HDDS-5. Enable OzoneManager kerberos auth. Contributed by Ajay Kumar.

hadoop-hdds/common/src/main/resources/ozone-default.xml

@@ -1596,7 +1596,23 @@
     <name>ozone.scm.kerberos.principal</name>
     <value></value>
     <tag> OZONE, SECURITY</tag>
-    <description>The SCM service principal. Ex scm/_HOST@REALM.TLD.</description>
+    <description>The SCM service principal. Ex scm/_HOST@REALM.COM</description>
+  </property>
+
+  <property>
+    <name>ozone.om.kerberos.keytab.file</name>
+    <value></value>
+    <tag> OZONE, SECURITY</tag>
+    <description> The keytab file used by KSM daemon to login as its
+      service principal. The principal name is configured with
+      hdds.ksm.kerberos.principal.
+    </description>
+  </property>
+  <property>
+    <name>ozone.om.kerberos.principal</name>
+    <value></value>
+    <tag> OZONE, SECURITY</tag>
+    <description>The KSM service principal. Ex ksm/_HOST@REALM.COM</description>
   </property>
 
   <property>
@@ -1608,4 +1624,18 @@
     <value>/etc/security/keytabs/HTTP.keytab</value>
   </property>
 
+  <property>
+    <name>ozone.om.http.kerberos.principal</name>
+    <value>HTTP/_HOST@EXAMPLE.COM</value>
+    <description>
+      KSM http server kerberos principal.
+    </description>
+  </property>
+  <property>
+    <name>ozone.om.http.kerberos.keytab.file</name>
+    <value>/etc/security/keytabs/HTTP.keytab</value>
+    <description>
+      KSM http server kerberos keytab.
+    </description>
+  </property>
 </configuration>

hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/OMConfigKeys.java

@@ -175,4 +175,13 @@ private OMConfigKeys() {
   public static final TimeDuration
       OZONE_OM_LEADER_ELECTION_MINIMUM_TIMEOUT_DURATION_DEFAULT =
       TimeDuration.valueOf(1, TimeUnit.SECONDS);
+
+  public static final String OZONE_OM_KERBEROS_KEYTAB_FILE_KEY = "ozone.om."
+      + "kerberos.keytab.file";
+  public static final String OZONE_OM_KERBEROS_PRINCIPAL_KEY = "ozone.om"
+      + ".kerberos.principal";
+  public static final String OZONE_OM_WEB_AUTHENTICATION_KERBEROS_KEYTAB_FILE =
+      "ozone.om.http.kerberos.keytab.file";
+  public static final String OZONE_OM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY
+      = "ozone.om.http.kerberos.principal";
 }

hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/protocol/OzoneManagerProtocol.java

@@ -18,6 +18,8 @@
 package org.apache.hadoop.ozone.om.protocol;
 import org.apache.hadoop.ozone.om.helpers.OmMultipartCommitUploadPartInfo;
 import org.apache.hadoop.ozone.om.helpers.OmMultipartInfo;
+
+import org.apache.hadoop.ozone.om.OMConfigKeys;
 import org.apache.hadoop.ozone.om.helpers.OmBucketArgs;
 import org.apache.hadoop.ozone.om.helpers.OmBucketInfo;
 import org.apache.hadoop.ozone.om.helpers.OmKeyArgs;
@@ -28,14 +30,19 @@
 import org.apache.hadoop.ozone.om.helpers.OmVolumeArgs;
 import org.apache.hadoop.ozone.om.helpers.OpenKeySession;
 import org.apache.hadoop.ozone.om.helpers.ServiceInfo;
+
+
 import org.apache.hadoop.ozone.protocol.proto
     .OzoneManagerProtocolProtos.OzoneAclInfo;
 import java.io.IOException;
 import java.util.List;
+import org.apache.hadoop.security.KerberosInfo;
 
 /**
  * Protocol to talk to OM.
  */
+@KerberosInfo(
+    serverPrincipal = OMConfigKeys.OZONE_OM_KERBEROS_PRINCIPAL_KEY)
 public interface OzoneManagerProtocol {
 
   /**

hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/protocolPB/OzoneManagerProtocolPB.java

@@ -18,9 +18,11 @@
 package org.apache.hadoop.ozone.om.protocolPB;
 
