Fix #19 (new kubernetes API version)

This is a signed squash of unsigned commits made by both
Andrew <andrew@egeler.us> and Travis Loyd <fun.tloyd@gmail.com>. It is a
slight cleanup of Travis Loyd's PR #27

Travis Loyd <fun.tloyd@gmail.com>:
* Fix for issue number 19, current api version and previous api version need to be updated
* Added helm if statement to handle previous ingress 'http paths' style and current 'http paths' style
* adjusted helm if statement to accomidate scoping by setting as a variable up top
* moved new apiVersion variable to the top just under check for ingress enabled
* added ingressClassName and set a default value of 'nginx' in the values file

Andrew <andrew@egeler.us>:
* PR Change Cleanup
  * rename $apiVersion to $apiVersions
  * rename ingress.ingressClassName to ingress.className
  * add documentation entry for ingress.className
* fix README default value

README.md

@@ -95,6 +95,7 @@ their default values.
 | `ingress.path`              | Ingress service path                                                                       | `/`             |
 | `ingress.hosts`             | Ingress hostnames                                                                          | `[]`            |
 | `ingress.tls`               | Ingress TLS configuration (YAML)                                                           | `[]`            |
+| `ingress.className`         | Ingress controller class name                                                              | `nginx`         |
 | `metrics.enabled`           | Enable metrics on Service                                                                  | `false`         |
 | `metrics.port`              | TCP port on which the service metrics is exposed                                           | `5001`          |
 | `metrics.serviceMonitor.annotations` | Prometheus Operator ServiceMonitor annotations                                    | `{}`            |

templates/ingress.yaml

@@ -1,8 +1,9 @@
 {{- if .Values.ingress.enabled -}}
+{{- $apiVersions := .Capabilities.APIVersions -}}
 {{- $serviceName := include "docker-registry.fullname" . -}}
 {{- $servicePort := .Values.service.port -}}
 {{- $path := .Values.ingress.path -}}
-apiVersion: {{- if .Capabilities.APIVersions.Has "networking.k8s.io/v1beta1" }} networking.k8s.io/v1beta1 {{- else }} extensions/v1beta1 {{- end }}
+apiVersion: {{- if $apiVersions.Has "networking.k8s.io/v1" }} networking.k8s.io/v1 {{- else }} networking.k8s.io/v1beta1 {{- end }}
 kind: Ingress
 metadata:
   name: {{ template "docker-registry.fullname" . }}
@@ -20,15 +21,27 @@ metadata:
       {{ $key }}: {{ $value | quote }}
     {{- end }}
 spec:
+{{- if $apiVersions.Has "networking.k8s.io/v1" }}
+  ingressClassName: {{ .Values.ingress.className }}
+{{- end }}
   rules:
     {{- range $host := .Values.ingress.hosts }}
     - host: {{ $host }}
       http:
         paths:
           - path: {{ $path }}
+{{- if $apiVersions.Has "networking.k8s.io/v1" }}
+            pathType: Prefix
+            backend:
+              service:
+                name: {{ $serviceName }}
+                port:
+                  number: {{ $servicePort }}
+{{- else }}
             backend:
               serviceName: {{ $serviceName }}
               servicePort: {{ $servicePort }}
+{{- end }}
     {{- end -}}
   {{- if .Values.ingress.tls }}
   tls:

values.yaml

@@ -37,6 +37,7 @@ service:
   # foo.io/bar: "true"
 ingress:
   enabled: false
+  className: nginx
   path: /
   # Used to create an Ingress record.
   hosts: