mirror of
https://gitlab.kube.huskypup.net/Scooby/Homelabv4.git
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Scooby HuskyandClaude Sonnet 5
c6d4294be6
home's own authentik pods reach ha-authentik-postgres via the CoreDNS rewrite on port 61432 (not just external traffic via NodePort on 5432/ 61432) - discovered live that Istio ambient's port-level mTLS/L4 authorization enforcement is keyed on the port actually dialed (61432 here), not just the pod's real containerPort (5432) traffic eventually reaches after Service translation. The existing port-5432-only rules (from the streaming-replication fix) didn't cover this in-cluster path, surfacing as 'server closed the connection unexpectedly' from home's own authentik-worker pod. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
388 lines
9.9 KiB
YAML
388 lines
9.9 KiB
YAML
# ==========================================================================
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# Zero Trust Authorization Policies - Deny by Default, Allow Explicitly
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# ==========================================================================
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#
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# Policy hierarchy:
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# 1. Mesh-wide DENY (default - everything blocked)
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# 2. Ingress Gateway ALLOW (external traffic entry point)
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# 3. Service-to-service ALLOW (explicit inter-service communication)
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# 4. Monitoring ALLOW (Prometheus scraping, Kiali queries)
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#
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# In ambient mode, L7 policies are enforced by waypoint proxies in each
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# namespace. L4 policies (source namespace/principal) are enforced by ztunnel.
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# Each namespace with ALLOW/CUSTOM policies must have a waypoint Gateway.
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# ==========================================================================
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# --- Ingress Gateway: Allow all external traffic through the edge gateway ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-ingress-gateway
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namespace: istio-system
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spec:
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selector:
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matchLabels:
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istio: ingressgateway
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action: ALLOW
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rules:
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- {}
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---
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# --- Allow Prometheus to scrape Istio control plane + gateway metrics ---
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# Selector scopes this to istio-system workloads only.
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# Without a selector, policies in the root namespace (istio-system) apply
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# mesh-wide in ambient mode, creating implicit deny for all ambient workloads.
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-prometheus-scraping
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namespace: istio-system
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spec:
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selector:
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matchLabels:
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app.kubernetes.io/part-of: istio
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action: ALLOW
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rules:
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- from:
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- source:
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namespaces:
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- prometheus
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to:
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- operation:
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ports:
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- "15014" # istiod control plane metrics
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- "15020" # sidecar/gateway merged metrics
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- "15090" # Envoy admin metrics
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---
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# --- Allow Kiali to query istiod ---
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# Selector scopes this to istiod only (ambient root namespace caveat above).
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-kiali
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namespace: istio-system
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spec:
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selector:
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matchLabels:
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app: istiod
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action: ALLOW
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rules:
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- from:
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- source:
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principals:
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- cluster.local/ns/istio-system/sa/kiali-service-account
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---
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# --- Authentik: Allow traffic from ingress + apps doing OIDC ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-authentik-access
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namespace: authentik
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spec:
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action: ALLOW
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rules:
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# Intra-namespace (server ↔ worker ↔ postgres)
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- from:
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- source:
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namespaces:
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- authentik
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# CNPG operator managing database instances
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- from:
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- source:
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namespaces:
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- cnpg-system
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# Ingress gateway for browser flows
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- from:
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- source:
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namespaces:
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- istio-system
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# Apps doing OIDC token exchange
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- from:
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- source:
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namespaces:
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- argocd
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- gitlab
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- grafana
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- nextcloud
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- home-assistant
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- guacamole
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- netbird
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- cattle-system
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- frigate
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- teslamate
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# Prometheus scraping (L4-only; L7 path checks deferred to waypoint)
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- from:
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- source:
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namespaces:
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- prometheus
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# Multi-site active failover pilot (see
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# /home/scooby/.claude/plans/jiggly-snacking-iverson.md): CNPG
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# streaming replication from the VPS/witness, arriving via the
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# ha-authentik-postgres NodePort - no mesh identity at all (they're
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# not in this cluster), so no `source.namespaces` rule above can ever
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# match them. Scoped by destination port instead of source, matching
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# the port-scoped PERMISSIVE PeerAuthentication in
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# ha-postgres-peerauth.yaml (same root cause, same fix, one layer up -
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# mTLS being allowed through isn't enough by itself, this ALLOW policy
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# independently denies anything not matching one of the rules above).
