On Mon, 2011-11-28 at 21:47 +0100, Tim Serong wrote: > On 11/28/2011 06:54 PM, Muhammad Sharfuddin wrote: > > is it good/required to create order constraint for sbd resource > > > > I am using following fencing resource: > > > > primitive sbd_stonith stonith:external/sbd \ > > meta target-role="Started" \ > > op monitor interval="3000" timeout="120" \ > > op start interval="0" timeout="120" \ > > op stop interval="0" timeout="120" \ > > params > > sbd_device="/dev/disk/by-id/scsi-360080e50002377b8000002ff4e4bc873" > > > > I have following order constraints: > > > > order resA-before-resB inf: resA resB symmetrical=true > > order resB-before-resC inf: resB resC symmetrical=true > > > > should I also create another constraint for sbd like: > > > > order sbd_stonith-before-resA inf: sbd_stonith resA symmetrical=true > > > > please help/suggest. > > No. The STONITH resource doesn't need to be running in order for your > other resources to be operable (hence no need for an order constraint). > > Regards, > > Tim true, but if there is an order constraint for the STONITH resource, then it will at least make it sure that no other resource will be start before the STONITH resource.
e.g: order sbd_stonith-before-resA inf: sbd_stonith resA symmetrical=true order resA-before-resB inf: resA resB symmetrical=true order resB-before-resC inf: resB resC symmetrical=true Because I stopped all the resources including STONITH resource(and stopping any resource sets the 'target-role="Stopped"'), then started all other resources else/except the STONITH resource, so at that time my cluster has no fencing resource available. So in order to protect the cluster I thought that there should(must) be an order constraint that specifies that no other resource(s) will be start if STONITH resource is stopped/unavailable. Please suggest/recommend -- Regards, Muhammad Sharfuddin Technical Manager _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
