[HUDI-4718] Add Kerberos kinit command support.

Author: paul8263

hudi-cli/src/main/java/org/apache/hudi/cli/commands/KerberosAuthenticationCommand.java

@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hudi.cli.commands;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.security.UserGroupInformation;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import org.springframework.shell.standard.ShellOption;
+
+import java.io.IOException;
+
+/**
+ * CLI command to perform Kerberos authentication.
+ */
+@ShellComponent
+public class KerberosAuthenticationCommand {
+
+  @ShellMethod(key = "kerberos kinit", value = "Perform Kerberos authentication")
+  public String performKerberosAuthentication(
+          @ShellOption(value = "--krb5conf", help = "Path to krb5.conf", defaultValue = "/etc/krb5.conf") String krb5ConfPath,
+          @ShellOption(value = "--principal", help = "Kerberos principal") String principal,
+          @ShellOption(value = "--keytab", help = "Path to keytab") String keytabPath) throws IOException {
+
+    System.out.println("Perform Kerberos authentication");
+    System.out.println("Parameters:");
+    System.out.println("--krb5conf: " + krb5ConfPath);
+    System.out.println("--principal: " + principal);
+    System.out.println("--keytab: " + keytabPath);
+
+    System.setProperty("java.security.krb5.conf", krb5ConfPath);
+    Configuration conf = new Configuration();
+    conf.set("hadoop.security.authentication", "kerberos");
+    conf.set("keytab.file", keytabPath);
+    conf.set("kerberos.principal", principal);
+    UserGroupInformation.setConfiguration(conf);
+    UserGroupInformation.loginUserFromKeytab(principal, keytabPath);
+
+    System.out.println("Kerberos current user: " + UserGroupInformation.getCurrentUser());
+    System.out.println("Kerberos login user: " + UserGroupInformation.getLoginUser());
+
+    return "Kerberos authentication success";
+  }
+}