https://blog.margrop.net/en/tag/mirror-acceleration/ Recent content in Mirror Acceleration on Margrop Blog Hugo -- gohugo.io en-US Sat, 13 Jun 2026 07:20:00 +0800 https://blog.margrop.net/en/post/docker-registry-mirror-rebuild-2026/ Sat, 13 Jun 2026 07:20:00 +0800 https://blog.margrop.net/en/post/docker-registry-mirror-rebuild-2026/ <blockquote> <p><strong>TL;DR</strong></p> <p>My home lab had a <code>registry:2</code> pull-through cache fronting Docker Hub for years, and it was fine. Then one day pulling a 5 MB <code>alpine:3.19</code> took 5 minutes and 14 seconds. This post is the full forensic log of how I traced the slowdown, evaluated 8 candidate mirrors with real measurements (not vibes), and finished with a 5-line bash script on cron that <strong>auto-fails-over</strong> when the primary mirror goes down. Every number in this article was captured on my own hardware, in my own network, at one specific moment in time.</p> <p>If you also self-host a Docker Hub mirror, or your team runs an internal registry, the Q&amp;A at the bottom will probably save you 3 hours of pain.</p> </blockquote>