Files
home-network-k3s-impl/apps/wave-1/radarr.yaml
T
jakman85andClaude Opus 5 c8c1d2935d
gate / gate (push) Has been cancelled
gate / conformance (push) Has been cancelled
feat(dns): per-environment BASE_DOMAIN — prod moves to its own subdomain
INCIDENT FIX. Prod's external-dns DELETED EVERY ONE OF DEV'S PUBLIC DNS RECORDS. Both
clusters ran policy: sync against the SAME Cloudflare zone with the SAME implicit
txtOwnerId (`default`), so prod believed it owned dev's records, found no matching sources,
and removed them plus their TXT registry entries. Dev recovered ~30s after prod was scaled
to 0; verified restored against Cloudflare directly (my first check went through a pfSense
override and falsely showed healthy — local resolvers are not evidence about public DNS).

THE MISS WAS MINE, and it was a failure of imagination in how I briefed every agent. I put
"never touch dev" in brief after brief and enforced it — separate kubeconfigs, verified
--limit, sha-checked dev's kubeconfig before and after. Every one of those guards held. NONE
of them covered SHARED EXTERNAL RESOURCES. Prod reconciling its OWN correctly-authored
manifests reached across a third party and destroyed dev's state. Cluster-to-cluster
isolation was verified; the dependency that mattered was cluster-to-Cloudflare.

Operator's architecture: dev -> *.dev.home.keithjackson.dev, prod ->
*.prod.home.keithjackson.dev, apex CNAME <svc>.home -> <svc>.prod.home.

PHASE 1 ONLY (this commit): prod moves to its own subdomain. DEV IS NOT MIGRATED and its
effective hostname stays home.keithjackson.dev, so dev renders byte-identically and nothing
live moves. That alone ends the collision and unblocks prod. Phase 2 (dev -> dev.home. +
apex CNAMEs) is deferred to when the operator is present: it relocates Keycloak's issuer and
12 clients' redirect URIs, forces a rolling k3s restart and kubectl SSO re-issue for every
user, and moves gitea.home. — which is BOTH the GitOps source and the current push target.

BASE_DOMAIN WAS A DEAD KNOB — it existed in cluster-vars but the status report flagged it as
referenced by nothing, because hostnames were hardcoded throughout. Now real: 141 refs.
Searched the AUTHORITATIVE reconciled set by resolving each Flux spec.path transitively via
conformance/lib/status.py — the same resolver the L0 gate uses, so "what Flux reconciles"
has one definition. 185 occurrences across 47 files in 154 reconciled files. Tokenized:
Gateway listeners, the wildcard Certificate, coredns-custom, external-dns, Keycloak
instance/realm (26 redirect URIs), oauth2-proxy, Grafana OIDC, all HTTPRoutes, Homepage's 15
links, 30 runbook_urls, unifi cloud-init, render.py's ZONE constant (which drove
--oidc-issuer-url/--cookie-domain/--whitelist-domain on every forward-auth sidecar) and 11
catalog/ ServiceDefinitions re-rendered canonically. Left alone: 43 comment/prose
occurrences and non-reconciled paths.

TWO THAT CANNOT BE TOKENIZED, flagged not forced:
  - headlamp's OIDC URLs live inside a SOPS-encrypted Secret; re-encrypting rewrites the MAC
    over every value and the OFFLINE harness cannot verify it (kustomize does not decrypt),
    so an error would break live-dev SSO with no pre-flight proof. Prod needs its own copy
    anyway — client secrets are realm-scoped.
  - kube-apiserver --oidc-issuer-url is a k3s SERVER FLAG, not a manifest, so Flux can never
    reach it. Done on the inventory seam instead (k3s_base_domain -> k3s_oidc_issuer_url,
    overridden in group_vars/k3s_prod). Verified per host: dev keeps the default, prod gets
    prod.home.

EXTERNAL-DNS OWNER, the actual incident cause: txtOwnerId is now explicit per environment —
dev renders exactly `default` (the chart default it was already using, so its existing
records stay recognised) and prod gets `prod`. The BASE default is a NON-COLLIDING SENTINEL,
deliberately not `default`, so a future environment that forgets the knob owns nothing and
can delete nothing rather than silently inheriting dev's identity.

