Zero Downtime Deployments With Blue-Green Servers

Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering · May 31, 2026 · 13m · transcript

Lucas walks Luna through the blue-green deployment pattern, a strategy that eliminates application downtime during updates by running two identical production environments and switching traffic atomically. They break down the exact steps: provisioning a standby environment, running health checks on the new version, flipping the load balancer, and rolling back instantly if something breaks. Lucas uses a concrete example of a Node.js API service behind an Nginx reverse proxy, explaining how to script the switch with a simple shell loop. Luna asks about database schema changes during a swap —…