92 lines
3.0 KiB
Markdown
92 lines
3.0 KiB
Markdown
## Compose sample application
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### React application with a NodeJS backend and a MySQL database
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Project structure:
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```
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.
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├── backend
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│ ├── Dockerfile
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│ ...
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├── db
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│ └── password.txt
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├── docker-compose.yaml
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├── frontend
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│ ├── ...
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│ └── Dockerfile
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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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backend:
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build: backend
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ports:
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- 80:80
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- 9229:9229
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- 9230:9230
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...
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db:
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image: mysql:8.0.19
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...
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frontend:
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build: frontend
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ports:
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- 3000:3000
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...
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```
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The compose file defines an application with three services `frontend`, `backend` and `db`.
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When deploying the application, docker-compose maps port 3000 of the frontend service container to port 3000 of the host as specified in the file.
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Make sure port 3000 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 "react-express-mysql_default" with the default driver
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Building backend
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Step 1/16 : FROM node:10
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---> aa6432763c11
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...
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Successfully tagged react-express-mysql_frontend:latest
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WARNING: Image for service frontend 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 react-express-mysql_db_1 ... done
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Creating react-express-mysql_backend_1 ... done
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Creating react-express-mysql_frontend_1 ... done
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```
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## Expected result
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Listing containers must show 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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f3e1183e709e react-express-mysql_frontend "docker-entrypoint.s…" 8 minutes ago Up 8 minutes 0.0.0.0:3000->3000/tcp react-express-mysql_frontend_1
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9422da53da76 react-express-mysql_backend "docker-entrypoint.s…" 8 minutes ago Up 8 minutes (healthy) 0.0.0.0:80->80/tcp, 0.0.0.0:9229-9230->9229-9230/tcp react-express-mysql_backend_1
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a434bce6d2be mysql:8.0.19 "docker-entrypoint.s…" 8 minutes ago Up 8 minutes 3306/tcp, 33060/tcp react-express-mysql_db_1
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```
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After the application starts, navigate to `http://localhost:3000` in your web browser.
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The backend service container has the port 80 mapped to 80 on the host.
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```
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$ curl localhost:80
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{"message":"Hello from MySQL 8.0.19"}
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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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Stopping react-express-mysql_frontend_1 ... done
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Stopping react-express-mysql_backend_1 ... done
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Stopping react-express-mysql_db_1 ... done
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Removing react-express-mysql_frontend_1 ... done
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Removing react-express-mysql_backend_1 ... done
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Removing react-express-mysql_db_1 ... done
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Removing network react-express-mysql_default
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```
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