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

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## 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_](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.
> **_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
```