add className for chronograf (#354)

charts/chronograf/Chart.yaml

 apiVersion: v1
 name: chronograf
-version: 1.2.0
+version: 1.2.1
 appVersion: 1.9.1
 description: Open-source web application written in Go and React.js that provides
   the tools to visualize your monitoring data and easily create alerting and automation

charts/chronograf/templates/ingress.yaml

@@ -17,6 +17,9 @@ spec:
       - {{ .Values.ingress.hostname | quote }}
       secretName: {{ .Values.ingress.secretName | default (printf "%s-tls" (include "chronograf.fullname" .)) }}
 {{- end }}
+{{- if .Values.ingress.className }}
+  ingressClassName: {{ .Values.ingress.className }}
+{{- end }}
   rules:
   - host: {{ .Values.ingress.hostname }}
     http:
@@ -25,4 +28,4 @@ spec:
         backend:
           serviceName: {{ template "chronograf.fullname" . }}
           servicePort: 80
-{{- end -}}
\ No newline at end of file
+{{- end -}}

charts/chronograf/values.yaml

@@ -64,6 +64,7 @@ ingress:
   enabled: false
   tls: false
   hostname: chronograf.foobar.com
+  className: null
   annotations: {}
     # kubernetes.io/ingress.class: "nginx"
     # secretName: my-tls-cert