helm: Use templates in NOTES.txt for better advice.

This logic is should give the correct Zulip URL in a wider range of 
configurations.

Author: mikkeschiren

kubernetes/chart/zulip/templates/NOTES.txt

@@ -5,4 +5,23 @@
 
 2. Zulip will be available on:
 
-  https://{{ .host }}
+
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "zulip.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+      NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+            You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "zulip.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "zulip.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  echo "Visit http://127.0.0.1:{{ .Values.service.port }} to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward svc/{{ .Release.Name }}-http {{ .Values.service.port }}:{{ .Values.service.port }}
+{{- end }}