[stable/docker-registry] Update apiVersion for Kubernetes 1.16 support (#22316)

* Update apiVersion for Kubernetes 1.16 support

Signed-off-by: Alex Voloshyn <alex@geeoz.com>

* Add support for Kubernetes older than 1.16

Signed-off-by: Alex Voloshyn <alex@geeoz.com>

* Update according to the review comment

Signed-off-by: Alex Voloshyn <alex@geeoz.com>

* Simplified check

Signed-off-by: Alex Voloshyn <alex@geeoz.com>

stable/docker-registry/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: A Helm chart for Docker Registry
 name: docker-registry
-version: 1.9.2
+version: 1.9.3
 appVersion: 2.7.1
 home: https://hub.docker.com/_/registry/
 icon: https://hub.docker.com/public/images/logos/mini-logo.svg

stable/docker-registry/templates/ingress.yaml

@@ -2,7 +2,7 @@
 {{- $serviceName := include "docker-registry.fullname" . -}}
 {{- $servicePort := .Values.service.port -}}
 {{- $path := .Values.ingress.path -}}
-apiVersion: extensions/v1beta1
+apiVersion: {{- if .Capabilities.APIVersions.Has "networking.k8s.io/v1beta1" }} networking.k8s.io/v1beta1 {{- else }} extensions/v1beta1 {{- end }}
 kind: Ingress
 metadata:
   name: {{ template "docker-registry.fullname" . }}