Gfs fencing manual

 · I want to test the fencing capability of GFS by unplugging the network on a node. But I experience some problems when the node I unplug is the gulm master. I am using the RPM: GFS - GFS-modules-smp I have a 8-nodes cluster (sam21, sam22, , sam28). I mount a GFS filesystem on all nodes on /mnt/gfs My config is.  · I have created a 2 nodes cluster with red hat cluster suite and RHEL ES 4. I configured the fencing method as manual. The problem is that when I power off one node to test it, the fencing does not work, on the log I get: fenced: fencing node "nodename" fenced: fence . Daemon started by cman init script to manage gfs in kernel; not used by user. group_tool Used to get a list of groups related to fencing, DLM, GFS, and getting debug information; includes what cman_tool services provided in RHEL 4.

Let us create a file on one of our cluster node. [root@node1 ~]# cd /clusterfs/ [root@node1 clusterfs]# touch file. Now connect to any other cluster node, and this file should exist there as well. [root@node2 ~]# ls /clusterfs/ file. So our Cluster with GFS2 file system configuration is working as expected. government finance statistics manual manual international monetary fund For testing purposes you could use manual fencing (i.e. run fence_manual). PS: Plugging the cable back in without power-cycling is a NO-GO. The failing node is no longer in-sync with the rest of the cluster (they assume the machine has been power-cycled after a manual fence) - you will risk GFS filesystem corruption by attaching it back to the storage without proper fencing procedures!.

Daemon started by cman init script to manage gfs in kernel; not used by user. group_tool, Used to get a list of groups related to fencing, DLM, GFS, and getting. Manual fencing depends on human intervention whenever a node needs recovery. Cluster operation is halted during the intervention. When a GFS cluster is. Manual fencing or meatware is when an administrator must manually power-cycle is something like this: Node1 live-hangs with a lock on a GFS file system.