I have a question about elasticsearch configuration

Elastic Stack Elasticsearch
1

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.

2

Ideally you have 3 master nodes in each cluster. Running one on another server might be an option.

3

7.x changed master election, it might work if you make both web servers voting only nodes for master election.

4

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