You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

72 lines
2.1 KiB
Markdown

This file contains invisible Unicode characters!

This file contains invisible Unicode characters that may be processed differently from what appears below. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to reveal hidden characters.

## Compose sample application
### Python/Flask application with Nginx proxy and a Mongo database
Project structure:
```
.
├── compose.yaml
├── flask
│   ├── Dockerfile
│   ├── requirements.txt
│   └── server.py
└── nginx
   └── nginx.conf
```
[_compose.yaml_](compose.yaml)
```
services:
web:
build: app
ports:
- 80:80
backend:
build: flask
...
mongo:
image: mongo
```
The compose file defines an application with three services `web`, `backend` and `db`.
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.
Make sure port 80 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 network "nginx-flask-mongo_default" with the default driver
Pulling mongo (mongo:)...
latest: Pulling from library/mongo
423ae2b273f4: Pull complete
...
...
Status: Downloaded newer image for nginx:latest
Creating nginx-flask-mongo_mongo_1 ... done
Creating nginx-flask-mongo_backend_1 ... done
Creating nginx-flask-mongo_web_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
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
dba87a080821 nginx-flask-mongo_backend "./server.py" About a minute ago Up About a minute nginx-flask-mongo_backend_1
d7eea5481c77 mongo "docker-entrypoint.s…" About a minute ago Up About a minute 27017/tcp nginx-flask-mongo_mongo_1
```
After the application starts, navigate to `http://localhost:80` in your web browser or run:
```
$ curl localhost:80
Hello from the MongoDB client!
```
Stop and remove the containers
```
$ docker compose down
```