[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

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



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.