97 lines
2.8 KiB
Markdown
97 lines
2.8 KiB
Markdown
## Compose sample application
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### TRAEFIK proxy with GO backend
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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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│ └── main.go
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├── compose.yaml
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└── README.md
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```
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[_compose.yaml_](compose.yaml)
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```
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services:
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frontend:
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image: traefik:2.2
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command: --providers.docker --entrypoints.web.address=:80 --providers.docker.exposedbydefault=false
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ports:
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# The HTTP port
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- "80:80"
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volumes:
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# So that Traefik can listen to the Docker events
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- /var/run/docker.sock:/var/run/docker.sock
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depends_on:
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- backend
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backend:
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build: backend
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labels:
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- "traefik.enable=true"
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- "traefik.http.routers.go.rule=Path(`/`)"
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- "traefik.http.services.go.loadbalancer.server.port=80"
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```
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The compose file defines an application with two services `frontend` and `backend`.
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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.
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Make sure port 80 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 "traefik-golang_default" with the default driver
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Building backend
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Step 1/7 : FROM golang:1.13 AS build
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1.13: Pulling from library/golang
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...
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Successfully built 22397f6cd4bc
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Successfully tagged traefik-golang_backend:latest
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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`.
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Pulling frontend (traefik:2.2)...
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2.2: Pulling from library/traefik
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aad63a933944: Pull complete
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f365f1b91ebb: Pull complete
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dc367a6045f5: Pull complete
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ff697159d003: Pull complete
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Digest: sha256:615483752426932469aa2229ef3f0825b33b3ad7e1326dcd388205cb3a74352e
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Status: Downloaded newer image for traefik:2.2
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Creating traefik-golang_backend_1 ... done
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Creating traefik-golang_frontend_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
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NAMES
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e845f50da9e6 traefik:2.2 "/entrypoint.sh --pr…" 55 seconds ago Up 54 seconds 0.0.0.0:80->80/tcp traefik-golang_frontend_1
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e164ffd692e8 traefik-golang_backend "/usr/local/bin/back…" 55 seconds ago Up 54 seconds
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traefik-golang_backend_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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## .
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## ## ## ==
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## ## ## ## ## ===
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/"""""""""""""""""\___/ ===
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{ / ===-
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\______ O __/
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\ \ __/
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\____\_______/
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Hello from Docker!
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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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