[KYUUBI #6199] Support to run HiveSQLEngine on kerberized YARN

# 🔍 Description ## Issue References 🔗 This pull request implement a feature - Run HiveSQLEngine on kerberized YARN ## Describe Your Solution 🔧 Introduced two configs: - kyuubi.engine.principal - kyuubi.engine.keytab When do submit to a kerberized YARN, submitter uploads `kyuubi.engine.keytab` to application's staging dir. YARN NodeManager downloads keytab to AM's working directory. AM logins to Kerberos using the principal and keytab **Note** I've tried to run HiveSQLEngine with only DelegationTokens but failed. Take SQL `SELECT * FROM a` as an example: Hive handles this simple TableScan SQL by reading directly from table's hdfs file. When Hive invokes `FileInputFormat.getSplits` during reading, `java.io.IOException: Delegation Token can be issued only with kerberos or web authentication` will be thrown. The simplified stacktrace from IDEA is as below: ``` getDelegationToken:734, DFSClient (org.apache.hadoop.hdfs) getDelegationToken:2072, DistributedFileSystem (org.apache.hadoop.hdfs) collectDelegationTokens:108, DelegationTokenIssuer (org.apache.hadoop.security.token) addDelegationTokens:83, DelegationTokenIssuer (org.apache.hadoop.security.token) obtainTokensForNamenodesInternal:143, TokenCache (org.apache.hadoop.mapreduce.security) obtainTokensForNamenodesInternal:102, TokenCache (org.apache.hadoop.mapreduce.security) obtainTokensForNamenodes:81, TokenCache (org.apache.hadoop.mapreduce.security) listStatus:221, FileInputFormat (org.apache.hadoop.mapred) getSplits:332, FileInputFormat (org.apache.hadoop.mapred) getNextSplits:372, FetchOperator (org.apache.hadoop.hive.ql.exec) getRecordReader:304, FetchOperator (org.apache.hadoop.hive.ql.exec) getNextRow:459, FetchOperator (org.apache.hadoop.hive.ql.exec) pushRow:428, FetchOperator (org.apache.hadoop.hive.ql.exec) fetch:147, FetchTask (org.apache.hadoop.hive.ql.exec) getResults:2208, Driver (org.apache.hadoop.hive.ql) getNextRowSet:494, SQLOperation (org.apache.hive.service.cli.operation) getNextRowSetInternal:105, HiveOperation (org.apache.kyuubi.engine.hive.operation) ``` Theoretically, it can be solved by add AM DelegationTokens into `org.apache.hadoop.hive.ql.exec.FetchOperator.job.credentials`. But actually, it is impossible without modifying Hive's source code. ## Types of changes 🔖 - [ ] Bugfix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to change) ## Test Plan 🧪 #### Behavior Without This Pull Request ⚰️ HiveSQLEngine can not run on a kerberized YARN #### Behavior With This Pull Request 🎉 HiveSQLEngine can run on a kerberized YARN #### Related Unit Tests --- # Checklist 📝 - [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html) **Be nice. Be informative.** Closes #6199 from zhouyifan279/kerberized-hive-engine-on-yarn. Closes #6199 383d1cd [zhouyifan279] Fix tests 458493a [zhouyifan279] Warn if run Hive on YARN without principal and keytab 118afe2 [zhouyifan279] Warn if run Hive on YARN without principal and keytab 41fed0c [zhouyifan279] Ignore Principal&Keytab when hadoop security is no enabled. 9e2d862 [Cheng Pan] Update kyuubi-server/src/main/scala/org/apache/kyuubi/engine/hive/HiveProcessBuilder.scala 5ae0a3e [zhouyifan279] Remove redundant checks 5d3013a [zhouyifan279] Use principal & keytab in Local mode 5733dfd [zhouyifan279] Use principal & keytab in Local mode 85ce9bb [zhouyifan279] Use principal & keytab in Local mode 061223d [zhouyifan279] Resolve comments e706936 [zhouyifan279] Resolve comments f84c7bc [zhouyifan279] Support run HiveSQLEngine on kerberized YARN 4d262c8 [zhouyifan279] Support run HiveSQLEngine on kerberized YARN Lead-authored-by: zhouyifan279 <[email protected]> Co-authored-by: Cheng Pan <[email protected]> Signed-off-by: Cheng Pan <[email protected]>
apache · Mar 22, 2024 · a196ace · a196ace
1 parent e1861d9
commit a196ace
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diff --git a/docs/configuration/settings.md b/docs/configuration/settings.md
diff --git a/...s/kyuubi-hive-sql-engine/src/main/scala/org/apache/kyuubi/engine/hive/HiveSQLEngine.scala b/...s/kyuubi-hive-sql-engine/src/main/scala/org/apache/kyuubi/engine/hive/HiveSQLEngine.scala
@@ -27,6 +27,8 @@ import org.apache.hadoop.security.UserGroupInformation
 
