[ovirt-users] How to migrate Self Hosted Engine

[Gianluca Cecchi]

On Sun, Nov 20, 2016 at 4:08 PM, Yedidyah Bar David <didi at redhat.com> wrote:

>
>
> There is now an option for this in the gui, did you mark it? See also:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1167262
> --
> Didi
>

Ah.. I see.
In "New Host" window there is a section named "Hosted Engine" and it
defaults to "None" and I was give that..:

https://drive.google.com/file/d/0BwoPbcrMv8mvME9CVGFRLTB0b0k/view?usp=sharing

I didn't know it.
I have verified I was able to put one host into maintenance (the only one
running VM was automatically migrated) and then select "Reinstall" and in
the proposed window I select now "Deploy" in similar hosted engine section:
https://drive.google.com/file/d/0BwoPbcrMv8mvWTJMQXpwbHJYc00/view?usp=sharing

It seems ok now
[root at ovirt02 ~]# hosted-engine --vm-status


--== Host 1 status ==--

Status up-to-date                  : True
Hostname                           : ovirt01.localdomain.local
Host ID                            : 1
Engine status                      : {"health": "good", "vm": "up",
"detail": "up"}
Score                              : 3400
stopped                            : False
Local maintenance                  : False
crc32                              : 8e1ee066
Host timestamp                     : 429820
Extra metadata (valid at timestamp):
metadata_parse_version=1
metadata_feature_version=1
timestamp=429820 (Sun Nov 20 23:58:31 2016)
host-id=1
score=3400
maintenance=False
state=EngineUp
stopped=False


--== Host 2 status ==--

Status up-to-date                  : True
Hostname                           : 192.168.150.103
Host ID                            : 2
Engine status                      : {"reason": "vm not running on this
host", "health": "bad", "vm": "down", "detail": "unknown"}
Score                              : 3400
stopped                            : False
Local maintenance                  : False
crc32                              : 839f79f5
Host timestamp                     : 429736
Extra metadata (valid at timestamp):
metadata_parse_version=1
metadata_feature_version=1
timestamp=429736 (Sun Nov 20 23:58:37 2016)
host-id=2
score=3400
maintenance=False
state=EngineDown
stopped=False
[root at ovirt02 ~]#

Is it?
I was also able now to migrate the hosted engine vm to the second host and
to connect without problems to its console.
I'm going to change also the third host.

Two notes:
1) it would be nice to pre-filter the drop down box when you have to choose
the host where migrate the hosted engine...
So that if there are no hosts available you will be given a related message
without choice at all and if there is a subset of eligible hosts inside the
cluster, you will be proposed only to choose one of them and not all the
hosts inside the cluster.

2) If the gui option becomes the default and preferred way to deploy hosts
in self hosted engine environments I think it should be put in clearer
shape that if you follow the default action you would not have high
availability for the hosted engine vm.
Or changing the default action to "Deploy", or showing a popup if the
hosted engine vm has only one host configured for it but there are other
hosts in the cluster.
Just my opinion.

Thanks,
Gianluca
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