163 lines
6 KiB
Markdown
163 lines
6 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://travis-ci.org/containous/traefik)
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[](https://docs.traefik.io)
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[](http://goreportcard.com/report/containous/traefik)
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[](https://github.com/containous/traefik/blob/master/LICENSE.md)
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[](https://traefik.herokuapp.com)
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[](https://twitter.com/intent/follow?screen_name=traefikproxy)
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Træfik (pronounced like [traffic](https://speak-ipa.bearbin.net/speak.cgi?speak=%CB%88tr%C3%A6f%C9%AAk)) is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
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It supports several backends ([Docker](https://www.docker.com/), [Swarm](https://docs.docker.com/swarm), [Mesos/Marathon](https://mesosphere.github.io/marathon/), [Consul](https://www.consul.io/), [Etcd](https://coreos.com/etcd/), [Zookeeper](https://zookeeper.apache.org), [BoltDB](https://github.com/boltdb/bolt), [Amazon ECS](https://aws.amazon.com/ecs/), [Amazon DynamoDB](https://aws.amazon.com/dynamodb/), Rest API, file...) to manage its configuration automatically and dynamically.
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## Overview
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Imagine that you have deployed a bunch of microservices on your infrastructure. You probably used a service registry (like etcd or consul) and/or an orchestrator (swarm, Mesos/Marathon) to manage all these services.
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If you want your users to access some of your microservices from the Internet, you will have to use a reverse proxy and configure it using virtual hosts or prefix paths:
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- domain `api.domain.com` will point the microservice `api` in your private network
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- path `domain.com/web` will point the microservice `web` in your private network
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- domain `backoffice.domain.com` will point the microservices `backoffice` in your private network, load-balancing between your multiple instances
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But a microservices architecture is dynamic... Services are added, removed, killed or upgraded often, eventually several times a day.
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Traditional reverse-proxies are not natively dynamic. You can't change their configuration and hot-reload easily.
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Here enters Træfik.
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Træfik can listen to your service registry/orchestrator API, and knows each time a microservice is added, removed, killed or upgraded, and can generate its configuration automatically.
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Routes to your services will be created instantly.
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Run it and forget it!
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## Quickstart
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You can have a quick look at Træfik in this [Katacoda tutorial](https://www.katacoda.com/courses/traefik/deploy-load-balancer) that shows how to load balance requests between multiple Docker containers.
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Here is a talk given by [Ed Robinson](https://github.com/errm) at the [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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Here is a talk (in French) given by [Emile Vauge](https://github.com/emilevauge) at the [Devoxx France 2016](http://www.devoxx.fr) conference.
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You will learn fundamental Træfik features and see some demos with Docker, Mesos/Marathon and Let's Encrypt.
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[](http://www.youtube.com/watch?v=QvAz9mVx5TI)
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## Get it
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### Binary
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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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### Docker
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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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## Test it
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You can test Træfik easily using [Docker compose](https://docs.docker.com/compose), with this `docker-compose.yml` file in a folder named `traefik`:
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```yaml
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version: '2'
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services:
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proxy:
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image: traefik
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command: --web --docker --docker.domain=docker.localhost --logLevel=DEBUG
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networks:
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- webgateway
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ports:
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- "80:80"
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- "8080:8080"
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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- /dev/null:/traefik.toml
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networks:
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webgateway:
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driver: bridge
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```
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Start it from within the `traefik` folder:
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docker-compose up -d
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In a browser you may open `http://localhost:8080` to access Træfik's dashboard and observe the following magic.
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Now, create a folder named `test` and create a `docker-compose.yml` in it with this content:
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```yaml
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version: '2'
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services:
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whoami:
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image: emilevauge/whoami
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networks:
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- web
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labels:
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- "traefik.backend=whoami"
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- "traefik.frontend.rule=Host:whoami.docker.localhost"
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networks:
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web:
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external:
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name: traefik_webgateway
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```
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Then, start and scale it in the `test` folder:
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```shell
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docker-compose up -d
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docker-compose scale whoami=2
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```
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Finally, test load-balancing between the two services `test_whoami_1` and `test_whoami_2`:
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```shell
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$ curl -H Host:whoami.docker.localhost http://127.0.0.1
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Hostname: ef194d07634a
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IP: 127.0.0.1
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IP: ::1
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IP: 172.17.0.4
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IP: fe80::42:acff:fe11:4
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GET / HTTP/1.1
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Host: 172.17.0.4:80
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User-Agent: curl/7.35.0
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Accept: */*
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Accept-Encoding: gzip
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X-Forwarded-For: 172.17.0.1
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X-Forwarded-Host: 172.17.0.4:80
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X-Forwarded-Proto: http
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X-Forwarded-Server: dbb60406010d
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$ curl -H Host:whoami.docker.localhost http://127.0.0.1
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Hostname: 6c3c5df0c79a
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IP: 127.0.0.1
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IP: ::1
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IP: 172.17.0.3
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IP: fe80::42:acff:fe11:3
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GET / HTTP/1.1
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Host: 172.17.0.3:80
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User-Agent: curl/7.35.0
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Accept: */*
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Accept-Encoding: gzip
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X-Forwarded-For: 172.17.0.1
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X-Forwarded-Host: 172.17.0.3:80
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X-Forwarded-Proto: http
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X-Forwarded-Server: dbb60406010d
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```
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