| /** |
| * 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.namenode; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.function.Supplier; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.protocol.DatanodeAdminProperties; |
| import org.apache.hadoop.hdfs.protocol.DatanodeID; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlock; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlocks; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyWithUpgradeDomain; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementStatus; |
| import org.apache.hadoop.hdfs.server.blockmanagement.CombinedHostFileManager; |
| import org.apache.hadoop.hdfs.server.blockmanagement.HostConfigManager; |
| import org.apache.hadoop.hdfs.util.HostsFileWriter; |
| import org.apache.hadoop.net.StaticMapping; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * End-to-end test case for upgrade domain |
| * The test configs upgrade domain for nodes via admin json |
| * config file and put some nodes to decommission state. |
| * The test then verifies replicas are placed on the nodes that |
| * satisfy the upgrade domain policy. |
| * |
| */ |
| public class TestUpgradeDomainBlockPlacementPolicy { |
| |
| private static final short REPLICATION_FACTOR = (short) 3; |
| private static final int DEFAULT_BLOCK_SIZE = 1024; |
| private static final int WAIT_TIMEOUT_MS = 60000; |
| private static final long FILE_SIZE = DEFAULT_BLOCK_SIZE * 5; |
| static final String[] racks = |
| { "/RACK1", "/RACK1", "/RACK1", "/RACK2", "/RACK2", "/RACK2" }; |
| static final String[] hosts = |
| {"host1", "host2", "host3", "host4", "host5", "host6"}; |
| static final String[] upgradeDomains = |
| {"ud5", "ud2", "ud3", "ud1", "ud2", "ud4"}; |
| static final Set<DatanodeID> expectedDatanodeIDs = new HashSet<>(); |
| private MiniDFSCluster cluster = null; |
| private HostsFileWriter hostsFileWriter = new HostsFileWriter(); |
| private Configuration conf = new HdfsConfiguration(); |
| |
| @Before |
| public void setup() throws IOException { |
| StaticMapping.resetMap(); |
| conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, DEFAULT_BLOCK_SIZE); |
| conf.setInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, DEFAULT_BLOCK_SIZE / 2); |
| conf.setClass(DFSConfigKeys.DFS_BLOCK_REPLICATOR_CLASSNAME_KEY, |
| BlockPlacementPolicyWithUpgradeDomain.class, |
| BlockPlacementPolicy.class); |
| conf.setClass(DFSConfigKeys.DFS_NAMENODE_HOSTS_PROVIDER_CLASSNAME_KEY, |
| CombinedHostFileManager.class, HostConfigManager.class); |
| hostsFileWriter.initialize(conf, "temp/upgradedomainpolicy"); |
| |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(6).racks(racks) |
| .hosts(hosts).build(); |
| cluster.waitActive(); |
| refreshDatanodeAdminProperties(); |
| } |
| |
| @After |
| public void teardown() throws IOException { |
| hostsFileWriter.cleanup(); |
| if (cluster != null) { |
| cluster.shutdown(); |
| cluster = null; |
| } |
| } |
| |
| /** |
| * Define admin properties for these datanodes as follows. |
| * dn0's upgrade domain is ud5. |
| * dn1's upgrade domain is ud2. |
| * dn2's upgrade domain is ud3. |
| * dn3's upgrade domain is ud1. |
| * dn4's upgrade domain is ud2. |
| * dn5's upgrade domain is ud4. |
| * dn0 and dn5 are decommissioned. |
| * Given dn0, dn1 and dn2 are on rack1 and dn3, dn4 and dn5 are on |
| * rack2. Then any block's replicas should be on either |
| * {dn1, dn2, d3} or {dn2, dn3, dn4}. |
| */ |
| private void refreshDatanodeAdminProperties() |
| throws IOException { |
| DatanodeAdminProperties[] datanodes = new DatanodeAdminProperties[ |
| hosts.length]; |
| for (int i = 0; i < hosts.length; i++) { |
| datanodes[i] = new DatanodeAdminProperties(); |
| DatanodeID datanodeID = cluster.getDataNodes().get(i).getDatanodeId(); |
| /* |
| * Use host names that can be resolved ( |
| * InetSocketAddress#isUnresolved == false). Otherwise, |
| * CombinedHostFileManager won't allow those hosts. |
| */ |
| datanodes[i].setHostName(datanodeID.getIpAddr()); |
| datanodes[i].setPort(datanodeID.getXferPort()); |
| datanodes[i].setUpgradeDomain(upgradeDomains[i]); |
| } |
| datanodes[0].setAdminState(DatanodeInfo.AdminStates.DECOMMISSIONED); |
| datanodes[5].setAdminState(DatanodeInfo.AdminStates.DECOMMISSIONED); |
| hostsFileWriter.initIncludeHosts(datanodes); |
| cluster.getNamesystem(0).getBlockManager().getDatanodeManager().refreshNodes(conf); |
| |
| expectedDatanodeIDs.clear(); |
| expectedDatanodeIDs.add(cluster.getDataNodes().get(2).getDatanodeId()); |
