[ovirt-users] Glusterfs HA with Ovirt

Fri Jul 4 01:26:43 EDT 2014

Hi Andrew,

Yes..both on the same node...but i have 4 nodes of this type in the same
cluster....So it should work or not ??

1. 4 physical nodes with 12 bricks each(distributed replicated)...
2. The same all 4 nodes use for the compute purpose also...

Do i still require the VIP...or not ?? because i tested even the mount
point node goes down...the VM will not pause and not affect...

On Fri, Jul 4, 2014 at 1:18 PM, Andrew Lau <andrew at andrewklau.com> wrote:

> Or just localhost as your computer and storage are on the same box.
>
>
> On Fri, Jul 4, 2014 at 2:48 PM, Punit Dambiwal <hypunit at gmail.com> wrote:
> > Hi Andrew,
> >
> > Thanks for the update....that means HA can not work without VIP in the
> > gluster,so better to use the glusterfs with the VIP to take over the
> ip...in
> > case of any storage node failure...
> >
> >
> > On Fri, Jul 4, 2014 at 12:35 PM, Andrew Lau <andrew at andrewklau.com>
> wrote:
> >>
> >> Don't forget to take into consideration quroum, that's something
> >> people often forget
> >>
> >> The reason you're having the current happen, is gluster only uses the
> >> initial IP address to get the volume details. After that it'll connect
> >> directly to ONE of the servers, so with your 2 storage server case,
> >> 50% chance it won't go to paused state.
> >>
> >> For the VIP, you could consider CTDB or keepelived, or even just using
> >> localhost (as your storage and compute are all on the same machine).
> >> For CTDB, checkout
> >> http://community.redhat.com/blog/2014/05/ovirt-3-4-glusterized/
> >>
> >> I have a BZ open regarding gluster VMs going into paused state and not
> >> being resumable, so it's something you should also consider. My case,
> >> switch dies, gluster volume goes away, VMs go into paused state but
> >> can't be resumed. If you lose one server out of a cluster is a
> >> different story though.
> >> https://bugzilla.redhat.com/show_bug.cgi?id=1058300
> >>
> >> HTH
> >>
> >> On Fri, Jul 4, 2014 at 11:48 AM, Punit Dambiwal <hypunit at gmail.com>
> wrote:
> >> > Hi,
> >> >
> >> > Thanks...can you suggest me any good how to/article for the glusterfs
> >> > with
> >> > ovirt...
> >> >
> >> > One strange thing is if i will try both (compute & storage) on the
> same
> >> > node...the below quote not happen....
> >> >
> >> > ---------------------
> >> >
> >> > Right now, if 10.10.10.2 goes away, all your gluster mounts go away
> and
> >> > your
> >> > VMs get paused because the hypervisors can’t access the storage. Your
> >> > gluster storage is still fine, but ovirt can’t talk to it because
> >> > 10.10.10.2
> >> > isn’t there.
> >> > ---------------------
> >> >
> >> > Even the 10.10.10.2 goes down...i can still access the gluster mounts
> >> > and no
> >> > VM pause....i can access the VM via ssh...no connection
> failure.....the
> >> > connection drop only in case of SPM goes down and the another node
> will
> >> > elect as SPM(All the running VM's pause in this condition).
> >> >
> >> >
> >> >
> >> > On Fri, Jul 4, 2014 at 4:12 AM, Darrell Budic
> >> > <darrell.budic at zenfire.com>
> >> > wrote:
> >> >>
> >> >> You need to setup a virtual IP to use as the mount point, most people
> >> >> use
> >> >> keepalived to provide a virtual ip via vrrp for this. Setup something
> >> >> like
> >> >> 10.10.10.10 and use that for your mounts.
> >> >>
> >> >> Right now, if 10.10.10.2 goes away, all your gluster mounts go away
> and
> >> >> your VMs get paused because the hypervisors can’t access the storage.
> >> >> Your
> >> >> gluster storage is still fine, but ovirt can’t talk to it because
> >> >> 10.10.10.2
> >> >> isn’t there.
> >> >>
> >> >> If the SPM goes down, it the other hypervisor hosts will elect a new
> >> >> one
> >> >> (under control of the ovirt engine).
> >> >>
> >> >> Same scenarios if storage & compute are on the same server, you still
> >> >> need
> >> >> a vip address for the storage portion to serve as the mount point so
> >> >> it’s
> >> >> not dependent on any one server.
> >> >>
> >> >> -Darrell
> >> >>
> >> >> On Jul 3, 2014, at 1:14 AM, Punit Dambiwal <hypunit at gmail.com>
> wrote:
> >> >>
> >> >> Hi,
> >> >>
> >> >> I have some HA related concern about glusterfs with Ovirt...let say i
> >> >> have
> >> >> 4 storage node with gluster bricks as below :-
> >> >>
> >> >> 1. 10.10.10.1 to 10.10.10.4 with 2 bricks each and i have distributed
> >> >> replicated architecture...
> >> >> 2. Now attached this gluster storge to ovrit-engine with the
> following
> >> >> mount point 10.10.10.2/vol1
> >> >> 3. In my cluster i have 3 hypervisior hosts (10.10.10.5 to
> 10.10.10.7)
> >> >> SPM
> >> >> is on 10.10.10.5...
> >> >> 4. What happen if 10.10.10.2 will goes down.....can hypervisior host
> >> >> can
> >> >> still access the storage ??
> >> >> 5. What happen if SPM goes down ???
> >> >>
> >> >> Note :- What happen for point 4 &5 ,If storage and Compute both
> working
> >> >> on
> >> >> the same server.
> >> >>
> >> >> Thanks,
> >> >> Punit
> >> >> _______________________________________________
> >> >> Users mailing list
> >> >> Users at ovirt.org
> >> >> http://lists.ovirt.org/mailman/listinfo/users
> >> >>
> >> >>
> >> >
> >> >
> >> > _______________________________________________
> >> > Users mailing list
> >> > Users at ovirt.org
> >> > http://lists.ovirt.org/mailman/listinfo/users
> >> >
> >
> >
>
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