Update authentication.md (structured multi-issuer AuthenticationConfiguration
+ dashboard SSO flow), multi-tenancy.md (web dashboard access), authentik-state
(new k8s-dashboard app + gheorghe groups), service-catalog (dashboard auth),
and the k8s-version-upgrade runbook (kubeadm wipes --authentication-config →
re-apply rbac post-upgrade). Design/plan addenda record the issuer-constraint
pivot from the original dual-aud approach. [ci skip]
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Design for letting namespace-owner users (e.g. gheorghe/vabbit81) open the
K8s Dashboard with their Authentik account, mapped to their per-user RBAC.
oauth2-proxy fronts kong-proxy, runs the OIDC code-flow, and injects the
user's id_token as Bearer so the apiserver applies existing namespace-owner
bindings. Additive + one ingress repoint; multi-audience scope mapping
keeps the CLI flow untouched.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
