80 lines
2.5 KiB
Markdown
80 lines
2.5 KiB
Markdown
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## Compose sample application
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### Python/Flask with Nginx proxy and MySQL database
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Project structure:
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```
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.
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├── compose.yaml
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├── flask
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│ ├── Dockerfile
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│ ├── requirements.txt
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│ └── server.py
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└── nginx
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└── nginx.conf
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```
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[_compose.yaml_](compose.yaml)
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```
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services:
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backend:
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build:
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context: backend
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target: builder
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...
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db:
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# We use a mariadb image which supports both amd64 & arm64 architecture
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image: mariadb:10-focal
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# If you really want to use MySQL, uncomment the following line
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#image: mysql:8
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...
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proxy:
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build: proxy
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...
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```
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The compose file defines an application with three services `proxy`, `backend` and `db`.
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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.
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Make sure port 80 on the host is not already being in use.
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> ℹ️ **_INFO_**
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> For compatibility purpose between `AMD64` and `ARM64` architecture, we use a MariaDB as database instead of MySQL.
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> You still can use the MySQL image by uncommenting the following line in the Compose file
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> `#image: mysql:8`
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## Deploy with docker compose
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```
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$ docker compose up -d
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Creating network "nginx-flask-mysql_default" with the default driver
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Pulling db (mysql:8.0.19)...
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5.7: Pulling from library/mysql
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...
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...
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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`.
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Creating nginx-flask-mysql_db_1 ... done
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Creating nginx-flask-mysql_backend_1 ... done
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Creating nginx-flask-mysql_proxy_1 ... done
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```
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## Expected result
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Listing containers should 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 SERVICE STATUS PORTS
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nginx-flask-mysql-backend-1 "flask run" backend running 0.0.0.0:8000->8000/tcp
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nginx-flask-mysql-db-1 "docker-entrypoint.s…" db running (healthy) 3306/tcp, 33060/tcp
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nginx-flask-mysql-proxy-1 "nginx -g 'daemon of…" proxy running 0.0.0.0:80->80/tcp
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```
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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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<div>Blog post #1</div><div>Blog post #2</div><div>Blog post #3</div><div>Blog post #4</div>
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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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