Network failure
In the following example, you will perform a cluster node network failure test. Network failure can occur due to network infrastructure equipment failure or cluster node network card failure. An important part of this test is the fact that the problematic cluster node with the network failure could still be online and could still have access to the shared cluster storage and cluster data. It is very important for the fencing mechanism to fence the problematic cluster node and make sure it is offline, without access to the cluster data.
The cluster from the following example is configured to provide a webserver cluster service. The webserver cluster service is a combination of a cluster IP address and an Apache webserver instance. The webserver cluster service is running on the node-3 cluster node. In the following screenshot, you can see the cluster status prior to the network failure test:
You can proceed to simulate the node-3 cluster node's network failure by removing...
