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failure probability and clusters

When running a high-availability cluster of two nodes it will generally be configured such that if one node fails then the other runs. Some common operation (such as accessing a shared storage device or pinging a router) will be used by the surviving node to determine that the other node is dead and that it’s [...]

heartbeat – what defines a cluster?

In Debian bug 418210 there is discussion of what constitutes a cluster.

I believe that the node configuration lines in the config file /etc/ha.d/ha.cf should authoritatively define what is in the cluster and any broadcast packets from other nodes should be ignored.

Currently if you have two clusters sharing the same VLAN and they both [...]