| /** |
| * 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; |
| |
| import static org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType.DATA_NODE; |
| import static org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType.NAME_NODE; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.protocol.FSConstants; |
| import org.apache.hadoop.hdfs.server.common.Storage; |
| import org.apache.hadoop.hdfs.server.common.StorageInfo; |
| import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption; |
| import org.apache.hadoop.hdfs.server.namenode.TestParallelImageWrite; |
| import org.junit.Test; |
| import static org.junit.Assert.*; |
| |
| /** |
| * This test ensures the appropriate response (successful or failure) from |
| * the system when the system is upgraded under various storage state and |
| * version conditions. |
| */ |
| public class TestDFSUpgrade { |
| |
| private static final Log LOG = LogFactory.getLog( |
| "org.apache.hadoop.hdfs.TestDFSUpgrade"); |
| private Configuration conf; |
| private int testCounter = 0; |
| private MiniDFSCluster cluster = null; |
| |
| /** |
| * Writes an INFO log message containing the parameters. |
| */ |
| void log(String label, int numDirs) { |
| LOG.info("============================================================"); |
| LOG.info("***TEST " + (testCounter++) + "*** " |
| + label + ":" |
| + " numDirs="+numDirs); |
| } |
| |
| /** |
| * For namenode, Verify that the current and previous directories exist. |
| * Verify that previous hasn't been modified by comparing the checksum of all |
| * its files with their original checksum. It is assumed that the |
| * server has recovered and upgraded. |
| */ |
| void checkNameNode(String[] baseDirs) throws IOException { |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertTrue(new File(baseDirs[i],"current").isDirectory()); |
| assertTrue(new File(baseDirs[i],"current/VERSION").isFile()); |
| assertTrue(new File(baseDirs[i],"current/edits").isFile()); |
| assertTrue(new File(baseDirs[i],"current/fsimage").isFile()); |
| assertTrue(new File(baseDirs[i],"current/fstime").isFile()); |
| |
| File previous = new File(baseDirs[i], "previous"); |
| assertTrue(previous.isDirectory()); |
| assertEquals(UpgradeUtilities.checksumContents(NAME_NODE, previous), |
| UpgradeUtilities.checksumMasterNameNodeContents()); |
| } |
| } |
| |
| /** |
| * For datanode, for a block pool, verify that the current and previous |
| * directories exist. Verify that previous hasn't been modified by comparing |
| * the checksum of all its files with their original checksum. It |
| * is assumed that the server has recovered and upgraded. |
| */ |
| void checkDataNode(String[] baseDirs, String bpid) throws IOException { |
| for (int i = 0; i < baseDirs.length; i++) { |
| File current = new File(baseDirs[i], "current/" + bpid + "/current"); |
| assertEquals(UpgradeUtilities.checksumContents(DATA_NODE, current), |
| UpgradeUtilities.checksumMasterDataNodeContents()); |
| |
| // block files are placed under <sd>/current/<bpid>/current/finalized |
| File currentFinalized = |
| MiniDFSCluster.getFinalizedDir(new File(baseDirs[i]), bpid); |
| assertEquals(UpgradeUtilities.checksumContents(DATA_NODE, currentFinalized), |
| UpgradeUtilities.checksumMasterBlockPoolFinalizedContents()); |
| |
| File previous = new File(baseDirs[i], "current/" + bpid + "/previous"); |
| assertTrue(previous.isDirectory()); |
| assertEquals(UpgradeUtilities.checksumContents(DATA_NODE, previous), |
| UpgradeUtilities.checksumMasterDataNodeContents()); |
| |
| File previousFinalized = |
| new File(baseDirs[i], "current/" + bpid + "/previous"+"/finalized"); |
| assertEquals(UpgradeUtilities.checksumContents(DATA_NODE, previousFinalized), |
| UpgradeUtilities.checksumMasterBlockPoolFinalizedContents()); |
| |
| } |
| } |
| /** |
| * Attempts to start a NameNode with the given operation. Starting |
| * the NameNode should throw an exception. |
| */ |
| void startNameNodeShouldFail(StartupOption operation) { |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .startupOption(operation) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .build(); // should fail |
| throw new AssertionError("NameNode should have failed to start"); |
| } catch (Exception expected) { |
| // expected |
| } |
| } |
| |
| /** |
| * Attempts to start a DataNode with the given operation. Starting |
| * the given block pool should fail. |
| * @param operation startup option |
| * @param bpid block pool Id that should fail to start |
| * @throws IOException |
| */ |
| void startBlockPoolShouldFail(StartupOption operation, String bpid) throws IOException { |
| cluster.startDataNodes(conf, 1, false, operation, null); // should fail |
| assertFalse("Block pool " + bpid + " should have failed to start", |
| cluster.getDataNodes().get(0).isBPServiceAlive(bpid)); |
| } |
| |
| /** |
| * Create an instance of a newly configured cluster for testing that does |
| * not manage its own directories or files |
| */ |
| private MiniDFSCluster createCluster() throws IOException { |
| return new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.UPGRADE) |
| .build(); |
| } |
| |
| /** |
| * This test attempts to upgrade the NameNode and DataNode under |
| * a number of valid and invalid conditions. |
| */ |
| @Test |
| public void testUpgrade() throws Exception { |
| File[] baseDirs; |
| UpgradeUtilities.initialize(); |
| |
| StorageInfo storageInfo = null; |
