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Docker2

Portainer is a web UI for managing containers

docker run -d -p 9000:9000 \
-v /var/run/docker.sock:/var/run/docker.sock \
portainer/portainer

Haproxy docker container

version: "2"
services:
  haproxy:
    image: eeacms/haproxy
    depends_on:
    - webapp
    ports:
    - "80:5000"
    - "1936:1936"
    environment:
      BACKENDS: "webapp"
      DNS_ENABLED: "true"
      LOG_LEVEL: "info"

  webapp:
    image: eeacms/hello

The application can be scaled to use more server instances, with docker-compose scale:

$ docker-compose up -d
$ docker-compose scale webapp=4

The results can be checked in a browser, navigating to http://localhost. By refresing the page multiple times it is noticeable that the IP of the server that served the page changes, as HAProxy switches between them. The stats page can be accessed at http://localhost:1936 where you have to log in using the STATS_AUTH authentication details (default admin:admin).

Docker compose file for ghost blog using sqlite

version: '3'

services:

   ghost:
     image: ghost:2-alpine
     restart: always

     ports:
      - "2368:2368"
     
     volumes:
      - "/sqlite3/ghost/data:/var/lib/ghost/content"

NGINX web server container

version: '3'

services:

   nginx-proxy:
    image: nginx
    
    expose:
      - 80
      - 443

    ports:
     - "80:80"
     - "443:443"
    environment:
     DEFAULT_HOST: nodeapp.local

    volumes:
     - "/etc/nginx/vhost.d"
     - "/usr/share/nginx/html"
     - "/var/run/docker.sock:/tmp/docker.sock:ro"
    restart: unless-stopped

Open Distro Elastic Search Docker compose file

version: '3'
services:
  odfe-node1:
    image: amazon/opendistro-for-elasticsearch:1.0.1
    container_name: odfe-node1
    environment:
      - cluster.name=odfe-cluster
      - node.name=odfe-node1
      - discovery.seed_hosts=odfe-node1,odfe-node2
      - cluster.initial_master_nodes=odfe-node1,odfe-node2
      - bootstrap.memory_lock=true # along with the memlock settings below, disables swapping
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m" # minimum and maximum Java heap size, recommend setting both to 50% of system RAM
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536 # maximum number of open files for the Elasticsearch user, set to at least 65536 on modern systems
        hard: 65536
    volumes:
      - odfe-data1:/usr/share/elasticsearch/data
    ports:
      - 9200:9200
      - 9600:9600 # required for Performance Analyzer
    networks:
      - odfe-net
  odfe-node2:
    image: amazon/opendistro-for-elasticsearch:1.0.1
    container_name: odfe-node2
    environment:
      - cluster.name=odfe-cluster
      - node.name=odfe-node2
      - discovery.seed_hosts=odfe-node1,odfe-node2
      - cluster.initial_master_nodes=odfe-node1,odfe-node2
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    volumes:
      - odfe-data2:/usr/share/elasticsearch/data
    networks:
      - odfe-net
  kibana:
    image: amazon/opendistro-for-elasticsearch-kibana:1.0.1
    container_name: odfe-kibana
    ports:
      - 5601:5601
    expose:
      - "5601"
    environment:
      ELASTICSEARCH_URL: https://odfe-node1:9200
      ELASTICSEARCH_HOSTS: https://odfe-node1:9200
    networks:
      - odfe-net

volumes:
  odfe-data1:
  odfe-data2:

networks:
  odfe-net: