[Pacemaker] why does pacemaker execute fence action immediately when the target node becomes UNCLEAN?

[Digimer]

I suspect that, if you tested it, you would see that corosync fails over
to the second ring when the first ring's bond breaks/recovers. Same in
reverse. So you're protected against bond=!1 by that second layer of
redundancy.

In my testing, only mode=1 was able to fail and recover without failing
the totem ring.

On 01/02/2013 02:06 PM, Jake Smith wrote:
> 
> ----- Original Message -----
>> From: "Digimer" <lists at alteeve.ca>
>> To: "The Pacemaker cluster resource manager" <pacemaker at oss.clusterlabs.org>
>> Cc: "Lars Marowsky-Bree" <lmb at suse.com>
>> Sent: Wednesday, January 2, 2013 11:49:13 AM
>> Subject: Re: [Pacemaker] why does pacemaker execute fence action immediately when the target node becomes UNCLEAN?
>>
>> On 01/02/2013 07:17 AM, Lars Marowsky-Bree wrote:
>>> On 2012-12-20T15:36:45, bin chen <free2coder at gmail.com> wrote:
>>>
>>>> I have defined a fence resource ,and cloned it.But when a node
>>>> becomes
>>>> UNCLEAN(I disconneted its network),the fence action will be
>>>> executed
>>>> immediately.Is there a method to avoid it(for example,a network
>>>> tolerance
>>>> time for network flash time )?For if the network is not stable,
>>>>  I don`t want cluster nodes be fenced again and again.:)
>>>
>>> Increase the membership timeout of the underlying layer.
>>>
>>> And make the network more stable. (Bonding, etc.)
>>>
>>>
>>>
>>> Regards,
>>>     Lars
>>
>> To build on Lars' comments;
>>
>> "underlying layer" == corosync, which is tweaked in the corosync.conf
>> file. As for bonding, only use mode=1. The other modes don't
>> fail/recover fast enough.
> 
> Don't want to derail the main topic but aren't bonding modes 0 and 4 acceptable also?
> 
> Those are what my first/second rings use and I've had no problems (knock on wood)
> 
> Jake
> 
>>
>> cheers
>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a person
>> without
>> access to education?
>>
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> 
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-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?