72 lines
2.2 KiB
Markdown
72 lines
2.2 KiB
Markdown
## Compose sample application
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### Python/Flask application with Nginx proxy and a Mongo database
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Project structure:
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```
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.
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├── docker-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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[_docker-compose.yaml_](docker-compose.yaml)
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```
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services:
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web:
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build: app
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ports:
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- 80:80
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backend:
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build: flask
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...
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mongo:
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image: mongo
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```
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The compose file defines an application with three services `web`, `backend` and `db`.
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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.
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Make sure port 80 on the host is not being used by another container, otherwise the port should be changed.
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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-mongo_default" with the default driver
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Pulling mongo (mongo:)...
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latest: Pulling from library/mongo
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423ae2b273f4: Pull complete
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...
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...
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Status: Downloaded newer image for nginx:latest
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Creating nginx-flask-mongo_mongo_1 ... done
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Creating nginx-flask-mongo_backend_1 ... done
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Creating nginx-flask-mongo_web_1 ... done
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```
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## Expected result
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Listing containers must show three containers running and the port mapping as below:
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```
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$ docker ps
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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a0f4ebe686ff nginx "/bin/bash -c 'envsu…" About a minute ago Up About a minute 0.0.0.0:80->80/tcp nginx-flask-mongo_web_1
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dba87a080821 nginx-flask-mongo_backend "./server.py" About a minute ago Up About a minute nginx-flask-mongo_backend_1
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d7eea5481c77 mongo "docker-entrypoint.s…" About a minute ago Up About a minute 27017/tcp nginx-flask-mongo_mongo_1
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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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Hello from the MongoDB client!
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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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