Responding to Ghost

What this post added

This post details the process of applying OS-level security patches (glibc vulnerability) to production systems with minimal downtime by leveraging the existing DRBD-based clustered setup for fast failovers. It outlines the steps of updating OS packages and rebooting servers, and specifically highlights how the DRBD-based clustered setup enabled a failover in under a minute to apply updates to the standby server, minimizing downtime for gitlab.com.