[Users] Glusterfs HA doubts

[Tim Hildred]

Hey Adrian,

I'm jumping in now because you haven't had any nibbles yet, not because I know for sure I'm right. I only have something to say about the 3rd part of your email:

> 3) Mount dns resolution
> If you check Jason Brooks howto you will see that it uses a hostname
> for refering to nfs mount. If you want to perform HA you need your
> storage to be mounted and if the server1 host is down it doesn't
> help that the nfs mount point associated to the storage is
> server1:/vms/ and not server2:/vms/. Checking Middleswarth howto I
> think that he does the same thing.
> 
> Let's explain a bit more so that understand. My example setup is the
> one where you have two host machines where you run a set of virtual
> machines on one and the other one doesn't have any virtual machine
> running. Where is the virtual machines storage located? It's located
> at the glusterfs volume.
> 
> So the first one of the machines mounts the glusterfs volume as nfs
> (It's an example).
> If it uses its own hostname for the nfs mount then if itself goes
> down the second host isn't going to mount it when it's restarted in
> the HA mode.
> 
> So the first one of the machines mounts the glusterfs volume as nfs
> (It's an example).
> If it uses the second host hostname for the nfs mount then if the
> second host goes down the virtual machine cannot access its virtual
> disks.