201 lines
8.7 KiB
Markdown
201 lines
8.7 KiB
Markdown
<p align="center">
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<img src="img/traefik.logo.png" alt="Træfik" title="Træfik" />
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</p>
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[](https://semaphoreci.com/containous/traefik)
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[](/)
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[](https://goreportcard.com/report/github.com/containous/traefik)
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[](https://github.com/containous/traefik/blob/master/LICENSE.md)
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[](https://slack.traefik.io)
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[](https://twitter.com/intent/follow?screen_name=traefikproxy)
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Træfik is a modern HTTP reverse proxy and load balancer that makes deploying microservices easy.
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Træfik integrates with your existing infrastructure components ([Docker](https://www.docker.com/), [Swarm mode](https://docs.docker.com/engine/swarm/), [Kubernetes](https://kubernetes.io), [Marathon](https://mesosphere.github.io/marathon/), [Consul](https://www.consul.io/), [Etcd](https://coreos.com/etcd/), [Rancher](https://rancher.com), [Amazon ECS](https://aws.amazon.com/ecs), ...) and configures itself automatically and dynamically.
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Pointing Træfik at your orchestrator should be the _only_ configuration step you need.
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## Overview
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Imagine that you have deployed a bunch of microservices with the help of an orchestrator (like Swarm or Kubernetes) or a service registry (like etcd or consul).
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Now you want users to access these microservices, and you need a reverse proxy.
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Traditional reverse-proxies require that you configure _each_ route that will connect paths and subdomains to _each_ microservice.
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In an environment where you add, remove, kill, upgrade, or scale your services _many_ times a day, the task of keeping the routes up to date becomes tedious.
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**This is when Træfik can help you!**
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Træfik listens to your service registry/orchestrator API and instantly generates the routes so your microservices are connected to the outside world -- without further intervention from your part.
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**Run Træfik and let it do the work for you!**
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_(But if you'd rather configure some of your routes manually, Træfik supports that too!)_
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## Features
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- Continuously updates its configuration (No restarts!)
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- Supports multiple load balancing algorithms
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- Provides HTTPS to your microservices by leveraging [Let's Encrypt](https://letsencrypt.org) (wildcard certificates support)
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- Circuit breakers, retry
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- High Availability with cluster mode (beta)
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- See the magic through its clean web UI
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- Websocket, HTTP/2, GRPC ready
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- Provides metrics (Rest, Prometheus, Datadog, Statsd, InfluxDB)
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- Keeps access logs (JSON, CLF)
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- Fast
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- Exposes a Rest API
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- Packaged as a single binary file (made with :heart: with go) and available as a [tiny](https://microbadger.com/images/traefik) [official](https://hub.docker.com/r/_/traefik/) docker image
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## Supported Providers
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- [Docker](/configuration/backends/docker/) / [Swarm mode](/configuration/backends/docker/#docker-swarm-mode)
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- [Kubernetes](/configuration/backends/kubernetes/)
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- [Mesos](/configuration/backends/mesos/) / [Marathon](/configuration/backends/marathon/)
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- [Rancher](/configuration/backends/rancher/) (API, Metadata)
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- [Azure Service Fabric](/configuration/backends/servicefabric/)
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- [Consul Catalog](/configuration/backends/consulcatalog/)
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- [Consul](/configuration/backends/consul/) / [Etcd](/configuration/backends/etcd/) / [Zookeeper](/configuration/backends/zookeeper/) / [BoltDB](/configuration/backends/boltdb/)
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- [Eureka](/configuration/backends/eureka/)
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- [Amazon ECS](/configuration/backends/ecs/)
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- [Amazon DynamoDB](/configuration/backends/dynamodb/)
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- [File](/configuration/backends/file/)
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- [Rest](/configuration/backends/rest/)
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## 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 its 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](/) and let Træfik work for you!
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Whatever your infrastructure is, there is probably [an available Træfik provider](/#supported-providers) 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](/user-guide/examples/#lets-encrypt-support) using the dedicated [user guide](/user-guide/docker-and-lets-encrypt/).
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## Resources
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Here is a talk given by [Emile Vauge](https://github.com/emilevauge) at [GopherCon 2017](https://gophercon.com).
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You will learn Træfik basics in less than 10 minutes.
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[](https://www.youtube.com/watch?v=RgudiksfL-k)
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Here is a talk given by [Ed Robinson](https://github.com/errm) at [ContainerCamp UK](https://container.camp) conference.
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You will learn fundamental Træfik features and see some demos with Kubernetes.
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[](https://www.youtube.com/watch?v=aFtpIShV60I)
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## Downloads
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### The Official Binary File
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You can grab the latest binary from the [releases](https://github.com/containous/traefik/releases) page and just run it with the [sample configuration file](https://raw.githubusercontent.com/containous/traefik/master/traefik.sample.toml):
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```shell
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./traefik -c traefik.toml
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```
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### The Official Docker Image
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Using the tiny Docker image:
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```shell
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docker run -d -p 8080:8080 -p 80:80 -v $PWD/traefik.toml:/etc/traefik/traefik.toml traefik
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```
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