[ovirt-users] Self hosted engine and upgrade path to 3.6.1 CentOS 7.2 with single host

[Yedidyah Bar David]

On Sun, Dec 20, 2015 at 11:44 AM, Gianluca Cecchi
<gianluca.cecchi at gmail.com> wrote:
> On Sun, Dec 20, 2015 at 10:21 AM, Yedidyah Bar David <didi at redhat.com>
> wrote:
>>
>>
>> >
>> > After reboot and exiting maintenance I found the hosted_storage domain
>> > in
>> > state "unattached" and not "maintenance" as in another test I have done
>> > (note that in in that test there were not true data domains configured
>> > apart
>> > the hosted_storage...)
>> > I also got some exceptions inside the GUI when going into storage tab on
>> > hosted_storage line. See:
>> >
>> > https://drive.google.com/file/d/0BwoPbcrMv8mvYmdQYVM0dkRJaGM/view?usp=sharing
>> >
>> > Uncaught exception occurred. Please try reloading the page. Details:
>> > (TypeError) __gwt$exception: <skipped>: c is null
>> >
>> > I tried to attach the hosted_storage but then the engine VM went down
>>
>> It must have already been attached, because otherwise the engine vm would
>> not be up. So it might be some inconsistency between the engine and host.
>>
>> > I did wait for about 10 minutes and the VM was not restarted.
>>
>> Can you check/post ha logs (/var/log/ovirt-hosted-engine-ha)?
>>
>> Adding Martin.
>>
>
>
> here they are in tgz format. Contents for all yesterday and up to now:
> drwxr-xr-x root/root         0 2015-12-20 10:25 logs/
> -rw-r--r-- root/root   5557044 2015-12-20 10:25 logs/agent.log
> -rw-r--r-- root/root  11934533 2015-12-20 10:25 logs/agent.log.2015-12-18
> -rw-r--r-- root/root   4510074 2015-12-20 10:25 logs/broker.log
> -rw-r--r-- root/root   9867696 2015-12-20 10:25 logs/broker.log.2015-12-18
>
> https://drive.google.com/file/d/0BwoPbcrMv8mvTEh2bGplZEw2ZmM/view?usp=sharing
>
> Take in mind that starting from both host and engine in 3.6.0 yesterday at
> 13:30 the engine was updated to 3.6.1.
> After solving its problems (see
> http://lists.ovirt.org/pipermail/users/2015-December/036678.html ) at about
> 23:50 I also updated host as suggested taking it to CentOS 7.2 and 3.6.1
> too.
>
>
>>
>> > Is there any reason for ithe environment  to "automatically" go back
>> > into
>> > maintenance?
>> > Because as soon as I run again the command
>> >
>> > hosted-engine --set-maintenance --mode=none
>> >
>> > the engine VM was started again.....
>>
>> No idea, Martin?
>>
>> > Is there any command to see the current state of maintenance
>> > (none/local/global)?
>>
>> hosted-engine --vm-status
>>
>
> Thanks.
> BTW: what is the meaning of "score" field, passing from 3400 to 0 whn I put
> host to maintenance?
> Is the score related to priority to run engine VM among hosts (in my case
> only one)?

Yes.

You might want to have a look at [1], especially page 15. I can only find
a link to it at [2], perhaps we should link elsewhere too (e.g. howto page).

[1] https://www.ovirt.org/images/d/d5/Fosdem-hosted-engine.pdf
[2] http://www.ovirt.org/FOSDEM_2014

>
>>
>> >
>> > Inside the webadmin gui  in hosts tab I still see the icon indicating
>> > "update available" for it
>> > And in action items: "a new version is available" message
>> >
>> > In software subtab the host is detected as:
>> > OS Version: RHEL - 7 - 2.1511.el7.centos.2.10
>> > Kernel Version: 3.10.0 - 327.3.1.el7.x86_64
>> > KVM Version: 2.3.0 - 31.el7_2.4.1
>> > LIBVIRT Version: libvirt-1.2.17-13.el7_2.2
>> > VDSM Version: vdsm-4.17.13-0.el7.centos
>> > SPICE Version: 0.12.4 - 15.el7
>> > CEPH Version: librbd1-0.80.7-3.el7
>>
>> Are you sure the engine even manages to speak to the host?
>> Please check/post also engine and vdsm logs.
>>
>> Adding Oved.
>> --
>> Didi
>
>
> WHat do you mean by "the engine even manages to speak to the host"?
> After both updated to 3.6.1 I was indeed able to power on 2 machines defined
> in the DC and connect to their consoles, so I think there is
> communication...

Sounds so.

> Or do you mean particular communication in terms of what upadates are in
> place? What kind of check makes the engine when it shows "update available"
> fr the host?

No, I meant the above. Now really adding Oved...
-- 
Didi