Tailscale GitHub Action v4: faster, more reliable, and new features

Tailscale has released version 4 of its GitHub Action, transitioning from Bash to TypeScript to enhance functionality, reliability, and performance. This update addresses limitations of previous versions, such as slow propagation of firewall rules and lingering disconnected devices, which affected CI/CD workflows. By leveraging the GitHub Actions Toolkit, the new version introduces features like automatic device cleanup and improved speed through efficient caching, ultimately optimizing the user experience and potential cost savings. The upgrade simplifies connecting GitHub managed runners to infrastructure using zero trust principles, enabling seamless automation for tasks like integration tests and database migrations. The Tailscale GitHub Action v4 is designed to be easy to adopt by updating workflow references, and user feedback is encouraged to further refine Tailscale’s CI/CD tools.