HADOOP-8343. Allow configuration of authorization for JmxJsonServlet and MetricsServlet (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1333750 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -163,6 +163,9 @@ Release 2.0.0 - UNRELEASED
     HADOOP-8210. Common side of HDFS-3148: The client should be able
     to use multiple local interfaces for data transfer. (eli)
 
+    HADOOP-8343. Allow configuration of authorization for JmxJsonServlet and 
+    MetricsServlet (tucu)
+
   IMPROVEMENTS
 
     HADOOP-7524. Change RPC to allow multiple protocols including multuple

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/ConfServlet.java

@@ -18,7 +18,6 @@
 package org.apache.hadoop.conf;
 
 import java.io.IOException;
-import java.io.OutputStreamWriter;
 import java.io.Writer;
 
 import javax.servlet.ServletException;
@@ -57,9 +56,8 @@ public class ConfServlet extends HttpServlet {
   public void doGet(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
 
-    // Do the authorization
-    if (!HttpServer.hasAdministratorAccess(getServletContext(), request,
-        response)) {
+    if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(),
+                                                   request, response)) {
       return;
     }
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeysPublic.java

@@ -228,6 +228,9 @@ public class CommonConfigurationKeysPublic {
   public static final String HADOOP_SECURITY_AUTHORIZATION =
     "hadoop.security.authorization";
   /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
+  public static final String HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN =
+    "hadoop.security.instrumentation.requires.admin";
+  /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
   public static final String  HADOOP_SECURITY_SERVICE_USER_NAME_KEY =
     "hadoop.security.service.user.name.key";
 }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer.java

@@ -779,6 +779,37 @@ public class HttpServer implements FilterContainer {
         : "Inactive HttpServer";
   }
 
+  /**
+   * Checks the user has privileges to access to instrumentation servlets.
+   * <p/>
+   * If <code>hadoop.security.instrumentation.requires.admin</code> is set to FALSE
+   * (default value) it always returns TRUE.
+   * <p/>
+   * If <code>hadoop.security.instrumentation.requires.admin</code> is set to TRUE
+   * it will check that if the current user is in the admin ACLS. If the user is
+   * in the admin ACLs it returns TRUE, otherwise it returns FALSE.
+   *
+   * @param servletContext the servlet context.
+   * @param request the servlet request.
+   * @param response the servlet response.
+   * @return TRUE/FALSE based on the logic decribed above.
+   */
+  public static boolean isInstrumentationAccessAllowed(
+    ServletContext servletContext, HttpServletRequest request,
+    HttpServletResponse response) throws IOException {
+    Configuration conf =
+      (Configuration) servletContext.getAttribute(CONF_CONTEXT_ATTRIBUTE);
+
+    boolean access = true;
+    boolean adminAccess = conf.getBoolean(
+      CommonConfigurationKeys.HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN,
+      false);
+    if (adminAccess) {
+      access = hasAdministratorAccess(servletContext, request, response);
+    }
+    return access;
+  }
+
   /**
    * Does the user sending the HttpServletRequest has the administrator ACLs? If
    * it isn't the case, response will be modified to send an error to the user.
@@ -794,7 +825,6 @@ public class HttpServer implements FilterContainer {
       HttpServletResponse response) throws IOException {
     Configuration conf =
         (Configuration) servletContext.getAttribute(CONF_CONTEXT_ATTRIBUTE);
-
     // If there is no authorization, anybody has administrator access.
     if (!conf.getBoolean(
         CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
@@ -834,12 +864,11 @@ public class HttpServer implements FilterContainer {
     @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
-      response.setContentType("text/plain; charset=UTF-8");
-      // Do the authorization
-      if (!HttpServer.hasAdministratorAccess(getServletContext(), request,
-          response)) {
+      if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(),
+                                                     request, response)) {
         return;
       }
+      response.setContentType("text/plain; charset=UTF-8");
       PrintWriter out = response.getWriter();
       ReflectionUtils.printThreadInfo(out, "");
       out.close();

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/JMXJsonServlet.java

@@ -148,9 +148,8 @@ public class JMXJsonServlet extends HttpServlet {
   @Override
   public void doGet(HttpServletRequest request, HttpServletResponse response) {
     try {
-      // Do the authorization
-      if (!HttpServer.hasAdministratorAccess(getServletContext(), request,
-          response)) {
+      if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(),
+                                                     request, response)) {
         return;
       }
       JsonGenerator jg = null;

