Re: [ovirt-users] Can HA Agent control NFS Mount?
On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)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@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@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)
For 1. I was wondering if perhaps, we could have an option to specify
the mount options. If I understand correctly, applying a soft mount
instead of a hard mount would prevent this from happening. I'm however
not sure of the implications this would have on the data integrity..
I would really like to see it happen in the ha-agent, as it's the one
which connects/mounts the storage it should also unmount it on boot.
However the stability on it, is flaky at best. I've noticed if `df`
hangs because of another NFS mount having timed-out the agent will
die. That's not a good sign.. this was what actually caused my
hosted-engine to run twice in one case.
Thanks,
Bob
> I think wdmd or sanlock are causing the reboot instead of poweroff
>
> Joop
>
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