docker-compose.opensearch.base.yml

services:
  opensearch:
    image: opensearchproject/opensearch:2.18.0
    environment:
      - "cluster.name=opensearch-cluster"
      - "bootstrap.memory_lock=true" # along with the memlock settings below, disables swapping
      - "OPENSEARCH_JAVA_OPTS=-Xms1024m -Xmx1024m" # Set min and max JVM heap sizes to at least 50% of system RAM
      - "DISABLE_INSTALL_DEMO_CONFIG=true" # disables execution of install_demo_configuration.sh bundled with security plugin, which installs demo certificates and security configurations to OpenSearch
      - "DISABLE_SECURITY_PLUGIN=true" # disables security plugin entirely in OpenSearch by setting plugins.security.disabled: true in opensearch.yml
    healthcheck:
      test: curl http://localhost:9200/_cluster/health || exit 1
      interval: 3s
      timeout: 3s
      retries: 20
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536 # maximum number of open files for the OpenSearch user, set to at least 65536 on modern systems
        hard: 65536