chore: add dnsPolicy and dnsConfig support to pod template

parcellab/common/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: common
 description: A Helm chart library for parcelLab charts
 type: library
-version: 1.3.5
+version: 1.3.6
 maintainers:
   - name: parcelLab
     email: engineering@parcellab.com

parcellab/common/templates/_pod.tpl

@@ -24,6 +24,8 @@
 {{- $datadog := .Values.datadog -}}
 {{- $type := default "service" .type -}}
 {{- $securityContext := .Values.securityContext -}}
+{{- $dnsConfig := default .Values.dnsConfig .pod.dnsConfig -}}
+{{- $dnsPolicy := default .Values.dnsPolicy .pod.dnsPolicy -}}
 metadata:
   annotations:
     {{- if and $datadog $datadog.enabled }}
@@ -55,6 +57,13 @@ spec:
   hostAliases:
     {{- toYaml . | nindent 4 }}
   {{- end }}
+  {{- if $dnsPolicy }}
+  dnsPolicy: {{ $dnsPolicy }}
+  {{- end }}
+  {{- if $dnsConfig }}
+  dnsConfig:
+    {{- toYaml $dnsConfig | nindent 4 }}
+  {{- end }}
   terminationGracePeriodSeconds: {{ default 30 .Values.terminationGracePeriodSeconds }}
   volumes:
     {{- if $podVolumes }}

parcellab/common/values.yaml

@@ -66,3 +66,16 @@ vpa:
   mode: "Auto"
 initContainers: []
 extraContainers: []
+# dnsPolicy defines how DNS resolution is handled for pods.
+# Common values: "ClusterFirst" (default), "None" (requires dnsConfig), "Default", "ClusterFirstWithHostNet".
+# Set to "None" when you want full control over DNS settings via dnsConfig.
+# dnsPolicy: ClusterFirst
+
+# dnsConfig allows fine-grained control over DNS settings for pods.
+# The most common use case is adjusting ndots to reduce unnecessary DNS lookups.
+# dnsConfig:
+#   options:
+#     - name: ndots
+#       value: "2"
+#   nameservers: []
+#   searches: []

parcellab/cronjob/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: cronjob
 description: Single cron job
-version: 0.5.0
+version: 0.5.1
 dependencies:
   - name: common
     version: "*"

parcellab/cronjob/values.yaml

@@ -58,6 +58,17 @@ externalSecret:
 
 affinity: {}
 
+# dnsPolicy: "None"
+
+# dnsConfig:
+#   nameservers:
+#     - 1.1.1.1
+#   searches:
+#     - my-namespace.svc.cluster.local
+#   options:
+#     - name: ndots
+#       value: "2"
+
 datadog:
   enabled: true
 

parcellab/microservice/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: microservice
 description: Simple microservice
-version: 0.5.5
+version: 0.5.6
 dependencies:
   - name: common
     version: "*"

parcellab/microservice/values.yaml

@@ -337,6 +337,20 @@ strategy:
 
 tolerations: []
 
+# dnsPolicy defines how DNS resolution is handled for pods.
+# When using dnsConfig with custom options (e.g. ndots), you typically want
+# to set dnsPolicy to "None" or keep the default "ClusterFirst".
+# dnsPolicy: ClusterFirst
+
+# dnsConfig allows fine-grained control over DNS settings for pods.
+# The most common use case is adjusting ndots to reduce unnecessary DNS lookups.
+# dnsConfig:
+#   options:
+#     - name: ndots
+#       value: "2"
+#   nameservers: []
+#   searches: []
+
 volumes: []
 
 ##

parcellab/monolith/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: monolith
 description: Application that may define multiple services and cronjobs
-version: 0.5.6
+version: 0.5.7
 dependencies:
   - name: common
     version: "*"

parcellab/monolith/values.yaml

@@ -433,6 +433,21 @@ vpa:
 
 affinity: {}
 
+# dnsPolicy defines how DNS resolution is handled for the pod.
+# Common values: "ClusterFirst" (default), "None" (requires dnsConfig), "Default", "ClusterFirstWithHostNet".
+# Set to "None" when you want full control over DNS settings via dnsConfig.
+# dnsPolicy: ClusterFirst
+
+# dnsConfig allows you to customize the DNS settings for the pod.
+# When dnsPolicy is set to "None", all DNS settings must be provided here.
+# ndots controls the number of dots in a name before an absolute lookup is made.
+# dnsConfig:
+#   nameservers: []
+#   options:
+#     - name: ndots
+#       value: "2"
+#   searches: []
+
 datadog:
   enabled: true
 

parcellab/worker-group/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: worker-group
 description: Set of workers that do not expose a service
-version: 0.3.3
+version: 0.3.4
 dependencies:
   - name: common
     version: "*"

parcellab/worker-group/values.yaml

@@ -176,6 +176,21 @@ strategy:
 
 tolerations: []
 
+# dnsPolicy defines how DNS resolution is handled for the pod.
+# Common values: "ClusterFirst" (default), "None" (requires dnsConfig), "Default", "ClusterFirstWithHostNet".
+# Set to "None" when you want full control over DNS settings via dnsConfig.
+# dnsPolicy: ClusterFirst
+
+# dnsConfig allows you to customize the DNS settings for the pod.
+# When dnsPolicy is set to "None", all DNS settings must be provided here.
+# ndots controls the number of dots in a name before an absolute lookup is made.
+# dnsConfig:
+#   nameservers: []
+#   options:
+#     - name: ndots
+#       value: "2"
+#   searches: []
+
 volumes: []
 
 ##