1. A method, comprising: receiving, by a computing device, a list of historical events related to a high availability pair comprising a first node and a second node of a distributed computing system; determining, by the computing device, a set of non-veto events and a set of veto events related to at least one of the nodes from the list of historical events; obtaining, by the computing device, a severity index and a compliance factor for each event of the set of non-veto events; and generating and outputting, by the computing device, a confidence measure for the at least one of the nodes based on the set of veto events, the severity index, and the compliance factor.