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README.md

Blue-Green Deployment

This repository contains the files for the docker image hanzel/blue-green, that will create blue-green deployment. It uses nginx using consul template. It requires consul as the key value store and registrator service running in each host. It works with docker swarm and multi-host networking.

Usage

Set the following environment variables:

  • BLUE_NAME: The container name that we want as the blue service. Default: blue.
  • GREEN_NAME: The container name that we want as the green service. Default: green.
  • LIVE: The service that is in production initially. Default: blue.
  • CONSUL_URL: URL endpoint for consul instance.

Docker Compose

Sample docker-compose.yml configuration is given below:

version: '2'

services:
  bg:
    image: hanzel/blue-green
    container_name: bg
    ports:
      - "80:80"
      - "8080:8080"
    environment:
      - CONSUL_URL=${IP}:8500
      - BLUE_NAME=blue
      - GREEN_NAME=green
      - LIVE=blue
    depends_on:
      - green
      - blue
    networks:
      - front-tier

  blue:
    image: hanzel/nginx-html:1
    ports:
      - "80"
    environment:
      - SERVICE_80_NAME=blue
    networks:
      - front-tier

  green:
    image: hanzel/nginx-html:2
    ports:
      - "80"
    environment:
      - SERVICE_80_NAME=green
    networks:
      - front-tier

networks:
  front-tier:
    driver: bridge

About

This docker image will implement blue-green deployment for dockers.

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