121 lines
2.9 KiB
Markdown
121 lines
2.9 KiB
Markdown
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## Compose sample application
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### Node.js application with Nginx proxy and a Redis database
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Project structure:
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```
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.
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├── docker-compose.yml
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├── nginx
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│ ├── Dockerfile
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│ └── nginx.conf
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├── web
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│ ├── Dockerfile
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│ ├── package.json
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│ └── server.js
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├── web1
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│ ├── Dockerfile
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│ ├── package.json
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│ └── server.js
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└── web2
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├── Dockerfile
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├── package.json
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└── server.js
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4 directories, 12 files
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```
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[_docker-compose.yaml_](docker-compose.yaml)
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```
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version: '3.9'
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services:
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redis:
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image: 'redis:alpine'
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ports:
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- '6379:6379'
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web1:
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restart: on-failure
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build: ./web1
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ports:
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- '81:5000'
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web2:
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restart: on-failure
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build: ./web2
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ports:
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- '82:5000'
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nginx:
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build: ./nginx
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ports:
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- '80:80'
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depends_on:
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- web1
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- web2
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```
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The compose file defines an application with four services `redis`, `web`, `web1` and `web2`.
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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.
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Redis runs on default port 6379. Make sure port 6379 on the host is not being used by another container, otherwise the port should be changed.
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## Deploy with docker-compose
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```
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$ docker-compose up -d
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```
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```
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Creating nginx-nodejs-redis_redis_1 ... done
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Creating nginx-nodejs-redis_web1_1 ... done
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Creating nginx-nodejs-redis_web2_1 ... done
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Creating nginx-nodejs-redis_nginx_1 ... done
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```
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## Expected result
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Listing containers must show three containers running and the port mapping as below:
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```
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docker-compose ps
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Name Command State Ports
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------------------------------------------------------------------------------------------
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nginx-nodejs-redis_nginx_1 /docker-entrypoint.sh ngin Up 0.0.0.0:80->80/tcp
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...
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nginx-nodejs-redis_redis_1 docker-entrypoint.sh redis Up 0.0.0.0:6379->6379/tcp
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...
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nginx-nodejs-redis_web1_1 docker-entrypoint.sh npm Up 0.0.0.0:81->5000/tcp
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start
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nginx-nodejs-redis_web2_1 docker-entrypoint.sh npm Up 0.0.0.0:82->5000/tcp
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start
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```
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## Testing the app
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After the application starts, navigate to `http://localhost:80` in your web browser or run:
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```
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curl localhost:80
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curl localhost:80
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web1: Total number of visits is: 1
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```
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```
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curl localhost:80
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web1: Total number of visits is: 2
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```
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```
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$ curl localhost:80
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web2: Total number of visits is: 3
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```
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```
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$ curl localhost:80
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web2: Total number of visits is: 4
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```
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## Stop and remove the containers
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```
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$ docker-compose down
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```
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