106 lines
No EOL
3.8 KiB
Markdown
106 lines
No EOL
3.8 KiB
Markdown
## The Træfik Quickstart (Using Docker)
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In this quickstart, we'll use [Docker compose](https://docs.docker.com/compose) to create our demo infrastructure.
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To save some time, you can clone [Træfik'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.
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### 1 — Launch Træfik — Tell It to Listen to Docker
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Create a `docker-compose.yml` file where you will define a `reverse-proxy` service that uses the official Træfik image:
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```yaml
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version: '3'
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services:
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reverse-proxy:
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image: traefik #The official Traefik docker image
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command: --api --docker #Enables the web UI and tells Træfik to listen to docker
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ports:
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- "80:80" #The HTTP port
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- "8080:8080" #The Web UI (enabled by --api)
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock #So that Traefik can listen to the Docker events
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```
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**That's it. Now you can launch Træfik!**
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Start your `reverse-proxy` with the following command:
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```shell
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docker-compose up -d reverse-proxy
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```
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You can open a browser and go to [http://localhost:8080](http://localhost:8080) to see Træfik's dashboard (we'll go back there once we have launched a service in step 2).
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### 2 — Launch a Service — Træfik Detects It and Creates a Route for You
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Now that we have a Træfik instance up and running, we will deploy new services.
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Edit your `docker-compose.yml` file and add the following at the end of your file.
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```yaml
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# ...
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whoami:
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image: emilevauge/whoami #A container that exposes an API to show it's IP address
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labels:
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- "traefik.frontend.rule=Host:whoami.docker.localhost"
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```
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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).
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Start the `whoami` service with the following command:
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```shell
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docker-compose up -d whoami
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```
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Go back to your browser ([http://localhost:8080](http://localhost:8080)) and see that Træfik has automatically detected the new container and updated its own configuration.
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When Traefik detects new services, it creates the corresponding routes so you can call them ... _let's see!_ (Here, we're using curl)
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```shell
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curl -H Host:whoami.docker.localhost http://127.0.0.1
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```
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_Shows the following output:_
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```yaml
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Hostname: 8656c8ddca6c
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IP: 172.27.0.3
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#...
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```
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### 3 — Launch More Instances — Traefik Load Balances Them
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Run more instances of your `whoami` service with the following command:
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```shell
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docker-compose up -d --scale whoami=2
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```
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Go back to your browser ([http://localhost:8080](http://localhost:8080)) and see that Træfik has automatically detected the new instance of the container.
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Finally, see that Træfik load-balances between the two instances of your services by running twice the following command:
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```shell
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curl -H Host:whoami.docker.localhost http://127.0.0.1
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```
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The output will show alternatively one of the followings:
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```yaml
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Hostname: 8656c8ddca6c
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IP: 172.27.0.3
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#...
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```
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```yaml
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Hostname: 8458f154e1f1
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IP: 172.27.0.4
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# ...
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```
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### 4 — Enjoy Træfik's Magic
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Now that you have a basic understanding of how Træfik 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 Træfik work for you! Whatever your infrastructure is, there is probably [an available Træfik backend](https://docs.traefik.io/configuration/backends/available) that will do the job.
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Our recommendation would be to see for yourself how simple it is to enable HTTPS with [Træfik'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/). |