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home-network-k3s-impl/platform/cert-manager/README.md

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platform/cert-manager

cert-manager — trusted TLS via Let's Encrypt, ACME DNS-01 (Cloudflare).

What this stub is

Flux HelmRelease + two ClusterIssuers (letsencrypt-staging, letsencrypt-prod — both mandated by ADR-0006). DNS-01 against the keithjackson.dev zone validates domain control without exposing the service (works for internal-only services, R-TLS-03) and enables the wildcard *.home.keithjackson.dev cert defined in ../gateway.

Contract (Issuer + Gateway TLS)

Part of the "Issuer + Gateway TLS" interface (roadmap/workstreams.md, WS-SEC + WS-NET): the wildcard Certificate (in gateway/) references the issuer named by ${ACME_CLUSTER_ISSUER} and its secret is consumed by the Gateway HTTPS listener.

Secrets

The Cloudflare API token is referenced by name (cloudflare-api-token) and committed SOPS-encrypted (WS-SEC, OQ-4, ADR-0007). No plaintext token in git.

TODO (later phases)

  • OQ-4 (resolved to Cloudflare): WS-SEC provisions the scoped Cloudflare token, SOPS-encrypted.
  • Set the ACME account email.
  • Phase 2 (WS-SEC): issue the wildcard cert; prove a trusted, non-self-signed cert at *.home.keithjackson.dev (R-TLS-01/03, Phase-2 exit gate).