| /** |
| * 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.storm.hdfs.security; |
| |
| import static org.apache.storm.Config.TOPOLOGY_AUTO_CREDENTIALS; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.SecurityUtil; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import org.apache.storm.security.auth.kerberos.AutoTGT; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class provides util methods for storm-hdfs connector communicating |
| * with secured HDFS. |
| */ |
| public final class HdfsSecurityUtil { |
| public static final String STORM_KEYTAB_FILE_KEY = "hdfs.keytab.file"; |
| public static final String STORM_USER_NAME_KEY = "hdfs.kerberos.principal"; |
| public static final String HDFS_CREDENTIALS_CONFIG_KEYS = "hdfsCredentialsConfigKeys"; |
| public static final String HDFS_CREDENTIALS = "HDFS_CREDENTIALS"; |
| public static final String TOPOLOGY_HDFS_URI = "topology.hdfs.uri"; |
| |
| private static final Logger LOG = LoggerFactory.getLogger(HdfsSecurityUtil.class); |
| private static AtomicBoolean isLoggedIn = new AtomicBoolean(); |
| |
| private HdfsSecurityUtil() { |
| } |
| |
| public static void login(Map<String, Object> conf, Configuration hdfsConfig) throws IOException { |
| //If AutoHDFS is specified, do not attempt to login using keytabs, only kept for backward compatibility. |
| if (conf.get(TOPOLOGY_AUTO_CREDENTIALS) == null |
| || (!(((List)conf.get(TOPOLOGY_AUTO_CREDENTIALS)).contains(AutoHDFS.class.getName())) |
| && !(((List)conf.get(TOPOLOGY_AUTO_CREDENTIALS)).contains(AutoTGT.class.getName())))) { |
| if (UserGroupInformation.isSecurityEnabled()) { |
| // compareAndSet added because of https://issues.apache.org/jira/browse/STORM-1535 |
| if (isLoggedIn.compareAndSet(false, true)) { |
| LOG.info("Logging in using keytab as AutoHDFS is not specified for " + TOPOLOGY_AUTO_CREDENTIALS); |
| String keytab = (String) conf.get(STORM_KEYTAB_FILE_KEY); |
| if (keytab != null) { |
| hdfsConfig.set(STORM_KEYTAB_FILE_KEY, keytab); |
| } |
| String userName = (String) conf.get(STORM_USER_NAME_KEY); |
| if (userName != null) { |
| hdfsConfig.set(STORM_USER_NAME_KEY, userName); |
| } |
| SecurityUtil.login(hdfsConfig, STORM_KEYTAB_FILE_KEY, STORM_USER_NAME_KEY); |
| } |
| } |
| } |
| } |
| } |