k8s/loki/loki-stack/charts/promtail/templates/networkpolicy.yaml

{{- if .Values.networkPolicy.enabled }}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ template "promtail.name" . }}-namespace-only
  namespace: {{ include "promtail.namespaceName" . }}
  labels:
    {{- include "promtail.labels" . | nindent 4 }}
spec:
  podSelector: {}
  policyTypes:
    - Ingress
    - Egress
  egress:
    - to:
        - podSelector: {}
  ingress:
    - from:
        - podSelector: {}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ template "promtail.name" . }}-egress-dns
  namespace: {{ include "promtail.namespaceName" . }}
  labels:
    {{- include "promtail.labels" . | nindent 4 }}
spec:
  podSelector:
    matchLabels:
      {{- include "promtail.selectorLabels" . | nindent 6 }}
  policyTypes:
    - Egress
  egress:
    - ports:
        - port: 53
          protocol: UDP
      to:
        - namespaceSelector: {}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ template "promtail.name" . }}-egress-k8s-api
  namespace: {{ include "promtail.namespaceName" . }}
  labels:
    {{- include "promtail.labels" . | nindent 4 }}
spec:
  podSelector:
    matchLabels:
      {{- include "promtail.selectorLabels" . | nindent 6 }}
  policyTypes:
    - Egress
  egress:
    - ports:
        - port: {{ .Values.networkPolicy.k8sApi.port }}
          protocol: TCP
      {{- if len .Values.networkPolicy.k8sApi.cidrs }}
      to:
        {{- range $cidr := .Values.networkPolicy.k8sApi.cidrs }}
        - ipBlock:
            cidr: {{ $cidr }}
        {{- end }}
      {{- end }}

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ template "promtail.name" . }}-ingress-metrics
  namespace: {{ include "promtail.namespaceName" . }}
  labels:
    {{- include "promtail.labels" . | nindent 4 }}
spec:
  podSelector:
    matchLabels:
      {{- include "promtail.selectorLabels" . | nindent 6 }}
  policyTypes:
    - Ingress
  ingress:
    - ports:
        - port: http-metrics
          protocol: TCP
      {{- if len .Values.networkPolicy.metrics.cidrs }}
      from:
        {{- range $cidr := .Values.networkPolicy.metrics.cidrs }}
        - ipBlock:
            cidr: {{ $cidr }}
        {{- end }}
        {{- if .Values.networkPolicy.metrics.namespaceSelector }}
        - namespaceSelector:
            {{- toYaml .Values.networkPolicy.metrics.namespaceSelector | nindent 12 }}
          {{- if .Values.networkPolicy.metrics.podSelector }}
          podSelector:
            {{- toYaml .Values.networkPolicy.metrics.podSelector | nindent 12 }}
          {{- end }}
        {{- end }}
      {{- end }}

{{- if .Values.extraPorts }}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ template "promtail.name" . }}-egress-extra-ports
  namespace: {{ include "promtail.namespaceName" . }}
  labels:
    {{- include "promtail.labels" . | nindent 4 }}
spec:
  podSelector:
    matchLabels:
      {{- include "promtail.selectorLabels" . | nindent 6 }}
  policyTypes:
    - Egress
  egress:
    - ports:
        {{- range $extraPortConfig := .Values.extraPorts }}
        - port: {{ $extraPortConfig.containerPort }}
          protocol: {{ $extraPortConfig.protocol }}
        {{- end }}
{{- end }}
{{- end }}