[ovirt-users] oVirt 4.1 not possible to set local maintenance on single host

[Simone Tiraboschi]

On Thu, Apr 20, 2017 at 12:12 PM, Gianluca Cecchi <gianluca.cecchi at gmail.com
> wrote:

> Hello,
> I have a single host test environment on 4.1.0 with hosted engine VM.
>
> I'm going to update to 4.1.1.
>
> Normally the workflow was:
>
> - put env in global maintenance
> - update engine part with engine-setup and such
> - update other os related packages of hosted engine VM
> - shutdown hosted engine vm
> - exit global maintenance
>
> Verify engine VM starts and all is ok form web admin gui.
> These steps above I have already done and now my engine vm has latest
> 4.1.1 setup.
>
> Now I want to proceed also with the only existing host part and I have
> already run:
>
> - shutdown all running VMs
> - put env in global maintenance
> - shutdown hosted engine vm
>
> Status is:
>
> [root at ractor ~]# hosted-engine --vm-status
>
>
> !! Cluster is in GLOBAL MAINTENANCE mode !!
>
>
>
> --== Host 1 status ==--
>
> conf_on_shared_storage             : True
> Status up-to-date                  : True
> Hostname                           : ractor.mydomain
> Host ID                            : 1
> Engine status                      : {"reason": "bad vm status", "health":
> "bad", "vm": "down", "detail": "down"}
> Score                              : 3400
> stopped                            : False
> Local maintenance                  : False
> crc32                              : 017f5635
> local_conf_timestamp               : 5595857
> Host timestamp                     : 5595835
> Extra metadata (valid at timestamp):
> metadata_parse_version=1
> metadata_feature_version=1
> timestamp=5595835 (Thu Apr 20 12:06:21 2017)
> host-id=1
> score=3400
> vm_conf_refresh_time=5595857 (Thu Apr 20 12:06:44 2017)
> conf_on_shared_storage=True
> maintenance=False
> state=GlobalMaintenance
> stopped=False
>
>
> !! Cluster is in GLOBAL MAINTENANCE mode !!
>
> [root at ractor ~]#
>
> Normally I set host into local maintenance now, but I receive this error:
>
> [root at ractor ~]# hosted-engine --set-maintenance --mode=local
> Unable to enter local maintenance mode: there are no available hosts
> capable of running the engine VM.
> [root at ractor ~]#
>
> [root at ractor ~]# ps -ef|grep [k]vm
> root       887     2  0 Feb14 ?        00:00:00 [kvm-irqfd-clean]
> [root at ractor ~]#
>
> Is this a bug or changed functionality?
>

Yes in the past it was possible, now it's explicitly prevented since the
engine VM couldn't be migrated or restart somewhere else:
https://bugzilla.redhat.com/show_bug.cgi?id=1394570


> Thanks,
> Gianluca
>
>
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