[Linux-HA] How stonith works
fengyandong at nrchpc.ac.cn
Thu Oct 15 09:18:29 MDT 2009
I will do it tomorrow morning.
On Thu, Oct 15, 2009 at 10:49 PM, Dejan Muhamedagic <dejanmm at fastmail.fm>wrote:
> On Thu, Oct 15, 2009 at 10:08:46PM +0800, fengyandong wrote:
> > I enable CRM.
> > I see the information from the ha-log that the passive node will attempt
> > stonith the active node, but it will ask other node to stonith the active
> > node if it fails to stonith the active node within 2 minutes.
> It doesn't ask the other node specifically, but broadcasts the
> fencing request in hope that another node from the cluster may
> stonith the offending node.
> > When the power
> > cables of the active node pushed back and the active node starts
> > successfully, the stonith service on the passive node is stopped and
> > stonithes the passive node.
> That's strange. Can't recall seeing that. If it happens, then
> please file a bugzilla and attach hb_report.
> > On Thu, Oct 15, 2009 at 9:42 PM, Alex Dean <adean at meteostar.com> wrote:
> > >
> > > On Oct 15, 2009, at 8:29 AM, fengyandong wrote:
> > >
> > > > Yes, if the power of the node is pulled out, the stonith device
> > > > can not
> > > > work.
> > >
> > > I'm using iLO2 as my stonith device, which relies on the power of the
> > > host machine. When pulling the power cables of the primary node, I've
> > > observed that the secondary node will attempt to stonith the primary
> > > node. This fails because iLO2 also loses power when the host's power
> > > is cut. The secondary node will retry indefinitely until stonith
> > > succeeds, and will not become primary until then. When I restore
> > > power to the old primary, it is reset by the secondary, and the
> > > secondary then proceeds to start resources.
> > >
> > > alex
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> > >
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