If I decide to start with a single node ES cluster (version 7.1.1) where I set
What is the path to go for migrate this cluster to a 3 node cluster? All data of the cluster needs to be kept.
Just change discovery.type, add
discovery.seed_hosts which contains all 3 hosts and add
cluster.initial_master_nodes which contains the nodes names?
Then (re-)starting all nodes and I am done?
Or is there more to do?
And how to change the number of replicas for existing indices?