I need to configure the service with 2 web servers and 2 servers assigned for elasticsearch.
I'm going to make cluster configuration with 2 elasticsearch server like below.
Server 1 : 1 Master node, 2 data node
Server 2 : 1 Master node, 2 data node
Does it have any issue if there are 2 master nodes?
To make odd number of master node, I considered to install one more master node in a web server.
However, 2 webservers are configured by redundancy(Active - Standby), so it is impossible to install a master node in one webserver.
If I install master node in 2 webservers, master nodes will be 4 and one master node should be offline.
I'd like to know this configuration is OK.