I've allready look in the doc or in differents topics but can't find the exact answer of my question
So here is my question :
I've an up and running cluster, in which I want to add a new node.
So the config file for the new node will have this parameters :
cluster.name: CLUSTER1 node.name: NODE5 ... discovery.zen.ping.unicast.hosts: ["NODE1", "NODE2", "NODE3, NODE4"] discovery.zen.minimum_master_nodes: 2 ...
This new node will be aware of all the others.
However, in the config files of the nodes (NODE1-4), the discovery.zen.* parameters are differents.
Indeed there is not the NODE5 in the hosts.
Is it necessary to stop each node one by one, change the config file and then reboot them ?
Another question about discovery.zen.minimum_master_nodes, is it necessary to change it from to 3 ? and is it also necessary to change it on every others nodes ?