Add ingress support

charts/maildev/templates/_helpers.tpl

@@ -61,3 +61,41 @@ Create the name of the service account to use
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}
 {{- end }}
+
+{{/*
+Get KubeVersion removing pre-release information.
+*/}}
+{{- define "maildev.kubeVersion" -}}
+  {{- default .Capabilities.KubeVersion.Version (regexFind "v[0-9]+\\.[0-9]+\\.[0-9]+" .Capabilities.KubeVersion.Version) -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for ingress.
+*/}}
+{{- define "maildev.ingress.apiVersion" -}}
+  {{- if and (.Capabilities.APIVersions.Has "networking.k8s.io/v1") (semverCompare ">= 1.19.x" (include "maildev.kubeVersion" .)) -}}
+      {{- 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 "maildev.ingress.isStable" -}}
+  {{- eq (include "maildev.ingress.apiVersion" .) "networking.k8s.io/v1" -}}
+{{- end -}}
+{{/*
+Return if ingress supports ingressClassName.
+*/}}
+{{- define "maildev.ingress.supportsIngressClassName" -}}
+  {{- or (eq (include "maildev.ingress.isStable" .) "true") (and (eq (include "maildev.ingress.apiVersion" .) "networking.k8s.io/v1beta1") (semverCompare ">= 1.18.x" (include "maildev.kubeVersion" .))) -}}
+{{- end -}}
+{{/*
+Return if ingress supports pathType.
+*/}}
+{{- define "maildev.ingress.supportsPathType" -}}
+  {{- or (eq (include "maildev.ingress.isStable" .) "true") (and (eq (include "maildev.ingress.apiVersion" .) "networking.k8s.io/v1beta1") (semverCompare ">= 1.18.x" (include "maildev.kubeVersion" .))) -}}
+{{- end -}}

charts/maildev/templates/ingress.yaml

@@ -0,0 +1,78 @@
+{{- if .Values.ingress.enabled -}}
+{{- $ingressApiIsStable := eq (include "maildev.ingress.isStable" .) "true" -}}
+{{- $ingressSupportsIngressClassName := eq (include "maildev.ingress.supportsIngressClassName" .) "true" -}}
+{{- $ingressSupportsPathType := eq (include "maildev.ingress.supportsPathType" .) "true" -}}
+{{- $fullName := include "maildev.fullname" . -}}
+{{- $serviceName := printf "%s-web" $fullName -}}
+{{- $servicePort := .Values.ports.web -}}
+{{- $ingressPath := .Values.ingress.path -}}
+{{- $ingressPathType := .Values.ingress.pathType -}}
+{{- $extraPaths := .Values.ingress.extraPaths -}}
+apiVersion: {{ include "maildev.ingress.apiVersion" . }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "maildev.labels" . | nindent 4 }}
+{{- if .Values.ingress.labels }}
+{{ toYaml .Values.ingress.labels | indent 4 }}
+{{- end }}
+  {{- if .Values.ingress.annotations }}
+  annotations:
+    {{- range $key, $value := .Values.ingress.annotations }}
+    {{ $key }}: {{ tpl $value $ | quote }}
+    {{- end }}
+  {{- end }}
+spec:
+  {{- if and $ingressSupportsIngressClassName .Values.ingress.ingressClassName }}
+  ingressClassName: {{ .Values.ingress.ingressClassName }}
+  {{- end -}}
+{{- if .Values.ingress.tls }}
+  tls:
+{{ tpl (toYaml .Values.ingress.tls) $ | indent 4 }}
+{{- end }}
+  rules:
+  {{- if .Values.ingress.hosts  }}
+  {{- range .Values.ingress.hosts }}
+    - host: {{ tpl . $}}
+      http:
+        paths:
+{{- if $extraPaths }}
+{{ toYaml $extraPaths | indent 10 }}
+{{- end }}
+          - path: {{ $ingressPath }}
+            {{- if $ingressSupportsPathType }}
+            pathType: {{ $ingressPathType }}
+            {{- end }}
+            backend:
+              {{- if $ingressApiIsStable }}
+              service:
+                name: {{ $serviceName }}
+                port:
+                  number: {{ $servicePort }}
+              {{- else }}
+              serviceName: {{ $serviceName }}
+              servicePort: {{ $servicePort }}
+              {{- end }}
+  {{- end }}
+  {{- else }}
+    - http:
+        paths:
+          - backend:
+              {{- if $ingressApiIsStable }}
+              service:
+                name: {{ $serviceName }}
+                port:
+                  number: {{ $servicePort }}
+              {{- else }}
+              serviceName: {{ $serviceName }}
+              servicePort: {{ $servicePort }}
+              {{- end }}
+            {{- if $ingressPath }}
+            path: {{ $ingressPath }}
+            {{- end }}
+            {{- if $ingressSupportsPathType }}
+            pathType: {{ $ingressPathType }}
+            {{- end }}
+  {{- end -}}
+{{- end }}

charts/maildev/values.yaml

@@ -76,6 +76,44 @@ securityContext: {}
 service:
   type: ClusterIP
 
+ingress:
+  enabled: false
+  # For Kubernetes >= 1.18 you should specify the ingress-controller via the field ingressClassName
+  # See https://kubernetes.io/blog/2020/04/02/improvements-to-the-ingress-api-in-kubernetes-1.18/#specifying-the-class-of-an-ingress
+  # ingressClassName: nginx
+  # Values can be templated
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  labels: {}
+  path: /
+
+  # pathType is only for k8s >= 1.18
+  pathType: Prefix
+
+  hosts:
+    - chart-example.local
+  ## Extra paths to prepend to every host configuration. This is useful when working with annotation based services.
+  extraPaths: []
+  # - path: /*
+  #   backend:
+  #     serviceName: ssl-redirect
+  #     servicePort: use-annotation
+  ## Or for k8s > 1.19
+  # - path: /*
+  #   pathType: Prefix
+  #   backend:
+  #     service:
+  #       name: ssl-redirect
+  #       port:
+  #         name: service
+
+
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
 resources: {}
   # We usually recommend not to specify default resources and to leave this as a conscious
   # choice for the user. This also increases chances charts run on environments with little