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsServlet.java

@@ -106,9 +106,8 @@ public class MetricsServlet extends HttpServlet {
   public void doGet(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
 
-    // Do the authorization
-    if (!HttpServer.hasAdministratorAccess(getServletContext(), request,
-        response)) {
+    if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(),
+                                                   request, response)) {
       return;
     }
 

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

@@ -62,6 +62,15 @@
   <description>Is service-level authorization enabled?</description>
 </property>
 
+<property>
+  <name>hadoop.security.instrumentation.requires.admin</name>
+  <value>false</value>
+  <description>
+    Indicates if administrator ACLs are required to access
+    instrumentation servlets (JMX, METRICS, CONF, STACKS).
+  </description>
+</property>
+
 <property>
   <name>hadoop.security.authentication</name>
   <value>simple</value>

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/http/HttpServerFunctionalTest.java

@@ -19,6 +19,7 @@
 
 package org.apache.hadoop.http;
 
+import org.apache.hadoop.security.authorize.AccessControlList;
 import org.junit.Assert;
 import org.apache.hadoop.conf.Configuration;
 
@@ -70,6 +71,12 @@ public class HttpServerFunctionalTest extends Assert {
     return createServer(TEST, conf);
   }
 
+  public static HttpServer createTestServer(Configuration conf, AccessControlList adminsAcl)
+      throws IOException {
+    prepareTestWebapp();
+    return createServer(TEST, conf, adminsAcl);
+  }
+
   /**
    * Create but do not start the test webapp server. The test webapp dir is
    * prepared/checked in advance.
@@ -132,6 +139,11 @@ public class HttpServerFunctionalTest extends Assert {
       throws IOException {
     return new HttpServer(webapp, "0.0.0.0", 0, true, conf);
   }
+
+  public static HttpServer createServer(String webapp, Configuration conf, AccessControlList adminsAcl)
+      throws IOException {
+    return new HttpServer(webapp, "0.0.0.0", 0, true, conf, adminsAcl);
+  }
   /**
    * Create an HttpServer instance for the given webapp
    * @param webapp the webapp to work with

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/http/TestHttpServer.java

@@ -60,7 +60,6 @@ import org.apache.hadoop.security.authorize.AccessControlList;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
-import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mortbay.util.ajax.JSON;
 
@@ -360,6 +359,8 @@ public class TestHttpServer extends HttpServerFunctionalTest {
     Configuration conf = new Configuration();
     conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION,
         true);
+    conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN,
+        true);
     conf.set(HttpServer.FILTER_INITIALIZER_PROPERTY,
         DummyFilterInitializer.class.getName());
 
@@ -468,6 +469,26 @@ public class TestHttpServer extends HttpServerFunctionalTest {
 
   }
 
+  @Test
+  public void testRequiresAuthorizationAccess() throws Exception {
+    Configuration conf = new Configuration();
+    ServletContext context = Mockito.mock(ServletContext.class);
+    Mockito.when(context.getAttribute(HttpServer.CONF_CONTEXT_ATTRIBUTE)).thenReturn(conf);
+    HttpServletRequest request = Mockito.mock(HttpServletRequest.class);
+    HttpServletResponse response = Mockito.mock(HttpServletResponse.class);
+
+    //requires admin access to instrumentation, FALSE by default
+    Assert.assertTrue(HttpServer.isInstrumentationAccessAllowed(context, request, response));
+
+    //requires admin access to instrumentation, TRUE
+    conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN, true);
+    conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, true);
+    AccessControlList acls = Mockito.mock(AccessControlList.class);
+    Mockito.when(acls.isUserAllowed(Mockito.<UserGroupInformation>any())).thenReturn(false);
+    Mockito.when(context.getAttribute(HttpServer.ADMINS_ACL)).thenReturn(acls);
+    Assert.assertFalse(HttpServer.isInstrumentationAccessAllowed(context, request, response));
+  }
+
   @Test public void testBindAddress() throws Exception {
     checkBindAddress("0.0.0.0", 0, false).stop();
     // hang onto this one for a bit more testing