stonks-oracle/infra/k8s/network-policies.yaml

##
## Stonks Oracle — Network Policies
##
## Default-deny ingress for the namespace, then allow only the
## traffic patterns each component actually needs.
##
## Requirements: 8.2 (trading isolation), 12.1 (observability)
##

# ── Default deny all ingress in the namespace ──────────────────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny-ingress
  namespace: stonks-oracle
spec:
  podSelector: {}
  policyTypes:
    - Ingress
---
# ── Query API: accept from Traefik ingress only ───────────────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-query-api-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: query-api
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - protocol: TCP
          port: 8000
---
# ── Symbol Registry API: accept from Traefik ingress only ─────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-symbol-registry-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: symbol-registry-api
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - protocol: TCP
          port: 8000
---
# ── Risk Engine: accept from broker-adapter only ───────────────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-risk-engine-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: risk-engine
  policyTypes:
    - Ingress
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app: broker-adapter
        - podSelector:
            matchLabels:
              app: query-api
      ports:
        - protocol: TCP
          port: 8000
---
# ── Superset: accept from Traefik ingress only ────────────────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-superset-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: superset
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - protocol: TCP
          port: 8088
---
# ── Trino: accept from Superset and query-api ─────────────────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-trino-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: trino
  policyTypes:
    - Ingress
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app: superset
        - podSelector:
            matchLabels:
              app: query-api
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - protocol: TCP
          port: 8080
---
# ── Hive Metastore: accept from Trino and lake-publisher ──────────────
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-hive-metastore-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: hive-metastore
  policyTypes:
    - Ingress
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app: trino
        - podSelector:
            matchLabels:
              app: lake-publisher
      ports:
        - protocol: TCP
          port: 9083
---
# ── Broker adapter: isolated — no inbound from other pods ──────────────
# The broker-adapter only makes outbound calls to the broker API
# and reads from Redis queues. No pod needs to call into it.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: deny-broker-adapter-ingress
  namespace: stonks-oracle
spec:
  podSelector:
    matchLabels:
      app: broker-adapter
  policyTypes:
    - Ingress
  ingress: []