awesome-compose/nginx-nodejs-redis/README.md

Compose sample application

Node.js application with Nginx proxy and a Redis database

Project structure:

.
├── docker-compose.yml
├── nginx
│   ├── Dockerfile
│   └── nginx.conf
├── web
│   ├── Dockerfile
│   ├── package.json
│   └── server.js
├── web1
│   ├── Dockerfile
│   ├── package.json
│   └── server.js
└── web2
    ├── Dockerfile
    ├── package.json
    └── server.js

4 directories, 12 files

docker-compose.yml

version: '3.9'
services:
  redis:
    image: 'redis:alpine'
    ports:
      - '6379:6379'
  web1:
    restart: on-failure
    build: ./web1
    ports:
      - '81:5000'
  web2:
    restart: on-failure
    build: ./web2
    ports:
      - '82:5000'
  nginx:
    build: ./nginx
    ports:
    - '80:80'
    depends_on:
    - web1
    - web2

The compose file defines an application with four services redis, web, web1 and web2. When deploying the application, docker-compose maps port 80 of the web 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

Creating nginx-nodejs-redis_redis_1 ... done
Creating nginx-nodejs-redis_web1_1  ... done
Creating nginx-nodejs-redis_web2_1  ... done
Creating nginx-nodejs-redis_nginx_1 ... done

Expected result

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

docker-compose ps
           Name                        Command              State           Ports         
------------------------------------------------------------------------------------------
nginx-nodejs-redis_nginx_1   /docker-entrypoint.sh ngin     Up      0.0.0.0:80->80/tcp    
                             ...                                                          
nginx-nodejs-redis_redis_1   docker-entrypoint.sh redis     Up      0.0.0.0:6379->6379/tcp
                             ...                                                          
nginx-nodejs-redis_web1_1    docker-entrypoint.sh npm       Up      0.0.0.0:81->5000/tcp  
                             start                                                        
nginx-nodejs-redis_web2_1    docker-entrypoint.sh npm       Up      0.0.0.0:82->5000/tcp  
                             start   

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

$ curl localhost:80
web2: Total number of visits is: 4

Stop and remove the containers

$ docker-compose down