I OVERRODE ONE AGENT DECISION against our own prior finding: it narrowed prod's
domainFilters to prod.home.keithjackson.dev as defence in depth. FINDING F-DNS1
(DECISIONS-LOG 2026-08-17) already proved a subdomain filter DROPS THE PARENT ZONE —
ExternalDNS generates the record then skips it with "no hosted zone matching record DNS
Name". Prod would have published NOTHING. Set to the ZONE (keithjackson.dev) like dev.
Isolation comes from the subdomain split plus txtOwnerId, which is what the incident
actually needed and what a domain filter cannot provide.

DEV PROVEN UNCHANGED: 11 of 12 substituting paths byte-identical; the 12th differs by
exactly one line, `+ txtOwnerId: default` — the value dev was already using implicitly.
POSITIVE CONTROLS confirm the harness is not blind: perturbing BASE_DOMAIN moves 10 of 12
hashes (the 2 that don't provably contain no hostname), perturbing the owner id moves
exactly 1. Prod's rendered output has ZERO home.keithjackson.dev references outside prod.,
and its cert renders *.prod.home.keithjackson.dev — no overlap with dev's.

L0 substitution assertions 106 -> 254; BASE_DOMAIN is no longer flagged dead. Gate PASS.

PROD REMAINS SUSPENDED (platform + 10 downstream tiers) pending review; nothing applied.

Serves: R-ENV-02, R-DNS-01, R-DNS-02, R-DNS-03, R-TLS-01.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
2026-09-04 22:43:54 -05:00

