example external custom alertmanager template

examples/alertmanager-config-template-external.jsonnet

@@ -0,0 +1,28 @@
+local configmap(name, namespace, data) = {
+    apiVersion: "v1",
+    kind: "ConfigMap",
+    metadate : {
+        name: name,
+        namespace: namespace,
+    },
+    data: data,
+ };
+
+local kp = 
+    // different libsonnet imported
+  {
+      configmap+:: {
+          'alert-templates': configmap(
+          'alertmanager-alert-template.tmpl',
+          $._config.namespace, 
+          {"data": importstr 'alertmanager-alert-template.tmpl'},
+          )
+      },
+      alertmanager+:{
+            spec+:{
+                # the important field configmaps:
+                configMaps: ['alert-templates',], # goes to etc/alermanager/configmaps
+            },
+      },
+};
+{ [name + '-configmap']: kp.configmap[name] for name in std.objectFields(kp.configmap) }