Varnish Controller 7.5.0 Release

• Support for rolling upgrades of VCLGroups.
• Router health probes now support a JSON response format, reducing the number of health checks needed.
• Added a new Score routing rule and sub-decisions.
• Support for agent maintenance file to mark agents as stop-routing or resume-routing.
• Administrators can now impersonate organizations.
• Support for tag-based compile, deploy and validate commands in vcli.
• ACME DNS validation now retries until the DNS check passes.
• Gzip compression for API and debug endpoints.
• Added support for MFA.
• Fixed CIDR IPv6 lookup issue.
• Security fixes for non-numeric key IDs and timing enumeration.
• VCL source removed from full controller gather to reduce output size.
• Significant performance improvements for deployments, routing configuration and statistics.
• Signficant reduction of database queries.
• Updated internal NATS serialization layer and agent/router subject format.
• Built with Go 1.26 and updated dependencies.

See Varnish Controller Changelog for more details on the changes and the upgrade notes for more details on how to upgrade.