YARN-10039. Allow disabling app submission from REST endpoints

(cherry picked from commit 406c35dd1213ef354570f8337e54a4fb4bbf5bad)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java

@@ -3367,6 +3367,10 @@ public class YarnConfiguration extends Configuration {
       RM_PREFIX + "display.per-user-apps";
   public static final boolean DEFAULT_DISPLAY_APPS_FOR_LOGGED_IN_USER = false;
 
+  public static final String ENABLE_REST_APP_SUBMISSIONS =
+      "yarn.webapp.enable-rest-app-submissions";
+  public static final boolean DEFAULT_ENABLE_REST_APP_SUBMISSIONS = true;
+
   // RM and NM CSRF props
   public static final String REST_CSRF = "webapp.rest-csrf.";
   public static final String RM_CSRF_PREFIX = RM_PREFIX + REST_CSRF;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml

@@ -3590,4 +3590,10 @@
     <name>yarn.workflow-id.tag-prefix</name>
     <value>workflowid:</value>
   </property>
+
+  <property>
+    <description>Whether or not to allow application submissions via REST. Default is true.</description>
+    <name>yarn.webapp.enable-rest-app-submissions</name>
+    <value>true</value>
+  </property>
 </configuration>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMWebServices.java

@@ -230,6 +230,7 @@ public class RMWebServices extends WebServices implements RMWebServiceProtocol {
   @VisibleForTesting
   boolean isCentralizedNodeLabelConfiguration = true;
   private boolean displayPerUserApps = false;
+  private boolean enableRestAppSubmissions = true;
 
   public final static String DELEGATION_TOKEN_HEADER =
       "Hadoop-YARN-RM-Delegation-Token";
@@ -245,6 +246,9 @@ public class RMWebServices extends WebServices implements RMWebServiceProtocol {
     this.displayPerUserApps  = conf.getBoolean(
         YarnConfiguration.DISPLAY_APPS_FOR_LOGGED_IN_USER,
         YarnConfiguration.DEFAULT_DISPLAY_APPS_FOR_LOGGED_IN_USER);
+    this.enableRestAppSubmissions = conf.getBoolean(
+        YarnConfiguration.ENABLE_REST_APP_SUBMISSIONS,
+        YarnConfiguration.DEFAULT_ENABLE_REST_APP_SUBMISSIONS);
   }
 
   RMWebServices(ResourceManager rm, Configuration conf,
@@ -1535,6 +1539,10 @@ public class RMWebServices extends WebServices implements RMWebServiceProtocol {
   @Override
   public Response createNewApplication(@Context HttpServletRequest hsr)
       throws AuthorizationException, IOException, InterruptedException {
+    if (!enableRestAppSubmissions) {
+      String msg = "App submission via REST is disabled.";
+      return Response.status(Status.FORBIDDEN).entity(msg).build();
+    }
     UserGroupInformation callerUGI = getCallerUserGroupInformation(hsr, true);
     initForWritableEndpoints(callerUGI, false);
 
@@ -1554,6 +1562,10 @@ public class RMWebServices extends WebServices implements RMWebServiceProtocol {
   public Response submitApplication(ApplicationSubmissionContextInfo newApp,
       @Context HttpServletRequest hsr)
       throws AuthorizationException, IOException, InterruptedException {
+    if (!enableRestAppSubmissions) {
+      String msg = "App submission via REST is disabled.";
+      return Response.status(Status.FORBIDDEN).entity(msg).build();
+    }
 
     UserGroupInformation callerUGI = getCallerUserGroupInformation(hsr, true);
     initForWritableEndpoints(callerUGI, false);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServices.java

@@ -35,6 +35,7 @@ import java.util.Set;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 
@@ -61,6 +62,7 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ApplicationSubmissionContextInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppsInfo;
 import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
 import org.apache.hadoop.yarn.util.AdHocLogDumper;
@@ -748,4 +750,22 @@ public class TestRMWebServices extends JerseyTestBase {
     when(mockHsr.getUserPrincipal()).thenReturn(principal);
     return mockHsr;
   }
+
+  @Test
+  public void testDisableRestAppSubmission() throws Exception {
+    Configuration conf = new YarnConfiguration();
+    conf.setBoolean(YarnConfiguration.ENABLE_REST_APP_SUBMISSIONS, false);
+    RMWebServices webSvc = new RMWebServices(mock(ResourceManager.class), conf,
+        mock(HttpServletResponse.class));
+    HttpServletRequest request = mock(HttpServletRequest.class);
+
+    Response response = webSvc.createNewApplication(request);
+    assertEquals(Status.FORBIDDEN.getStatusCode(), response.getStatus());
+    assertEquals("App submission via REST is disabled.", response.getEntity());
+
+    response = webSvc.submitApplication(
+        mock(ApplicationSubmissionContextInfo.class), request);
+    assertEquals(Status.FORBIDDEN.getStatusCode(), response.getStatus());
+    assertEquals("App submission via REST is disabled.", response.getEntity());
+  }
 }