Hi
On Fri, Jun 28, 2019, 17:54 Marcus Schopen <lists@xxxxxxxxxxxx> wrote:
Hi,
does anyone have experience with gluster in KVM environments? I would
like to hold qcow2 images of a KVM host with a second KVM host in sync.
Unfortunately, shared storage is not available to me, only the
two KVM hosts. In principle, it would be sufficient for me - in case of
a failure of the first KVM host - to start the guests on the second
host by hand without restoring the images from the nightly backup
first. The question is, is glusterfs a sensible solution here or
should one better use other approaches e.g. DRBD. I have read
contradictory statements about this, many advise against using gluster
for qcow2 images, some report no problems at all.
Redhat uses gluster in its RHEV solution. Ovirt is the open source one. Thus gluster can be used with good results. You will need a 10G network for the gluster storage for higher performance and enable sharding on the shared volume. Two node setups are prone to split brain issues which may cause headaches. I am running such setups for years and encountered few splits which i was able to recover from. You need some fencing solution inplace to minimize such issues. I would expect higher performance from DRBD, though I am not aware of any GUI solution that simplifies its management.
Cheers
Marcus
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