Hello, Good question. I myself use the manual split brain recovery after one of the nodes fails. See http://www.drbd.org/users-guide/s-resolve-split-brain.html. If anyone can share how to resolve this without manual intervention it would be great. Cheers! On Tue, Mar 15, 2011 at 2:34 PM, jayesh.shinde <jayesh.shinde@xxxxxxxxxxxxx> wrote: > Hi All , > > Just want mention one point. I am using Ext3 filesystem in below setup. > > Regards > Jayesh Shinde > > > On 03/15/2011 05:43 PM, jayesh.shinde wrote: > > Hi All , > > I don't have SAN with me , so I want to build the 2 node DRBD active active > for mysql & http resource ( i.e /dev/drbd2 & /dev/drbd3 in my case) with > RHCS . > > I configured the require setup from > http://sourceware.org/cluster/wiki/DRBD_Cookbook and from DRDB links. > > From last 1 week I am testing the same scenario in 2 XEN vms with kenel > 2.6.18-128.el5xen , Every thing is working fine , like mysql and http > services move from one server to other etc... But not working correctly > when it get fence ( i.e when n/w fail on of the node). > > I am facing the split-brain problem. I search a lot in google and mailling > list but don't found the proper correct solution and suggestion. > > For Fence testing I am doing following. > ================================ > 1) On node1 http service is running with /dev/drbd2 > 2) On node2 mysql service is runing with /dev/drbd3 > At this movement the DRBD primary-primary status is working correctly. > 3) Now On node2 When I stop n/w service manually by "service network stop" > then within 3-5 sec. node2 get fence properly and mysql service get switch > on node1 properly. > 4) After fencing when node2 come up , then I am facing the DRBD split-brain > issue with node1 and node2. > > My questions :-- > ========== > 1) Why DRBD Split brain is not coming when I reboot or shutdown or destroy > the machine by xm command > i.e "xm reboot <node1/node2>" OR xm shutdown <node1/node2> > OR xm destroy <node/node2> > > 2) Why the DRBD split brain issue come at the time of fencing node only ? > > 3) Is the combination of DRBD active-active + RHCS is stable ? and workable > solution > Because one of the below mailling list I found it's workable solution > http://www.gossamer-threads.com/lists/drbd/users/20467#20467 > > 4) In fencing Is there any extra setting require for such combination ? > 5) Do I need to use any custom fencing logic ? > > 6) Any one using such "DRBD active-active + RHCS" setup in Live without > split brain issue ? > > Please guide and suggest on the same. > > Regards > Jayesh Shinde > > > > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
