We are running a two-site index cluster with three indexers on each site. We plan to have a standby master node (replication master) on the second site. Can we have a DNS alias with a list of two nodes, the active and the standby replication master in the server.conf of the slave Indexers and the search heads?
Thus, we would only need to guarantee that never both masters are running at the same time, but we do not need to change any configuration setting on the indexers or search heads. Using the same IP is not an option, as we have no layer 2 connection between the two sites.
Or are there other options, except load balancers, to failover the replication master to the other site while there is no layer two Connection.