 import org.apache.kyuubi.{Logging, Utils}
 import org.apache.kyuubi.config.{KyuubiConf, KyuubiReservedKeys}
+import org.apache.kyuubi.config.KyuubiConf.{ENGINE_HIVE_DEPLOY_MODE, ENGINE_KEYTAB, ENGINE_PRINCIPAL}
+import org.apache.kyuubi.engine.deploy.DeployMode
 import org.apache.kyuubi.engine.hive.HiveSQLEngine.currentEngine
 import org.apache.kyuubi.engine.hive.events.{HiveEngineEvent, HiveEventHandlerRegister}
 import org.apache.kyuubi.events.EventBus
@@ -133,26 +135,37 @@ object HiveSQLEngine extends Logging {
     SignalRegister.registerLogger(logger)
     try {
       Utils.fromCommandLineArgs(args, kyuubiConf)
-      val sessionUser = kyuubiConf.getOption(KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY)
+      val proxyUser = kyuubiConf.getOption(KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY)
+      require(proxyUser.isDefined, s"${KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY} is not set")
       val realUser = UserGroupInformation.getLoginUser
-
-      if (sessionUser.isEmpty || sessionUser.get == realUser.getShortUserName) {
-        startEngine()
-      } else {
-        val effectiveUser = UserGroupInformation.createProxyUser(sessionUser.get, realUser)
-        effectiveUser.doAs(new PrivilegedExceptionAction[Unit] {
-          override def run(): Unit = {
-            val engineCredentials =
-              kyuubiConf.getOption(KyuubiReservedKeys.KYUUBI_ENGINE_CREDENTIALS_KEY)
-            kyuubiConf.unset(KyuubiReservedKeys.KYUUBI_ENGINE_CREDENTIALS_KEY)
-            engineCredentials.filter(_.nonEmpty).foreach { credentials =>
-              HiveTBinaryFrontendService.renewDelegationToken(credentials)
+      val principal = kyuubiConf.get(ENGINE_PRINCIPAL)
+      val keytab = kyuubiConf.get(ENGINE_KEYTAB)
+
+      val ugi = DeployMode.withName(kyuubiConf.get(ENGINE_HIVE_DEPLOY_MODE)) match {
+        case DeployMode.LOCAL
+            if UserGroupInformation.isSecurityEnabled && principal.isDefined && keytab.isDefined =>
+          UserGroupInformation.loginUserFromKeytab(principal.get, keytab.get)
+          UserGroupInformation.getCurrentUser
+        case DeployMode.LOCAL if proxyUser.get != realUser.getShortUserName =>
+          val newUGI = UserGroupInformation.createProxyUser(proxyUser.get, realUser)
+          newUGI.doAs(new PrivilegedExceptionAction[Unit] {
+            override def run(): Unit = {
+              val engineCredentials =
+                kyuubiConf.getOption(KyuubiReservedKeys.KYUUBI_ENGINE_CREDENTIALS_KEY)
+              kyuubiConf.unset(KyuubiReservedKeys.KYUUBI_ENGINE_CREDENTIALS_KEY)
+              engineCredentials.filter(_.nonEmpty).foreach { credentials =>
+                HiveTBinaryFrontendService.renewDelegationToken(credentials)
+              }
             }
-            startEngine()
-          }
-        })
+          })
+          newUGI
+        case _ =>
+          UserGroupInformation.getCurrentUser
       }
 
