80 lines
2.7 KiB
Markdown
80 lines
2.7 KiB
Markdown
## Compose sample application
|
||
### Python/Flask with Nginx proxy and MySQL database
|
||
|
||
Project structure:
|
||
```
|
||
.
|
||
├── compose.yaml
|
||
├── flask
|
||
│ ├── Dockerfile
|
||
│ ├── requirements.txt
|
||
│ └── server.py
|
||
└── nginx
|
||
└── nginx.conf
|
||
|
||
```
|
||
|
||
[_compose.yaml_](compose.yaml)
|
||
```
|
||
services:
|
||
backend:
|
||
build: backend
|
||
...
|
||
db:
|
||
# We use a mariadb image which supports both amd64 & arm64 architecture
|
||
image: mariadb:10.6.4-focal
|
||
# If you really want to use MySQL, uncomment the following line
|
||
#image: mysql:8.0.27
|
||
...
|
||
proxy:
|
||
build: proxy
|
||
...
|
||
```
|
||
The compose file defines an application with three services `proxy`, `backend` and `db`.
|
||
When deploying the application, docker compose maps port 80 of the proxy service container to port 80 of the host as specified in the file.
|
||
Make sure port 80 on the host is not already being in use.
|
||
|
||
> ℹ️ **_INFO_**
|
||
> For compatibility purpose between `AMD64` and `ARM64` architecture, we use a MariaDB as database instead of MySQL.
|
||
> You still can use the MySQL image by uncommenting the following line in the Compose file
|
||
> `#image: mysql:8.0.27`
|
||
|
||
## Deploy with docker compose
|
||
|
||
```
|
||
$ docker compose up -d
|
||
Creating network "nginx-flask-mysql_default" with the default driver
|
||
Pulling db (mysql:8.0.19)...
|
||
5.7: Pulling from library/mysql
|
||
...
|
||
...
|
||
WARNING: Image for service proxy was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
|
||
Creating nginx-flask-mysql_db_1 ... done
|
||
Creating nginx-flask-mysql_backend_1 ... done
|
||
Creating nginx-flask-mysql_proxy_1 ... done
|
||
```
|
||
|
||
## Expected result
|
||
|
||
Listing containers must show three containers running and the port mapping as below:
|
||
```
|
||
$ docker ps
|
||
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
|
||
c2c703b66b19 nginx-flask-mysql_proxy "nginx -g 'daemon of…" 39 seconds ago Up 38 seconds 0.0.0.0:80->80/tcp nginx-flask-mysql_proxy_1
|
||
2b8a21508c3c nginx-flask-mysql_backend "/bin/sh -c 'flask r…" 9 minutes ago Up 38 seconds 0.0.0.0:5000->5000/tcp nginx-flask-mysql_backend_1
|
||
0e6a96ea2028 mysql:8.0.19 "docker-entrypoint.s…" 9 minutes ago Up 38 seconds 3306/tcp, 33060/tcp nginx-flask-mysql_db_1
|
||
|
||
|
||
```
|
||
|
||
After the application starts, navigate to `http://localhost:80` in your web browser or run:
|
||
```
|
||
$ curl localhost:80
|
||
<div>Blog post #1</div><div>Blog post #2</div><div>Blog post #3</div><div>Blog post #4</div>
|
||
```
|
||
|
||
Stop and remove the containers
|
||
```
|
||
$ docker compose down
|
||
```
|