feat(apps): onboard seerr (Overseerr request UI) — completes arr↔seerr↔plex graph

Phase 6: add the seerr ServiceDefinition and its rendered manifests. seerr is the
final missing node in the media dependency graph (docs/13 row 5; docs/03 allow rules).

- catalog/seerr.yaml: public | egress internet | config on longhorn (5Gi) |
  auth native (Plex accounts, documented SSO exception, docs/15) | 3 explicit egress
  deps: sonarr:8989, radarr:7878, plex:32400. No bulk volume (OQ-2 unresolved).
- apps/seerr.yaml: rendered via catalog/render.py --no-image-automation (default-deny
  DNS-only baseline + 3 dep CiliumNetworkPolicies + gateway-ingress + internet world
  egress + HTTPRoute seerr.home.keithjackson.dev:5055 + ServiceMonitor + alerts).
- apps/kustomization.yaml: add seerr.yaml (with the arr/media stack).

Gates: render --selftest PASS; ci lint PASS; L0 kyverno 17/17 (schema + default-deny +
egress-class + auth-mode + host-ns); L1 render 3/3. Other apps byte-identical.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

apps/kustomization.yaml

@@ -16,6 +16,7 @@ resources:
   - plex.yaml
   - qbittorrent.yaml
   - jackett.yaml
+  - seerr.yaml
 # Gitea-only supplementary patch: headless-install env + break-glass admin postStart hook.
 # The renderer does not yet emit env/lifecycle (renderer follow-up); see gitea-bootstrap-patch.yaml.
 patches:

apps/seerr.yaml

@@ -0,0 +1,269 @@
+---
+# Namespace (trust zone; default-deny + policies apply)
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: seerr
+  labels:
+    homelab.keithjackson.dev/app-namespace: 'true'
+    gateway-access: shared
+  annotations:
+    homelab.keithjackson.dev/backup-policy: daily-offcluster
+---
+# Default-deny baseline (R-NET-01): deny all, allow only DNS
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny
+  namespace: seerr
+  labels:
+    homelab.keithjackson.dev/baseline: default-deny
+spec:
+  podSelector: {}
+  policyTypes:
+  - Ingress
+  - Egress
+  ingress: []
+  egress:
+  - to:
+    - namespaceSelector:
+        matchLabels:
+          kubernetes.io/metadata.name: kube-system
+    ports:
+    - protocol: UDP
+      port: 53
+    - protocol: TCP
+      port: 53
+---
+# PVC seerr-config (R-STATE)
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: seerr-config
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  accessModes:
+  - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: 5Gi
+---
+# Deployment (R-PLAT-02)
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: seerr
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: seerr
+        homelab.keithjackson.dev/egress-class: internet
+        homelab.keithjackson.dev/auth-mode: native
+    spec:
+      containers:
+      - name: seerr
+        image: sctx/overseerr:latest
+        ports:
+        - containerPort: 5055
+        volumeMounts:
+        - name: config
+          mountPath: /data/config
+      volumes:
+      - name: config
+        persistentVolumeClaim:
+          claimName: seerr-config
+---
+# Service
+apiVersion: v1
+kind: Service
+metadata:
+  name: seerr
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  selector:
+    app.kubernetes.io/name: seerr
+  ports:
+  - name: port-5055
+    port: 5055
+    targetPort: 5055
+---
+# CiliumNetworkPolicy egress allow (R-NET-02): seerr-allow-sonarr-8989
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: seerr-allow-sonarr-8989
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  egress:
+  - toEndpoints:
+    - matchLabels:
+        app.kubernetes.io/name: sonarr
+    toPorts:
+    - ports:
+      - port: '8989'
+        protocol: TCP
+---
+# CiliumNetworkPolicy egress allow (R-NET-02): seerr-allow-radarr-7878
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: seerr-allow-radarr-7878
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  egress:
+  - toEndpoints:
+    - matchLabels:
+        app.kubernetes.io/name: radarr
+    toPorts:
+    - ports:
+      - port: '7878'
+        protocol: TCP
+---
+# CiliumNetworkPolicy egress allow (R-NET-02): seerr-allow-plex-32400
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: seerr-allow-plex-32400
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  egress:
+  - toEndpoints:
+    - matchLabels:
+        app.kubernetes.io/name: plex
+    toPorts:
+    - ports:
+      - port: '32400'
+        protocol: TCP
+---
+# CiliumNetworkPolicy gateway-ingress allow (R-NET-01/02): seerr-allow-gateway-ingress
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: seerr-allow-gateway-ingress
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  ingress:
+  - fromEntities:
+    - ingress
+    toPorts:
+    - ports:
+      - port: '5055'
+        protocol: TCP
+---
+# CiliumNetworkPolicy world egress allow (egress class governs the path; R-NET-05): seerr-allow-internet-egress
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: seerr-allow-internet-egress
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  egress:
+  - toEntities:
+    - world
+---
+# HTTPRoute seerr-5055 (R-TLS/R-DNS)
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: seerr-5055
+  namespace: seerr
+  labels:
+    app.kubernetes.io/name: seerr
+spec:
+  parentRefs:
+  - name: shared
+    namespace: gateway
+    sectionName: https
+  hostnames:
+  - seerr.home.keithjackson.dev
+  rules:
+  - matches:
+    - path:
+        type: PathPrefix
+        value: /
+    backendRefs:
+    - name: seerr
+      port: 5055
+---
+# ServiceMonitor (R-OBS-01)
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: seerr
+  namespace: seerr
+  labels:
+    release: kube-prometheus-stack
+    app.kubernetes.io/name: seerr
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: seerr
+  namespaceSelector:
+    matchNames:
+    - seerr
+  endpoints:
+  - port: metrics
+    interval: 30s
+---
+# PrometheusRule SLI alerts (R-OBS-01)
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: seerr-slis
+  namespace: seerr
+  labels:
+    release: kube-prometheus-stack
+    app.kubernetes.io/name: seerr
+spec:
+  groups:
+  - name: seerr.slis
+    rules:
+    - alert: seerr-down
+      expr: up{job="seerr"} == 0
+      for: 5m
+      labels:
+        severity: critical
+        service: seerr
+      annotations:
+        summary: seerr is down
+        description: 'seerr has been unreachable for 5m (SLI: up).'