make deployment apiVersion dependent on k8s version

Author: Knappek

deployment/helm/reactive-interaction-gateway/templates/_helpers.tpl

@@ -30,3 +30,14 @@ Create chart name and version as used by the chart label.
 {{- define "reactive-interaction-gateway.chart" -}}
 {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
+
+{{/*
+Return the appropriate apiVersion for deployment.
+*/}}
+{{- define "deployment.apiVersion" -}}
+{{- if semverCompare ">=1.9-0" .Capabilities.KubeVersion.GitVersion -}}
+{{- print "apps/v1" -}}
+{{- else -}}
+{{- print "apps/v1beta2" -}}
+{{- end -}}
+{{- end -}}

deployment/helm/reactive-interaction-gateway/templates/deployment.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1
+apiVersion: {{ template "deployment.apiVersion" . }}
 kind: Deployment
 metadata:
   name: {{ template "reactive-interaction-gateway.name" . }}