Re: [ovirt-users] Upgrade from CentOS 6.8 (oVirt 3.5) to CentOS 7 (oVirt 4.0)
On Mon, Aug 29, 2016 at 2:11 PM, Nir Soffer <nsoffer(a)redhat.com> wrote:
On Mon, Aug 29, 2016 at 3:06 PM, Fedele Stabile
<fedele.stabile(a)fis.unical.it> wrote:
> my ultimate goal would be to have a cluster with last version of Centos
> and oVirt,
> so my question is
> what are the best steps:
> first upgrade Centos of first upgrade oVirt?
You cannot upgrade ovirt on centos 6, since 3.5 is the last version
supporting it.
Best would be to upgrade the hypervisors to centos 7, which will
pull latest ovirt anyway.
> The ovirt-engine is hosted
Upgrading the hosted engine vm is not related and more delicate,
It should be possible using hosted engine setup.
Adding Simone to add more info on that.
On 4.0 we have a new --upgrade-appliance feature on hosted-engine-setup:
https://www.ovirt.org/develop/release-management/features/hosted-engine-m...
The tool will ask you to take a backup pf your engine DB with
engine-backup, then the tool will re-deploy a 4.0/el7 appliance
automatically injecting there the backup of your 3.6 engine.
The supported path is 3.6 -> 4.0 so you have also to do 3.5 -> 3.6 before that.
> Fedele
>
> Il giorno lun, 29/08/2016 alle 13.44 +0200, Fedele Stabile ha scritto:
>> ok,
>> I understand you suggest to upgrade centos 6.8 to 7.2 first
>> Correct?
I misread your question - you seems to already run centos 6.8.
I guess you are not using block storage (iSCSI/FC), do you?
Nir
>>
>> Il giorno lun, 29/08/2016 alle 14.38 +0300, Nir Soffer ha scritto:
>> >
>> > On Mon, Aug 29, 2016 at 2:15 PM, Fedele Stabile
>> > <fedele.stabile(a)fis.unical.it> wrote:
>> > >
>> > >
>> > > I would upgrade my CentOS 6.8 to 7 on my cluster of 5 ovirt nodes
>> > > (actually I'm running oVirt 3.5 and glusterfs 3.7).
>> > > Anyone has experienced troubles for this upgrade?
>> >
>> > Udev in 6.8 seems to be broken, breaking block storage.
>> > See https://access.redhat.com/solutions/2576511
>> >
>> > I would avoid this upgrade, or test it on one hypervisor and report
>> > ovirt bug.
>> >
>> > Upgrading to 3.6 or 4.0 and centos 7.2 is recommended.
>> >
>> > Nir
>> >
>>
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