YARN-11629. [GPG] Improve GPGOverviewBlock Infomation. (#6341) Contributed by Shilun Fan.

Reviewed-by: Inigo Goiri <inigoiri@apache.org>
Signed-off-by: Shilun Fan <slfan1989@apache.org>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator/src/main/java/org/apache/hadoop/yarn/server/globalpolicygenerator/GlobalPolicyGenerator.java

@@ -377,4 +377,9 @@ public class GlobalPolicyGenerator extends CompositeService {
       System.err.println("Delete Federation policy state store error, exception = " + e);
     }
   }
+
+  @Override
+  public void setConfig(Configuration conf) {
+    super.setConfig(conf);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator/src/main/java/org/apache/hadoop/yarn/server/globalpolicygenerator/webapp/GPGOverviewBlock.java

@@ -18,8 +18,11 @@
 package org.apache.hadoop.yarn.server.globalpolicygenerator.webapp;
 
 import java.util.Date;
+import java.util.concurrent.TimeUnit;
 
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.util.VersionInfo;
+import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.globalpolicygenerator.GlobalPolicyGenerator;
 import org.apache.hadoop.yarn.util.YarnVersionInfo;
 import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
@@ -32,15 +35,51 @@ import com.google.inject.Inject;
  */
 public class GPGOverviewBlock extends HtmlBlock {
 
+  private GlobalPolicyGenerator globalPolicyGenerator;
+
   @Inject
   GPGOverviewBlock(GlobalPolicyGenerator gpg, ViewContext ctx) {
     super(ctx);
+    this.globalPolicyGenerator = gpg;
   }
 
   @Override
   protected void render(Block html) {
+    Configuration config = this.globalPolicyGenerator.getConfig();
+
+    String appCleaner = "disable";
+    long appCleanerIntervalMs = config.getTimeDuration(YarnConfiguration.GPG_APPCLEANER_INTERVAL_MS,
+        YarnConfiguration.DEFAULT_GPG_APPCLEANER_INTERVAL_MS, TimeUnit.MILLISECONDS);
+    if (appCleanerIntervalMs > 0) {
+      appCleaner = "enable, interval : " + appCleanerIntervalMs + " ms";
+    }
+
+    String scCleaner = "disable";
+    long scCleanerIntervalMs = config.getTimeDuration(
+        YarnConfiguration.GPG_SUBCLUSTER_CLEANER_INTERVAL_MS,
+        YarnConfiguration.DEFAULT_GPG_SUBCLUSTER_CLEANER_INTERVAL_MS, TimeUnit.MILLISECONDS);
+    if (scCleanerIntervalMs > 0) {
+      scCleaner = "enable, interval : " + scCleanerIntervalMs + " ms";
+    }
+
+    String pgGenerator = "disable";
+    long policyGeneratorIntervalMillis = config.getTimeDuration(
+        YarnConfiguration.GPG_POLICY_GENERATOR_INTERVAL,
+        YarnConfiguration.DEFAULT_GPG_POLICY_GENERATOR_INTERVAL, TimeUnit.MILLISECONDS);
+
+    if (policyGeneratorIntervalMillis > 0) {
+      pgGenerator = "enable, interval : " + policyGeneratorIntervalMillis + " ms";
+    }
+
+    String policy = config.get(YarnConfiguration.GPG_GLOBAL_POLICY_CLASS,
+        YarnConfiguration.DEFAULT_GPG_GLOBAL_POLICY_CLASS);
+
     info("GPG Details")
         .__("GPG started on", new Date(GlobalPolicyGenerator.getGPGStartupTime()))
+        .__("GPG application cleaner", appCleaner)
+        .__("GPG subcluster cleaner", scCleaner)
+        .__("GPG policy generator", pgGenerator)
+        .__("GPG policy generator class", policy)
         .__("GPG Version", YarnVersionInfo.getVersion())
         .__("Hadoop Version", VersionInfo.getVersion());
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator/src/test/java/org/apache/hadoop/yarn/server/globalpolicygenerator/webapp/TestGPGWebApp.java

@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.yarn.server.globalpolicygenerator.webapp;
 
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.exceptions.YarnException;
 import org.apache.hadoop.yarn.server.globalpolicygenerator.GlobalPolicyGenerator;
 import org.apache.hadoop.yarn.webapp.test.WebAppTests;
@@ -37,4 +38,14 @@ public class TestGPGWebApp {
     WebAppTests.testPage(GPGPoliciesPage.class, GlobalPolicyGenerator.class,
         new GlobalPolicyGenerator());
   }
+
+  @Test
+  public void testGPGOverview()
+      throws InterruptedException, YarnException, IOException {
+    LOG.info("testGPGOverview.");
+    GlobalPolicyGenerator globalPolicyGenerator = new GlobalPolicyGenerator();
+    globalPolicyGenerator.setConfig(new Configuration());
+    WebAppTests.testPage(GPGOverviewPage.class, GlobalPolicyGenerator.class,
+        globalPolicyGenerator);
+  }
 }