7:33 p.m.
I'm working on upgrading an oVirt 3.5 setup. The physical hosts are
running CentOS 7, but the hosted engine is CentOS 6. The upgrade notes
are "back up the engine, upgrade/reinstall the OS, then restore", but I
can't see how to actually install CentOS 7 on the engine.
Am I supposed to re-run "hosted-engine --deploy"? Wouldn't that try to
re-register the physical hosts, or can I interrupt it to restore the
backup?
Or, is there a way to just attach an install ISO to the engine VM and
boot from that?
--
Chris Adams <cma(a)cmadams.net>
8:17 p.m.
On Wed, Feb 22, 2017 at 5:33 PM, Chris Adams <cma(a)cmadams.net> wrote:
I'm working on upgrading an oVirt 3.5 setup. The physical hosts
are
running CentOS 7, but the hosted engine is CentOS 6. The upgrade notes
are "back up the engine, upgrade/reinstall the OS, then restore", but I
can't see how to actually install CentOS 7 on the engine.
Am I supposed to re-run "hosted-engine --deploy"? Wouldn't that try to
re-register the physical hosts, or can I interrupt it to restore the
backup?
Or, is there a way to just attach an install ISO to the engine VM and
boot from that?
On 3.6 we release the engine also for el6 so for 3.5/el6 to 3.6/el6 you
have just to:
- set global maintenance mode,
- add the 3.6 repo to the engine VM,
- run yum update ovirt-*-setup* on the engine VM
- run engine-setup
- upgrade the host to 3.6 setting maintenance mode one host at a time
- raise the cluster compatibility level
Then ee have a specific helper utility for 3.6/el6 -> 4.0/el7:
https://www.ovirt.org/develop/release-management/features/hosted-engine-m...
--
Chris Adams <cma(a)cmadams.net>
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10:04 p.m.
Once upon a time, Simone Tiraboschi <stirabos(a)redhat.com> said:
Then ee have a specific helper utility for 3.6/el6 -> 4.0/el7:
https://www.ovirt.org/develop/release-management/features/hosted-engine-m...
Ahh, that looks better. I was looking at this:
https://www.ovirt.org/documentation/migration-engine-36-to-40/
which just kind of glosses over how to upgrade the OS. :)
I do usually use my custom CentOS install (rather than the appliance);
is there a way to do that?
Also, is it normally recommended to upgrade one major release at a time?
In other words, aside from the engine CentOS6->7 step, would upgrading
from 3.5 to 4.1 need to go through 3.6 and 4.0 along the way?
--
Chris Adams <cma(a)cmadams.net>
12:20 a.m.
On Wed, Feb 22, 2017 at 8:04 PM, Chris Adams <cma(a)cmadams.net> wrote:
Once upon a time, Simone Tiraboschi <stirabos(a)redhat.com>
said:
> Then ee have a specific helper utility for 3.6/el6 -> 4.0/el7:
> https://www.ovirt.org/develop/release-management/features/
hosted-engine-migration-to-4-0/
Ahh, that looks better. I was looking at this:
https://www.ovirt.org/documentation/migration-engine-36-to-40/
which just kind of glosses over how to upgrade the OS. :)
I do usually use my custom CentOS install (rather than the appliance);
is there a way to do that?
No, not with that flow and not in 4.1 at all.
ovirt-engine-appliance is basically just a centos VM plus ovirt-engine.
Once deployed you can tune it as you need.
Also, is it normally recommended to upgrade one major release at a time?
For the engine it's not just recommended, it's mandatory!
In other words, aside from the engine CentOS6->7 step, would
upgrading
from 3.5 to 4.1 need to go through 3.6 and 4.0 along the way?
--
Chris Adams <cma(a)cmadams.net>
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Users mailing list
Users(a)ovirt.org
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5:36 p.m.
Once upon a time, Simone Tiraboschi <stirabos(a)redhat.com> said:
On Wed, Feb 22, 2017 at 8:04 PM, Chris Adams <cma(a)cmadams.net>
wrote:
> Also, is it normally recommended to upgrade one major release at a time?
For the engine it's not just recommended, it's mandatory!
Ahh, I didn't realize that. I don't think I saw that in the
documentation (but maybe I just missed it?).
Thanks.
--
Chris Adams <cma(a)cmadams.net>
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