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Install OpenSearch (Hardened)

Launch, connect, and validate — with the expected result after every step.

Prerequisites

AWS

  1. Subscribe and launch with 4 vCPU+ and RAM ≥ 8 GB (heap sizing: ~50% of RAM).
    Expected result curl http://127.0.0.1:9200/ on the instance returns the cluster banner.
  2. For network access: configure the security plugin (TLS + users) FIRST, then set network.host and open 9200 to your app subnet only. Never expose 9200 without auth.
    Expected result Remote client authenticates over TLS; anonymous requests are refused.

Validate

curl -s http://127.0.0.1:9200/_cluster/health | jq .status   → green (single node: yellow for replicated indices is normal)

First boot: Node data directory initializes fresh on first start (build-time state is wiped). vm.max_map_count preset via sysctl.

Secure it

Costs & quotas

Software is billed by the marketplace at the listed rate; infrastructure (VM, storage, egress) is billed by your cloud at its standard rates. The recommended size fits default service quotas in most accounts — if you scale out, review your cloud's quota console before launch.

Next: configuration · troubleshooting · security notes