[ovirt-devel] OVIRT-3.5-TEST-DAY-3: backup/restore and disaster recovery

[Simone Tiraboschi]

Hi,
today I had to test how to recover a broken system using backup/restore tool [1] or disaster recovery procedure [2].

Unfortunately I really had a lot of troubles just trying to setup my test environment so no good news on that side.

I was using two host: one for the engine, the other as an hypervisor.
Both with latest fedora 19 updates.

For a fault of mine I add oVirt 3.5 RC2 repository on the engine host but I forgot to do the same on the second host and it generates a lot of problems.

I installed the ovirt engine, release 3.5 RC2, on the first host and from the web admin UI I was trying to add the second host.

I discovered that using jsonrpc mode it doesn't check/enforce or at least advice about cluster compatibility level failing silently. I opened a bug for that [3].
Than I start using xmlrpc mode that suggested me to downgrade the cluster compatibility mode to 3.3; I did that but it still failed adding my host apparently due to SELinux or Gluster errors; I opened a bug also for that [4].

So I understood that I forgot to add oVirt 3.5 repo on the second host; I opened a bug against host-deploy with install rpms but doesn't handle RPM repos. On my opinion it would make the setup more user friendly or at least more controllable for us [5].

So I added the yum repository and I tried again; I noticed that host-deploy upgrades vdsm stuff but it wasn't enough to get 3.5 compatibility level so, investigating it a bit, I noticed that host-deploy upgrades vdsm stuff but completely ignores libvirt one generating a nonworking setup; I opened a bug also for that [6].

At the end, after manually upgrade libvirt rpms I was able to add my host.

Than I briefly tested backup/restore and disaster recovery procedures which seam to work as expected.

So, at the end, on my opinion we have still to work a bit more to make the setup more user friendly.


Simone


[1] http://www.ovirt.org/Ovirt-engine-backup 
[2] http://www.ovirt.org/Features/ImportStorageDomain#Disaster_Recovery_flows
[3] https://bugzilla.redhat.com/show_bug.cgi?id=1142945
[4] https://bugzilla.redhat.com/show_bug.cgi?id=1142941
[5] https://bugzilla.redhat.com/show_bug.cgi?id=1142953
[6] https://bugzilla.redhat.com/show_bug.cgi?id=1142959