Add helm template for PodDisruptionBudget of controller Deployment

Author: MM53

chart/templates/poddisruptionbudget.yaml

@@ -0,0 +1,26 @@
+{{/*
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: BUSL-1.1
+*/}}
+
+{{- if and (gt (int .Values.controller.replicas) 1) .Values.controller.podDisruptionBudget.enabled }}
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "vso.chart.fullname" . }}
+  labels:
+    app.kubernetes.io/component: controller-manager
+    control-plane: controller-manager
+    {{- include "vso.chart.labels" . | nindent 4 }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  {{- if (gt (int .Values.controller.podDisruptionBudget.maxUnavailable) 0) }}
+  maxUnavailable: {{ .Values.controller.podDisruptionBudget.maxUnavailable }}
+  {{- end }}
+  {{- if (gt (int .Values.controller.podDisruptionBudget.minAvailable) 0) }}
+  minAvailable: {{ .Values.controller.podDisruptionBudget.minAvailable }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "vso.chart.selectorLabels" . | nindent 6 }}
+{{- end }}

chart/values.yaml

@@ -66,6 +66,23 @@ controller:
   #           - antarctica-west1
   affinity: {}
 
+  # Configure the PodDisruptionBudget for the controller deployment.
+  podDisruptionBudget:
+
+    # toggles the deployment of the PodDisruptionBudget for the controller.
+    # @type: boolean
+    enabled: false
+
+    # Sets the maximum number of pods that can be unavailable during the eviction.
+    # This field cannot be set if minAvailable is set.
+    # @type: integer
+    maxUnavailable: 0
+
+    # Sets the numer of pods that must be available during the eviction.
+    # This field cannot be set if maxUnavailable is set.
+    # @type: integer
+    minAvailable: 1
+
   rbac:
     # clusterRoleAggregation defines the roles included in the aggregated ClusterRole.
     clusterRoleAggregation: