1 fails over to the other..)

No need for pairing. Just use hb2 with crm and udev for static
> - Is a clustered filesystem required?

NOT required, but im testing another kind of such a setup. My receipt is
to run XEN-Boxes with glusterfs as filebases-Diskbackend...


first tests were impressive and performance was higher than iscsi, since
im running ~60VMs over 10GBit-Nics, where the iscsi-targets were the
bottleneck :-(

> Thanks in advance for any advice or opinions on this.
> Regards,
> Mark



> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

Xen-users mailing list