[COMMON] Add pre/postfix and customized port option for Istio Ingress

Add new options for the created Ingress URLs (preaddr, postaddr)
and allow to create Ingress configurations using customized ports
Correction added to the installation of the Ingress Gateway.

Issue-ID: OOM-3084

Signed-off-by: Andreas Geissler <andreas-geissler@telekom.de>
Change-Id: Ib31050c169799409c6e968adce7ff41e215e3ff9

1 files changed, 63 insertions, 23 deletions

diff --git a/kubernetes/common/common/templates/_ingress.tpl b/kubernetes/common/common/templates/_ingress.tpl
index d8a944712a..7065338cf9 100644
--- a/kubernetes/common/common/templates/_ingress.tpl
+++ b/kubernetes/common/common/templates/_ingress.tpl
@@ -23,45 +23,87 @@
 {{- define "ingress.config.host" -}}
 {{-   $dot := default . .dot -}}
 {{-   $baseaddr := (required "'baseaddr' param, set to the specific part of the fqdn, is required." .baseaddr) -}}
+{{-   $preaddr := default "" $dot.Values.global.ingress.virtualhost.preaddr -}}
+{{-   $preaddr := include "common.ingress._overrideIfDefined" (dict "currVal" $preaddr "parent" (default (dict) $dot.Values.ingress) "var" "preaddrOverride") -}}
+{{-   $postaddr := default "" $dot.Values.global.ingress.virtualhost.postaddr -}}
+{{-   $postaddr := include "common.ingress._overrideIfDefined" (dict "currVal" $postaddr "parent" (default (dict) $dot.Values.ingress) "var" "postaddrOverride") -}}
 {{-   $burl := (required "'baseurl' param, set to the generic part of the fqdn, is required." $dot.Values.global.ingress.virtualhost.baseurl) -}}
 {{-   $burl := include "common.ingress._overrideIfDefined" (dict "currVal" $burl "parent" (default (dict) $dot.Values.ingress) "var" "baseurlOverride") -}}
-{{ printf "%s.%s" $baseaddr $burl }}
+{{ printf "%s%s%s.%s" $preaddr $baseaddr $postaddr $burl }}
 {{- end -}}
 
 {{/*
-  Helper function to add the tls route
+  Istio Helper function to add the tls route
 */}}
-{{- define "ingress.config.tls" -}}
+{{- define "istio.config.tls_simple" -}}
 {{-   $dot := default . .dot -}}
-{{-   $baseaddr := (required "'baseaddr' param, set to the specific part of the fqdn, is required." .baseaddr) -}}
+    tls:
 {{-   if $dot.Values.global.ingress.config }}
-{{-     if $dot.Values.global.ingress.config.ssl }}
-{{-       if eq $dot.Values.global.ingress.config.ssl "redirect" }}
+{{-     if $dot.Values.global.ingress.config.tls }}
+      credentialName: {{ default "ingress-tls-secret" $dot.Values.global.ingress.config.tls.secret }}
+{{-     else }}
+      credentialName: "ingress-tls-secret"
+{{-     end }}
+{{-   else }}
+      credentialName: "ingress-tls-secret"
+{{-   end }}
+      mode: SIMPLE
+{{- end -}}
+
+{{/*
+  Istio Helper function to add the tls route
+*/}}
+{{- define "istio.config.tls" -}}
+{{-   $dot := default . .dot -}}
+{{-   $service := (required "'service' param, set to the specific service, is required." .service) -}}
+{{-   $baseaddr := (required "'baseaddr' param, set to the specific part of the fqdn, is required." .baseaddr) -}}
+{{-   if $service.exposedPort }}
+{{-     if $service.exposedProtocol }}
+{{-       if eq $service.exposedProtocol "TLS" }}
+    {{ include "istio.config.tls_simple" (dict "dot" $dot ) }}
+{{-       end }}
+{{-     end }}
+{{-   else }}
+{{-     if $dot.Values.global.ingress.config }}
+{{-       if $dot.Values.global.ingress.config.ssl }}
+{{-         if eq $dot.Values.global.ingress.config.ssl "redirect" }}
     tls:
       httpsRedirect: true
   - port:
       number: 443
       name: https
       protocol: HTTPS
-    tls:
-{{-         if $dot.Values.global.ingress.config }}
-{{-           if $dot.Values.global.ingress.config.tls }}
-      credentialName: {{ default "ingress-tls-secret" $dot.Values.global.ingress.config.tls.secret }}
-{{-           else }}
-      credentialName: "ingress-tls-secret"
-{{-           end }}
-{{-         else }}
-      credentialName: "ingress-tls-secret"
-{{-         end }}
-      mode: SIMPLE
+    {{ include "istio.config.tls_simple" (dict "dot" $dot ) }}
     hosts:
     - {{ include "ingress.config.host" (dict "dot" $dot "baseaddr" $baseaddr) }}
+{{-         end }}
 {{-       end }}
 {{-     end }}
 {{-   end }}
 {{- end -}}
 
 {{/*
+  Istio Helper function to add the external port of the service
+*/}}
+{{- define "istio.config.port" -}}
+{{-   $dot := default . .dot -}}
+{{-   if .exposedPort }}
+      number: {{ .exposedPort }}
+{{-     if .exposedProtocol }}
+      name: {{ .baseaddr }}
+      protocol: {{ .exposedProtocol }}
+{{-     else }}
+      name: http
+      protocol: HTTP
+{{-     end -}}
+{{-   else }}
+      number: 80
+      name: http
+      protocol: HTTP
+{{-   end -}}
+{{- end -}}
+
+{{/*
   Helper function to add the route to the service
 */}}
 {{- define "ingress.config.port" -}}
@@ -88,7 +130,7 @@
 {{- end -}}
 
 {{/*
-  Helper function to add the route to the service
+  Istio Helper function to add the route to the service
 */}}
 {{- define "istio.config.route" -}}
 {{-   $dot := default . .dot -}}
@@ -196,15 +238,13 @@ metadata:
   name: {{ $baseaddr }}-gateway
 spec:
   selector:
-    istio: ingressgateway # use Istio default gateway implementation
+    istio: ingress # use Istio default gateway implementation
   servers:
   - port:
-      number: 80
-      name: http
-      protocol: HTTP
+      {{- include "istio.config.port" . }}
     hosts:
     - {{ include "ingress.config.host" (dict "dot" $dot "baseaddr" $baseaddr) }}
-    {{ include "ingress.config.tls" (dict "dot" $dot "baseaddr" $baseaddr) }}
+    {{- include "istio.config.tls" (dict "dot" $dot "service" . "baseaddr" $baseaddr) }}
 ---
 apiVersion: networking.istio.io/v1beta1
 kind: VirtualService