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- Each node’s hostname is set to its FQDN, according to the values shown in the VMs DNS list table. This value is referenced in the configuration file of Elasticsearch.
- It is recommended to disable system swapping, which can result in parts of JVM Heap or even its executable pages being swapped out to disk.
- Various communications take place in a cluster, with their connections requiring specific ports being opened in the firewall. The following list represents our situation.
- wifimon-node{1,2,3}.rash.al: 9200/tcp, 9300/tcp
- wifimon-kibana.rash.al: 9200/tcp, 9300/tcp, 5601/tcp
- wifimon-logstash.rash.al: 5044/tcp
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