[Pacemaker] stonith q

Alex Samad - Yieldbroker Alex.Samad at yieldbroker.com
Sun Nov 2 15:47:22 EST 2014

> -----Original Message-----
> From: Digimer [mailto:lists at alteeve.ca]
> Sent: Monday, 3 November 2014 3:26 AM
> To: The Pacemaker cluster resource manager; Alex Samad - Yieldbroker
> Subject: Re: [Pacemaker] stonith q
> On 02/11/14 06:45 AM, Andrei Borzenkov wrote:
> > В Sun, 2 Nov 2014 10:01:59 +0000
> > Alex Samad - Yieldbroker <Alex.Samad at yieldbroker.com> пишет:
> >
> >>
> >>
> >>> -----Original Message-----
> >>> From: Digimer [mailto:lists at alteeve.ca]
> >>> Sent: Sunday, 2 November 2014 9:49 AM
> >>> To: The Pacemaker cluster resource manager
> >>> Subject: Re: [Pacemaker] stonith q
> >>>
> >>> On 01/11/14 06:27 PM, Alex Samad - Yieldbroker wrote:
> >>>> Hi
> >
> > That hardly makes sense except in pure test environment. Stonith is
> > needed when you do not know state of partner node, in which case you
> > cannot be sure your reboot/shutdown command will be executed, nor that
> > you can reach your partner at all.
> >
> > If you are running under Vmware, use stonith/vmware or stonith/vcenter.
> Andrei is correct. A stonith method must be external to the node and work
> regardless of the state of a node. Try this; 'echo c > /proc/sysrq-trigger' will
> crash the node. Any stonith method that requires the OS to respond will fail
> and your cluster will hang.

Yes but vmware will restart the node in that circumstance.
I have had issues with my 2 node cluster where 1 node will remove itself because of lack of communication. Very hard to track down when it happens every now and then and only at 1am, I believe because of backup traffic or because its starved of cpu cycles.

What I would like to see happen in that situation if for a reboot to be issued, I know that the node would respond and I know that it would reconnect.

I read that there was a suicide option module that did what I wanted but its not available.

I don't want to setup useid for vmware for each node and configure that. I just want fenced to do a reboot via the os of the node instead of just killing cman 

What I am hearing is that its not available. Is it possible to hook to a custom script on that event, I can write my own restart

> --
> 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?

More information about the Pacemaker mailing list