Hello Gordan, Fencing works fine when the switcher is ok. I can fence a node from the other, and when the communication is lost the cluster fence the node that needs to fence. (I have a funny issue when I start the firewall and the communication was lost, the nodes fences each other...)
You say its normal that the nodes halt until the switch comes up, but I prefer that they reboots. I use fence_ipmilan agent to fence but I dont know how to configure to do what I want any idea? thanks ESG 2009/4/28 Gordan Bobic <[email protected]> > On Tue, 28 Apr 2009 17:21:13 +0200, ESGLinux <[email protected]> wrote: > > > The nodes are connected through a single switcher (I know, this is a > single > > point of failure...). If I reboot the switcher, the two nodes halt. > > (through > > fencing it can be done because the go through the same switcher) > > If they can't fence each other, cluster services will pause until fencing > can > be performed and verified. If this isn't happening (because the only path > between them with also covers fencing, is gone), then the behaviour you are > seeing is expected. But when the switch comes back up, they should resume. > > If they don't resume when the switch comes back up, then that sounds like a > fencing configuration issue. Have you verified that fencing works and that > each node can successfully fence the other? > > It is normally a good idea to isolate the cluster communication to a > dedicated interface. If you only have 2 nodes, you could just connect them > directly on a dedicated interface, without a switch. > > > I don´t know if this behaviour is normal and if its possible to control > > it. > > I want that when this happens the nodes dont do nothing or at least they > > reboot, not halt. > > You can configure the action you want the fencing agent to perform. Look > up the man page for the fencing agent you are using. I thought the default > was to reboot (at least it is for the DRAC agent). > > Gordan > > -- > Linux-cluster mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/linux-cluster >
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