Ceph with VMWare / XenServer

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Hi,

yes, we use it in production. I can stop/kill the tgt on one server and XenServer goes to the second one. We enabled multipathing in xenserver. In our setup we haven't multiple ip-ranges so we scan/login the second target on xenserverstartup with iscsiadm in rc.local.

Thats based on history - we used Dell Equallogic before ceph came in and there was no need to use multipathing (only LACP-channels). No we enabled multipathing and use tgt, but without diffent ip-ranges.

Mit freundlichen Gr??en / Best Regards,
--
Consultant
Dipl.-Inf. Uwe Grohnwaldt
Gutleutstr. 351
60327 Frankfurt a. M.

eMail: uwe at grohnwaldt.eu
Telefon: +49-69-34878906
Mobil: +49-172-3209285
Fax: +49-69-348789069

----- Original Message -----
> From: "Andrei Mikhailovsky" <andrei at arhont.com>
> To: "Uwe Grohnwaldt" <uwe at grohnwaldt.eu>
> Cc: ceph-users at lists.ceph.com
> Sent: Montag, 12. Mai 2014 14:48:58
> Subject: Re: Ceph with VMWare / XenServer
> 
> 
> Uwe, thanks for your quick reply.
> 
> Do you run the Xenserver setup on production env and have you tried
> to test some failover scenarios to see if the xenserver guest vms
> are working during the failover of storage servers?
> 
> Also, how did you set up the xenserver iscsi? Have you used the
> multipath option to set up the LUNs?
> 
> Cheers
> 
> 
> 
> 
> ----- Original Message -----
> 
> From: "Uwe Grohnwaldt" <uwe at grohnwaldt.eu>
> To: ceph-users at lists.ceph.com
> Sent: Monday, 12 May, 2014 12:57:48 PM
> Subject: Re: Ceph with VMWare / XenServer
> 
> Hi,
> 
> at the moment we are using tgt with RBD backend compiled from source
> on Ubuntu 12.04 and 14.04 LTS. We have two machines within two
> ip-ranges (e.g. 192.168.1.0/24 and 192.168.2.0/24). One machine in
> 192.168.1.0/24 and one machine in 192.168.2.0/24. The config for tgt
> is the same on both machines, they export the same rbd. This works
> well for XenServer.
> 
> For VMWare you have to disable VAAI to use it with tgt
> (http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1033665)
> If you don't disable it, ESXi becomes very slow and unresponsive.
> 
> I think the problem is the iSCSI Write Same Support but I haven't
> tried which of the settings of VAAI is responsible for this
> behavior.
> 
> Mit freundlichen Gr??en / Best Regards,
> --
> Consultant
> Dipl.-Inf. Uwe Grohnwaldt
> Gutleutstr. 351
> 60327 Frankfurt a. M.
> 
> eMail: uwe at grohnwaldt.eu
> Telefon: +49-69-34878906
> Mobil: +49-172-3209285
> Fax: +49-69-348789069
> 
> ----- Original Message -----
> > From: "Andrei Mikhailovsky" <andrei at arhont.com>
> > To: ceph-users at lists.ceph.com
> > Sent: Montag, 12. Mai 2014 12:00:48
> > Subject: Ceph with VMWare / XenServer
> > 
> > 
> > 
> > Hello guys,
> > 
> > I am currently running a ceph cluster for running vms with qemu +
> > rbd. It works pretty well and provides a good degree of failover. I
> > am able to run maintenance tasks on the ceph nodes without
> > interrupting vms IO.
> > 
> > I would like to do the same with VMWare / XenServer hypervisors,
> > but
> > I am not really sure how to achieve this. Initially I thought of
> > using iscsi multipathing, however, as it turns out, multipathing is
> > more for load balancing and nic/switch failure. It does not allow
> > me
> > to perform maintenance on the iscsi target without interrupting
> > service to vms.
> > 
> > Has anyone done either a PoC or better a production environment
> > where
> > they've used ceph as a backend storage with vmware / xenserver? The
> > important element for me is to have the ability of performing
> > maintenance tasks and resilience to failovers without interrupting
> > IO to vms. Are there any recommendations or howtos on how this
> > could
> > be achieved?
> > 
> > Many thanks
> > 
> > Andrei
> > 
> > 
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users at lists.ceph.com
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> > 
> _______________________________________________
> ceph-users mailing list
> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 
> 


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