67 lines
2.1 KiB
Markdown
67 lines
2.1 KiB
Markdown
## Compose sample application
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### Elixir application with Phoenix framework and a Postgres database
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Project structure:
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```
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.
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├── app
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│ ├── Dockerfile
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│ ...
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├── docker-compose.yaml
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├── phoenix_output.png
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└── README.md
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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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app:
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build: app
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environment:
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...
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db:
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image: postgres
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ports:
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- "5432:5432"
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environment:
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...
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```
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The compose file defines an application with three services `app` and `db`.
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When deploying the application, docker-compose maps the port 4000 of the app container to port 4000 of the host as specified in the file.
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Make sure port 4000 on the host is not already being in use.
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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 "phoenix-postgres_default" with the default driver
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Creating volume "phoenix-postgres_postgres" with default driver
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...
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Successfully built faa13730018d
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Successfully tagged phoenix-postgres_app:latest
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Image for service app 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 phoenix-postgres_db_1 ... done
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Creating phoenix-postgres_app_1 ... done
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```
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## Expected result
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Listing containers must show two 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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a12ab4dc42fb phoenix-postgres_app "sh entrypoint.sh" 22 seconds ago Up 20 seconds 0.0.0.0:4000->4000/tcp phoenix-postgres_app_1
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39c7a3212d51 postgres "docker-entrypoint.s…" 23 seconds ago Up 21 seconds 5432/tcp phoenix-postgres_db_1
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```
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After the application starts, navigate to `http://localhost:4000` in your web browser:
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Stop and remove the containers
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```
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$ docker-compose down
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Stopping phoenix-postgres_app_1 ... done
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Stopping phoenix-postgres_db_1 ... done
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Removing network phoenix-postgres_default
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``` |