Allow persistentStorage - opens up multinode

fixes #42 for me

Signed-off-by: Randall Mason <Randall@Mason.CH>

tinkerbell/stack/templates/nginx.yaml

@@ -84,17 +84,40 @@ spec:
       {{- end }}
       volumes:
       {{- if .Values.stack.hook.enabled }}
+      {{- not if .Values.stack.hook.persistentStorage }}
       - name: hook-artifacts
         hostPath:
           path: {{ .Values.stack.hook.downloadsDest }}
           type: DirectoryOrCreate
       {{- end }}
+      {{- if .Values.stack.hook.persistentStorage }}
+      - name: hook-artifacts
+        persistentVolumeClaim:
+          claimName: hook-artifacts
+      {{- end }}
+      {{- end }}
       - name: nginx-conf
         configMap:
           name: nginx-conf
           items:
             - key: nginx.conf
               path: nginx.conf.template
+{{- if .Values.stack.hook.persistentStorage }}
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: hook-artifacts
+spec:
+  {{- if .Values.stack.hook.storageClass }}
+  storageClassName: {{ .Values.stack.hook.storageClass }}
+  {{- end }}
+  accessModes:
+  - ReadWriteMany
+  resources:
+    requests:
+      storage: 50Gi
+{{- end }}
 {{- if .Values.stack.service.enabled }}
 ---
 apiVersion: v1

tinkerbell/stack/values.yaml

@@ -18,6 +18,8 @@ stack:
     port: 8080
     image: alpine
     downloadsDest: /opt/hook
+    persistentStorage: true
+    storageClass: ceph-filesystem
     downloads:
       - url: https://github.com/tinkerbell/hook/releases/download/v0.8.1/hook_x86_64.tar.gz
         sha512sum: 29d8cf6991272eea20499d757252b07deba824eb778368192f9ab88b215a0dafa584e83422dac08feeb43ddce65f485557ad66210f005a81ab95fb53b7d8d424