001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import java.util.ArrayList;
021import java.util.List;
022import java.util.stream.Collectors;
023import java.util.stream.IntStream;
024import org.apache.hadoop.hbase.HBaseTestingUtil;
025import org.apache.hadoop.hbase.ServerName;
026import org.apache.hadoop.hbase.SingleProcessHBaseCluster;
027import org.apache.hadoop.hbase.TableName;
028import org.apache.hadoop.hbase.client.Admin;
029import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
030import org.apache.hadoop.hbase.client.Put;
031import org.apache.hadoop.hbase.client.Table;
032import org.apache.hadoop.hbase.client.TableDescriptor;
033import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
034import org.apache.hadoop.hbase.master.RackManager;
035import org.apache.hadoop.hbase.regionserver.HRegion;
036import org.apache.hadoop.hbase.regionserver.HRegionServer;
037import org.apache.hadoop.hbase.testclassification.LargeTests;
038import org.apache.hadoop.hbase.testclassification.MiscTests;
039import org.junit.jupiter.api.AfterAll;
040import org.junit.jupiter.api.Assertions;
041import org.junit.jupiter.api.BeforeAll;
042import org.junit.jupiter.api.BeforeEach;
043import org.junit.jupiter.api.Tag;
044import org.junit.jupiter.api.Test;
045import org.junit.jupiter.api.TestInfo;
046
047@Tag(MiscTests.TAG)
048@Tag(LargeTests.TAG)
049public class TestRegionMover3 {
050
051  private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
052  private static ServerName rs0;
053  private static ServerName rs1;
054  private static ServerName rs2;
055
056  @BeforeAll
057  public static void setUpBeforeClass() throws Exception {
058    TEST_UTIL.startMiniCluster(3);
059    SingleProcessHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
060    rs0 = cluster.getRegionServer(0).getServerName();
061    rs1 = cluster.getRegionServer(1).getServerName();
062    rs2 = cluster.getRegionServer(2).getServerName();
063    TEST_UTIL.getAdmin().balancerSwitch(false, true);
064  }
065
066  @AfterAll
067  public static void tearDownAfterClass() throws Exception {
068    TEST_UTIL.shutdownMiniCluster();
069  }
070
071  @BeforeEach
072  public void setUp(TestInfo testInfo) throws Exception {
073    final TableName tableName = TableName.valueOf(testInfo.getTestMethod().get().getName());
074    TableDescriptor tableDesc = TableDescriptorBuilder.newBuilder(tableName)
075      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("fam1")).build();
076    int startKey = 0;
077    int endKey = 80000;
078    TEST_UTIL.getAdmin().createTable(tableDesc, Bytes.toBytes(startKey), Bytes.toBytes(endKey), 9);
079  }
080
081  @Test
082  public void testRegionUnloadWithRack(TestInfo testInfo) throws Exception {
083    final TableName tableName = TableName.valueOf(testInfo.getTestMethod().get().getName());
084    SingleProcessHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
085    Admin admin = TEST_UTIL.getAdmin();
086    Table table = TEST_UTIL.getConnection().getTable(tableName);
087    List<Put> puts = IntStream.range(10, 50000).mapToObj(i -> new Put(Bytes.toBytes(i))
088      .addColumn(Bytes.toBytes("fam1"), Bytes.toBytes("q1"), Bytes.toBytes("val_" + i)))
089      .collect(Collectors.toList());
090    table.put(puts);
091    admin.flush(tableName);
092    admin.compact(tableName);
093    Thread.sleep(3000);
094    HRegionServer hRegionServer0 = cluster.getRegionServer(0);
095    HRegionServer hRegionServer1 = cluster.getRegionServer(1);
096    HRegionServer hRegionServer2 = cluster.getRegionServer(2);
097    int numRegions0 = hRegionServer0.getNumberOfOnlineRegions();
098    int numRegions1 = hRegionServer1.getNumberOfOnlineRegions();
099    int numRegions2 = hRegionServer2.getNumberOfOnlineRegions();
100
101    Assertions.assertTrue(numRegions0 >= 3);
102    Assertions.assertTrue(numRegions1 >= 3);
103    Assertions.assertTrue(numRegions2 >= 3);
104    int totalRegions = numRegions0 + numRegions1 + numRegions2;
105
106    // source RS: rs0
107    String sourceRSName = rs0.getAddress().toString();
108
109    // move all regions from rs1 to rs0
110    for (HRegion region : hRegionServer1.getRegions()) {
111      TEST_UTIL.getAdmin().move(region.getRegionInfo().getEncodedNameAsBytes(), rs0);
112    }
113    TEST_UTIL.waitFor(5000, () -> {
114      int newNumRegions0 = hRegionServer0.getNumberOfOnlineRegions();
115      int newNumRegions1 = hRegionServer1.getNumberOfOnlineRegions();
116      return newNumRegions1 == 0 && newNumRegions0 == (numRegions0 + numRegions1);
117    });
118
119    // regionMover obj on rs0. While unloading regions from rs0
120    // with default rackManager, which resolves "/default-rack" for each server, no region
121    // is moved while using unloadFromRack() as all rs belong to same rack.
122    RegionMover.RegionMoverBuilder rmBuilder =
123      new RegionMover.RegionMoverBuilder(sourceRSName, TEST_UTIL.getConfiguration()).ack(true)
124        .maxthreads(8);
125    try (RegionMover regionMover = rmBuilder.build()) {
126      regionMover.unloadFromRack();
127      int newNumRegions0 = hRegionServer0.getNumberOfOnlineRegions();
128      int newNumRegions1 = hRegionServer1.getNumberOfOnlineRegions();
129      int newNumRegions2 = hRegionServer2.getNumberOfOnlineRegions();
130      Assertions.assertEquals(0, newNumRegions1);
131      Assertions.assertEquals(totalRegions, newNumRegions0 + newNumRegions2);
132    }
133
134    // use custom rackManager, which resolves "rack-1" for rs0 and rs1,
135    // while "rack-2" for rs2. Hence, unloadFromRack() from rs0 should move all
136    // regions that belong to rs0 to rs2 only, and nothing should be moved to rs1
137    // as rs0 and rs1 belong to same rack.
138    rmBuilder.rackManager(new MockRackManager());
139    try (RegionMover regionMover = rmBuilder.build()) {
140      regionMover.unloadFromRack();
141      int newNumRegions0 = hRegionServer0.getNumberOfOnlineRegions();
142      int newNumRegions1 = hRegionServer1.getNumberOfOnlineRegions();
143      int newNumRegions2 = hRegionServer2.getNumberOfOnlineRegions();
144      Assertions.assertEquals(0, newNumRegions0);
145      Assertions.assertEquals(0, newNumRegions1);
146      Assertions.assertEquals(totalRegions, newNumRegions2);
147    }
148
149  }
150
151  private static class MockRackManager extends RackManager {
152
153    private static final String RACK_2 = "rack-2";
154    private static final String RACK_1 = "rack-1";
155
156    @Override
157    public String getRack(ServerName server) {
158      return rs2.equals(server) ? RACK_2 : RACK_1;
159    }
160
161    @Override
162    public List<String> getRack(List<ServerName> servers) {
163      List<String> racks = new ArrayList<>();
164      servers.forEach(serverName -> {
165        if (rs2.equals(serverName)) {
166          racks.add(RACK_2);
167        } else {
168          racks.add(RACK_1);
169        }
170      });
171      return racks;
172    }
173  }
174
175}