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.ozone.om.OMConfigKeys;
 import org.apache.hadoop.ipc.ProtocolInfo;
 import org.apache.hadoop.ozone.protocol.proto
     .OzoneManagerProtocolProtos.OzoneManagerService;
+import org.apache.hadoop.security.KerberosInfo;
 
 /**
  * Protocol used to communicate with OM.
@@ -28,6 +30,8 @@
 @ProtocolInfo(protocolName =
     "org.apache.hadoop.ozone.protocol.OzoneManagerProtocol",
     protocolVersion = 1)
+@KerberosInfo(
+    serverPrincipal = OMConfigKeys.OZONE_OM_KERBEROS_PRINCIPAL_KEY)
 @InterfaceAudience.Private
 public interface OzoneManagerProtocolPB
     extends OzoneManagerService.BlockingInterface {

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/MiniOzoneClusterImpl.java

@@ -469,7 +469,8 @@ private void initializeOmStorage(OMStorage omStorage) throws IOException{
      *
      * @throws IOException
      */
-    private OzoneManager createOM() throws IOException {
+    private OzoneManager createOM()
+        throws IOException, AuthenticationException {
       configureOM();
       OMStorage omStore = new OMStorage(conf);
       initializeOmStorage(omStore);

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestSecureOzoneCluster.java

@@ -22,28 +22,38 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.net.InetAddress;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Properties;
 import java.util.UUID;
+import java.util.concurrent.Callable;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.apache.hadoop.hdds.HddsConfigKeys;
 import org.apache.hadoop.hdds.conf.OzoneConfiguration;
 import org.apache.hadoop.hdds.scm.ScmConfigKeys;
 import org.apache.hadoop.hdds.scm.ScmInfo;
 import org.apache.hadoop.hdds.scm.server.SCMStorage;
 import org.apache.hadoop.hdds.scm.server.StorageContainerManager;
 import org.apache.hadoop.minikdc.MiniKdc;
+import org.apache.hadoop.ozone.om.OMConfigKeys;
+import org.apache.hadoop.ozone.om.OMStorage;
+import org.apache.hadoop.ozone.om.OzoneManager;
 import org.apache.hadoop.security.KerberosAuthException;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.authentication.client.AuthenticationException;
 import org.apache.hadoop.security.authentication.util.KerberosUtil;
 import org.apache.hadoop.test.GenericTestUtils;
+import org.apache.hadoop.test.GenericTestUtils.LogCapturer;
 import org.apache.hadoop.test.LambdaTestUtils;
+import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.Timeout;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -56,13 +66,23 @@ public final class TestSecureOzoneCluster {
   private Logger LOGGER = LoggerFactory
       .getLogger(TestSecureOzoneCluster.class);
 
+  @Rule
+  public Timeout timeout = new Timeout(80000);
+
   private MiniKdc miniKdc;
   private OzoneConfiguration conf;
   private File workDir;
   private static Properties securityProperties;
   private File scmKeytab;
   private File spnegoKeytab;
+  private File omKeyTab;
   private String curUser;
+  private StorageContainerManager scm;
+  private OzoneManager om;
+
+  private static String clusterId;
+  private static String scmId;
+  private static String omId;
 
   @Before
   public void init() {
@@ -71,6 +91,10 @@ public void init() {
       startMiniKdc();
       setSecureConfig(conf);
       createCredentialsInKDC(conf, miniKdc);
+
+      clusterId = UUID.randomUUID().toString();
+      scmId = UUID.randomUUID().toString();
+      omId = UUID.randomUUID().toString();
     } catch (IOException e) {
       LOGGER.error("Failed to initialize TestSecureOzoneCluster", e);
     } catch (Exception e) {
@@ -78,12 +102,31 @@ public void init() {
     }
   }
 
