A counter web application built using Node.js, Nginx proxy and Redis database

Project structure:

tree
.
├── LICENSE
├── README.md
├── compose.yml
├── nginx
│   ├── Dockerfile
│   └── nginx.conf
└── web
    ├── Dockerfile
    ├── package-lock.json
    ├── package.json
    └── server.js

3 directories, 9 files

compose.yml


services:
  redis:
    image: redis
    ports:
      - '6379:6379'
  web1:
    restart: on-failure
    build: ./web
    hostname: web1
    ports:
      - '81:5000'
  web2:
    restart: on-failure
    build: ./web
    hostname: web2
    ports:
      - '82:5000'
  nginx:
    build: ./nginx
    ports:
    - '80:80'
    depends_on:
    - web1
    - web2

The compose file defines an application with four services redis, nginx, web1 and web2. When deploying the application, Docker compose maps port 80 of the nginx service container to port 80 of the host as specified in the file.

ℹ️ INFO
Redis runs on port 6379 by default. Make sure port 6379 on the host is not being used by another container, otherwise the port should be changed.

Deploy with docker compose

$ docker compose up -d
[+] Running 24/24
 ⠿ redis Pulled                                                                                                                                                                                                                      ...
   ⠿ 565225d89260 Pull complete                                                                                                                                                                                                      
[+] Building 2.4s (22/25)
 => [nginx-nodejs-redis_nginx internal] load build definition from Dockerfile                                                                                                                                                         ...
[+] Running 5/5
 ⠿ Network nginx-nodejs-redis_default    Created                                                                                                                                                                                      
 ⠿ Container nginx-nodejs-redis-web2-1   Started                                                                                                                                                                                      
 ⠿ Container nginx-nodejs-redis-redis-1  Started                                                                                                                                                                                      
 ⠿ Container nginx-nodejs-redis-web1-1   Started                                                                                                                                                                                      
 ⠿ Container nginx-nodejs-redis-nginx-1  Started

Expected result

Listing containers must show three containers running and the port mapping as below:

docker compose ps

Testing the app

After the application starts, navigate to http://localhost:80 in your web browser or run:

curl localhost:80
curl localhost:80
web1: Total number of visits is: 1

curl localhost:80
web1: Total number of visits is: 2

$ curl localhost:80
web2: Total number of visits is: 3

Tear down the containers

$ docker compose down

License

dockersamples/nginx-node-redis

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