AMBARI-19002 Ambari widgets and service checks to honor LLAP clusters with 100% allocation to LLAP daemons. (atkach)

ambari-server/src/main/resources/stacks/HDP/2.0.6/configuration/cluster-env.xml

@@ -274,4 +274,10 @@ gpgcheck=0</value>
     <description>For properties handled by handle_mounted_dirs this will make Ambari </description>
     <on-ambari-upgrade add="true"/>
   </property>
+  <property>
+    <name>hide_yarn_memory_widget</name>
+    <value>false</value>
+    <description>YARN Memory widget should be hidden by default on the dashboard.</description>
+    <on-ambari-upgrade add="true"/>
+  </property>
 </configuration>

ambari-web/app/views/main/dashboard/widgets.js

@@ -116,6 +116,16 @@ App.MainDashboardWidgetsView = Em.View.extend(App.UserPref, App.LocalStorage, Ap
     }, this);
   },
 
+  resolveConfigDependencies: function(visibleFull, hiddenFull) {
+    var clusterEnv = App.router.get('clusterController.clusterEnv').properties;
+
+    if (clusterEnv['hide_yarn_memory_widget'] === 'true') {
+      hiddenFull.push(['20', 'YARN Memory']);
+    } else {
+      visibleFull.splice(visibleFull.indexOf('19'), 0, '20');
+    }
+  },
+
   /**
    * Load widget statuses to <code>initPrefObject</code>
    */
@@ -126,7 +136,7 @@ App.MainDashboardWidgetsView = Em.View.extend(App.UserPref, App.LocalStorage, Ap
       '6', '7', '8', '9', //host metrics
       '1', '5', '3', '10', //hdfs
       '13', '12', '14', '16', //hbase
-      '17', '18', '19', '20', '23', // all yarn
+      '17', '18', '19', '23', // all yarn
       '21', // storm
       '22', // flume
       '24', // hawq
@@ -135,6 +145,7 @@ App.MainDashboardWidgetsView = Em.View.extend(App.UserPref, App.LocalStorage, Ap
     var hiddenFull = [
       ['15', 'Region In Transition']
     ];
+    this.resolveConfigDependencies(visibleFull, hiddenFull);
 
     // Display widgets for host metrics if the stack definition has a host metrics service to display it.
     if (this.get('host_metrics_model') == null) {
@@ -155,7 +166,9 @@ App.MainDashboardWidgetsView = Em.View.extend(App.UserPref, App.LocalStorage, Ap
       hbase.forEach(function (item) {
         visibleFull = visibleFull.without(item);
       }, this);
-      hiddenFull = [];
+      hiddenFull = hiddenFull.filter(function(item) {
+        return item[0] !== '15';
+      });
     }
     if (this.get('yarn_model') == null) {
       var yarn = ['17', '18', '19', '20', '23'];

ambari-web/test/views/main/dashboard/widgets_test.js

@@ -107,12 +107,21 @@ describe('App.MainDashboardWidgetsView', function () {
           yarn_model: {}
         },
         e: {
-          visibleL: totalWidgetsCount,
+          visibleL: totalWidgetsCount - 1,
           hiddenL: 1
         },
         m: 'All models are not null'
       }
     ]);
+
+    beforeEach(function() {
+      sinon.stub(view, 'resolveConfigDependencies');
+    });
+
+    afterEach(function() {
+      view.resolveConfigDependencies.restore();
+    });
+
     tests.forEach(function (test) {
       describe(test.m, function () {