107 lines
3.8 KiB
Markdown
107 lines
3.8 KiB
Markdown
## The Traefik Quickstart (Using Docker)
|
|
|
|
In this quickstart, we'll use [Docker compose](https://docs.docker.com/compose) to create our demo infrastructure.
|
|
|
|
To save some time, you can clone [Traefik's repository](https://github.com/containous/traefik) and use the quickstart files located in the [examples/quickstart](https://github.com/containous/traefik/tree/master/examples/quickstart/) directory.
|
|
|
|
### 1 — Launch Traefik — Tell It to Listen to Docker
|
|
|
|
Create a `docker-compose.yml` file where you will define a `reverse-proxy` service that uses the official Traefik image:
|
|
|
|
```yaml
|
|
version: '3'
|
|
|
|
services:
|
|
reverse-proxy:
|
|
image: traefik # The official Traefik docker image
|
|
command: --api --docker # Enables the web UI and tells Traefik to listen to docker
|
|
ports:
|
|
- "80:80" # The HTTP port
|
|
- "8080:8080" # The Web UI (enabled by --api)
|
|
volumes:
|
|
- /var/run/docker.sock:/var/run/docker.sock #So that Traefik can listen to the Docker events
|
|
```
|
|
|
|
**That's it. Now you can launch Traefik!**
|
|
|
|
Start your `reverse-proxy` with the following command:
|
|
|
|
```shell
|
|
docker-compose up -d reverse-proxy
|
|
```
|
|
|
|
You can open a browser and go to [http://localhost:8080](http://localhost:8080) to see Traefik's dashboard (we'll go back there once we have launched a service in step 2).
|
|
|
|
### 2 — Launch a Service — Traefik Detects It and Creates a Route for You
|
|
|
|
Now that we have a Traefik instance up and running, we will deploy new services.
|
|
|
|
Edit your `docker-compose.yml` file and add the following at the end of your file.
|
|
|
|
```yaml
|
|
# ...
|
|
whoami:
|
|
image: containous/whoami # A container that exposes an API to show its IP address
|
|
labels:
|
|
- "traefik.router.rule=Host:whoami.docker.localhost"
|
|
```
|
|
|
|
The above defines `whoami`: a simple web service that outputs information about the machine it is deployed on (its IP address, host, and so on).
|
|
|
|
Start the `whoami` service with the following command:
|
|
|
|
```shell
|
|
docker-compose up -d whoami
|
|
```
|
|
|
|
Go back to your browser ([http://localhost:8080](http://localhost:8080)) and see that Traefik has automatically detected the new container and updated its own configuration.
|
|
|
|
When Traefik detects new services, it creates the corresponding routes so you can call them ... _let's see!_ (Here, we're using curl)
|
|
|
|
```shell
|
|
curl -H Host:whoami.docker.localhost http://127.0.0.1
|
|
```
|
|
|
|
_Shows the following output:_
|
|
```yaml
|
|
Hostname: 8656c8ddca6c
|
|
IP: 172.27.0.3
|
|
#...
|
|
```
|
|
|
|
### 3 — Launch More Instances — Traefik Load Balances Them
|
|
|
|
Run more instances of your `whoami` service with the following command:
|
|
|
|
```shell
|
|
docker-compose up -d --scale whoami=2
|
|
```
|
|
|
|
Go back to your browser ([http://localhost:8080](http://localhost:8080)) and see that Traefik has automatically detected the new instance of the container.
|
|
|
|
Finally, see that Traefik load-balances between the two instances of your services by running twice the following command:
|
|
|
|
```shell
|
|
curl -H Host:whoami.docker.localhost http://127.0.0.1
|
|
```
|
|
|
|
The output will show alternatively one of the followings:
|
|
|
|
```yaml
|
|
Hostname: 8656c8ddca6c
|
|
IP: 172.27.0.3
|
|
#...
|
|
```
|
|
|
|
```yaml
|
|
Hostname: 8458f154e1f1
|
|
IP: 172.27.0.4
|
|
# ...
|
|
```
|
|
|
|
### 4 — Enjoy Traefik's Magic
|
|
|
|
Now that you have a basic understanding of how Traefik can automatically create the routes to your services and load balance them, it might be time to dive into [the documentation](https://docs.traefik.io/) and let Traefik work for you!
|
|
Whatever your infrastructure is, there is probably [an available Traefik backend](https://docs.traefik.io/#supported-backends) that will do the job.
|
|
|
|
Our recommendation would be to see for yourself how simple it is to enable HTTPS with [Traefik's let's encrypt integration](https://docs.traefik.io/user-guide/examples/#lets-encrypt-support) using the dedicated [user guide](https://docs.traefik.io/user-guide/docker-and-lets-encrypt/).
|