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May 27, 2024

Let's build a CDN - Part 1

24 minutes

This started as a conversation between James A Rosen & Gerhard in August 2023. Several months later, it evolved into a few epic pairing sessions captured in these GitHub threads:

thechangelog#480 (reply in thread)
thechangelog#486

The last pairing session eventually lead to 🎧 Kaizen! Should we build a CDN? This is the follow-up to that. How far did we get in 1 hour?

LINKS

The 5-hour CDN
varnish - Docker Official Image
Introduction to Varnish
Magento2 Varnish config
Magento Internals: Cache Purging and Cache Tags
Varnish modules

EPISODE CHAPTERS

(00:00) - Intro

(02:08) - The 5-hour CDN

(03:44) - Varnish container image

(05:00) - Varnish container image command

(06:31) - Local-friendly Varnish container image

(06:44) - Varnish command-line options

(08:30) - Varnish parameters

(09:45) - Experimenting with Varnish locally

(12:36) - Varnish purging

(15:22) - Backend fetch failed

(16:20) - Varnish debug mode & logs

(17:29) - Why can't we query the backend?

(21:08) - Why is the backend sick?

(22:49) - That's the problem!

...more

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By Gerhard Lazu