124 lines
3.0 KiB
Markdown
124 lines
3.0 KiB
Markdown
## 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.yaml_](docker-compose.yaml)
|
||
```
|
||
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
|
||
```
|
||
|