+  @After
+  public void stop() {
+    try {
+      stopMiniKdc();
+      if (scm != null) {
+        scm.stop();
+      }
+      if (om != null) {
+        om.stop();
+      }
+    } catch (Exception e) {
+      LOGGER.error("Failed to stop TestSecureOzoneCluster", e);
+    }
+  }
+
   private void createCredentialsInKDC(Configuration conf, MiniKdc miniKdc)
       throws Exception {
     createPrincipal(scmKeytab,
         conf.get(ScmConfigKeys.OZONE_SCM_KERBEROS_PRINCIPAL_KEY));
     createPrincipal(spnegoKeytab,
-        conf.get(ScmConfigKeys.SCM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY));
+        conf.get(ScmConfigKeys.SCM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY),
+        conf.get(OMConfigKeys.OZONE_OM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY));
+    createPrincipal(omKeyTab,
+        conf.get(OMConfigKeys
+            .OZONE_OM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY));
   }
 
   private void createPrincipal(File keytab, String... principal)
@@ -99,9 +142,13 @@ private void startMiniKdc() throws Exception {
     miniKdc.start();
   }
 
+  private void stopMiniKdc() throws Exception {
+    miniKdc.stop();
+  }
+
   private void setSecureConfig(Configuration conf) throws IOException {
     conf.setBoolean(OZONE_SECURITY_ENABLED_KEY, true);
-    String host = KerberosUtil.getLocalHostName();
+    String host = InetAddress.getLocalHost().getCanonicalHostName();
     String realm = miniKdc.getRealm();
     curUser = UserGroupInformation.getCurrentUser()
         .getUserName();
@@ -114,59 +161,56 @@ private void setSecureConfig(Configuration conf) throws IOException {
     conf.set(ScmConfigKeys.SCM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY,
         "HTTP_SCM/" + host + "@" + realm);
 
+    conf.set(OMConfigKeys.OZONE_OM_KERBEROS_PRINCIPAL_KEY,
+        "om/" + host + "@" + realm);
+    conf.set(OMConfigKeys.OZONE_OM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY,
+        "HTTP_KSM/" + host + "@" + realm);
+
     scmKeytab = new File(workDir, "scm.keytab");
     spnegoKeytab = new File(workDir, "http.keytab");
+    omKeyTab = new File(workDir, "om.keytab");
 
     conf.set(ScmConfigKeys.OZONE_SCM_KERBEROS_KEYTAB_FILE_KEY,
         scmKeytab.getAbsolutePath());
     conf.set(ScmConfigKeys.SCM_WEB_AUTHENTICATION_KERBEROS_KEYTAB_FILE_KEY,
         spnegoKeytab.getAbsolutePath());
+    conf.set(OMConfigKeys.OZONE_OM_KERBEROS_KEYTAB_FILE_KEY,
+        omKeyTab.getAbsolutePath());
 
   }
 
   @Test
   public void testSecureScmStartupSuccess() throws Exception {
-    final String path = GenericTestUtils
+
-        .getTempPath(UUID.randomUUID().toString());
+    initSCM();
-    Path scmPath = Paths.get(path, "scm-meta");
+    scm = StorageContainerManager.createSCM(null, conf);
-    conf.set(OzoneConfigKeys.OZONE_METADATA_DIRS, scmPath.toString());
-    conf.setBoolean(OzoneConfigKeys.OZONE_ENABLED, true);
-    SCMStorage scmStore = new SCMStorage(conf);
-    String clusterId = UUID.randomUUID().toString();
-    String scmId = UUID.randomUUID().toString();
-    scmStore.setClusterId(clusterId);
-    scmStore.setScmId(scmId);
-    // writes the version file properties
-    scmStore.initialize();
-    StorageContainerManager scm = StorageContainerManager.createSCM(null, conf);
     //Reads the SCM Info from SCM instance
     ScmInfo scmInfo = scm.getClientProtocolServer().getScmInfo();
     Assert.assertEquals(clusterId, scmInfo.getClusterId());
     Assert.assertEquals(scmId, scmInfo.getScmId());
   }
 
