Cloudflare Cache's Blind Spot: The Cost of Bypass Rules

Short summary

Blog owner's Cloudflare cache bypass rules combined with Astro's max-age=0 headers caused origin server overload and 100% disk usage. Diagnostic walkthrough using Cloudflare analytics, logs, curl, and browser DevTools reveals the root cause. Solutions involve tuning Cache Rules and adjusting origin headers.

• •Cache bypass rules with max-age=0 headers sent excess traffic to origin despite Cloudflare caching in front
• •Disk filled to 100% with build cache and Docker images; server became unresponsive
• •Diagnostic toolkit: Cloudflare Analytics, Nginx logs, curl with cf-cache-status headers, browser DevTools

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