| /* |
| * 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.hbase.util; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.BindException; |
| import java.net.InetAddress; |
| import java.util.function.Supplier; |
| import org.apache.hadoop.hbase.net.BoundSocketMaker; |
| import org.apache.kerby.kerberos.kerb.KrbException; |
| import org.apache.kerby.kerberos.kerb.server.SimpleKdcServer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.com.google.common.base.Preconditions; |
| |
| /** |
| * Utility for running {@link SimpleKdcServer}. Kerby KDC server is favored over Hadoop |
| * org.apache.hadoop.minikdc server which has support in the HBaseTestingUtility at |
| * #setupMiniKdc. The Kerby KDC Server came in with HBASE-5291. Its preferred. Less baggage. |
| * @see #getRunningSimpleKdcServer(File, Supplier) |
| */ |
| public final class SimpleKdcServerUtil { |
| protected static final Logger LOG = LoggerFactory.getLogger(SimpleKdcServerUtil.class); |
| |
| private SimpleKdcServerUtil() {} |
| |
| /** |
| * Returns a running kdc server. Use this method rather than start the SimpleKdcServer |
| * yourself because it takes care of BindExceptions which can happen even though port-picking |
| * is random (between the choice of port number and bind, it could have been used elsewhere). |
| * @return A SimpleKdcServer on which 'start' has been called; be sure to call stop on this |
| * instance when done. |
| */ |
| public static SimpleKdcServer getRunningSimpleKdcServer(File testDir, |
| Supplier<Integer> randomPortGenerator) throws KrbException, IOException { |
| return getRunningSimpleKdcServer(testDir, randomPortGenerator, false); |
| } |
| |
| /** |
| * Internal method for testing. |
| * @param portClash True if we want to generate BindException (for testing). |
| * @return A running SimpleKdcServer on loopback/'localhost' on a random port |
| * @see #getRunningSimpleKdcServer(File, Supplier) |
| */ |
| static SimpleKdcServer getRunningSimpleKdcServer(File testDir, |
| Supplier<Integer> randomPortGenerator, final boolean portClash) |
| throws KrbException, IOException { |
| File kdcDir = new File(testDir, SimpleKdcServer.class.getSimpleName()); |
| Preconditions.checkArgument(kdcDir.mkdirs(), "Failed create of " + kdcDir); |
| String hostName = InetAddress.getLoopbackAddress().getHostName(); |
| BoundSocketMaker bsm = portClash? new BoundSocketMaker(randomPortGenerator): null; |
| final int retries = 10; |
| for (int i = 0; i < retries; i++) { |
| SimpleKdcServer kdc = new SimpleKdcServer(); |
| kdc.setWorkDir(kdcDir); |
| kdc.setKdcHost(hostName); |
| kdc.setAllowTcp(true); |
| kdc.setAllowUdp(false); |
| int kdcPort = bsm != null? bsm.getPort(): randomPortGenerator.get(); |
| try { |
| kdc.setKdcTcpPort(kdcPort); |
| LOG.info("Starting KDC server at {}:{}", hostName, kdcPort); |
| kdc.init(); |
| kdc.start(); |
| return kdc; |
| } catch (KrbException ke) { |
| if (kdc != null) { |
| kdc.stop(); |
| } |
| if (ke.getCause() != null && ke.getCause() instanceof BindException) { |
| LOG.info("Clashed using port {}; getting a new random port", kdcPort); |
| continue; |
| } else { |
| throw ke; |
| } |
| } finally { |
| if (bsm != null) { |
| bsm.close(); |
| bsm = null; |
| } |
| } |
| } |
| // If we get here, we exhausted our retries. Fail. |
| throw new KrbException("Failed create of SimpleKdcServer after " + retries + " attempts"); |
| } |
| } |