+      ugi.doAs(new PrivilegedExceptionAction[Unit] {
+        override def run(): Unit = startEngine()
+      })
     } catch {
       case t: Throwable =>
         currentEngine match {

diff --git a/...ql-engine/src/main/scala/org/apache/kyuubi/engine/hive/deploy/HiveYarnModeSubmitter.scala b/...ql-engine/src/main/scala/org/apache/kyuubi/engine/hive/deploy/HiveYarnModeSubmitter.scala
@@ -20,7 +20,10 @@ import java.io.File
 
 import scala.collection.mutable.ListBuffer
 
+import org.apache.hadoop.security.UserGroupInformation
+
 import org.apache.kyuubi.Utils
+import org.apache.kyuubi.config.KyuubiConf
 import org.apache.kyuubi.config.KyuubiConf.ENGINE_HIVE_EXTRA_CLASSPATH
 import org.apache.kyuubi.engine.deploy.yarn.EngineYarnModeSubmitter
 import org.apache.kyuubi.engine.hive.HiveSQLEngine
@@ -29,7 +32,16 @@ object HiveYarnModeSubmitter extends EngineYarnModeSubmitter {
 
   def main(args: Array[String]): Unit = {
     Utils.fromCommandLineArgs(args, kyuubiConf)
-    submitApplication()
+
+    if (UserGroupInformation.isSecurityEnabled) {
+      require(
+        kyuubiConf.get(KyuubiConf.ENGINE_PRINCIPAL).isDefined
+          && kyuubiConf.get(KyuubiConf.ENGINE_KEYTAB).isDefined,
+        s"${KyuubiConf.ENGINE_PRINCIPAL.key} and " +
+          s"${KyuubiConf.ENGINE_KEYTAB.key} must be set when submit " +
+          s"${HiveSQLEngine.getClass.getSimpleName.stripSuffix("$")} to YARN")
+    }
+    run()
   }
 
   override var engineType: String = "hive"

diff --git a/...est/scala/org/apache/kyuubi/engine/hive/operation/HiveCatalogDatabaseOperationSuite.scala b/...est/scala/org/apache/kyuubi/engine/hive/operation/HiveCatalogDatabaseOperationSuite.scala
@@ -21,6 +21,7 @@ import org.apache.commons.lang3.{JavaVersion, SystemUtils}
 
 import org.apache.kyuubi.Utils
 import org.apache.kyuubi.config.KyuubiConf.ENGINE_OPERATION_CONVERT_CATALOG_DATABASE_ENABLED
+import org.apache.kyuubi.config.KyuubiReservedKeys
 import org.apache.kyuubi.engine.hive.HiveSQLEngine
 import org.apache.kyuubi.operation.HiveJDBCTestHelper
 import org.apache.kyuubi.util.command.CommandLineUtils._
@@ -34,7 +35,9 @@ class HiveCatalogDatabaseOperationSuite extends HiveJDBCTestHelper {
       CONF,
       s"javax.jdo.option.ConnectionURL=jdbc:derby:;databaseName=$metastore;create=true",
       CONF,
-      s"${ENGINE_OPERATION_CONVERT_CATALOG_DATABASE_ENABLED.key}=true")
+      s"${ENGINE_OPERATION_CONVERT_CATALOG_DATABASE_ENABLED.key}=true",
+      CONF,
+      s"${KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY}=kyuubi")
     HiveSQLEngine.main(args)
     super.beforeAll()
   }

diff --git a/...ql-engine/src/test/scala/org/apache/kyuubi/engine/hive/operation/HiveOperationSuite.scala b/...ql-engine/src/test/scala/org/apache/kyuubi/engine/hive/operation/HiveOperationSuite.scala
@@ -20,6 +20,7 @@ package org.apache.kyuubi.engine.hive.operation
 import org.apache.commons.lang3.{JavaVersion, SystemUtils}
 
