Persistence

tinkerbell/stack/templates/hook.yaml

@@ -50,9 +50,16 @@ spec:
       restartPolicy: OnFailure
       volumes:
         - name: hook-artifacts
+            {{- if eq .Values.stack.hook.persistence.type "hostpath" }}
           hostPath:
             path: {{ .Values.stack.hook.downloadsDest }}
             type: DirectoryOrCreate
+            {{- else if eq .Values.stack.hook.persistence.type "pvc" }}
+          persistentVolumeClaim:
+            claimName: {{ .Values.stack.hook.persistence.pvc.existingClaim | default "hook-artifacts" }}
+            {{- else }}
+              {{- fail "value for .Values.stack.hook.persistence.type is unsupported" }}
+            {{- end }}
         - name: configmap-volume
           configMap:
             defaultMode: 0700

tinkerbell/stack/templates/nginx.yaml

@@ -123,9 +123,16 @@ spec:
       {{- end }}
       {{- if .Values.stack.hook.enabled }}
       - name: hook-artifacts
+          {{- if eq .Values.stack.hook.persistence.type "hostpath" }}
         hostPath:
           path: {{ .Values.stack.hook.downloadsDest }}
           type: DirectoryOrCreate
+          {{- else if eq .Values.stack.hook.persistence.type "pvc" }}
+        persistentVolumeClaim:
+          claimName: {{ .Values.stack.hook.persistence.pvc.existingClaim | default "hook-artifacts" }}
+          {{- else }}
+            {{- fail "value for .Values.stack.hook.persistence.type is not as expected" }}
+          {{- end }}
       {{- end }}
       {{- if and .Values.stack.relay.enabled $listenBroadcast }}
       initContainers:

tinkerbell/stack/templates/nginx_pvc.yaml

@@ -0,0 +1,29 @@
+{{- if and .Values.stack.hook.enabled (not .Values.stack.hook.persistence.pvc.existingClaim) (eq .Values.stack.hook.persistence.type "pvc") }}
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: hook-artifacts
+  labels:
+    {{- with .Values.stack.hook.persistence.pvc.extraLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+  {{- with .Values.stack.hook.persistence.pvc.annotations  }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  accessModes:
+    {{- range .Values.stack.hook.persistence.pvc.accessModes }}
+    - {{ . | quote }}
+    {{- end }}
+  resources:
+    requests:
+      storage: {{ .Values.stack.hook.persistence.pvc.size | quote }}
+  {{- with .Values.stack.hook.persistence.pvc.storageClassName }}
+  storageClassName: {{ . }}
+  {{- end }}
+  {{- with .Values.stack.hook.persistence.pvc.selector }}
+  selector: 
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

tinkerbell/stack/values.yaml

@@ -18,6 +18,8 @@ stack:
   lbClass: kube-vip.io/kube-vip-class
   # Once the Kubernetes Gateway API is more stable, we will use that for all services instead of nginx.
   image: nginx:1.25.1
+
+
   hook:
     enabled: true
     name: hook-files
@@ -27,6 +29,35 @@ stack:
     # downloadURL only works with the > 0.8.1 Hook release because
     # previous Hook versions didn't provide a checksum file.
     downloadURL: https://github.com/tinkerbell/hook/releases/download/v0.9.1
+    persistence:
+      # type must be either "hostpath" or "pvc"
+      # hostpath: only works on a single worker node cluster
+      # https://kubernetes.io/docs/concepts/storage/volumes/#hostpath
+      type: hostpath
+
+      pvc:
+        # PVC accessModes : 
+        # If you include only ReadWriteMany access mode it will allow to download Hook artifacts,
+        # it will also allow to scale up stack deployment on multinode cluster.
+        # If ReadWriteOnce is included, you will need to download manually Hook artifacts into
+        # stack Pod (/usr/share/nginx/html/).
+        # https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes
+        accessModes:
+          - ReadWriteMany
+        size: 1Gi
+        # storageClassName: default
+        # Annotations to include on the PVC object.
+        annotations: {}
+
+        # An optional selector to narrow the Volumes considered for binding to the PVC.
+        # Should be structured the same as a raw PVC selector (see documentation for more info).
+        #
+        # https://kubernetes.io/docs/concepts/storage/persistent-volumes/#selector.
+        selector: {}
+
+        # existingClaim:
+        extraLabels: {}
+
   kubevip:
     enabled: true
     name: kube-vip