Configuring HTTP Load Balancing Using HAProxy

For this objective, we're going to configure HTTP load balancing for our 2 sites.

Before we start, check the status of our nginx containers to make sure they're up and running.

Perform the following:

• Configure 2 HTTP frontends, 1 for each site.
  • Make the first site available on port 8000.
  • Make the second site available on port 8100.
• Configure 2 HTTP backends, one for each site.
  • Use roundrobin load balancing for each site.
  • Add all 3 nginx containers for each site to the backend.
• Add a configuration block for the stats web page.
  • Use port 8050 for the stats page.
  • Set the mode to http.
• Enable and start the haproxy service. Check your work.
  • Make sure the haproxy service is enabled and started.
  • Use curl to confirm that you can connect to the following and that load balancing is working:
    • http://127.0.0.1:8000/test.txt
    • http://127.0.0.1:8100/test.txt
  • Confirm you can connect to the stats web page on port 8050.

For this objective, we're going to test round-robin load balancing on both sites and confirm it is working as intended.

Perform the following:

• We're going to see how HAProxy handles down servers.
  • Use the podman command to stop the site1_server3 container.
  • Use the podman command to stop the site2_server2 container.
  • Use the podman command to show the status of all containers.
    • Confirm the 2 containers you stopped are exited.
  • Reload the sites using a browser or curl, and confirm things still work and that traffic is routed around the down servers.
  • See the change in the stats web page. Refresh and see if HAProxy has picked up the down servers.
  • Use the podman command to stop all the remaining containers.
    • See the change in the stats web page. Refresh and see if HAProxy has picked up the down servers.
    • Try to connect to each site. See how HAProxy responds.
• Use the podman command to start all the containers.
  • Use the podman command to show the status of all containers.
  • See the change in the stats web page. Refresh and see if HAProxy has picked up the up servers.
  • Try to connect to each site. See how HAProxy responds.