apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-grafana-to-prometheus
  namespace: monitoring
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: grafana
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              name: monitoring
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: prometheus-server
      ports:
        - protocol: TCP
          port: 9090

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-grafana-to-elasticsearch
  namespace: monitoring
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: grafana
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              name: monitoring
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: elasticsearch-master
      ports:
        - protocol: TCP
          port: 9200

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-grafana-to-logstash
  namespace: monitoring
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: grafana
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              name: monitoring
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: logstash
      ports:
        - protocol: TCP
          port: 5044

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-otel-collector-to-logstash
  namespace: monitoring
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: opentelemetry-collector
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              name: monitoring
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: logstash
      ports:
        - protocol: TCP
          port: 5044

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-otel-collector-to-prometheus
  namespace: monitoring
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: opentelemetry-collector
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              name: monitoring
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: prometheus-server
      ports:
        - protocol: TCP
          port: 9090