The Internet is Hostile: Building a More Resilient Network

What this post added

This post details Cloudflare's efforts to build a more resilient network by actively monitoring the internet's health using its global network infrastructure. It introduces the concept of 'internet brownouts' and explains how Cloudflare leverages BGP, custom monitoring tools, and open-source software (ZeroMQ, Prometheus, OpenTSDB) to detect and automatically mitigate network issues. The post highlights the development of an automated mitigation system, inspired by DDoS mitigation techniques, using tools like Napalm and Salt to manage network devices and reroute traffic during failures, ultimately improving performance and reducing customer errors.