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templates/fluent-bit/calico.netpol.yaml

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+{{- if .Values.fluentBit.calicoNetpol.enabled }}
+apiVersion: projectcalico.org/v3
+kind: NetworkPolicy
+metadata:
+  name: {{ template "fluent-bit.appName" . }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  order: 10
+  selector: dplane == 'fluent-bit'
+  types:
+    - Egress
+  egress:
+    # allow to communicate to DNS pods
+    - action: Allow
+      protocol: UDP
+      destination:
+        namespaceSelector: projectcalico.org/name == 'kube-system'
+        ports:
+          - 53
+    - action: Allow
+      protocol: TCP
+      destination:
+        namespaceSelector: projectcalico.org/name == 'kube-system'
+        ports:
+          - 53
+    # allow to communicate with itself for clustering
+    - action: Allow
+      destination:
+        selector: dplane == 'fluent-bit'
+        namespaceSelector: projectcalico.org/name == '{{ .Release.Namespace }}'
+      protocol: TCP
+    # allow to communicate with k8s api server
+    - action: Allow
+      destination:
+        services:
+          name:  kubernetes
+          namespace: default
+      protocol: TCP
+{{- end}}