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).'

catalog/seerr.yaml

@@ -0,0 +1,61 @@
+# ServiceDefinition: seerr
+# Source of truth: spec docs/13-service-catalog.md row 5; docs/15-identity-and-access.md;
+# docs/03-networking-isolation-and-egress.md (explicit allow rules).
+# public | egress internet | config on Longhorn | auth: native (Plex accounts) |
+# seerr -> sonarr:8989, seerr -> radarr:7878, seerr -> plex:32400.
+#
+# Seerr is the media request UI (Overseerr): users request titles, it hands them to the arr
+# stack and reflects library state from Plex. It is publicly exposed (edge port-forward + public
+# DNS, docs/09) and authenticates with Plex's own account system — a DOCUMENTED SSO exception
+# (docs/13/15; R-IDP-02): NOT Keycloak, so no oidc/forward-auth and no auth.groups. The three
+# east-west hops below are EXPLICIT allows on top of default-deny (docs/03; R-NET-01/02);
+# everything else (except DNS) is denied. Validates against schemas/servicedefinition.schema.json.
+#
+# Image: Overseerr (sctx/overseerr) — the Plex-native request UI on port 5055 (docs/13 row 5
+# names "seerr" generically; Overseerr is the Plex-account variant). `:latest` mirrors the
+# onboarding posture used for plex (image-automation off during onboarding; update.range is the
+# advisory bound the ImagePolicy will enforce once the Flux image controllers are installed).
+#
+# No `bulk` volume: seerr keeps only its own config PVC (settings + request/cache DB) on the
+# longhorn tier. It stores no media and needs no bulk mount, so OQ-2 (unresolved bulk backing)
+# does not apply here.
+name: seerr
+kind: container
+source:
+  image: sctx/overseerr:latest   # Overseerr: Plex-native request UI (docs/13 row 5); served on 5055
+exposure: public                 # edge port-forward + public DNS (docs/09; R-DNS/R-NET)
+egress: internet                 # normal WAN egress (docs/03; R-NET-05) — TMDB/Plex.tv metadata over the internet
+storage:
+  - name: config
+    size: 5Gi
+    class: longhorn              # settings + request/cache DB: replicated app state on the 3-replica tier (docs/04; R-STATE-01/02)
+dependencies:
+  - to: sonarr                   # seerr -> sonarr: submit TV requests (docs/03 allow rules; docs/13 graph; R-NET-02)
+    port: 8989
+    protocol: tcp
+  - to: radarr                   # seerr -> radarr: submit movie requests (docs/03 allow rules; docs/13 graph; R-NET-02)
+    port: 7878
+    protocol: tcp
+  - to: plex                     # seerr -> plex: read library / watch state (docs/03 allow rules; docs/13 graph; R-NET-02)
+    port: 32400
+    protocol: tcp
+ingressRoutes:
+  - host: seerr.home.keithjackson.dev
+    port: 5055                   # Overseerr web UI + API; wildcard TLS terminates at the shared Gateway (docs/08/09)
+auth:
+  mode: native                   # Plex account auth — documented exception, NOT Keycloak (docs/13/15; R-IDP-02)
+update:
+  channel: stable                # R-UPD-01 (never pre-release)
+  range: ">=1.33.0"              # acceptable versions (advisory; image-automation off during onboarding)
+  cadence: "0 4 * * 0"           # weekly stable check/apply
+  autoRollbackOnFailedHealth: true   # R-UPD-03
+observability:
+  metrics: true
+  slis:
+    - up                         # R-OBS-01: service-down alert
+backup:
+  # seerr's config is on the longhorn (replicated) tier, so the L0 Kyverno backup policy
+  # (servicedefinition-backup; R-STATE-03) forbids `reacquirable` here — it must reference an
+  # off-cluster schedule. The request/settings DB is cheap to rebuild but still lives on the
+  # irreplaceable tier, so it is backed up off-cluster like the other arr-stack config volumes.
+  policy: daily-offcluster       # off-cluster backup of the longhorn config volume (docs/04; R-STATE-03)