Is removing cluster.initial_master_nodes still necessary?

Elastic Stack Elasticsearch
1

Hi,

The documentation for elasticsearch 7.14 states, that the configuration setting cluster.initial_master_nodes has to be removed from the configuration file after a cluster has formed sucessfully and should be absent when a new node is added or the cluster is restarted.

While evaluating elasticsearch deployment options, I tried ansible-elasticsearch, which does not remove this option from elasticsearch.yml after the cluster is bootstraped successfully.

I already searched this forum and found this Post, where @DavidTurner stated, that not removing this option could, under certain circumstances, lead to possible data loss and accidentially form a new cluster.

My questions are:

  1. Is this still valid for elasticsearch 7.14.1?
  2. Should the cluster.initial_master_nodes always get removed after cluster bootstraping?
  3. Under what circumstances could data loss occur?

Thank you for your help!

Kind regards,
Marc

2

  1. Yes.

  2. Yes.

  3. Too many to enumerate really but it's only rare circumstances involving other misconfigurations.

2 Likes
3

Thank you for the fast reply.

4

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