Re: Mounting Ceph RBD image to XenServer 7 as SR

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Hi Jake,

I will give that a try and see if that helps, thank you!

Yes I have that open in a browser tab, it gave me the idea of using ceph-deploy to install on the xenserver.

I will update with the results.

Cheers,
Mike
On Jun 30, 2016, at 12:42 PM, Jake Young <jak3kaj@xxxxxxxxx> wrote:

Can you install the ceph client tools on your server?  They may give you a more obvious error. Try to install the package and config/keys manually instead of with ceph-deploy. 


Jake


On Thursday, June 30, 2016, Mike Jacobacci <mikej@xxxxxxxxxx> wrote:
Hi Jake,

Interesting… XenServer 7 does has rbd installed but trying to map the rbd image with this command:

# echo {ceph_monitor_ip} name={ceph_admin},secret={ceph_key} {ceph_pool} {ceph_image} >/sys/bus/rbd/add

 It fails with just an i/o error… I am looking into now.  My cluster health is OK, so I am hoping I didn’t miss a configuration or something.


On Jun 29, 2016, at 3:28 PM, Jake Young <jak3kaj@xxxxxxxxx> wrote:



On Wednesday, June 29, 2016, Mike Jacobacci <mikej@xxxxxxxxxx> wrote:
Hi all,

Is there anyone using rbd for xenserver vm storage?  I have XenServer 7 and the latest Ceph, I am looking for the the best way to mount the rbd volume under XenServer.  There is not much recent info out there I have found except for this:

and this plugin (which looks nice):

I am looking for a way that doesn’t involve too much command line so other admins that don’t know Ceph or XenServer very well can work with it.  I am just curious what others are doing… Any help is greatly appreciated!

Cheers,
Mike

I'm not a XenServer user, so I can't help you there; but I feel your pain using Ceph for VMware storage. 

I'm surprised that any major Linux distributions haven't considered enabling rbd modules in initrd.

I can see having a tiny OS image containing not much more than grub and the boot kernel. The trick would be to find a way to manage the boot string in the grub conf on a large scale. 

Jake 


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