[ovirt-users] HostedEngine VM not visible, but running

[cmc]

I ran 'hosted-engine --vm-start' after trying to ping the engine and
running 'hosted-engine --vm-status' (which said it wasn't running) and
it reported that it was 'destroying storage' and starting the engine,
though it did not start it. I could not see any evidence from
'hosted-engine --vm-status' or logs that it started. By this point I
was in a panic to get VMs running. So I had to fire up the old bare
metal engine. This has been a very disappointing experience. I still
have no idea why the IDs in 'host_id' differed from the spm ID, and
why, when I put the cluster into global maintenance and shutdown all
the hosts, the Hosted Engine did not come up, nor any of the VMs. I
don't feel confident in this any more. If I try the deploying the
Hosted Engine again I am not sure if it will result in the same
non-functional cluster. It gave no error on deployment, but clearly
something was wrong.

I have two questions:

1. Why did the VMs (apart from the Hosted Engine VM) not start on
power up of the hosts? Is it because the hosts were powered down, that
they stay in a down state on power up of the host?

2. Now that I have connected the bare metal engine back to the
cluster, is there a way back, or do I have to start from scratch
again? I imagine there is no way of getting the Hosted Engine running
again. If not, what do I need to 'clean' all the hosts of the remnants
of the failed deployment? I can of course reinitialise the LUN that
the Hosted Engine was on - anything else?

Thanks

On Fri, Jun 30, 2017 at 4:30 PM, Denis Chaplygin <dchaplyg at redhat.com> wrote:
> Hello!
>
> On Fri, Jun 30, 2017 at 4:19 PM, cmc <iucounu at gmail.com> wrote:
>>
>> Help! I put the cluster into global maintenance, then powered off and
>> then on all of the nodes I have powered off and powered on all the
>> nodes. I have taken it out of global maintenance. No VM has started,
>> including the hosted engine. This is very bad. I am going to look
>> through logs to see why nothing has started. Help greatly appreciated.
>
>
> Global maintenance mode turns off high availability for the hosted engine
> vm. You should either cancel global maintenance or start vm manually with
> hosted-engine --vm-start
>
> Global maintenance was added to allow manual maintenance of the engine VM,
> so in that mode state of the engine VM and engine itself is not managed and
> you a free to stop engine or vm or both, do whatever you like and hosted
> engine tools will not interfere. Obviously when engine VM just dies while
> cluster is in global maintenance (or all nodes reboot, as in your case)
> there is no one to restart it :)