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Hacker News·Sep 8·5 min read
PyPI Blog: Incident File Hosting Errors
TL;DR
Intermittent 502 and 503 errors affecting PyPI users were traced to a misconfigured cache node in Fastly's network. The issues have been resolved, restoring full download functionality since August 28.
✦ Why It Matters
Ensure your cache configurations are regularly reviewed to prevent similar service disruptions.
Key Takeaways
- Monitor CDN configurations to prevent similar issues.
- Implement caching for CI jobs to reduce dependency on PyPI.
- Report any file hosting issues with detailed information.
- Consider supporting the Python Software Foundation for infrastructure improvements.
How It Works
PyPI uses Fastly as a CDN to serve files, primarily from Backblaze B2 due to cost benefits. When a file is requested, Fastly first checks B2; if it fails, it falls back to Amazon S3.
This setup is designed to minimize costs while ensuring reliable file delivery.