gerrit: charts and app configuration

Change-Id: If4f05f749719d6ba0e2ced8da563699bc6fbc4c0
diff --git a/charts/gerrit/templates/git-gc.storage.yaml b/charts/gerrit/templates/git-gc.storage.yaml
new file mode 100644
index 0000000..c69a647
--- /dev/null
+++ b/charts/gerrit/templates/git-gc.storage.yaml
@@ -0,0 +1,22 @@
+{{ if .Values.gitGC.logging.persistence.enabled -}}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: {{ .Release.Name }}-git-gc-logs-pvc
+  labels:
+    app.kubernetes.io/component: git-gc
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    chart: {{ template "gerrit.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+    {{- if .Values.additionalLabels }}
+{{ toYaml .Values.additionalLabels  | indent 4 }}
+    {{- end }}
+spec:
+  accessModes:
+  - ReadWriteOnce
+  resources:
+    requests:
+      storage: {{ .Values.gitGC.logging.persistence.size }}
+  storageClassName: {{ .Values.storageClasses.default.name }}
+{{- end }}