AN!Cluster Recovery

Alteeve Wiki :: How To :: AN!Cluster Recovery

Note: This tutorial is designed for users and customers who are running AN!Clusters, based on the 2-Node Red Hat KVM Cluster Tutorial tutorial.

This tutorial is designed to provide very basic, to the point steps to guide you through recovery of an AN!Cluster after a fault. It is not designed as a primary education on this topic. For a proper understanding of the steps below, please take the time to study the main tutorial.

Node Was Rebooted Uncleanly Rebooted, VM(s) Offline

If a node was rebooted using the reboot command, then it is possible for the VMs to have crashed in such a manner to leave them in the failed state. Once a VM goes into a failed state, it will not recover without human intervention. This section checks for and recovers from this scenario.

{{note|1=This section assumes you have a dedicate "cluster monitor" machine. If you don't, then use a machine running linux with virt-manager installed.

Recovery Steps When Both Nodes Are Running

This recovery procedure assumes that the rebooted node was restored.

1. Log into your cluster monitor machine (or a workstation with virt-manager) installed.
   1. Open up four terminals as described here.
   2. On the top two terminals, ssh into the first node in the cluster. On the top-right terminal, run clear; tail -f -n 0 /var/log/messages.

 

Any questions, feedback, advice, complaints or meanderings are welcome.
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