# Maintainer: Jakub Hajek, jakub.hajek@cometari.com
#
# docker stack deploy -c stack-elastic.yml elastic
#
# The stack creates Elasticsearch cluster consiting of
# - 3 dedicated master nodes in order to keep quorum
# - 4 dedicated data nodes to manage CRUD,
# - 2 coordination node acting like kind of load balancer in multi instance environments
#
#
# Incoming requests to Elasticsearch REST API are managed through a coordination node.
#
# Kibana is deployed in Esnet and Proxy network and exposed via Traefik via HTTPS.
# Please update the access URL to kibana (label section) and add this DNS entry to
# allow LetsEncrypt to generate a certificate.
#
# Make sure that you have 4 nodes with hostnames: node-1, node-2, node-3, node-4 because
# constraints and volume persistence refers to the hostname or update the configuration accordingly.
#
# Make sure to tune your VM to run Elasticsearch cluster by executing on each server:
# sudo sysctl -w vm.max_map_count=262144
# add --default-ulimit memlock=-1 to Dockerd
# You can manage that by executing this command on each server consiting Swarm cluter: 
# 
# sudo "sed -i '/ExecStart=\/usr\/bin\/dockerd/ s/$/--default-ulimit memlock=-1/' /etc/systemd/system/docker.service.d/10-machine.conf"

version: "3.7"

services:
  coordination:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-coordination
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-coordination
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    ports:
      - target: 9200
        published: 9200
        protocol: tcp
        mode: host
    deploy:
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 2
      resources:
        limits:
          memory: 4G

  master1:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-master1
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-master
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esmaster1:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-1 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 4G

  master2:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-master2
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-master
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esmaster2:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-2 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 4G

  master3:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-master3
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-master
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esmaster3:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-3 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 4G

  data1:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-data1
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-data
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esdata1:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-1 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 6G
  data2:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-data2
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-data
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esdata2:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-2 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 6G
  data3:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-data3
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-data
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esdata3:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-3 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 4G
  data4:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.7.2
    healthcheck:
      test: curl -fs http://localhost:9200/_cat/health || exit 1
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 45s
    configs:
      - source: es-data4
        target: /usr/share/elasticsearch/config/elasticsearch.yml
      - source: jvm-options-data
        target: /usr/share/elasticsearch/config/jvm.options
    networks:
      - esnet
    volumes:
      - esdata4:/usr/share/elasticsearch/data
    deploy:
      placement:
        constraints: [ node.hostname == node-4 ]
      endpoint_mode: dnsrr
      mode: "replicated"
      replicas: 1
      resources:
        limits:
          memory: 6G

  kibana:
    image: docker.elastic.co/kibana/kibana:6.7.2
    environment:
      - "ELASTICSEARCH_URL=http://data1:9200"
    networks:
      - esnet
      - proxy
    deploy:
      labels:
        - "traefik.port=5601"
        - "traefik.docker.network=proxy"
        - "traefik.frontend.rule=Host:kibana-labs.cometari.com"
      mode: replicated
      replicas: 1
      update_config:
        failure_action: rollback
        parallelism: 1
        delay: 10s
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 3

  visualizer:
    image: dockersamples/visualizer
    ports:
      - "8081:8080"
    stop_grace_period: 1m30s
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock"
    deploy:
      placement:
        constraints: [node.role == manager]

  traefik:
    image: traefik:latest
    ports:
      - "80:80"
      - "8080:8080"
      - "443:443"
    networks:
      - proxy
    command:
      - --api
      - --docker
      - --docker.swarmmode
      - --docker.watch
      - --entrypoints=Name:http Address::80 Redirect.EntryPoint:https
      - --entrypoints=Name:https Address::443 TLS
      - --defaultentrypoints=http,https
      - --metrics
      - --metrics.prometheus
      - --acme
      - --acme.email=kuba@cometari.com
      - --acme.storage=/certificates/acme.json
      - --acme.entryPoint=https
      - --acme.httpChallenge.entryPoint=http
      - --acme.onhostrule=true
      - --acme.acmelogging=true
      - --logLevel=INFO
      - --accessLog
    deploy:
      placement:
        constraints: [ node.hostname == node-1 ]
      mode: replicated
      replicas: 1
      restart_policy:
        condition: on-failure
      labels:
        - "traefik.docker.network=proxy"
        - "traefik.port=8080"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock"
      - "traefik-certificates:/certificates"

networks:
  esnet:
    driver: overlay
    attachable: true
    name: esnet
  proxy:
    driver: overlay
    name: proxy

volumes:
  esmaster1:
  esmaster2:
  esmaster3:

  esdata1:
  esdata2:
  esdata3:
  esdata4:
  traefik-certificates:

configs:
  es-coordination:
    name: es-coordination
    file: es-config/es-coordination.yml
  es-master1:
    name: es-master1
    file: es-config/es-master1.yml
  es-master2:
    name: es-master2
    file: es-config/es-master2.yml
  es-master3:
    name: es-master3
    file: es-config/es-master3.yml

  es-data1:
    name: es-data1
    file: es-config/es-data1.yml
  es-data2:
    name: es-data2
    file: es-config/es-data2.yml
  es-data3:
    name: es-data3
    file: es-config/es-data3.yml
  es-data4:
    name: es-data4
    file: es-config/es-data4.yml

  jvm-options-coordination:
    name: jvm-options-coordination
    file: es-config/jvm.coordination.options
  jvm-options-data:
    name: jvm-options-data 
    file: es-config/jvm.data.options
  jvm-options-master:
    name: jvm-options-master
    file: es-config/jvm.master.options