-  @Test
+  private void initSCM()
-  public void testSecureScmStartupFailure() throws Exception {
+      throws IOException, AuthenticationException {
     final String path = GenericTestUtils
         .getTempPath(UUID.randomUUID().toString());
     Path scmPath = Paths.get(path, "scm-meta");
-
+    conf.set(HddsConfigKeys.OZONE_METADATA_DIRS, scmPath.toString());
-    OzoneConfiguration conf = new OzoneConfiguration();
-    conf.setBoolean(OZONE_SECURITY_ENABLED_KEY, true);
-    conf.set(OzoneConfigKeys.OZONE_METADATA_DIRS, scmPath.toString());
     conf.setBoolean(OzoneConfigKeys.OZONE_ENABLED, true);
-    conf.set(ScmConfigKeys.OZONE_SCM_KERBEROS_PRINCIPAL_KEY,
-        "scm@" + miniKdc.getRealm());
-    conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
-        "kerberos");
-
     SCMStorage scmStore = new SCMStorage(conf);
-    String clusterId = UUID.randomUUID().toString();
-    String scmId = UUID.randomUUID().toString();
     scmStore.setClusterId(clusterId);
     scmStore.setScmId(scmId);
     // writes the version file properties
     scmStore.initialize();
+  }
+
+  @Test
+  public void testSecureScmStartupFailure() throws Exception {
+    initSCM();
+    conf.set(ScmConfigKeys.OZONE_SCM_KERBEROS_KEYTAB_FILE_KEY, "");
+    conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
+        "kerberos");
+
     LambdaTestUtils.intercept(IOException.class,
         "Running in secure mode, but config doesn't have a keytab",
         () -> {
@@ -178,28 +222,82 @@ public void testSecureScmStartupFailure() throws Exception {
     conf.set(ScmConfigKeys.OZONE_SCM_KERBEROS_KEYTAB_FILE_KEY,
         "/etc/security/keytabs/scm.keytab");
 
+    testCommonKerberosFailures(
+        () -> StorageContainerManager.createSCM(null, conf));
+
+  }
+
+  private void testCommonKerberosFailures(Callable callable) throws Exception {
     LambdaTestUtils.intercept(KerberosAuthException.class, "failure "
-            + "to login: for principal:",
+        + "to login: for principal:", callable);
-        () -> {
-          StorageContainerManager.createSCM(null, conf);
-        });
     conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
         "OAuth2");
 
     LambdaTestUtils.intercept(IllegalArgumentException.class, "Invalid"
             + " attribute value for hadoop.security.authentication of OAuth2",
-        () -> {
+        callable);
-          StorageContainerManager.createSCM(null, conf);
-        });
 
     conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
         "KERBEROS_SSL");
     LambdaTestUtils.intercept(AuthenticationException.class,
-        "KERBEROS_SSL authentication method not support.",
+        "KERBEROS_SSL authentication method not",
-        () -> {
+        callable);
-          StorageContainerManager.createSCM(null, conf);
+  }
-        });
 
+  /**
+   * Tests the secure KSM Initialization Failure.
+   *
+   * @throws IOException
+   */
+  @Test
+  public void testSecureKsmInitializationFailure() throws Exception {
+    initSCM();
+    // Create a secure SCM instance as om client will connect to it
+    scm = StorageContainerManager.createSCM(null, conf);
+
+    final String path = GenericTestUtils
+        .getTempPath(UUID.randomUUID().toString());
+    OMStorage ksmStore = new OMStorage(conf);
+    ksmStore.setClusterId("testClusterId");
+    ksmStore.setScmId("testScmId");
+    // writes the version file properties
+    ksmStore.initialize();
+    conf.set(OMConfigKeys.OZONE_OM_KERBEROS_PRINCIPAL_KEY,
+        "non-existent-user@EXAMPLE.com");
+    testCommonKerberosFailures(() -> OzoneManager.createOm(null, conf));
+  }
+
+  /**
+   * Tests the secure KSM Initialization success.
+   *
+   * @throws IOException
+   */
+  @Test
+  public void testSecureKsmInitializationSuccess() throws Exception {
+    initSCM();
+    // Create a secure SCM instance as om client will connect to it
+    scm = StorageContainerManager.createSCM(null, conf);
+    LogCapturer logs = LogCapturer.captureLogs(OzoneManager.LOG);
+    GenericTestUtils
+        .setLogLevel(LoggerFactory.getLogger(OzoneManager.class.getName()),
+            org.slf4j.event.Level.INFO);
+
+    final String path = GenericTestUtils
+        .getTempPath(UUID.randomUUID().toString());
+    Path metaDirPath = Paths.get(path, "om-meta");
+
+    OMStorage omStore = new OMStorage(conf);
+    omStore.setClusterId("testClusterId");
+    omStore.setScmId("testScmId");
+    // writes the version file properties
+    omStore.initialize();
+    try {
+      om = OzoneManager.createOm(null, conf);
+    } catch (Exception ex) {
+      // Expects timeout failure from scmClient in KSM but KSM user login via
+      // kerberos should succeed
+      Assert.assertTrue(logs.getOutput().contains("KSM login successful"));
+    }
   }
 
 }

hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java

@@ -53,6 +53,7 @@
 import org.apache.hadoop.ozone.audit.AuditMessage;
 import org.apache.hadoop.ozone.audit.Auditor;
 import org.apache.hadoop.ozone.audit.OMAction;
+import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.common.Storage.StorageState;
 import org.apache.hadoop.ozone.om.exceptions.OMException;
 import org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes;
@@ -86,7 +87,10 @@
 import org.apache.hadoop.ozone.security.acl.OzoneObj.ResourceType;
 import org.apache.hadoop.ozone.security.acl.OzoneObjInfo;
 import org.apache.hadoop.ozone.security.acl.RequestContext;
+import org.apache.hadoop.security.SecurityUtil;
 import org.apache.hadoop.security.UserGroupInformation;
+import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
+import org.apache.hadoop.security.authentication.client.AuthenticationException;
 import org.apache.hadoop.util.GenericOptionsParser;
 import org.apache.hadoop.util.JvmPauseMonitor;
 import org.apache.hadoop.util.ReflectionUtils;
@@ -97,6 +101,7 @@
 import org.slf4j.LoggerFactory;
 
 import javax.management.ObjectName;
+import javax.ws.rs.HEAD;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileOutputStream;
@@ -140,6 +145,11 @@
 import static org.apache.hadoop.ozone.protocol.proto
     .OzoneManagerProtocolProtos.OzoneManagerService
     .newReflectiveBlockingService;
+import static org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OzoneManagerService.newReflectiveBlockingService;
+import static org.apache.hadoop.ozone.om.OMConfigKeys
+    .OZONE_OM_KERBEROS_KEYTAB_FILE_KEY;
+import static org.apache.hadoop.ozone.om.OMConfigKeys
+    .OZONE_OM_KERBEROS_PRINCIPAL_KEY;
 import static org.apache.hadoop.util.ExitUtil.terminate;
 
 /**
@@ -148,7 +158,7 @@
 @InterfaceAudience.LimitedPrivate({"HDFS", "CBLOCK", "OZONE", "HBASE"})
 public final class OzoneManager extends ServiceRuntimeInfoImpl
     implements OzoneManagerProtocol, OMMXBean, Auditor {
-  private static final Logger LOG =
+  public static final Logger LOG =
       LoggerFactory.getLogger(OzoneManager.class);
 
   private static final AuditLogger AUDIT =
@@ -193,14 +203,16 @@ private OzoneManager(OzoneConfiguration conf) throws IOException {
     configuration = conf;
     omStorage = new OMStorage(conf);
     omId = omStorage.getOmId();
-    scmBlockClient = getScmBlockClient(configuration);
-    scmContainerClient = getScmContainerClient(configuration);
     if (omStorage.getState() != StorageState.INITIALIZED) {
       throw new OMException("OM not initialized.",
           ResultCodes.OM_NOT_INITIALIZED);
     }
 
+    scmContainerClient = getScmContainerClient(configuration);
+
     // verifies that the SCM info in the OM Version file is correct.
+    scmBlockClient = getScmBlockClient(configuration);
+
     ScmInfo scmInfo = scmBlockClient.getScmInfo();
     if (!(scmInfo.getClusterId().equals(omStorage.getClusterID()) && scmInfo
         .getScmId().equals(omStorage.getScmId()))) {
@@ -301,6 +313,35 @@ private File getMetricsStorageFile() {
   }
 
