[ovirt-users] Can HA Agent control NFS Mount?

[Andrew Lau]

On Fri, Jun 6, 2014 at 1:09 PM, Bob Doolittle <bob at doolittle.us.com> wrote:
> Thanks Andrew, I'll try this workaround tomorrow for sure. But reading
> though that bug report (closed not a bug) it states that the problem should
> only arise if something is not releasing a sanlock lease. So if we've
> entered Global Maintenance and shut down Engine, the question is what's
> holding the lease?
>
> How can that be debugged?

For me it's wdmd and sanlock itself failing to shutdown properly. I
also noticed even when in global maintenance and the engine VM powered
off there is still a sanlock lease for the
/rhev/mnt/....hosted-engine/? lease file or something along those
lines. So the global maintenance may not actually be releasing that
lock.

I'm not too familiar with sanlock etc. So it's like stabbing in the dark :(

>
> -Bob
>
> On Jun 5, 2014 10:56 PM, "Andrew Lau" <andrew at andrewklau.com> wrote:
>>
>> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob at doolittle.us.com>
>> wrote:
>> >
>> > On 05/25/2014 02:51 PM, Joop wrote:
>> >>
>> >> On 25-5-2014 19:38, Bob Doolittle wrote:
>> >>>
>> >>>
>> >>> Also curious is that when I say "poweroff" it actually reboots and
>> >>> comes
>> >>> up again. Could that be due to the timeouts on the way down?
>> >>>
>> >> Ah, that's something my F19 host does too. Some more info: if engine
>> >> hasn't been started on the host then I can shutdown it and it will
>> >> poweroff.
>> >> IF engine has been run on it then it will reboot.
>> >> Its not vdsm (I think) because my shutdown sequence is (on my f19
>> >> host):
>> >>  service ovirt-agent-ha stop
>> >>  service ovirt-agent-broker stop
>> >>  service vdsmd stop
>> >>  ssh root at engine01 "init 0"
>> >> init 0
>> >>
>> >> I don't use maintenance mode because when I poweron my host (= my
>> >> desktop)
>> >> I want engine to power on automatically which it does most of the time
>> >> within 10 min.
>> >
>> >
>> > For comparison, I see this issue and I *do* use maintenance mode
>> > (because
>> > presumably that's the 'blessed' way to shut things down and I'm scared
>> > to
>> > mess this complex system up by straying off the beaten path ;). My
>> > process
>> > is:
>> >
>> > ssh root at engine "init 0"
>> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
>> > hosted-engine --set-maintenance --mode=global
>> > poweroff
>> >
>> > And then on startup:
>> > hosted-engine --set-maintenance --mode=none
>> > hosted-engine --vm-start
>> >
>> > There are two issues here. I am not sure if they are related or not.
>> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just
>> > #2?)
>> > 2. The system reboot instead of poweroff (which messes up remote machine
>> > management)
>> >
>> > Thanks,
>> >      Bob
>> >
>> >
>> >> I think wdmd or sanlock are causing the reboot instead of poweroff
>>
>> While searching for my issue of wdmd/sanlock not shutting down, I
>> found this which may interest you both:
>> https://bugzilla.redhat.com/show_bug.cgi?id=888197
>>
>> Specifically:
>> "To shut down sanlock without causing a wdmd reboot, you can run the
>> following command: "sanlock client shutdown -f 1"
>>
>> This will cause sanlock to kill any pid's that are holding leases,
>> release those leases, and then exit.
>> "
>>
>> >>
>> >> Joop
>> >>
>> >> _______________________________________________
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>> >> http://lists.ovirt.org/mailman/listinfo/users
>> >
>> >
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