| expectedDatanodeIDs.add(cluster.getDataNodes().get(3).getDatanodeId()); |
| } |
| |
| /** |
| * Define admin properties for these datanodes as follows. |
| * dn0's upgrade domain is ud5. |
| * dn1's upgrade domain is ud2. |
| * dn2's upgrade domain is ud3. |
| * dn3's upgrade domain is ud1. |
| * dn4's upgrade domain is ud2. |
| * dn5's upgrade domain is ud4. |
| * dn2 and dn3 are decommissioned. |
| * Given dn0, dn1 and dn2 are on rack1 and dn3, dn4 and dn5 are on |
| * rack2. Then any block's replicas should be on either |
| * {dn0, dn1, d5} or {dn0, dn4, dn5}. |
| */ |
| private void refreshDatanodeAdminProperties2() |
| throws IOException { |
| DatanodeAdminProperties[] datanodes = new DatanodeAdminProperties[ |
| hosts.length]; |
| for (int i = 0; i < hosts.length; i++) { |
| datanodes[i] = new DatanodeAdminProperties(); |
| DatanodeID datanodeID = cluster.getDataNodes().get(i).getDatanodeId(); |
| /* |
| * Use host names that can be resolved ( |
| * InetSocketAddress#isUnresolved == false). Otherwise, |
| * CombinedHostFileManager won't allow those hosts. |
| */ |
| datanodes[i].setHostName(datanodeID.getIpAddr()); |
| datanodes[i].setPort(datanodeID.getXferPort()); |
| datanodes[i].setUpgradeDomain(upgradeDomains[i]); |
| } |
| datanodes[2].setAdminState(DatanodeInfo.AdminStates.DECOMMISSIONED); |
| datanodes[3].setAdminState(DatanodeInfo.AdminStates.DECOMMISSIONED); |
| hostsFileWriter.initIncludeHosts(datanodes); |
| cluster.getNamesystem(0).getBlockManager().getDatanodeManager().refreshNodes(conf); |
| |
| expectedDatanodeIDs.clear(); |
| expectedDatanodeIDs.add(cluster.getDataNodes().get(0).getDatanodeId()); |
| expectedDatanodeIDs.add(cluster.getDataNodes().get(5).getDatanodeId()); |
| } |
| |
| private void createFileAndWaitForReplication(final Path path, |
| final long fileLen) |
| throws Exception { |
| DFSTestUtil.createFile(cluster.getFileSystem(), path, fileLen, |
| REPLICATION_FACTOR, 1000L); |
| DFSTestUtil.waitForReplication(cluster.getFileSystem(), path, |
| REPLICATION_FACTOR, WAIT_TIMEOUT_MS); |
| } |
| |
| @Test |
| public void testPlacement() throws Exception { |
| final long fileSize = FILE_SIZE; |
| final String testFile = "/testfile"; |
| final Path path = new Path(testFile); |
| createFileAndWaitForReplication(path, FILE_SIZE); |
| LocatedBlocks locatedBlocks = |
| cluster.getFileSystem().getClient().getLocatedBlocks( |
| path.toString(), 0, fileSize); |
| for (LocatedBlock block : locatedBlocks.getLocatedBlocks()) { |
| Set<DatanodeInfo> locs = new HashSet<>(); |
| for(DatanodeInfo datanodeInfo : block.getLocations()) { |
| if (datanodeInfo.getAdminState() |
| .equals(DatanodeInfo.AdminStates.NORMAL)) { |
| locs.add(datanodeInfo); |
| } |
| } |
| for (DatanodeID datanodeID : expectedDatanodeIDs) { |
| Assert.assertTrue(locs.contains(datanodeID)); |
| } |
| } |
| } |
| |
| @Test(timeout = 300000) |
| public void testPlacementAfterDecommission() throws Exception { |
| final long fileSize = FILE_SIZE; |
| final String testFile = "/testfile-afterdecomm"; |
| final Path path = new Path(testFile); |
| createFileAndWaitForReplication(path, fileSize); |
| |
| // Decommission some nodes and wait until decommissions have finished. |
| refreshDatanodeAdminProperties2(); |
| |
| GenericTestUtils.waitFor(new Supplier<Boolean>() { |
| @Override |
| public Boolean get() { |
| LocatedBlocks locatedBlocks; |
| try { |
| locatedBlocks = |
| cluster.getFileSystem().getClient().getLocatedBlocks( |
| path.toString(), 0, fileSize); |
| } catch (IOException ioe) { |
| return false; |
| } |
| for (LocatedBlock block : locatedBlocks.getLocatedBlocks()) { |
| Set<DatanodeInfo> locs = new HashSet<>(); |
| for (DatanodeInfo datanodeInfo : block.getLocations()) { |
| if (datanodeInfo.getAdminState().equals( |
| DatanodeInfo.AdminStates.NORMAL)) { |
| locs.add(datanodeInfo); |
| } |
| } |
| for (DatanodeID datanodeID : expectedDatanodeIDs) { |
| if (!locs.contains(datanodeID)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| }, 1000, WAIT_TIMEOUT_MS); |
| |
| // Verify block placement policy of each block. |
| LocatedBlocks locatedBlocks = |
| cluster.getFileSystem().getClient().getLocatedBlocks( |
| path.toString(), 0, fileSize); |
| for (LocatedBlock block : locatedBlocks.getLocatedBlocks()) { |
| BlockPlacementStatus status = |
| cluster.getNamesystem().getBlockManager() |
| .getBlockPlacementPolicy() |
| .verifyBlockPlacement(block.getLocations(), REPLICATION_FACTOR); |
| Assert.assertTrue(status.isPlacementPolicySatisfied()); |
| } |
| } |
| } |
