How To Install HAProxy on Ubuntu 16.04 LTS

Install HAProxy on Ubuntu 16.04 LTS

In this tutorial, we will show you how to install and configuration HAProxy on Ubuntu 16.04 LTS. For those of you who didn’t know, HAProxy is a free HTTP/TCP high availability load balancer and proxy server. It spreads requests among multiple servers to mitigate issues resulting from a single server failure. HA Proxy is used by a number of high-profile websites including GitHub, Bitbucket, Stack Overflow, Reddit, Tumblr, Twitter and Tuenti and is used in the OpsWorks product from Amazon Web Services.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation HAProxy on a Ubuntu 16.04 (Xenial Xerus) server.

Install HAProxy on Ubuntu 16.04 LTS

Step 1. First, make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.

Step 2. Network Details.

Below is our network server. There are 3 web servers running with Apache2 and listening on port 80 and one HAProxy server:

Step 3. Installing HAProxy.

Now install HAProxy with the following command:

After the installation you can double-check the installed version number with the following:

Step 4. Configuring HAProxy.

We have to modify the configuration file of haproxy i.e. /etc/haproxy/haproxy.cfg as per our requirement. (Change this configuration as your network requirements). For more configuration details check this URL.

Since you have done with all necessary configurations for the proxy server, verify configuration file before restarting service using the following command:

If above command return output as “configuration file is valid” then restart HAProxy service:

Step 5. Accessing HAProxy.

Open your favourite browser and access port 80 on IP (as configured above) in a web browser and hit refresh. You will see that HAProxy is sending requests to backend server one by one (as per round-robin algorithm).

Congratulations! You have successfully installed HAProxy. Thanks for using this tutorial for installing HAProxy load balancing on Ubuntu 16.04 LTS  (Xenial Xerus) system. For additional help or useful information, we recommend you to check the official HAProxy website.

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