helm: add location for setting PodDisruptionBudget

Signed-off-by: Pat Riehecky <riehecky@fnal.gov>

deploy/chart/local-path-provisioner/templates/pdb.yaml

+{{- if .Values.podDisruptionBudget.enabled -}}
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "local-path-provisioner.fullname" . }}
+  namespace: {{ include "local-path-provisioner.namespace" . }}
+  labels:
+{{ include "local-path-provisioner.labels" . | indent 4 }}
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "local-path-provisioner.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+{{- toYaml (omit .Values.podDisruptionBudget "enabled") | indent 2 }}
+{{- end -}}

deploy/chart/local-path-provisioner/values.yaml

@@ -146,6 +146,9 @@ tolerations: []
 
 affinity: {}
 
+podDisruptionBudget:
+  enabled: false
+
 configmap:
   # specify the config map name
   name: local-path-config