uhi67/docker-reverse-proxy-example

Example configuration of a reverse proxy in Docker swarm environment with nginx

Docker swarm reverse proxy example with nginx

This solution uses the automated nginx proxy from jwilder/proxy. The point is that in Portainer i made separate stacks for the proxy and the application(s).

Test environment:

• Ubuntu 16.04 LTS
• Docker version 17.05.0-ce, build 89658be
• Swarm mode with single node

The network

The key to the solution is a common network you have to define in the Networks section of Portainer.

Name	proxy
Driver	overlay
Scope	swarm
Attachable	false
Internal	false
Subnet	10.0.0.0/24
Gateway	10.0.0.1

The corresponding docker command is (not tested):

docker network create --driver overlay --attachable proxy

The proxy stack

The proxy stack is created with docker-compose-proxy.yml file. Contains a single proxy container based on jwilder/nginx-proxy image.

version: '3'
services:
  proxy:
    image: jwilder/nginx-proxy
    ports:
      - 80:80
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    networks:
      - proxy
networks:
  proxy:
    external: true

The application stack

The application stack is created with docker-compose-app.yml file. The example contains a single test application using jwilder/whoami image.

version: '3'
services:
  whoami:
    image: jwilder/whoami
    environment:
      - VIRTUAL_HOST=whoami.yourdomain
    ports:
      - 8098:8000
    networks:
      - app     # if more than one container exists, must be added to all containers
      - proxy   # add only to the web container
networks:
  app:
  proxy:
    external: true

If the application stack has other containers, e.g. 'db', it also have to connected to the network 'proxy' or an other common network with the main application container.