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The Customize Windows > Computer and Internet > Cloud Computing > Traefik : Reverse Proxy for Docker Containers on Ubuntu 16.04

By Abhishek Ghosh September 27, 2017 12:13 pm Updated on September 27, 2017

Traefik : Reverse Proxy for Docker Containers on Ubuntu 16.04

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In our previous guides, we focussed on basics around Docker in Docker Tutorials as part 1, part 2, part 3 and part 4. With Traefik, we can manage configuration dynamically. Here is a Guide on How to Install and Configure Traefik as Reverse Proxy for Docker Containers on Ubuntu 16.04. Official Traefik website is here :

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https://traefik.io

Of course they have a Docker image too :

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https://hub.docker.com/_/traefik/

Traefik - Reverse Proxy for Docker Containers on Ubuntu 16-04

 

Traefik : Reverse Proxy for Docker Containers on Ubuntu 16.04

 

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First update and upgrade :

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apt update
apt upgrade

Then install Apache Utilities for easy generation of password :

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apt install apache2-utils

Then generate the password with htpasswd. In our below example command, password is your password (which you should change) for the user admin (which you should change) :

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htpasswd -nb admin password

You’ll get an encrypted output. Copy-paste and save it. We need to create a configuration file named traefik.toml. We can create it by opening a new file :

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nano traefik.toml

We will write this entry :

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defaultEntryPoints = ["http", "https"]

Next, we need to configure the way to get access to a dashboard interface. This is where we will need to paste the output from the htpasswd command :

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defaultEntryPoints = ["http", "https"]
 
[web]
address = ":8080"
  [web.auth.basic]
  users = ["admin:your_encrypted_password"]

We will add more entries for the configuration file :

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defaultEntryPoints = ["http", "https"]
 
[web]
address = ":8080"
  [web.auth.basic]
  users = ["admin:your_encrypted_password"]
 
[entryPoints]
  [entryPoints.http]
  address = ":80"
    [entryPoints.http.redirect]
      entryPoint = "https"
  [entryPoints.https]
  address = ":443"
    [entryPoints.https.tls]
 
[acme]
email = "email@example.com"
storage = "acme.json"
entryPoint = "https"
onHostRule = true
onDemand = false

Next we need to create a Docker network for the proxy to share with containers :

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docker network create example1

After starting Traefik container, we will add it to this network. Then you can add your other containers to this network later for Traefik to proxy. Create an empty file for Let’s Encrypt information :

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touch acme.json
chmod 600 acme.json

Finally you’ll run command to run Traefik where test.yourdomain.com is your subdomain for Traefik :

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docker run -d
  -v /var/run/docker.sock:/var/run/docker.sock
  -v $PWD/traefik.toml:/traefik.toml
  -v $PWD/acme.json:/acme.json
  -p 80:80
  -p 443:443
  -l traefik.frontend.rule=Host:test.yourdomain.com
  -l traefik.port=8080
  --network proxy
  --name traefik
  traefik:1.3.6-alpine --docker

You will manage web applications with Docker Compose using a docker-compose.yml file:

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nano docker-compose.yml

With the content :

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docker-compose.yml
version: "3"
 
networks:
  proxy:
    external: true
  internal:
    external: false
services:
  blog:
    image: wordpress:4.7.5-apache
    environment:
      WORDPRESS_DB_PASSWORD:
    labels:
      - traefik.backend=blog
      - traefik.frontend.rule=Host:blog.yourdomain.com
      - traefik.docker.network=proxy
      - traefik.port=80
    networks:
      - internal
      - proxy
    depends_on:
      - mysql
  mysql:
    image: mysql:5.7
    environment:
      MYSQL_ROOT_PASSWORD:
    networks:
      - internal
    labels:
      - traefik.enable=false

The above is an example to use WordPress official Docker image. Run this commands substituting with real value :

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export WORDPRESS_DB_PASSWORD=database_password
export MYSQL_ROOT_PASSWORD=admin_database_password

Now run the containers using docker-compose:

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docker-compose up -d

Now if you go to that Traefik subdomain, you’ll see the dashboard. You have to install the web software for other subdomains like you normally do.

Tagged With traefik docker compose
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About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Orthopaedic Surgeon, Author and Blogger. You can keep touch with him on Google Plus - Abhishek Ghosh1 and on Twitter - @AbhishekCTRL.

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About This Article

Title: Traefik : Reverse Proxy for Docker Containers on Ubuntu 16.04
September 27, 2017
Author: Abhishek Ghosh
Subjects: Cloud Computing, Computer and Internet
Is Part Of:

TheCustomizeWindows, September 27, 2017, Vol.1(01),
p.1–39075 [IoT Ready Journal]

Source:The Customize Windows
ISSN: 0019-5847 ;
E-ISSN: 0019-5847 ;
Publisher: jima.in

Cite this article as: Abhishek Ghosh, "Traefik : Reverse Proxy for Docker Containers on Ubuntu 16.04," in The Customize Windows, September 27, 2017, April 27, 2018, https://thecustomizewindows.com/2017/09/traefik-reverse-proxy-docker-containers-ubuntu-16-04/.
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