 
+  /**
+   * Login KSM service user if security and Kerberos are enabled.
+   *
+   * @param  conf
+   * @throws IOException, AuthenticationException
+   */
+  private static void loginKSMUser(OzoneConfiguration conf)
+      throws IOException, AuthenticationException {
+
+    if (SecurityUtil.getAuthenticationMethod(conf).equals
+        (AuthenticationMethod.KERBEROS)) {
+      LOG.debug("Ozone security is enabled. Attempting login for KSM user. "
+              + "Principal: {},keytab: {}", conf.get
+              (OZONE_OM_KERBEROS_PRINCIPAL_KEY),
+          conf.get(OZONE_OM_KERBEROS_KEYTAB_FILE_KEY));
+
+      UserGroupInformation.setConfiguration(conf);
+
+      InetSocketAddress socAddr = getOmAddress(conf);
+      SecurityUtil.login(conf, OZONE_OM_KERBEROS_KEYTAB_FILE_KEY,
+          OZONE_OM_KERBEROS_PRINCIPAL_KEY, socAddr.getHostName());
+    } else {
+      throw new AuthenticationException(SecurityUtil.getAuthenticationMethod
+          (conf) + " authentication method not supported. KSM user login "
+          + "failed.");
+    }
+    LOG.info("KSM login successful.");
+  }
+
   /**
    * Create a scm block client, used by putKey() and getKey().
    *
@@ -418,15 +459,16 @@ private static void printUsage(PrintStream out) {
    * @param argv Command line arguments
    * @param conf OzoneConfiguration
    * @return OM instance
-   * @throws IOException in case OM instance creation fails.
+   * @throws IOException, AuthenticationException in case OM instance
+   *   creation fails.
    */
   @VisibleForTesting
   public static OzoneManager createOm(
-      String[] argv, OzoneConfiguration conf) throws IOException {
+      String[] argv, OzoneConfiguration conf)
+      throws IOException, AuthenticationException {
     return createOm(argv, conf, false);
   }
 
-
   /**
    * Constructs OM instance based on command line arguments.
    *
@@ -434,10 +476,12 @@ public static OzoneManager createOm(
    * @param conf OzoneConfiguration
    * @param printBanner if true then log a verbose startup message.
    * @return OM instance
-   * @throws IOException in case OM instance creation fails.
+   * @throws IOException, AuthenticationException in case OM instance
+   *   creation fails.
    */
   private static OzoneManager createOm(String[] argv,
-      OzoneConfiguration conf, boolean printBanner) throws IOException {
+      OzoneConfiguration conf, boolean printBanner)
+      throws IOException, AuthenticationException {
     if (!isHddsEnabled(conf)) {
       System.err.println("OM cannot be started in secure mode or when " +
           OZONE_ENABLED + " is set to false");
@@ -449,6 +493,10 @@ private static OzoneManager createOm(String[] argv,
       terminate(1);
       return null;
     }
+    // Authenticate KSM if security is enabled
+    if (conf.getBoolean(OzoneConfigKeys.OZONE_SECURITY_ENABLED_KEY, true)) {
+      loginKSMUser(conf);
+    }
     switch (startOpt) {
     case INIT:
       if (printBanner) {
@@ -654,7 +702,12 @@ public void start() throws IOException {
     keyManager.start(configuration);
 
     httpServer = new OzoneManagerHttpServer(configuration, this);
-    httpServer.start();
+    try {
+      httpServer.start();
+    } catch (Exception ex) {
+      // Allow OM to start as Http Server failure is not fatal.
+      LOG.error("OM HttpServer failed to start.", ex);
+    }
     registerMXBean();
 
     // Start jvm monitor

hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManagerHttpServer.java

@@ -18,7 +18,6 @@
 package org.apache.hadoop.ozone.om;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConsts;
 import org.apache.hadoop.hdds.server.BaseHttpServer;
 
@@ -65,11 +64,11 @@ public OzoneManagerHttpServer(Configuration conf, OzoneManager om)
   }
 
   @Override protected String getKeytabFile() {
-    return OMConfigKeys.OZONE_OM_KEYTAB_FILE;
+    return OMConfigKeys.OZONE_OM_WEB_AUTHENTICATION_KERBEROS_KEYTAB_FILE;
   }
 
   @Override protected String getSpnegoPrincipal() {
-    return OzoneConfigKeys.OZONE_SCM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL;
+    return OMConfigKeys.OZONE_OM_WEB_AUTHENTICATION_KERBEROS_PRINCIPAL_KEY;
   }
 
   @Override protected String getEnabledKey() {