Varnish - HTTP Accelerator Crash Course

Varnish is a reverse proxy web accelerator Written in C designed to improve HTTP performance by using server side caching. In this video I’m going to go through how Varnish works, we will spin up a Varnish docker container and finally talk about the pros and cons of this tech. Chapters 0:00 Intro 1:53 Classic HTTP Architecture 3:50 How Varnish Works 7:50 Demo HTTP 18:23 Demo HTTPS 28:43 Varnish Pros 39:26 Varnish Cons Agenda Classic HTTP Architecture How Varnish Works? HTTP Setup - Varnish HTTPS Setup - Varnish with Caddy as TLS Terminator. Varnish Pros & Cons Summary Pros Cache & prefetching documents Resolve DNS hostnames in documents  Rewrite scripts to optimize code Load Balancing  Backend Connection Pooling Varnish Modules (VMODS, e.g. rewrite headers)  Edge side includes (personalized dynamic page) Cons Cache Invalidation Only works on unencrypted HTTP For HTTPS frontend, terminate TLS For HTTPS backend, no solution in Varnish open source Can’t cache POST requests (e.g. GraphQL queries) HTTP/2 backends won’t benefit docker commands docker run --name varnish -p 8080:80 varnish docker cp default.vcl varnish:/etc/varnish default.vcl vcl 4.0; backend default { .host = "husseinmac"; .port = "2015"; } Cards: Connection Pooling 2:15    • Connection Pooling in PostgresSQL with Nod...   Layer 4 vs Layer 7 Load balancing 6:25    • Load balancing in Layer 4 vs Layer 7 with ...   GET vs POST 6:48    • When to use HTTP GET vs POST?   Postgres NodeJS Chrome 8:23    • Building a Web API with Express and Postgr...   Redis 46:13    • Redis In-memory Database Crash Course   TLS Termination 49:35    • SSL/TLS Termination, TLS Forward Proxy Pro...   Resources edge side includes https://www.fastly.com/blog/using-esi... Cache invalidation varnish https://www.smashingmagazine.com/2014... Varnish Doc https://varnish-cache.org/docs/ 🏭 Software Architecture Videos    • Software Architecture   💾 Database Engineering Videos    • Database Engineering   🛰 Network Engineering Videos    • Network Engineering   🏰 Load Balancing and Proxies Videos    • Proxies   🐘 Postgres Videos    • PostgresSQL   🧮 Programming Pattern Videos    • Programming Patterns   🛡 Web Security Videos    • Web Security   🦠 HTTP Videos    • HTTP   🐍 Python Videos    • Python by Example   🔆 Javascript Videos    • Javascript by Example   Support me on PayPal https://bit.ly/33ENps4 Become a Patreon   / hnasr   Stay Awesome, Hussein