Red Hat Bugzilla – Bug 1015724
Add maintenance mode to hosted engine agent
Last modified: 2016-06-12 19:16:39 EDT
Maintenance mode is needed in the hosted engine agent to enable admins to work on the engine VM without possible interference from the agent. This mode will instruct the agent to ignore the engine VM, whether running or not, and to not stop it, start it, or migrate it.
Support will first be added for the agent to recognize a maintenance flag located in block 0 in the shared metadata, as well as a method in the client api allowing the flag to be set by other python programs such as the hosted-engine tool.
Merged the following:
Please provide in what version it included and also how I can to activate maintenance mode?
(In reply to Artyom from comment #3)
> Please provide in what version it included and also how I can to activate
> maintenance mode?
This will need a new vdsm build, which reports the HA score to the engine.
(In reply to Doron Fediuck from comment #4)
> (In reply to Artyom from comment #3)
> > Please provide in what version it included and also how I can to activate
> > maintenance mode?
> This will need a new vdsm build, which reports the HA score to the engine.
Should be in next build.
Checked on ovirt-hosted-engine-ha-0.1.0-0.5.1.beta1.el6ev.noarch
1) set maintenance mode to local - put engine vm down and also set host score to 0, also I can see in log Local HA maintenance enabled
2) set maintenance mode to global - the same as local, just in log Global HA maintenance enabled
so after enable maintenance mode enabled I can't connect to engine vm(via ssh, it's really in down mode), so I don't think that it desired behavior, how I understand from description.
Also it's not bad to give some more explicit information about states(local, global) and what desired behavior for each state, for correct verification of bug.
Created attachment 821436 [details]
agent and vdsm logs for local maintenance state
(In reply to Artyom from comment #6)
> Checked on ovirt-hosted-engine-ha-0.1.0-0.5.1.beta1.el6ev.noarch
> 1) set maintenance mode to local - put engine vm down and also set host
> score to 0, also I can see in log Local HA maintenance enabled
This seems right.
> 2) set maintenance mode to global - the same as local, just in log Global HA
> maintenance enabled
> so after enable maintenance mode enabled I can't connect to engine vm(via
> ssh, it's really in down mode), so I don't think that it desired behavior,
> how I understand from description.
Which maintenance mode? For local, the vm is expected to go down. For global, the vm is expected to stay in its current state on its current host (i.e. the user assumes complete control of the vm during global maintenance).
> Also it's not bad to give some more explicit information about states(local,
> global) and what desired behavior for each state, for correct verification
> of bug.
Can you take a look at  to see if it answers your questions? I'll set this bug to modified for now, and we can go from there. Thanks.
Thank for documentation it was useful, maintenance mode work correct:
1) maintenance local mode - put vm down, and set score of host where vm was to 0, after this ha agent start vm on second host
2) global maintenance mode - vm in up state, but ha not try to migrate or start vm(stoped vm manually), host score stay 2400, after return to maintenance none mode, ha start vm on old host.
So you can change status to on_qa and I will verified it.
Sorry for misunderstanding about local state, I was thinking that maintenance mode need for working on vm without interrupt from ha, but local mode is for working on host.
(In reply to Artyom from comment #9)
> So you can change status to on_qa and I will verified it.
Verified on ovirt-hosted-engine-ha-0.1.0-0.5.1.beta1.el6ev.noarch
This bug is currently attached to errata RHEA-2013:15591. If this change is not to be documented in the text for this errata please either remove it from the errata, set the requires_doc_text flag to
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Thanks in advance.
ovirt-hosted-engine-ha is a new package; does not need errata for bugs during its development.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.