| for (int numDirs = 1; numDirs <= 2; numDirs++) { |
| conf = new HdfsConfiguration(); |
| conf.setInt("dfs.datanode.scan.period.hours", -1); |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs, conf); |
| String[] nameNodeDirs = conf.getStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY); |
| String[] dataNodeDirs = conf.getStrings(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY); |
| |
| log("Normal NameNode upgrade", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| checkNameNode(nameNodeDirs); |
| if (numDirs > 1) |
| TestParallelImageWrite.checkImages(cluster.getNamesystem(), numDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("Normal DataNode upgrade", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| cluster.startDataNodes(conf, 1, false, StartupOption.REGULAR, null); |
| checkDataNode(dataNodeDirs, UpgradeUtilities.getCurrentBlockPoolID(null)); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode upgrade with existing previous dir", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("DataNode upgrade with existing previous dir", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "previous"); |
| cluster.startDataNodes(conf, 1, false, StartupOption.REGULAR, null); |
| checkDataNode(dataNodeDirs, UpgradeUtilities.getCurrentBlockPoolID(null)); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("DataNode upgrade with future stored layout version in current", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| baseDirs = UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| storageInfo = new StorageInfo(Integer.MIN_VALUE, |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentClusterID(cluster), |
| UpgradeUtilities.getCurrentFsscTime(cluster)); |
| |
| UpgradeUtilities.createDataNodeVersionFile(baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| |
| startBlockPoolShouldFail(StartupOption.REGULAR, UpgradeUtilities |
| .getCurrentBlockPoolID(null)); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("DataNode upgrade with newer fsscTime in current", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| baseDirs = UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| storageInfo = new StorageInfo(UpgradeUtilities.getCurrentLayoutVersion(), |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentClusterID(cluster), Long.MAX_VALUE); |
| |
| UpgradeUtilities.createDataNodeVersionFile(baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| // Ensure corresponding block pool failed to initialized |
| startBlockPoolShouldFail(StartupOption.REGULAR, UpgradeUtilities |
| .getCurrentBlockPoolID(null)); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode upgrade with no edits file", numDirs); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| for (File f : baseDirs) { |
| FileUtil.fullyDelete(new File(f,"edits")); |
| } |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode upgrade with no image file", numDirs); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| for (File f : baseDirs) { |
| FileUtil.fullyDelete(new File(f,"fsimage")); |
| } |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode upgrade with corrupt version file", numDirs); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| for (File f : baseDirs) { |
| UpgradeUtilities.corruptFile(new File(f,"VERSION")); |
| } |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode upgrade with old layout version in current", numDirs); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| storageInfo = new StorageInfo(Storage.LAST_UPGRADABLE_LAYOUT_VERSION + 1, |
| UpgradeUtilities.getCurrentNamespaceID(null), |
| UpgradeUtilities.getCurrentClusterID(null), |
| UpgradeUtilities.getCurrentFsscTime(null)); |
| |
| UpgradeUtilities.createNameNodeVersionFile(conf, baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode upgrade with future layout version in current", numDirs); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| storageInfo = new StorageInfo(Integer.MIN_VALUE, |
| UpgradeUtilities.getCurrentNamespaceID(null), |
| UpgradeUtilities.getCurrentClusterID(null), |
| UpgradeUtilities.getCurrentFsscTime(null)); |
| |
| UpgradeUtilities.createNameNodeVersionFile(conf, baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| } // end numDir loop |
| |
| // One more check: normal NN upgrade with 4 directories, concurrent write |
| int numDirs = 4; |
| { |
| conf = new HdfsConfiguration(); |
| conf.setInt(DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOURS_KEY, -1); |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs, conf); |
| String[] nameNodeDirs = conf.getStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY); |
| |
| log("Normal NameNode upgrade", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = createCluster(); |
| checkNameNode(nameNodeDirs); |
| TestParallelImageWrite.checkImages(cluster.getNamesystem(), numDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| } |
| } |
| |
| @Test(expected=IOException.class) |
| public void testUpgradeFromPreUpgradeLVFails() throws IOException { |
| // Upgrade from versions prior to Storage#LAST_UPGRADABLE_LAYOUT_VERSION |
| // is not allowed |
| Storage.checkVersionUpgradable(Storage.LAST_PRE_UPGRADE_LAYOUT_VERSION + 1); |
| fail("Expected IOException is not thrown"); |
| } |
| |
| public void test203LayoutVersion() { |
| for (int lv : Storage.LAYOUT_VERSIONS_203) { |
| assertTrue(Storage.is203LayoutVersion(lv)); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new TestDFSUpgrade().testUpgrade(); |
| } |
| } |
| |
| |
