0_docker-swarm.md

docker stack deploy a multi overlay network with mutli service.

default.conf

upstream n1_box {
    server n1_box:80;
}
upstream n2_box {
    server n2_box:80;
}
upstream n3_box {
    server n3_box:80;
}

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;

    location / {
        root   /usr/share/nginx/html;
    }

    location /n1 {
        rewrite /n1/(.*) /$1  break;
        proxy_set_header host $http_host;
        proxy_pass http://n1_box;
    }
    location /n2 {
        rewrite /n2/(.*) /$1  break;
        proxy_set_header host $http_host;
        proxy_pass http://n2_box;
    }
    location /n3 {
        rewrite /n3/(.*) /$1  break;
        proxy_set_header host $http_host;
        proxy_pass http://n3_box;
    }
}

n1.yml

version: "3.2"
services:
  box:
    image: nginx:latest
    deploy:
      placement:
        constraints:
          - node.hostname == node-1
    ports:
      - "81:80"
    volumes:
      - type: bind
        source: /vagrant/n1/html
        target: /usr/share/nginx/html
networks:
  default:
    driver: overlay
    ipam:
      driver: default
      config:
        - subnet: 172.16.1.0/24

n2.yml

version: "3.2"
services:
  box:
    image: nginx:latest
    deploy:
      placement:
        constraints:
          - node.hostname == node-2
    ports:
      - "82:80"
    volumes:
      - type: bind
        source: /vagrant/n2/html
        target: /usr/share/nginx/html
networks:
  default:
    driver: overlay
    ipam:
      driver: default
      config:
        - subnet: 172.16.2.0/24

n3.yml

version: "3.2"
services:
  box:
    image: nginx:latest
    deploy:
      placement:
        constraints:
          - node.hostname == node-3
    ports:
      - "83:80"
    volumes:
      - type: bind
        source: /vagrant/n3/html
        target: /usr/share/nginx/html
networks:
  overlay:
    driver: overlay
    ipam:
      driver: default
      config:
        - subnet: 172.16.0.0/16

proxy.yml

version: "3.2"
services:
  box:
    image: nginx:latest
    deploy:
      placement:
        constraints:
          - node.hostname == node-1
    ports:
      - "80:80"
    volumes:
      - type: bind
        source: /vagrant/proxy/conf.d
        target: /etc/nginx/conf.d
      - type: bind
        source: /vagrant/proxy/html
        target: /usr/share/nginx/html
    networks:
      - default
      - n1_default
      - n2_default
      - n3_default
networks:
  n1_default:
    external:
      name: n1_default
  n2_default:
    external:
      name: n2_default
  n3_default:
    external:
      name: n3_default