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## Compose sample application
## Node.js application with Nginx proxy and Redis database
Project structure:
```
.
├── README.md
├── compose.yaml
├── nginx
│   ├── Dockerfile
│   └── nginx.conf
└── web
├── Dockerfile
├── package.json
└── server.js
2 directories, 7 files
```
[_compose.yaml_](compose.yaml)
```
redis:
image: 'redislabs/redismod'
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.
> **_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
```
## Stop and remove the containers
```
$ docker compose down
```