Scaling past 10K+ custom domains at Hashnode using Vercel Domain API

on YouTube ↗10m

" summary

Hashnode scales 10,000+ custom domains by replacing a homegrown CDN (OpenResty then Caddy with LetsEncrypt) with the Vercel Domain API. The pipeline makes API calls to projects/domains, asks users to add a CNAME to Vercel’s anycast endpoint, and relies on Vercel to issue and renew SSL. A 500‑domain limit is handled with account‑level domains and two projects plus a reverse proxy rewrite so domains remain stable across deployments.

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" chapters (13)

1. 0:00Intro
2. 0:34Hashnode stats
3. 0:50The challenge
4. 1:17Solution 1 Digital Ocean
5. 2:39Solution 2 DIY
6. 3:47Evaluating Cadd
7. 4:14Plate Mode
8. 4:36Caddy Mode
9. 5:14Choosing Vercel
10. 5:36How it works
11. 6:37Managing custom domains
12. 8:26Demo
13. 9:20Conclusion

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