163 lines
6.1 KiB
Markdown
163 lines
6.1 KiB
Markdown
<p align="center">
|
|
<img src="img/traefik.logo.png" alt="Træfik" title="Træfik" />
|
|
</p>
|
|
|
|
[](https://semaphoreci.com/containous/traefik)
|
|
[](https://docs.traefik.io)
|
|
[](http://goreportcard.com/report/containous/traefik)
|
|
[](https://github.com/containous/traefik/blob/master/LICENSE.md)
|
|
[](https://traefik.herokuapp.com)
|
|
[](https://twitter.com/intent/follow?screen_name=traefikproxy)
|
|
|
|
|
|
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.
|
|
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.
|
|
|
|
## Overview
|
|
|
|
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.
|
|
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:
|
|
|
|
- domain `api.domain.com` will point the microservice `api` in your private network
|
|
- path `domain.com/web` will point the microservice `web` in your private network
|
|
- domain `backoffice.domain.com` will point the microservices `backoffice` in your private network, load-balancing between your multiple instances
|
|
|
|
But a microservices architecture is dynamic... Services are added, removed, killed or upgraded often, eventually several times a day.
|
|
|
|
Traditional reverse-proxies are not natively dynamic. You can't change their configuration and hot-reload easily.
|
|
|
|
Here enters Træfik.
|
|
|
|
|
|
|
|
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.
|
|
Routes to your services will be created instantly.
|
|
|
|
Run it and forget it!
|
|
|
|
|
|
## Quickstart
|
|
|
|
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.
|
|
|
|
Here is a talk given by [Ed Robinson](https://github.com/errm) at the [ContainerCamp UK](https://container.camp) conference.
|
|
You will learn fundamental Træfik features and see some demos with Kubernetes.
|
|
|
|
[](https://www.youtube.com/watch?v=aFtpIShV60I)
|
|
|
|
Here is a talk (in French) given by [Emile Vauge](https://github.com/emilevauge) at the [Devoxx France 2016](http://www.devoxx.fr) conference.
|
|
You will learn fundamental Træfik features and see some demos with Docker, Mesos/Marathon and Let's Encrypt.
|
|
|
|
[](http://www.youtube.com/watch?v=QvAz9mVx5TI)
|
|
|
|
## Get it
|
|
|
|
### Binary
|
|
|
|
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):
|
|
|
|
```shell
|
|
./traefik -c traefik.toml
|
|
```
|
|
|
|
### Docker
|
|
|
|
Using the tiny Docker image:
|
|
|
|
```shell
|
|
docker run -d -p 8080:8080 -p 80:80 -v $PWD/traefik.toml:/etc/traefik/traefik.toml traefik
|
|
```
|
|
|
|
## Test it
|
|
|
|
You can test Træfik easily using [Docker compose](https://docs.docker.com/compose), with this `docker-compose.yml` file in a folder named `traefik`:
|
|
|
|
```yaml
|
|
version: '2'
|
|
|
|
services:
|
|
proxy:
|
|
image: traefik
|
|
command: --web --docker --docker.domain=docker.localhost --logLevel=DEBUG
|
|
networks:
|
|
- webgateway
|
|
ports:
|
|
- "80:80"
|
|
- "8080:8080"
|
|
volumes:
|
|
- /var/run/docker.sock:/var/run/docker.sock
|
|
- /dev/null:/traefik.toml
|
|
|
|
networks:
|
|
webgateway:
|
|
driver: bridge
|
|
```
|
|
|
|
Start it from within the `traefik` folder:
|
|
|
|
docker-compose up -d
|
|
|
|
In a browser you may open `http://localhost:8080` to access Træfik's dashboard and observe the following magic.
|
|
|
|
Now, create a folder named `test` and create a `docker-compose.yml` in it with this content:
|
|
|
|
```yaml
|
|
version: '2'
|
|
|
|
services:
|
|
whoami:
|
|
image: emilevauge/whoami
|
|
networks:
|
|
- web
|
|
labels:
|
|
- "traefik.backend=whoami"
|
|
- "traefik.frontend.rule=Host:whoami.docker.localhost"
|
|
|
|
networks:
|
|
web:
|
|
external:
|
|
name: traefik_webgateway
|
|
```
|
|
|
|
Then, start and scale it in the `test` folder:
|
|
|
|
```shell
|
|
docker-compose up -d
|
|
docker-compose scale whoami=2
|
|
```
|
|
|
|
Finally, test load-balancing between the two services `test_whoami_1` and `test_whoami_2`:
|
|
|
|
```shell
|
|
$ curl -H Host:whoami.docker.localhost http://127.0.0.1
|
|
Hostname: ef194d07634a
|
|
IP: 127.0.0.1
|
|
IP: ::1
|
|
IP: 172.17.0.4
|
|
IP: fe80::42:acff:fe11:4
|
|
GET / HTTP/1.1
|
|
Host: 172.17.0.4:80
|
|
User-Agent: curl/7.35.0
|
|
Accept: */*
|
|
Accept-Encoding: gzip
|
|
X-Forwarded-For: 172.17.0.1
|
|
X-Forwarded-Host: 172.17.0.4:80
|
|
X-Forwarded-Proto: http
|
|
X-Forwarded-Server: dbb60406010d
|
|
|
|
$ curl -H Host:whoami.docker.localhost http://127.0.0.1
|
|
Hostname: 6c3c5df0c79a
|
|
IP: 127.0.0.1
|
|
IP: ::1
|
|
IP: 172.17.0.3
|
|
IP: fe80::42:acff:fe11:3
|
|
GET / HTTP/1.1
|
|
Host: 172.17.0.3:80
|
|
User-Agent: curl/7.35.0
|
|
Accept: */*
|
|
Accept-Encoding: gzip
|
|
X-Forwarded-For: 172.17.0.1
|
|
X-Forwarded-Host: 172.17.0.3:80
|
|
X-Forwarded-Proto: http
|
|
X-Forwarded-Server: dbb60406010d
|
|
```
|