 import org.apache.kyuubi.{HiveEngineTests, KYUUBI_VERSION, Utils}
+import org.apache.kyuubi.config.KyuubiReservedKeys
 import org.apache.kyuubi.engine.hive.HiveSQLEngine
 import org.apache.kyuubi.jdbc.hive.KyuubiStatement
 import org.apache.kyuubi.util.command.CommandLineUtils._
@@ -31,7 +32,9 @@ class HiveOperationSuite extends HiveEngineTests {
     metastore.toFile.delete()
     val args = Array(
       CONF,
-      s"javax.jdo.option.ConnectionURL=jdbc:derby:;databaseName=$metastore;create=true")
+      s"javax.jdo.option.ConnectionURL=jdbc:derby:;databaseName=$metastore;create=true",
+      CONF,
+      s"${KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY}=kyuubi")
     HiveSQLEngine.main(args)
     super.beforeAll()
   }

diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/config/KyuubiConf.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/config/KyuubiConf.scala
@@ -2836,6 +2836,20 @@ object KyuubiConf {
       .stringConf
       .createOptional
 
+  val ENGINE_PRINCIPAL: OptionalConfigEntry[String] =
+    buildConf("kyuubi.engine.principal")
+      .doc("Kerberos principal for the kyuubi engine.")
+      .version("1.10.0")
+      .stringConf
+      .createOptional
+
+  val ENGINE_KEYTAB: OptionalConfigEntry[String] =
+    buildConf("kyuubi.engine.keytab")
+      .doc("Kerberos keytab for the kyuubi engine.")
+      .version("1.10.0")
+      .stringConf
+      .createOptional
+
   val ENGINE_FLINK_MEMORY: ConfigEntry[String] =
     buildConf("kyuubi.engine.flink.memory")
       .doc("The heap memory for the Flink SQL engine. Only effective in yarn session mode.")

diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/engine/deploy/yarn/ApplicationMaster.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/engine/deploy/yarn/ApplicationMaster.scala
@@ -17,17 +17,20 @@
 package org.apache.kyuubi.engine.deploy.yarn
 
 import java.io.{File, IOException}
+import java.security.PrivilegedExceptionAction
 
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.security.UserGroupInformation
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus
 import org.apache.hadoop.yarn.client.api.AMRMClient
 import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest
 import org.apache.hadoop.yarn.conf.YarnConfiguration
+import org.apache.hadoop.yarn.security.AMRMTokenIdentifier
 
-import org.apache.kyuubi.{Logging, Utils}
-import org.apache.kyuubi.config.KyuubiConf
+import org.apache.kyuubi.{KyuubiException, Logging, Utils}
+import org.apache.kyuubi.config.{KyuubiConf, KyuubiReservedKeys}
 import org.apache.kyuubi.service.Serverable
 import org.apache.kyuubi.util.KyuubiHadoopUtils
 import org.apache.kyuubi.util.command.CommandLineUtils.confKeyValues
@@ -71,7 +74,43 @@ object ApplicationMaster extends Logging {
           unregister(finalStatus, finalMsg)
         }
       })
-      runApplicationMaster()
+
+      val ugi = kyuubiConf.get(KyuubiConf.ENGINE_PRINCIPAL) match {
+        case Some(principalName) if UserGroupInformation.isSecurityEnabled =>
+          val originalCreds = UserGroupInformation.getCurrentUser().getCredentials()
+          val keytabFilename = kyuubiConf.get(KyuubiConf.ENGINE_KEYTAB).orNull
+          if (!new File(keytabFilename).exists()) {
+            throw new KyuubiException(s"Keytab file: $keytabFilename does not exist")
+          } else {
+            info("Attempting to login to Kerberos " +
+              s"using principal: $principalName and keytab: $keytabFilename")
+            UserGroupInformation.loginUserFromKeytab(principalName, keytabFilename)
+          }
+
+          val newUGI = UserGroupInformation.getCurrentUser()
+
+          // Transfer YARN_AM_RM_TOKEN to the new user.
+          // Not transfer other tokens, such as HDFS_DELEGATION_TOKEN,
+          // to avoid "org.apache.hadoop.ipc.RemoteException(java.io.IOException):
+          // Delegation Token can be issued only with kerberos or web authentication"
+          // when engine tries to obtain new tokens.
+          KyuubiHadoopUtils.getTokenMap(originalCreds).values
+            .find(_.getKind == AMRMTokenIdentifier.KIND_NAME)
+            .foreach { token =>
+              newUGI.addToken(token)
+            }
+          newUGI
+        case _ =>
+          val appUser = kyuubiConf.getOption(KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY)
+          require(appUser.isDefined, s"${KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY} is not set")
+          val newUGI = UserGroupInformation.createRemoteUser(appUser.get)
+          newUGI.addCredentials(UserGroupInformation.getCurrentUser.getCredentials)
+          newUGI
+      }
+
+      ugi.doAs(new PrivilegedExceptionAction[Unit] {
+        override def run(): Unit = runApplicationMaster()
+      })
     } catch {
       case t: Throwable =>
         error("Error running ApplicationMaster", t)

