[kube-prometheus-stack] Add dnsPolicy for alertmanager and prometheus (#6021)

Author: araiu

charts/kube-prometheus-stack/Chart.yaml

@@ -31,7 +31,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 75.17.1
+version: 75.18.0
 # renovate: github=prometheus-operator/prometheus-operator
 appVersion: v0.83.0
 kubeVersion: ">=1.25.0-0"

charts/kube-prometheus-stack/templates/alertmanager/alertmanager.yaml

@@ -104,6 +104,9 @@ spec:
   dnsConfig:
 {{ toYaml .Values.alertmanager.alertmanagerSpec.dnsConfig | indent 4 }}
 {{- end }}
+{{- if .Values.alertmanager.alertmanagerSpec.dnsPolicy }}
+  dnsPolicy: {{ .Values.alertmanager.alertmanagerSpec.dnsPolicy }}
+{{- end }}
 {{- if .Values.alertmanager.alertmanagerSpec.storage }}
   storage:
 {{ tpl (toYaml .Values.alertmanager.alertmanagerSpec.storage | indent 4) . }}

charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml

@@ -257,6 +257,9 @@ spec:
   dnsConfig:
 {{ toYaml .Values.prometheus.prometheusSpec.dnsConfig | indent 4 }}
 {{- end }}
+{{- if .Values.prometheus.prometheusSpec.dnsPolicy }}
+  dnsPolicy: {{ .Values.prometheus.prometheusSpec.dnsPolicy }}
+{{- end }}
 {{- if not .Values.prometheus.agentMode }}
 {{- if .Values.prometheus.prometheusSpec.ruleNamespaceSelector }}
   ruleNamespaceSelector:

charts/kube-prometheus-stack/values.yaml

@@ -1123,6 +1123,10 @@ alertmanager:
     ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#monitoring.coreos.com/v1.PodDNSConfig
     dnsConfig: {}
 
+    ## DNS policy for Alertmanager.
+    ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#dnspolicystring-alias
+    dnsPolicy: ""
+
     ## ListenLocal makes the Alertmanager server listen on loopback, so that it does not bind against the Pod IP.
     ## Note this is only for the Alertmanager UI, not the gossip communication.
     ##
@@ -4470,6 +4474,10 @@ prometheus:
     ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#monitoring.coreos.com/v1.PodDNSConfig
     dnsConfig: {}
 
+    ## DNS policy for Prometheus.
+    ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#dnspolicystring-alias
+    dnsPolicy: ""
+
     ## Priority class assigned to the Pods
     ##
     priorityClassName: ""