On Mon, 2006-09-11 at 17:31 +0200, Riaan van Niekerk wrote: > Lon Hohberger wrote: > > On Fri, 2006-09-08 at 11:16 -0700, Rick Rodgers wrote: > >> Does anyone know of a good solution to providing good failover > >> for somthing like a Dell 1850? The issue here is that the power > >> souce plug in the back provides power for both the internal power > >> controller > >> and the node itself. So if you pull the cord it will not failover > >> because > >> it can not Stonith the failed node (power controller is down also). > > > > Generally, you can't handle this without external fencing. > > > > https://www.redhat.com/archives/linux-cluster/2006-September/msg00026.html > > > > -- Lon > > > > Lon - having reread that previous posting of yours, and esp the last > paragraph: > > +++ > (c) ... If a host does a "graceful shutdown" when > you fence it via IPMI, you need to disable ACPI on that host (e.g. boot > with acpi=off). The server should turn off immediately (or within 4-5 > seconds, like when holding an ATX power button in to force a machine > off). > ++++ > > Just so I am absolutely sure about this: Is the above the only scenario > when would have to disable ACPI? e.g. a graceful shutdown is easy to > spot. If I don't see one in the logs, that means I can leave ACPI on? Basically, yes. If you want to be sure, watch the machine's console while you perform a power off using the integrated power management. If the machine shuts off immediately (while ACPI is enabled) then leaving it enabled should not cause any problems with the cluster. Note: Setting acpid to do /sbin/poweroff or its likeness does not count as an "instant off"... Don't cheat :) -- Lon -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
