freshness63

Author: dagiro

articles/hdinsight/hdinsight-apps-use-edge-node.md

@@ -7,43 +7,45 @@ ms.reviewer: jasonh
 ms.service: hdinsight
 ms.topic: conceptual
 ms.custom: hdinsightactive,hdiseo17may2017
-ms.date: 01/27/2020
+ms.date: 04/16/2020
 ---
 
 # Use empty edge nodes on Apache Hadoop clusters in HDInsight
 
-Learn how to add an empty edge node to an HDInsight cluster. An empty edge node is a Linux virtual machine with the same client tools installed and configured as in the headnodes, but with no [Apache Hadoop](https://hadoop.apache.org/) services running. You can use the edge node for accessing the cluster, testing your client applications, and hosting your client applications.
+Learn how to add an empty edge node to an HDInsight cluster. An empty edge node is a Linux virtual machine with the same client tools installed and configured as in the headnodes, but with no [Apache Hadoop](./hadoop/apache-hadoop-introduction.md) services running. You can use the edge node for accessing the cluster, testing your client applications, and hosting your client applications.
 
 You can add an empty edge node to an existing HDInsight cluster, to a new cluster when you create the cluster. Adding an empty edge node is done using Azure Resource Manager template.  The following sample demonstrates how it's done using a template:
 
-    "resources": [
-        {
-            "name": "[concat(parameters('clusterName'),'/', variables('applicationName'))]",
-            "type": "Microsoft.HDInsight/clusters/applications",
-            "apiVersion": "2015-03-01-preview",
-            "dependsOn": [ "[concat('Microsoft.HDInsight/clusters/',parameters('clusterName'))]" ],
-            "properties": {
-                "marketPlaceIdentifier": "EmptyNode",
-                "computeProfile": {
-                    "roles": [{
-                        "name": "edgenode",
-                        "targetInstanceCount": 1,
-                        "hardwareProfile": {
-                            "vmSize": "{}"
-                        }
-                    }]
-                },
-                "installScriptActions": [{
-                    "name": "[concat('emptynode','-' ,uniquestring(variables('applicationName')))]",
-                    "uri": "[parameters('installScriptAction')]",
-                    "roles": ["edgenode"]
-                }],
-                "uninstallScriptActions": [],
-                "httpsEndpoints": [],
-                "applicationType": "CustomApplication"
-            }
+```json
+"resources": [
+    {
+        "name": "[concat(parameters('clusterName'),'/', variables('applicationName'))]",
+        "type": "Microsoft.HDInsight/clusters/applications",
+        "apiVersion": "2015-03-01-preview",
+        "dependsOn": [ "[concat('Microsoft.HDInsight/clusters/',parameters('clusterName'))]" ],
+        "properties": {
+            "marketPlaceIdentifier": "EmptyNode",
+            "computeProfile": {
+                "roles": [{
+                    "name": "edgenode",
+                    "targetInstanceCount": 1,
+                    "hardwareProfile": {
+                        "vmSize": "{}"
+                    }
+                }]
+            },
+            "installScriptActions": [{
+                "name": "[concat('emptynode','-' ,uniquestring(variables('applicationName')))]",
+                "uri": "[parameters('installScriptAction')]",
+                "roles": ["edgenode"]
+            }],
+            "uninstallScriptActions": [],
+            "httpsEndpoints": [],
+            "applicationType": "CustomApplication"
         }
-    ],
+    }
+],
+```
 
 As shown in the sample, you can optionally call a [script action](hdinsight-hadoop-customize-cluster-linux.md) to perform additional configuration, such as installing [Apache Hue](hdinsight-hadoop-hue-linux.md) in the edge node. The script action script must be publicly accessible on the web.  For example, if the script is stored in Azure Storage, use either public containers or public blobs.