Adding simple Traefik example. (#44)

Adding simple Traefik example.

Signed-off-by: lfache <61111030+lfache@users.noreply.github.com>
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lfache 2020-04-07 21:32:26 +02:00 committed by GitHub
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@ -41,6 +41,7 @@ with Spring framework and a Postgres database.
- [`VueJS`](https://github.com/docker/awesome-compose/tree/master/vuejs) - [`VueJS`](https://github.com/docker/awesome-compose/tree/master/vuejs)
- [`Flask`](https://github.com/docker/awesome-compose/tree/master/flask) - [`Flask`](https://github.com/docker/awesome-compose/tree/master/flask)
- [`PHP`](https://github.com/docker/awesome-compose/tree/master/apache-php) - [`PHP`](https://github.com/docker/awesome-compose/tree/master/apache-php)
- [`Traefik`](https://github.com/docker/awesome-compose/tree/master/traefik-golang)
- [`Django`](https://github.com/docker/awesome-compose/tree/master/django) - [`Django`](https://github.com/docker/awesome-compose/tree/master/django)
## Basic setups for different platforms (not production ready - useful for personal use) ## Basic setups for different platforms (not production ready - useful for personal use)
- [`Gitea / PostgreSQL`](https://github.com/docker/awesome-compose/tree/master/gitea-postgres) - [`Gitea / PostgreSQL`](https://github.com/docker/awesome-compose/tree/master/gitea-postgres)

97
traefik-golang/README.md Normal file
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@ -0,0 +1,97 @@
## Compose sample application
### TRAEFIK proxy with GO backend
Project structure:
```
.
├── backend
│   ├── Dockerfile
│   └── main.go
├── docker-compose.yml
└── README.md
```
[_docker-compose.yaml_](docker-compose.yaml)
```
version: "3.7"
services:
frontend:
image: traefik:2.2
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:2.2)...
2.2: Pulling from library/traefik
aad63a933944: Pull complete
f365f1b91ebb: Pull complete
dc367a6045f5: Pull complete
ff697159d003: Pull complete
Digest: sha256:615483752426932469aa2229ef3f0825b33b3ad7e1326dcd388205cb3a74352e
Status: Downloaded newer image for traefik:2.2
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
e845f50da9e6 traefik:2.2 "/entrypoint.sh --pr…" 55 seconds ago Up 54 seconds 0.0.0.0:80->80/tcp traefik-golang_frontend_1
e164ffd692e8 traefik-golang_backend "/usr/local/bin/back…" 55 seconds ago Up 54 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
```

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FROM golang:1.13 AS build
WORKDIR /compose/hello-docker
COPY main.go main.go
RUN CGO_ENABLED=0 go build -o backend main.go
FROM scratch
COPY --from=build /compose/hello-docker/backend /usr/local/bin/backend
CMD ["/usr/local/bin/backend"]

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package main
import (
"fmt"
"log"
"net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Println(r.URL.RawQuery)
fmt.Fprintf(w, `
## .
## ## ## ==
## ## ## ## ## ===
/"""""""""""""""""\___/ ===
{ / ===-
\______ O __/
\ \ __/
\____\_______/
Hello from Docker!
`)
}
func main() {
http.HandleFunc("/", handler)
log.Fatal(http.ListenAndServe(":80", nil))
}

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@ -0,0 +1,19 @@
version: "3.7"
services:
frontend:
image: traefik:2.2
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"