k3s-cluster/nas/ingress.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: nas-proxy
---
# Standalone cert-manager Certificate for nas.rogi.casa (not owned by an Ingress,
# since cert-manager's ingress-shim would otherwise create one owned by the
# Ingress below and tie its lifecycle to it; keeping it standalone is cleaner).
apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
  name: nas-tls
  namespace: nas-proxy
spec:
  secretName: nas-tls
  dnsNames:
    - nas.rogi.casa
  issuerRef:
    group: cert-manager.io
    kind: ClusterIssuer
    name: letsencrypt-prod
  usages:
    - digital signature
    - key encipherment
---
# Selector-less Service + manual Endpoints pointing at the NAS.
# Requires the argocd-cm `resource.exclusions` to NOT exclude Endpoints
# (the default K3s/ArgoCD exclusion strips all Endpoints objects).
apiVersion: v1
kind: Service
metadata:
  name: synology-nas
  namespace: nas-proxy
spec:
  type: ClusterIP
  clusterIP: None
  ports:
    - port: 5001
      targetPort: 5001
      protocol: TCP
---
apiVersion: v1
kind: Endpoints
metadata:
  name: synology-nas
  namespace: nas-proxy
subsets:
  - addresses:
      - ip: 10.88.30.10
    ports:
      - port: 5001
        protocol: TCP
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nas
  namespace: nas-proxy
  annotations:
    cert-manager.io/cluster-issuer: letsencrypt-prod
    # Tell Traefik the backend is HTTPS (DSM uses HTTPS on 5001)
    traefik.ingress.kubernetes.io/router.tls: "true"
    # Skip backend TLS verification since DSM uses a self-signed cert
    traefik.ingress.kubernetes.io/service.serversscheme: https
    traefik.ingress.kubernetes.io/service.serverstransport: skip-verify@file
    traefik.ingress.kubernetes.io/max-request-body-bytes: "5368709120"
spec:
  ingressClassName: traefik
  tls:
    - hosts:
        - nas.rogi.casa
      secretName: nas-tls
  rules:
    - host: nas.rogi.casa
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: synology-nas
                port:
                  number: 5001