[Pacemaker] A demand to the process trouble.(OpenAIS/Corosync and Pacemaker)

[Andrew Beekhof]

2009/7/17  <renayama19661014 at ybb.ne.jp>:
> Hi Andrew,
>
>> What do you mean by monitor here?
>> Do you mean that pacemaker would no longer detect if those two processes died?
>
> This monitor means the monitor of the resource.
> When these processes fall, the monitor of the resource of lrmd/stonithd stops.
> For example, the monitor of external/ssh and pgsql stops.
>
>> Do you mean the way heartbeat behaves with "crm on" instead of "crm respawn" ?
>
> I do not understand this meaning well.

That makes two of us :-)
I'm not sure I really understand the problem here.

If the crmd dies, then I (IIRC) the lrmd cancels all existing resource
monitoring.
However, when the crmd is recovered, it should setup the resource
monitoring again.

Is the second part not happening?

>
> I think that the following approach is necessary.
>
> 1) When a process related to a monitor fell, a system reboots.(Emergency Reboot)

Thats the lazy way out.

> 2) When a process related to a monitor fell, a monitor does not stop even if it reboot.
>
> The first approach thinks that realization is simple.
>
> Best Regards,
> Hideo Yamauchi.
>
> --- Andrew Beekhof <andrew at beekhof.net> wrote:
>
>> On Fri, Jul 17, 2009 at 3:34 AM, <renayama19661014 at ybb.ne.jp> wrote:
>> > Hi,
>> >
>> > We began shift investigation to the combination of Pacemaker and corosync/openais now.
>> >
>> > We put Pacemaker and openais(whitetank) together and confirmed movement at the time of the
>> process
>> > trouble.
>> > (This is the function that a reboot emergency occurred by a combination with Heartbeat.)
>> >
>> > I let a process of Pacemaker break down. (kill -9 pid)
>> > The following behavior was seen then.
>> >
>> > * When crmd reboots on ACT node(Not DC), the monitor of the lrmd resource stops.
>> >  And the monitor of the stonnith resource stops.
>>
>> What do you mean by monitor here?
>> Do you mean that pacemaker would no longer detect if those two processes died?
>>
>> > * When stonithd reboots on ACT node(Not DC), the monitor of the stonnith resource stops.
>> > * When crmd reboots on STB node(DC), the monitor of the stonnith resource stops.
>> > * When pengine reboots on STB node(DC), the monitor of the stonnith resource stops.
>> > * And more....
>> >
>> > We feel a problem for the stop of the monitor after the process reboot.
>> > When we combined openais/corosync, we hope a function such as the urgent reboot of Heartbeat
>> to be
>> > included.
>>
>> Do you mean the way heartbeat behaves with "crm on" instead of "crm respawn" ?
>> >
>> > Best Regards,
>> > Hideo Yamauchi.
>> >
>> >
>> > _______________________________________________
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>> > Pacemaker at oss.clusterlabs.org
>> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>> >
>>
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>
>
>
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