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One of the key challenges in managing a cluster is ensuring seamless upgrades and efficient rollbacks without disrupting the services. This is particularly vital in production environments where uptime and stability are crucial. Automation in such scenarios reduces human error, saves time, and can vastly improve system consistency and reliability. In this guide, we explore how to automate cluster upgrades and rollbacks using Linux Bash scripts, taking advantage of powerful shell scripting and utility tools available in a Linux environment. Before diving into the scripts themselves, it's essential to have a basic understanding of cluster management.