add k8s-resources chart

charts/k8s-resources/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode

charts/k8s-resources/Chart.yaml

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+apiVersion: v2
+version: 1.0.0
+appVersion: 1.0.0
+type: library
+name: k8s-resources
+description: K8s resources

charts/k8s-resources/templates/_ingress.tpl

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+{{/*
+Return the appropriate apiVersion for ingress.
+*/}}
+{{- define "k8s.ingress.apiVersion" -}}
+  {{- if and (.Capabilities.APIVersions.Has "networking.k8s.io/v1") (semverCompare ">= 1.19-0" .Capabilities.KubeVersion.Version) -}}
+      {{- print "networking.k8s.io/v1" -}}
+  {{- else if .Capabilities.APIVersions.Has "networking.k8s.io/v1beta1" -}}
+    {{- print "networking.k8s.io/v1beta1" -}}
+  {{- else -}}
+    {{- print "extensions/v1beta1" -}}
+  {{- end -}}
+{{- end -}}
+
+{{/*
+Return if ingress is stable.
+*/}}
+{{- define "k8s.ingress.isStable" -}}
+  {{- eq (include "k8s.ingress.apiVersion" .) "networking.k8s.io/v1" -}}
+{{- end -}}
+
+{{/*
+Return if ingress supports ingressClassName.
+*/}}
+{{- define "k8s.ingress.supportsIngressClassName" -}}
+  {{- or (eq (include "k8s.ingress.isStable" .) "true") (and (eq (include "k8s.ingress.apiVersion" .) "networking.k8s.io/v1beta1") (semverCompare ">= 1.18-0" .Capabilities.KubeVersion.Version)) -}}
+{{- end -}}
+
+{{/*
+Return if ingress supports pathType.
+*/}}
+{{- define "k8s.ingress.supportsPathType" -}}
+  {{- or (eq (include "k8s.ingress.isStable" .) "true") (and (eq (include "k8s.ingress.apiVersion" .) "networking.k8s.io/v1beta1") (semverCompare ">= 1.18-0" .Capabilities.KubeVersion.Version)) -}}
+{{- end -}}