diff --git a/...-common/src/main/scala/org/apache/kyuubi/engine/deploy/yarn/EngineYarnModeSubmitter.scala b/...-common/src/main/scala/org/apache/kyuubi/engine/deploy/yarn/EngineYarnModeSubmitter.scala
@@ -17,10 +17,12 @@
 package org.apache.kyuubi.engine.deploy.yarn
 
 import java.io._
+import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
+import java.security.PrivilegedExceptionAction
 import java.util
-import java.util.{Locale, Properties}
+import java.util.{Locale, Properties, UUID}
 import java.util.zip.{ZipEntry, ZipOutputStream}
 
 import scala.collection.JavaConverters._
@@ -30,7 +32,8 @@ import scala.collection.mutable.ListBuffer
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.fs.permission.FsPermission
-import org.apache.hadoop.security.UserGroupInformation
+import org.apache.hadoop.mapred.Master
+import org.apache.hadoop.security.{Credentials, UserGroupInformation}
 import org.apache.hadoop.yarn.api.ApplicationConstants
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
 import org.apache.hadoop.yarn.api.records._
@@ -40,6 +43,7 @@ import org.apache.hadoop.yarn.util.Records
 import org.apache.kyuubi.{KyuubiException, Logging, Utils}
 import org.apache.kyuubi.config.KyuubiConf
 import org.apache.kyuubi.config.KyuubiConf._
+import org.apache.kyuubi.config.KyuubiReservedKeys.KYUUBI_SESSION_USER_KEY
 import org.apache.kyuubi.engine.deploy.yarn.EngineYarnModeSubmitter._
 import org.apache.kyuubi.util.KyuubiHadoopUtils
 
@@ -81,6 +85,9 @@ abstract class EngineYarnModeSubmitter extends Logging {
 
   var yarnConf: Configuration = _
   var hadoopConf: Configuration = _
+  var appUser: String = _
+  var keytab: String = _
+  var amKeytabFileName: Option[String] = _
 
   var engineType: String
 
@@ -91,9 +98,35 @@ abstract class EngineYarnModeSubmitter extends Logging {
    */
   def engineExtraJars(): Seq[File] = Seq.empty
 
-  protected def submitApplication(): Unit = {
+  def run(): Unit = {
     yarnConf = KyuubiHadoopUtils.newYarnConfiguration(kyuubiConf)
     hadoopConf = KyuubiHadoopUtils.newHadoopConf(kyuubiConf)
+    appUser = kyuubiConf.getOption(KYUUBI_SESSION_USER_KEY).orNull
+    require(appUser != null, s"$KYUUBI_SESSION_USER_KEY is not set")
+    keytab = kyuubiConf.get(ENGINE_KEYTAB).orNull
+    val principal = kyuubiConf.get(ENGINE_PRINCIPAL).orNull
+    amKeytabFileName =
+      if (UserGroupInformation.isSecurityEnabled && principal != null && keytab != null) {
+        info(s"Kerberos credentials: principal = $principal, keytab = $keytab")
+        UserGroupInformation.loginUserFromKeytab(principal, keytab)
+        // Generate a file name that can be used for the keytab file, that does not conflict
+        // with any user file.
+        Some(new File(keytab).getName() + "-" + UUID.randomUUID().toString)
+      } else {
+        None
+      }
+
+    val ugi = if (UserGroupInformation.getCurrentUser.getShortUserName == appUser) {
+      UserGroupInformation.getCurrentUser
+    } else {
+      UserGroupInformation.createProxyUser(appUser, UserGroupInformation.getCurrentUser)
+    }
+    ugi.doAs(new PrivilegedExceptionAction[Unit] {
+      override def run(): Unit = submitApplication()
+    })
+  }
+
+  protected def submitApplication(): Unit = {
     try {
       yarnClient = YarnClient.createYarnClient()
       yarnClient.init(yarnConf)
@@ -134,6 +167,29 @@ abstract class EngineYarnModeSubmitter extends Logging {
     }
   }
 
