What’s new in Varnish?

This section describes the changes and improvements between different versions of Varnish, and what upgrading between the different versions entail.

Varnish 9.0

• Changes in Varnish Cache 9.0
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishstat
  • Changes for developers and VMOD authors
• Upgrading to Varnish Cache 9.0
  • varnishd
  • Upgrade notes for VMOD developers

Varnish 8.0

• Changes in Varnish-Cache 8.0
  • varnishd
  • Changes to VCL
  • VMODs
  • VUTs
  • varnishlog
  • varnishadm
  • varnishstat
  • varnishtest
  • varnishncsa
  • Changes for developers and VMOD authors
• Upgrading to Varnish-Cache 8.0
  • varnishd
  • Bans
  • vmod_std changes
  • vmod_cookie changes
  • Upgrade notes for VMOD developers

Varnish 7.7

• Changes in Varnish-Cache 7.7
  • Security
  • varnishd
  • Changes to VCL
  • varnishadm
  • Generic Logging (VSL)
  • Interactive mode in varnishstat, varnishtop and varnishhist
  • varnishncsa
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish-Cache 7.7
  • Upgrade notes for VMOD developers

Varnish 7.6

• Changes in Varnish 7.6
  • Changes applying to most varnish-cache programs
  • varnishd
  • Changes to VCL
  • varnishlog
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.6
  • Noteworthy changes for container workloads
  • Noteworthy changes when upgrading varnishd
  • Upgrading VCL
  • Changes for developers and VMOD authors

Varnish 7.5

• Changes in Varnish 7.5
  • Security
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishncsa
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.5
  • Logs
  • Timeouts

Varnish 7.4

• Changes in Varnish 7.4
  • varnishd
  • Changes to VCL
  • varnishlog
  • varnishadm
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.4
  • Important VCL Changes
  • Parameter Changes

Varnish 7.3

• Changes in Varnish 7.3
  • varnishd
  • Changes to VCL
  • varnishlog
  • varnishadm
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.3
  • New VSL format
  • For developers and VMOD authors: C interface changes requiring adjustments

Varnish 7.2

• Changes in Varnish 7.2
  • varnishd
  • Changes to VCL
  • Bundled VMODs
  • varnishlog
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.2
  • varnishd
  • VCL
  • VMODs
  • varnishlog
  • varnishstat
  • Changes for developers and VMOD authors

Varnish 7.1

• Changes in Varnish 7.1
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishncsa
  • varnishadm
  • varnishtest
  • Changes for developers and VMOD authors
  • Platform Support
• Upgrading to Varnish 7.1
  • varnishd
  • varnishtest
  • Changes for developers and VMOD authors
  • Platform Support

Varnish 7.0

• Changes in Varnish 7.0
  • PCRE2
  • RFC8941 - Structured Fields
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishncsa
  • varnishadm
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 7.0
  • PCRE2
  • Structured Fields numbers
  • Memory footprint
  • Range requests
  • ACL
  • Changes for developers

Varnish 6.6

• Changes in Varnish 6.6
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishncsa
  • varnishadm
  • varnishstat
  • varnishtest
  • Other Changes to Varnish Utilities
  • Developer: Changes for VMOD authors
  • Developer: Changes for Authors of Varnish Utilities
• Upgrading to Varnish 6.6
  • Header Validation
  • BAN changes
  • Accounting Changes
  • VSL changes
  • VMOD cookie functions
  • Other VCL Changes
  • Changes to VMODs

Varnish 6.5

• Changes in Varnish 6.5.0
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishadm
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 6.5.0
  • varnishstat
  • VSL
  • Changes for developers and VMOD authors
  • Official Packages related changes

Varnish 6.4

• Changes in Varnish 6.4.0
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog
  • varnishadm
  • varnishstat
  • Changes for developers and VMOD authors
• Upgrading to Varnish 6.4.0
  • varnishd
  • Statistics
  • vsl/logs

Varnish 6.3

• Changes in Varnish 6.3
  • varnishd
  • Changes to VCL
  • VMODs
  • vsl-query(7)
  • varnishlog(1), varnishncsa(1) and others
  • varnishstat
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 6.3
  • For users of many and/or labeled VCLs
  • For developers and authors of VMODs and API clients

Varnish 6.2

• Changes in Varnish 6.2
  • varnishd
  • Changes to VCL
  • VMODs
  • varnishlog(1), varnishncsa(1) and vsl(7)
  • varnishadm(1) and varnish-cli(7)
  • varnishstat(1) and varnish-counters(7)
  • varnishtest
  • Changes for developers and VMOD authors
• Upgrading to Varnish 6.2
  • VCL
  • Runtime parameters
  • Type conversion functions in VMOD std
  • varnishadm and the CLI
  • For developers and authors of VMODs and API clients

Varnish 6.1

• Changes in Varnish 6.1
  • Nothing to see here, really
• Upgrading to Varnish 6.1
  • varnishd parameters
  • Changes to VCL
  • VMODs
  • Other changes

Varnish 6.0

• Changes in Varnish 6.0
  • Under the hood (mostly for developers)
  • The stuff only we care about
• Upgrading to Varnish 6.0
  • Unix domain sockets as listen addresses
  • Unix domain sockets as backend addresses
  • varnishd parameters
  • Changes to VCL
  • Packaging changes
  • Other changes

Varnish 5.2

• Changes in Varnish 5.2
  • New VMODs in the standard distribution
  • News for authors of VMODs and Varnish API client applications
• Upgrading to Varnish 5.2
  • Varnish statistics and logging
  • varnishd parameters
  • Changes to VCL
  • Other changes

Varnish 5.1

• Changes in Varnish 5.1
  • Startup CLI command file
  • Universal VCL return(fail)
  • Progress on HTTP/2 support
  • Hit-For-Pass has returned
  • 304 Not Modified responses after a pass
  • VXID in VSL queries
  • Project tool improvements
  • News for authors of VMODs and Varnish API client applications
• Upgrading to Varnish 5.1
  • varnishd command-line options
  • varnishd parameters
  • Changes to VCL
  • Other changes

Varnish 5.0

• Varnish 5.0 Release Note
  • How to get Varnish 5.0
  • Reasons to upgrade to Varnish 5.0
  • Reasons not to upgrade to Varnish 5.0
  • Next release
  • The obligatory thank-you speech
  • We need more money
  • We also need more manpower
• Changes in Varnish 5.0
  • Separate VCL files and VCL labels
  • Very Experimental HTTP/2 support
  • The Shard Director
  • Hit-For-Pass is now actually Hit-For-Miss
  • Ban Lurker Improvements
  • Request Body sent always / “cacheable POST”
  • ESI and Backend Request Coalescing (“waitinglist”) Improvement
  • Backend PROXY protocol requests
  • Default VCL search path
  • devicedetect.vcl
  • varnishtest
  • misc
  • News for VMOD authors
• Upgrading to Varnish 5.0
  • Changes to VCL
  • Management interface
  • Changes to parameters
  • Other changes

Varnish 4.1

• Changes in Varnish 4.1
  • Proactive security features
  • Warm and cold VCL configurations
  • PROXY protocol support
  • VMOD backends
  • Backend connection timeout
  • Protocol support
  • More modules available
  • Passing data between ESI requests
  • Other noteworthy small changes
• Upgrading to Varnish 4.1
  • Changes to VCL
  • Management interface
  • Runtime users and groups
  • Changes to parameters

Varnish 4.0

• Upgrading to Varnish 4.0
  • Changes to VCL
  • Changes to existing parameters
  • New parameters since 3.0
  • Other changes