## Compose sample application ### TRAEFIK proxy with GO backend Project structure: ``` . ├── backend │   ├── Dockerfile │   └── main.go ├── compose.yaml └── README.md ``` [_compose.yaml_](compose.yaml) ``` services: frontend: image: traefik:2.6 command: --providers.docker --entrypoints.web.address=:80 --providers.docker.exposedbydefault=false ports: # The HTTP port - "80:80" volumes: # So that Traefik can listen to the Docker events - /var/run/docker.sock:/var/run/docker.sock depends_on: - backend backend: build: backend labels: - "traefik.enable=true" - "traefik.http.routers.go.rule=Path(`/`)" - "traefik.http.services.go.loadbalancer.server.port=80" ``` The compose file defines an application with two services `frontend` and `backend`. When deploying the application, docker compose maps port 80 of the frontend service container to the same port of the host as specified in the file. Make sure port 80 on the host is not already being in use. ## Deploy with docker compose ``` $ docker compose up -d Creating network "traefik-golang_default" with the default driver Building backend Step 1/7 : FROM golang:1.13 AS build 1.13: Pulling from library/golang ... Successfully built 22397f6cd4bc Successfully tagged traefik-golang_backend:latest WARNING: Image for service backend was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`. Pulling frontend (traefik:2.6)... 2.6: Pulling from library/traefik 8663204ce13b: Pull complete 1a6b5dadc224: Pull complete c7891231da41: Pull complete 9e3c91eff4e8: Pull complete Digest: sha256:9dc508fe4f1516b81ec97ed37dd4f3b406f02eda72c7c0dcd9f74d23fbc82239 Status: Downloaded newer image for traefik:2.6 Creating traefik-golang_backend_1 ... done Creating traefik-golang_frontend_1 ... done ``` ## Expected result Listing containers must show two containers running and the port mapping as below: ``` $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e0a0f3191042 traefik:2.6 "/entrypoint.sh --pr…" 42 seconds ago Up 42 seconds 0.0.0.0:80->80/tcp, :::80->80/tcp traefik-golang-frontend-1 662d1506f1fd traefik-golang_backend "/usr/local/bin/back…" 42 seconds ago Up 42 seconds traefik-golang-backend-1 ``` After the application starts, navigate to `http://localhost:80` in your web browser or run: ``` $ curl localhost:80 ## . ## ## ## == ## ## ## ## ## === /"""""""""""""""""\___/ === { / ===- \______ O __/ \ \ __/ \____\_______/ Hello from Docker! ``` Stop and remove the containers ``` $ docker compose down ``` ## Use with Docker Development Environments You can use this sample with the Dev Environments feature of Docker Desktop. To develop directly the backend service inside containers, you just need to use the https git url of the sample: `https://github.com/docker/awesome-compose/tree/master/traefik-golang` ![page](../dev-envs.png)