We self-delegate _acme-challenge.unkin.net into an acme.unkin.net zone we serve,
so cert-manager can solve Let's Encrypt DNS-01 over RFC2136/TSIG. That needs a
publicly-reachable authoritative BIND, separate from the internal estate.
- Add app bind-external (base + au-syd1 overlay) and register it in the platform
ApplicationSet and AppProject destinations.
- Add BindCluster bind-external: authoritative-only, recursion off, no
forwarding, transfers denied except the keyed catalog/zone AXFR; 2 replicas;
primaryService is a dmz-pinned PureLB LoadBalancer (198.18.199.53).
- Add BindZone acme.unkin.net (primary, dynamicUpdate) and BindTSIGKey
certmanager (hmac-sha256), whose Secret reflects into the cert-manager
namespace for the rfc2136 solver.
Claude-Session: https://claude.ai/code/session_01JUoARVdmhxKQHyyyp1pxeT
Ben Vincent