Re: can I attach a volume to 2 servers

[Sean Redmond <sean.redmond1@xxxxxxxxx>]

Hi,

You could set the below to create ephemeral disks as RBD's

[libvirt]

libvirt_images_type = rbd

On Mon, May 2, 2016 at 2:28 PM, yang sheng <forsaks.30@xxxxxxxxx> wrote:

Hi 

I am using ceph infernalis.

it works fine with my openstack liberty.

I am trying to test nova evacuate.

All the vms' volumes are shared among all compute nodes. however, the instance files (/var/lib/nova/instances) are in each compute node's local storage.

Based on redhat docs(https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/6/html/Administration_Guide/section-evacuation.html), nova evacuate require sync the instance files as well and they created a NFS cluster.

Since ceph is also shared among all nodes as well, I was thinking to create a volume in ceph and attach this volume to all compute nodes. 

just wondering is this doable?

(I have already attached this volume to 2 servers, server A and server B. If I write something in server A, seems it is not visible to server B. I have to re-attach the volume to server B so that server B can see it.)

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