Introduction Let’s Encrypt is a Certificate Authority (CA) that facilitates obtaining and installing free TLS/SSL certificates, thereby enabling encrypted HTTPS on web servers. It streamlines the process by providing a software client, Certbot, that attempts to automate most (if not all) of the required steps. Currently, the entire process of obtaining and installing a certificate is fully automated on both Apache…
High availability is crucial for critical systems that should remain accessible even in the face of hardware or software failures. Pacemaker and Corosync are open-source tools that allow you to create a high-availability cluster on your Ubuntu servers. In this tutorial, I will guide you through the process of setting up a high-availability cluster using Pacemaker and Corosync on Ubuntu,…
When you have a load balancer, a common challenge comes in achieving availability, especially where continuous service availability is required. Even a load balancer can fail you if you have not incorporated a way to ensure its availability, and that’s where Keepalived comes into play. It is an open-source framework that is designed for Linux systems to achieve reliability by…
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