devops-basics

HA proxy basics demo

1. Labs stack

• nginx-webserver1: An Ubuntu VM running in nginx webserver.
• nginx-webserver2: An Ubuntu VM running in nginx webserver.
• haproxy: HA proxy points to 2 these web servers.

2. Setup

Prerequisites

• Docker + Docker Compose

Build and run the containers

• Option-1: Build and run in background (Recommend)

cd devops-basics/topics/haproxy/basic/
docker-compose up --build -d

# To stop and remove contaienr, run:
docker compose down

• Option-2: Run and verbose the logs

cd devops-basics/topics/haproxy/basic/
docker-compose up --build

# To stop, press 'Ctrl + C'

3. Explore the HA proxy

• Access the HA Proxy at http://localhost:6081 (You can replace 6081 by the port work on your machine!)

• Refresh the page multiple time and you would see that the HA Proxy route to nginx-webserver1 and nginx-webserver2 in Round Robin mode.

  

• Now try to stop the nginx-webserver1 and refresh the page http://localhost:6081, it will check and only route to nginx-webserver2

  docker stop nginx-webserver1
  

  

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