docker-compose.yml

version: "3.7"

### ------------------------------------------------------------------
### Variables
### ------------------------------------------------------------------
x-variables:
  exposed-port: &exposed-port 9200
  es-base: &es-base
    image: docker.elastic.co/elasticsearch/elasticsearch:7.9.1
    ulimits:
      memlock:
        soft: -1
        hard: -1
    networks:
      - elastic
  data-path: &data-path /usr/share/elasticsearch/data      
  snapshots-repository-path: &snapshots-repository-path /usr/share/elasticsearch/backup
  volume-snapshots-repository: &volume-snapshots-repository 
    - type: volume
      source: snapshots-repository
      target: *snapshots-repository-path  
  services-es-env: &es-env-base
    "cluster.name": "es-docker-cluster"
    "cluster.initial_master_nodes": "es01,es02"
    "bootstrap.memory_lock": "true"
    "ES_JAVA_OPTS": "-Xms512m -Xmx512m"
    "ELASTIC_PASSWORD": "esbackup-password"
    "xpack.security.enabled": "true"
    "path.repo": *snapshots-repository-path
### ------------------------------------------------------------------

services:
  es01: # master
    <<: *es-base
    container_name: es01
    environment:
      <<: *es-env-base
      node.name: es01
      discovery.seed_hosts: es02
    volumes:
      - <<: *volume-snapshots-repository 
      - type: volume
        source: data01
        target: *data-path
    ports:
      - published: *exposed-port
        target: 9200
        protocol: tcp
        mode: host

  es02:
    <<: *es-base
    container_name: es02
    environment:
      <<: *es-env-base
      node.name: es02
      discovery.seed_hosts: es01
    volumes:
      - <<: *volume-snapshots-repository 
      - type: volume
        source: data02
        target: *data-path

volumes:
  data01:
    driver: local
  data02:
    driver: local
  snapshots-repository:
    driver: local

networks:
  elastic:
    driver: bridge