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

[Martin Sivak]

Hi,

global maintenance is meant for completely manual changes where all
logic needs to be disabled. That includes maintenance migrations.

You should exit global maintenance and put just the single host to
local maintenance. Preferably using the webadmin UI (Management /
Maintenance). That will migrate all VMs away (including hosted engine
if it runs there) and disconnect all storage domains.

This might be tricky if all you have is just a single host.

Best regards

--
Martin Sivak
SLA / oVirt

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?
>
> Thanks,
> Gianluca
>
>
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