| /** |
| * 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.hadoop.hdfs.server.federation.router; |
| |
| import static org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.merge; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver; |
| import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamespaceInfo; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory; |
| import org.apache.hadoop.security.Groups; |
| import org.apache.hadoop.security.RefreshUserMappingsProtocol; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.authorize.ProxyUsers; |
| import org.apache.hadoop.tools.GetUserMappingsProtocol; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Module that implements all the RPC calls in |
| * {@link RefreshUserMappingsProtocol} {@link GetUserMappingsProtocol} in the |
| * {@link RouterRpcServer}. |
| */ |
| public class RouterUserProtocol |
| implements RefreshUserMappingsProtocol, GetUserMappingsProtocol { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(RouterUserProtocol.class); |
| |
| /** RPC server to receive client calls. */ |
| private final RouterRpcServer rpcServer; |
| /** RPC clients to connect to the Namenodes. */ |
| private final RouterRpcClient rpcClient; |
| |
| private final ActiveNamenodeResolver namenodeResolver; |
| |
| public RouterUserProtocol(RouterRpcServer server) { |
| this.rpcServer = server; |
| this.rpcClient = this.rpcServer.getRPCClient(); |
| this.namenodeResolver = this.rpcServer.getNamenodeResolver(); |
| } |
| |
| @Override |
| public void refreshUserToGroupsMappings() throws IOException { |
| LOG.debug("Refresh user groups mapping in Router."); |
| rpcServer.checkOperation(OperationCategory.UNCHECKED); |
| Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); |
| if (nss.isEmpty()) { |
| Groups.getUserToGroupsMappingService().refresh(); |
| } else { |
| RemoteMethod method = new RemoteMethod(RefreshUserMappingsProtocol.class, |
| "refreshUserToGroupsMappings"); |
| rpcClient.invokeConcurrent(nss, method); |
| } |
| } |
| |
| @Override |
| public void refreshSuperUserGroupsConfiguration() throws IOException { |
| LOG.debug("Refresh superuser groups configuration in Router."); |
| rpcServer.checkOperation(OperationCategory.UNCHECKED); |
| Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); |
| if (nss.isEmpty()) { |
| ProxyUsers.refreshSuperUserGroupsConfiguration(); |
| } else { |
| RemoteMethod method = new RemoteMethod(RefreshUserMappingsProtocol.class, |
| "refreshSuperUserGroupsConfiguration"); |
| rpcClient.invokeConcurrent(nss, method); |
| } |
| } |
| |
| @Override |
| public String[] getGroupsForUser(String user) throws IOException { |
| LOG.debug("Getting groups for user {}", user); |
| rpcServer.checkOperation(OperationCategory.UNCHECKED); |
| Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); |
| if (nss.isEmpty()) { |
| return UserGroupInformation.createRemoteUser(user).getGroupNames(); |
| } else { |
| RemoteMethod method = new RemoteMethod(GetUserMappingsProtocol.class, |
| "getGroupsForUser", new Class<?>[] {String.class}, user); |
| Map<FederationNamespaceInfo, String[]> results = |
| rpcClient.invokeConcurrent(nss, method, String[].class); |
| return merge(results, String.class); |
| } |
| } |
| } |