Hi,
On 10/13/2017 06:40 PM, Indivar Nair wrote:
Thanks Eric,
I want to keep a single VG so that I can get the bandwidth (LVM
Striping) of all the disks (PVs)
PLUS
the flexibility to adjust the space allocation between both LVs. Each
LV will be used by different departments. With 1 LV on different
hosts, I can distribute the Network Bandwidth too.
I would also like to take snapshots of each LV before backing up.
I have been reading more about CLVM+Pacemaker options.
I can see that it is possible to have the same VG activated on
multiple hosts for a GFSv2 filesystem.
In which case, it is the same PVs, VG and LV getting activated on all
hosts.
OK! It sounds reasonable.
In my case, we will have the same PVs and VG activated on both hosts,
but LV1 on Host01 and LV2 on Host02. I paln to use ext4 or XFS
filesystems.
Is there some possibility that it would work?
As said in the last mail, the new resource agent [4] will probably work
for you, but I didn't test this case yet. It's easy to have a try - the
RA is just shell
script, you can just copy LVM-activate to
/usr/lib/ocf/resource.d/heartbeat/ (assume you've installed
resource-agents package), and then configure
"clvm + LVM-activate" for pacemaker [5]. Please report back if it
doesn't work for you.
The LVM-activate RA is WIP. We are thinking if we should merge it into
the old LVM RA. So it may changes at any time.
[5]
https://www.suse.com/documentation/sle-ha-12/book_sleha/data/sec_ha_clvm_config.html
[1]
https://github.com/ClusterLabs/resource-agents/blob/master/heartbeat/clvm
<https://github.com/ClusterLabs/resource-agents/blob/master/heartbeat/clvm>
[2]
https://github.com/ClusterLabs/resource-agents/blob/master/heartbeat/LVM
<https://github.com/ClusterLabs/resource-agents/blob/master/heartbeat/LVM>
[3]
https://www.redhat.com/archives/linux-lvm/2017-January/msg00025.html
<https://www.redhat.com/archives/linux-lvm/2017-January/msg00025.html>
[4] https://github.com/ClusterLabs/resource-agents/pull/1040
<https://github.com/ClusterLabs/resource-agents/pull/1040>\
Eric
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