Longhorn: Upgrade from 1.6.4. to 1.7.3

Change-Id: I4e713a453a6b9e983685e2db550066fd2694609f
diff --git a/charts/longhorn-1.6.4/templates/ingress.yaml b/charts/longhorn-1.6.4/templates/ingress.yaml
new file mode 100644
index 0000000..9038ff0
--- /dev/null
+++ b/charts/longhorn-1.6.4/templates/ingress.yaml
@@ -0,0 +1,37 @@
+{{- if .Values.ingress.enabled }}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: longhorn-ingress
+  namespace: {{ include "release_namespace" . }}
+  labels: {{- include "longhorn.labels" . | nindent 4 }}
+    app: longhorn-ingress
+  annotations:
+    {{- if .Values.ingress.secureBackends }}
+    ingress.kubernetes.io/secure-backends: "true"
+    {{- end }}
+    {{- range $key, $value := .Values.ingress.annotations }}
+    {{ $key }}: {{ $value | quote }}
+    {{- end }}
+spec:
+  {{- if .Values.ingress.ingressClassName }}
+  ingressClassName: {{ .Values.ingress.ingressClassName }}
+  {{- end }}
+  rules:
+  - host: {{ .Values.ingress.host }}
+    http:
+      paths:
+        - path: {{ default "" .Values.ingress.path }}
+          pathType: ImplementationSpecific
+          backend:
+            service:
+              name: longhorn-frontend
+              port:
+                number: 80
+{{- if .Values.ingress.tls }}
+  tls:
+  - hosts:
+    - {{ .Values.ingress.host }}
+    secretName: {{ .Values.ingress.tlsSecret }}
+{{- end }}
+{{- end }}