Update helm Ingress template to be cross-compatible with recent k8s versions (#2275)

* Update ingress template to render conditionally based on k8s version

Signed-off-by: John Lukenoff <johnlukenoff@asana.com>

* Extraneous end

Signed-off-by: John Lukenoff <johnlukenoff@asana.com>

Signed-off-by: John Lukenoff <johnlukenoff@asana.com>
Co-authored-by: Willy Lulciuc <willy@datakin.com>

Author: jlukenoff

chart/templates/ingress.yaml

@@ -1,5 +1,11 @@
 {{- if .Values.ingress.enabled -}}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
 apiVersion: extensions/v1beta1
+{{- end }}
 kind: Ingress
 metadata:
   name: {{ include "common.names.fullname" . }}
@@ -15,6 +21,9 @@ metadata:
     {{ $key }}: {{ include "common.tplvalues.render" (dict "value" $value "context" $) | quote }}
     {{- end }}
 spec:
+{{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+{{- end }}
 {{- if .Values.ingress.tls }}
   tls:
   {{- range .Values.ingress.tls }}
@@ -31,12 +40,32 @@ spec:
       http:
         paths:
           - path: /api/
+            {{- if semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion }}
+            pathType: Prefix
+            {{- end }}
             backend:
+            {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ include "common.names.fullname" $ }}
+                port:
+                  name: http
+            {{- else }}
               serviceName: {{ include "common.names.fullname" $ }}
               servicePort: http
+            {{- end }}
           - path: /
+            {{- if semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion }}
+            pathType: Prefix
+            {{- end }}
             backend:
+            {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ include "common.names.fullname" $ }}-web
+                port:
+                  name: http
+            {{- else }}
               serviceName: {{ include "common.names.fullname" $ }}-web
               servicePort: http
+            {{- end }}
   {{- end }}
 {{- end }}