350 lines
8.1 KiB
YAML

---
# Namespace (trust zone; default-deny + policies apply)
apiVersion: v1
kind: Namespace
metadata:
name: radarr
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: radarr
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 radarr-config (R-STATE)
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: radarr-config
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
accessModes:
- ReadWriteOnce
storageClassName: longhorn
resources:
requests:
storage: 5Gi
---
# Deployment (R-PLAT-02)
apiVersion: apps/v1
kind: Deployment
metadata:
name: radarr
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
replicas: 1
strategy:
type: Recreate
selector:
matchLabels:
app.kubernetes.io/name: radarr
template:
metadata:
labels:
app.kubernetes.io/name: radarr
homelab.keithjackson.dev/egress-class: vpn
homelab.keithjackson.dev/auth-mode: forward-auth
annotations:
homelab.keithjackson.dev/auth-mode: forward-auth
homelab.keithjackson.dev/auth-groups: media-users
spec:
containers:
- name: radarr
image: lscr.io/linuxserver/radarr:5.21.1
ports:
- containerPort: 7878
volumeMounts:
- name: config
mountPath: /data/config
- name: oauth2-proxy
image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
imagePullPolicy: IfNotPresent
args:
- --http-address=0.0.0.0:4180
- --reverse-proxy=true
- --provider=oidc
- --oidc-issuer-url=https://keycloak.${BASE_DOMAIN}/realms/homelab
- --upstream=http://127.0.0.1:7878
- --email-domain=*
- --scope=openid email profile
- --oidc-groups-claim=groups
- --allowed-group=media-users
- --skip-provider-button=true
- --redirect-url=https://radarr.${BASE_DOMAIN}/oauth2/callback
- --cookie-domain=.${BASE_DOMAIN}
- --whitelist-domain=.${BASE_DOMAIN}
- --cookie-secure=true
- --pass-access-token=true
- --set-xauthrequest=true
env:
- name: OAUTH2_PROXY_CLIENT_ID
valueFrom:
secretKeyRef:
name: radarr-oauth2-proxy
key: client-id
- name: OAUTH2_PROXY_CLIENT_SECRET
valueFrom:
secretKeyRef:
name: radarr-oauth2-proxy
key: client-secret
- name: OAUTH2_PROXY_COOKIE_SECRET
valueFrom:
secretKeyRef:
name: radarr-oauth2-proxy
key: cookie-secret
ports:
- name: http
containerPort: 4180
protocol: TCP
resources:
requests:
cpu: 25m
memory: 64Mi
limits:
memory: 128Mi
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
capabilities:
drop:
- ALL
livenessProbe:
httpGet:
path: /ping
port: http
initialDelaySeconds: 5
periodSeconds: 15
readinessProbe:
httpGet:
path: /ping
port: http
initialDelaySeconds: 5
periodSeconds: 15
volumes:
- name: config
persistentVolumeClaim:
claimName: radarr-config
---
# Service
apiVersion: v1
kind: Service
metadata:
name: radarr
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
selector:
app.kubernetes.io/name: radarr
ports:
- name: port-7878
port: 7878
targetPort: 7878
- name: authproxy
port: 4180
targetPort: 4180
---
# CiliumNetworkPolicy egress allow (R-NET-02): radarr-allow-qbittorrent-8080
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: radarr-allow-qbittorrent-8080
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: radarr
egress:
- toEndpoints:
- matchLabels:
app.kubernetes.io/name: qbittorrent
k8s:io.kubernetes.pod.namespace: qbittorrent
toPorts:
- ports:
- port: '8080'
protocol: TCP
---
# CiliumNetworkPolicy egress allow (R-NET-02): radarr-allow-jackett-9117
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: radarr-allow-jackett-9117
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: radarr
egress:
- toEndpoints:
- matchLabels:
app.kubernetes.io/name: jackett
k8s:io.kubernetes.pod.namespace: jackett
toPorts:
- ports:
- port: '9117'
protocol: TCP
---
# CiliumNetworkPolicy reciprocal ingress allow (R-NET-02): radarr-allow-seerr-7878
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: radarr-allow-seerr-7878
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: radarr
ingress:
- fromEndpoints:
- matchLabels:
app.kubernetes.io/name: seerr
k8s:io.kubernetes.pod.namespace: seerr
toPorts:
- ports:
- port: '7878'
protocol: TCP
---
# CiliumNetworkPolicy gateway-ingress allow (R-NET-01/02): radarr-allow-gateway-ingress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: radarr-allow-gateway-ingress
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: radarr
ingress:
- fromEntities:
- ingress
toPorts:
- ports:
- port: '4180'
protocol: TCP
---
# CiliumNetworkPolicy world egress allow (egress class governs the path; R-NET-05): radarr-allow-internet-egress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: radarr-allow-internet-egress
namespace: radarr
labels:
app.kubernetes.io/name: radarr
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: radarr
egress:
- toEntities:
- world
- toEndpoints:
- matchLabels:
io.kubernetes.pod.namespace: keycloak
app: keycloak
---
# HTTPRoute radarr-7878 (R-TLS/R-DNS)
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
name: radarr-7878
namespace: radarr
labels:
app.kubernetes.io/name: radarr
annotations:
homelab.keithjackson.dev/auth-mode: forward-auth
homelab.keithjackson.dev/auth-groups: media-users
spec:
parentRefs:
- name: shared
namespace: gateway
sectionName: https
hostnames:
- radarr.${BASE_DOMAIN}
rules:
- matches:
- path:
type: PathPrefix
value: /
backendRefs:
- name: radarr
port: 4180
---
# ServiceMonitor (R-OBS-01)
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
name: radarr
namespace: radarr
labels:
release: kube-prometheus-stack
app.kubernetes.io/name: radarr
spec:
selector:
matchLabels:
app.kubernetes.io/name: radarr
namespaceSelector:
matchNames:
- radarr
endpoints:
- port: metrics
interval: 30s
---
# PrometheusRule SLI alerts (R-OBS-01)
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
name: radarr-slis
namespace: radarr
labels:
release: kube-prometheus-stack
app.kubernetes.io/name: radarr
spec:
groups:
- name: radarr.slis
rules:
- alert: radarr-down
expr: up{job="radarr"} == 0
for: 5m
labels:
severity: critical
service: radarr
annotations:
summary: radarr is down
description: 'radarr has been unreachable for 5m (SLI: up).'