Today's System-Wide Upgrade

What this post added

This post details a system-wide migration of over half a million websites to a new provisioning system. The migration involved rebalancing sites to new IP address pools, seamlessly issuing and redeploying SSL certificates (including custom ones), and addressing two specific issues: a staging SSL environment conflict causing temporary SSL errors for a handful of customers, and a brief period of unreachability for a small number of sites due to an incorrectly recorded null route on an IP address that had been under DDoS attack. The new system provides significantly more flexibility and robustness, enabling features like dynamic site tagging for content restrictions and attack mitigation, and improved isolation of attacked sites.