Tutorials

Cache invalidation: Step-by-step tutorial on how to invalidate and purge your cache.
Caching POST requests: How to cache POST requests with Varnish.
Configuring systemd services: Step-by-step tutorial on how to manage configuration of systemd services.
DNS based GSLB (Global Server Load Balancer): This tutorial shows how PowerDNS can be configured as a Global Server Load Balancer in front of a geographically distributed cluster of Varnish nodes.
Enabling logging with varnishncsa: Step-by-step tutorial to enable request logging with varnishncsa.
Getting started: How to install and get started with Varnish.
Let's Encrypt with Hitch and Varnish (CentOS7): Step-by-step tutorial to setting up Hitch with automated and free certificates from Let's Encrypt.
Logging Hits and Misses: How to tag request type (hit, miss, pass, etc.).
Object lifetime: TTL, Grace, Keep: Tutorial to understand objects lifetime.
SELinux FAQ: Frequently asked questions about SELinux and Varnish Enterprise
Securing multi tier Varnish environments: How to make sure certain Varnish tiers are only accessible by other Varnish tiers.
VSL cheatsheet: varnishlog, varnishncsa and ready-to-use VSL queries.
Varnish Monitoring: Monitoring your varnish installation.

Manuals
Varnish Live
Varnish Cloud
Varnish Cache Plus
Varnish High Availability
Varnish Administration Console
Varnish Custom Statistics
Varnish Broadcaster
Varnish WAF
Varnish Controller

News
Varnish Controller 2.0.5
Varnish Cache Plus 6.0.8r4
Varnish Controller 2.0.4
Varnish HTTP/2 Request Smuggling
Varnish Broadcaster 1.5.2
News archive