In a cluster, changes in elasticsearch.yml must be replicated in all nodes?

Elastic Stack Elasticsearch
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Hi, previously I have made changes to elasticsearch.yml and replicated those changes in all nodes, no Im about to configure xpack.notification.email and I was wandering if it necessary to add this lines in all nodes in my cluster?

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I think that depends on the layout of your cluster.. I have a master, coordinator and data nodes split and depend on what I configure I push it to the specific nodes.. I have email notification configuration item on the coordinator + data nodes for example.

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Thanks Paul, I just have three master nodes, can you please explain what do you mean with "push" the configuration?

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Oh, we us saltstack to keep out configurations in check, this combined with git gives us a solid base. The cluster I manage has 3 master, 4 coordinator, 10 short term (ssd) and 10 longterm (hdd) nodes..

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