Unable to install multi-node cluster - Skipping security auto configuration because this node is configured to bootstrap or to join a multi-node cluster, which is not supported., with exit code 80

Elastic Stack Elasticsearch
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  1. Install elasticsearch on node-1
  2. Update the elasticsearch.yml for node-1
  3. Start elasticsearch node-1
  4. Check the health of nodes
  5. Run "elasticsearch-create-enrollment-token -s node" on node-1
  6. Install elasticsearch on node-2
  7. Run the "elasticsearch-reconfigure-node --enrollment-token " command on node-2 with the token from node-1 (Run the elasticsearch-reconfigure-node tool before starting elasticsearch)
  8. Update the elasticsearch.yml for node-2
  9. Start elasticsearch node-2

Refer to the above two articles. Pay attention to the configuration of http.host and transport.host when using multiple network cards."