[ovirt-users] Upgrade from 3.6 to 4.1

[Arman Khalatyan]

Before upgrade make shure that epel is disabled, there are some conflicts
in collectd package.


On Fri, Mar 24, 2017 at 11:51 AM, Christophe TREFOIS <
christophe.trefois at uni.lu> wrote:

>
> On 23 Mar 2017, at 20:09, Brett Holcomb <biholcomb at l1049h.com> wrote:
>
> I am currently running oVirt 3.6 on a physical server using hosted engine
> environment.  I have one server since it's a lab setup.  The storage is on
> a Synology 3615xs iSCSI LUN so that's where the vms are.  I plan to upgrade
> to 4.1 and need to check to make sure I understand the procedure.  I've
> read the oVirt 4.1 Release Notes and they leave some questions.
>
> First they say I can simply install the 4.1 release repo update all the
> ovirt-*-setup* and then run engine-setup.
>
>
> I don’t know for sure, but I would first go to latest 4.0 and then to 4.1
> as I’m not sure they test upgrades from 3.6 to 4.1 directly.
>
>
> 1. I assume this is on the engine VM running on the host physical box.
>
>
> Yes, inside the VM. But first, follow the guide below and make sure engine
> is in global maintenance mode.
>
>
> 2.  What does engine-setup do.  Does it know what I have and simply update
> or do I have to go through setup again.
>
>
> You don’t have to setup from scratch.
>
>
> 3.  Then do I go to the host and update all the ovirt stuff?
>
>
> Yes, first putting host in local maintenance mode and removing global
> maintenance mode from engine.
>
>
> However, they then say for oVirt Hosted Engine follow a link for upgrading
> which takes me to a Not Found :( page but did have a link back to the
> release notes which link to the Not Found which....  So what do I need to
> know about upgrading a hosted engine setup that there are no directions
> for.  Are there some gotchas?  I thought that the release notes said I just
> had to upgrade the engine and then the host.
>
>
> @ovirt, can this be fixed ? It’s quite annoying indeed.
>
> Meanwhile, I usually follow the linke from 4.0.0 release notes which is
> not 404.
>
> https://www.ovirt.org/documentation/how-to/hosted-
> engine/#upgrade-hosted-engine
>
>
> Given that my VMs are on iSCSI what happens if things go bad and I have to
> start from scratch.  Can I import the VMs created under 3.6 into 4.1 or do
> I have to do something else like copy them somewhere for backup.
>
>
> It might be good to shutdown the VMs and do an export if you have a
> storage domain for that. Just to be 100 % safe.
> In any case, during the upgrade, since the host is in maintenance, all VMs
> have to be OFF.
>
>
> Any other hints and tips are appreciated.
>
>
> Don’t have iSCSI so can’t help much with that.
> I’m just a regular user who failed many times :)
>
>
> Thanks.
>
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