franitel/haproxy repository overview

⁠You can see how to use this container in my blog:

⁠https://franitel.github.io/loadbalancer/2017/05/01/deploy-haproxy-using-docker-compose/⁠

⁠Introduction

To deploy our haproxy we are going to use docker-compose. If you need to install docker compose you can do:

apt-get install python-pip
pip install docker-compose

⁠Environment

For this example we have 5 servers: 1 HAproxy server. 4 nginx servers.

The HAproxy is listening on port 80, when we recei

⁠Deploy haproxy with 4 nginx servers

1. Clone my git repository with all files git clone https://github.com/franitel/load-balancer.git⁠

2) Go to haproxy folder

cd haproxy

Now you can see some files, for now only we need to see the [docker-compose.yml](https://raw.githubusercontent.co

haproxy: image: haproxy:1.6 volumes: - ./haproxy:/haproxy-override - ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro links: - nginx1 - nginx2 - nginx3 - nginx4 ports: - "80:80" - "70:70"

nginx1: build: ./web expose: - 80 nginx2: build: ./web expose: - 80 nginx3: build: ./web expose: - 80 nginx4: build: ./web expose: - 80

Here we can see all our environment
3) Run the docker-compose command

docker-compose up -d

4) In http://localhost:70 port you can see the haproxy statistics

    user:     user
    password: pass


5) To check that all is working fine you can do:

docker-compose ps

6) Go to http://localhost

Now you can refrest the website (F5) and on each refresch you will see the container hostname in the website, in

* e40c136075cd
* d282ca09a79e
* c9e45c1bb0c3
* 41442643aefd

7) Here you have the haproxy.cfg file

global log 127.0.0.1 local0 log 127.0.0.1 local1 notice maxconn 4096

defaults log global mode http option httplog option dontlognull timeout connect 5000ms timeout client 50000ms timeout server 50000ms

listen stats bind 0.0.0.0:70 mode http stats enable stats hide-version stats scope . stats realm Haproxy\ Statistics stats uri / stats auth user:pass

frontend balancer bind 0.0.0.0:80 mode http default_backend web_backends

backend web_backends mode http option forwardfor balance roundrobin server nginx1 nginx1:80 check server nginx2 nginx2:80 check server nginx3 nginx3:80 check server nginx4 nginx4:80 check option httpchk GET / http-check expect status 200