deploy-templates/templates/jenkins/persistent_volume_claim.yaml

{{- $storageClassName := .Values.jenkins.storage.class -}}
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins-data
  labels:
    app: jenkins
    {{- include "jenkins-operator.labels" . | nindent 4 }}
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: {{ .Values.jenkins.storage.size }}
{{ if $storageClassName }}
  storageClassName: "{{ $storageClassName }}"
{{ end }}
  volumeMode: Filesystem