+  private def setupSecurityToken(amContainer: ContainerLaunchContext): Unit = {
+    if (UserGroupInformation.isSecurityEnabled) {
+      val credentials = obtainHadoopFsDelegationToken()
+      val serializedCreds = KyuubiHadoopUtils.serializeCredentials(credentials)
+      amContainer.setTokens(ByteBuffer.wrap(serializedCreds))
+    }
+  }
+
+  private def obtainHadoopFsDelegationToken(): Credentials = {
+    val tokenRenewer = Master.getMasterPrincipal(hadoopConf)
+    info(s"Delegation token renewer is: $tokenRenewer")
+
+    if (tokenRenewer == null || tokenRenewer.isEmpty) {
+      val errorMessage = "Can't get Master Kerberos principal for use as renewer."
+      error(errorMessage)
+      throw new KyuubiException(errorMessage)
+    }
+
+    val credentials = new Credentials()
+    FileSystem.get(hadoopConf).addDelegationTokens(tokenRenewer, credentials)
+    credentials
+  }
+
   private def createContainerLaunchContext(): ContainerLaunchContext = {
     info("Setting up container launch context for engine AM")
     val env = setupLaunchEnv(kyuubiConf)
@@ -171,6 +227,7 @@ abstract class EngineYarnModeSubmitter extends Logging {
     amContainer.setCommands(printableCommands.asJava)
     info(s"Commands: ${printableCommands.mkString(" ")}")
 
+    setupSecurityToken(amContainer)
     amContainer
   }
 
@@ -187,6 +244,19 @@ abstract class EngineYarnModeSubmitter extends Logging {
 
     distributeJars(localResources, env)
     distributeConf(localResources, env)
+
+    // If we passed in a keytab, make sure we copy the keytab to the staging directory on
+    // HDFS, and setup the relevant environment vars, so the AM can login again.
+    amKeytabFileName.foreach { kt =>
+      info("To enable the AM to login from keytab, credentials are being copied over to the AM" +
+        " via the YARN Secure Distributed Cache.")
+      distribute(
+        new Path(new File(keytab).toURI),
+        LocalResourceType.FILE,
+        kt,
+        localResources)
+    }
+
     localResources
   }
 
@@ -253,6 +323,7 @@ abstract class EngineYarnModeSubmitter extends Logging {
       listDistinctFiles(yarnConf.get).foreach(putEntry)
 
       val properties = confToProperties(kyuubiConf)
+      amKeytabFileName.foreach(kt => properties.put(ENGINE_KEYTAB.key, kt))
       writePropertiesToArchive(properties, KYUUBI_CONF_FILE, confStream)
     } finally {
       confStream.close()

diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/util/KyuubiHadoopUtils.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/util/KyuubiHadoopUtils.scala
@@ -72,6 +72,21 @@ object KyuubiHadoopUtils extends Logging {
     creds
   }
 
+  def serializeCredentials(creds: Credentials): Array[Byte] = {
+    val byteStream = new ByteArrayOutputStream
+    val dataStream = new DataOutputStream(byteStream)
+    creds.writeTokenStorageToStream(dataStream)
+    byteStream.toByteArray
+  }
+
+  def deserializeCredentials(tokenBytes: Array[Byte]): Credentials = {
+    val tokensBuf = new ByteArrayInputStream(tokenBytes)
+
+    val creds = new Credentials()
+    creds.readTokenStorageStream(new DataInputStream(tokensBuf))
+    creds
+  }
+
   /**
    * Get [[Credentials#tokenMap]] by reflection as [[Credentials#getTokenMap]] is not present before
    * Hadoop 3.2.1.