feat(tailscale): manage tailnet policy with gitops - #6
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Track the tailnet policy file in git and sync it with a GitHub Action: validate on pull requests, apply on merge to master. Authenticates with a Tailscale workload identity federation credential, so no long-lived secret is stored in the repository. Drops tag:dntls, which is no longer used.
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Summary
Makes git the source of truth for the tailnet policy file.
tailscale/policy.hujson— the current tailnet policy, with everytag:dntlselement removed (tag owner, both ACL rules, and the admin SSH rule). Comments
record the intent of each section.
.github/workflows/tailscale-acl.yml— validates the policy on pull requestsand applies it on merge to
masteror manual dispatch, usingtailscale/gitops-acl-actionpinned by commit. Authenticates with a Tailscaleworkload identity federation credential, so no long-lived secret is stored.
.gitignore— ignoresversion-cache.json, the etag cachegitops-pusherwrites at runtime.
Validation
github.com/tailscale/hujson;Standardizeproducesexactly the intended JSON.
actionlintreports no issues for the workflow.Tailscale ACLcheck on this pull request validates the policy against thetailnet.
Notes
Documentation is the companion pull request GilmanLab/root#9: ADR-0002, the
Tailscale policy reference, and the policy change runbook. Console editing gets
locked after the first successful apply.