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Re: [Gluster-devel] Qemu glusterfs, exposing complete bricks instead of
From: |
Sander Eikelenboom |
Subject: |
Re: [Gluster-devel] Qemu glusterfs, exposing complete bricks instead of individual images as shared storage to VM's ? |
Date: |
Sat, 30 Nov 2013 00:46:20 +0100 |
Saturday, November 30, 2013, 12:32:50 AM, you wrote:
> On Fri, Nov 29, 2013 at 5:06 PM, Sander Eikelenboom <address@hidden> wrote:
>
> Hi,
>
> I'm using glusterfs for quite some time on my server for shared-storage to
> VM's.
> At the moment this had to go over tcp/ip bridge between host and guests, so
> i was interested in the option to use glusterfs directly with qemu. But it
> seems it
> only supports to expose individual images files that reside on a glusterfs
> brick.
>
> Would it be possible to extend this and make a complete brick available as
> disk to qemu as shared storage ?
> (so multiple vm's and the host can share this same storage space)
> Sounds like you want to use Gluster as a backing store for the VM images
> through qemu, but in addition, you probably want to mount a common glusterfs
> volume inside the vms as well. That's how you do it!
>
But that common glusterfs would be using tcp/ip then and not libgfapi or not ?
Could be i'm misreading the docs but specifying the image file seems mandatory:
Gluster drive specification in QEMU
drive file=gluster://server[:port]/volname/image[?transport=...]
And since using libgfapi should benefit performance by removing the necessity
to converting everything to networking packets and vice versa.
So it would be nice if i could do:
VM1 qemu:
drive file=gluster://server[:port]/volname
VM qemu:
drive file=gluster://server[:port]/volname
And that volume would be mountable in the VM (as a block device), don't know if
that would be easily possible
though since it probably is not a real normal block device.
> Cheers,
> James
>
>
> --
> Sander
>
>
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>
Re: [Gluster-devel] Qemu glusterfs, exposing complete bricks instead of individual images as shared storage to VM's ?, Niels de Vos, 2013/11/30