Github user mxm commented on a diff in the pull request: https://github.com/apache/flink/pull/2275#discussion_r72450591 --- Diff: flink-test-utils-parent/flink-test-utils/src/main/java/org/apache/flink/test/util/SecureTestEnvironment.java --- @@ -0,0 +1,207 @@ +/* + * 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.flink.test.util; + +import org.apache.flink.configuration.ConfigConstants; +import org.apache.flink.runtime.security.SecurityContext; +import org.apache.hadoop.fs.FileUtil; +import org.apache.hadoop.minikdc.MiniKdc; +import org.junit.rules.TemporaryFolder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static org.junit.Assert.assertTrue; + +import javax.annotation.Nullable; +import java.io.File; +import java.util.HashMap; +import java.util.Map; +import java.util.Properties; + +/** + * Helper {@link SecureTestEnvironment} to handle MiniKDC lifecycle. + * This class can be used to start/stop MiniKDC and create secure configurations for MiniDFSCluster + * and MiniYarn + */ + +public class SecureTestEnvironment { + + protected static final Logger LOG = LoggerFactory.getLogger(SecureTestEnvironment.class); + + private static MiniKdc kdc; + + private static String testKeytab = null; + + private static String testPrincipal = null; + + private static String testZkServerPrincipal = null; + + private static String hadoopServicePrincipal = null; + + private static File baseDirForSecureRun = null; + + public static void prepare(TemporaryFolder tempFolder) { + + try { + baseDirForSecureRun = tempFolder.newFolder(); + + LOG.info("Base Directory for Secure Environment: {}", baseDirForSecureRun); + + FileUtil.fullyDelete(baseDirForSecureRun); + + assertTrue(baseDirForSecureRun.mkdirs()); + + Properties kdcConf = MiniKdc.createConf(); + + kdc = new MiniKdc(kdcConf, baseDirForSecureRun); + + kdc.start(); + + LOG.info("Started Mini KDC"); + + File keytabFile = new File(baseDirForSecureRun, "test-users.keytab"); + + testKeytab = keytabFile.getAbsolutePath(); + + testZkServerPrincipal = "zookeeper/127.0.0.1"; + + hadoopServicePrincipal = "hadoop/localhost"; + + testPrincipal = "client/localhost"; + + kdc.createPrincipal(keytabFile, testPrincipal, testZkServerPrincipal, hadoopServicePrincipal); + + + testPrincipal = testPrincipal + "@" + kdc.getRealm(); + testZkServerPrincipal = testZkServerPrincipal + "@" + kdc.getRealm(); + hadoopServicePrincipal = hadoopServicePrincipal + "@" + kdc.getRealm(); + + LOG.info("-------------------------------------------------------------------"); + LOG.info("Test Principal: {}", testPrincipal); + LOG.info("Test ZK Server Principal: {}", testZkServerPrincipal); + LOG.info("Test Hadoop Service Principal: {}", hadoopServicePrincipal); + LOG.info("Test Keytab: {}", testKeytab); + LOG.info("-------------------------------------------------------------------"); + + //Security Context is established to allow non hadoop applications that requires JAAS + //based SASL/Kerberos authentication to work. However, for Hadoop specific applications + //the context can be reinitialized with Hadoop configuration by calling + //ctx.setHadoopConfiguration() for the UGI implementation to work properly. + //See Yarn test case module for reference + SecurityContext.SecurityConfiguration ctx = new SecurityContext.SecurityConfiguration(); + ctx.setCredentials(testKeytab, testPrincipal); + TestingSecurityContext.install(ctx, getClientSecurityConfigurationMap()); + + populateSystemEnvVariables(); + + } catch(Exception e) { + LOG.error("Exception occured while preparing secure environment. Reason: {}", e); + throw new RuntimeException(e); + } + + } + + public static void cleanup() { + + LOG.info("Cleaning up Secure Environment"); + + if( kdc != null) { + kdc.stop(); + LOG.info("Stopped KDC server"); + } + + if(baseDirForSecureRun != null) { + try { + FileUtil.fullyDelete(baseDirForSecureRun); --- End diff -- Not necessary to cleanup `TemporaryFolder`.
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