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- to:
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- operation:
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ports:
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- "5432"
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- "61432" # floating-hostname port, see ha-postgres-peerauth.yaml
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---
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# --- Grafana: Allow ingress + Prometheus datasource queries + scraping ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-grafana-access
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namespace: grafana
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- grafana
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- from:
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- source:
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namespaces:
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- istio-system
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- from:
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- source:
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namespaces:
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- prometheus
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# NetBird VPN cluster routers (non-mesh, use ipBlocks)
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- from:
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- source:
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ipBlocks:
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- "10.244.0.0/16"
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---
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# --- Prometheus: Allow ingress + self-scraping + Grafana ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-prometheus-access
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namespace: prometheus
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spec:
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action: ALLOW
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rules:
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# Intra-namespace (Prometheus ↔ alertmanager ↔ node-exporter)
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- from:
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- source:
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namespaces:
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- prometheus
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- from:
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- source:
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namespaces:
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- istio-system
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- grafana
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# NetBird VPN cluster routers (non-mesh, use ipBlocks)
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- from:
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- source:
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ipBlocks:
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- "10.244.0.0/16"
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---
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# --- MQTT: Allow Home Assistant + Frigate + ESPHome + Prometheus ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-mqtt-access
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namespace: mqtt
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- mqtt
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- from:
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- source:
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namespaces:
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- istio-system
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- home-assistant
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- frigate
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- teslamate
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# Prometheus scraping (L4-only; L7 path checks deferred to waypoint)
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- from:
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- source:
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namespaces:
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- prometheus
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---
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# --- External DNS: Allow internal access + Prometheus ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-external-dns
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namespace: external-dns
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- external-dns
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- from:
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- source:
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namespaces:
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- istio-system
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# Prometheus scraping (L4-only; L7 path checks deferred to waypoint)
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- from:
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- source:
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namespaces:
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- prometheus
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---
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# --- Unpoller: Allow Prometheus scraping ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-unpoller-access
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namespace: unpoller
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- unpoller
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# Prometheus scraping (L4-only; L7 path checks deferred to waypoint)
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- from:
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- source:
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namespaces:
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- prometheus
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---
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# --- Netbird: Allow ingress + Prometheus ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-netbird-access
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namespace: netbird
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- netbird
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# CNPG operator managing database instances
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- from:
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- source:
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namespaces:
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- cnpg-system
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- from:
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- source:
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namespaces:
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- istio-system
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# Netbird operator querying management API
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- from:
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- source:
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namespaces:
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- netbird
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- from:
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- source:
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namespaces:
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- prometheus
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# kube-apiserver webhook calls to netbird-operator webhook service (node IPs)
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- from:
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- source:
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ipBlocks:
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- "172.28.101.0/24"
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---
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# --- Netbird Operator: Allow intra-namespace + Prometheus ---
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# Operator runs in the "netbird" namespace, not "netbird-operator" (which
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# doesn't exist) - fixed 2026-08-17, was blocking istio-mesh-config from
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# ever going Synced (kubectl apply failed: "namespaces netbird-operator
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# not found").
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-netbird-operator-access
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namespace: netbird
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- netbird
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# Prometheus scraping (L4-only)
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- from:
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- source:
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namespaces:
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- prometheus
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---
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# --- CrowdSec: Allow intra-namespace + CNPG + Prometheus ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-crowdsec-access
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namespace: crowdsec
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spec:
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action: ALLOW
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rules:
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# Intra-namespace (LAPI <-> agent)
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- from:
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- source:
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namespaces:
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- crowdsec
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# CNPG operator managing database instances
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- from:
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- source:
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namespaces:
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- cnpg-system
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# Prometheus scraping (L4-only; L7 path checks deferred to waypoint)
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- from:
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- source:
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namespaces:
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- prometheus
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# Firewall bouncer (hostNetwork DaemonSet) connects from node IPs
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- from:
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- source:
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ipBlocks:
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- "172.28.101.0/24"
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---
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# --- Scylla Manager: Allow ingress + Prometheus + intra-namespace ---
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apiVersion: security.istio.io/v1
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kind: AuthorizationPolicy
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metadata:
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name: allow-scylla-manager-access
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namespace: scylla-manager
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spec:
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action: ALLOW
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rules:
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# Intra-namespace
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- from:
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- source:
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namespaces:
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- scylla-manager
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- from:
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- source:
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namespaces:
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- istio-system
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- from:
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- source:
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namespaces:
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- prometheus
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# Scylla operator managing clusters
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- from:
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- source:
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namespaces:
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- scylla-operator
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