[RSGroup] Forward-port HBASE-22658 to master branch and branch-2.x (#1326)

Signed-off-by: stack <stack@apache.org>

hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionMover.java

@@ -31,6 +31,7 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.Iterator;
@@ -60,6 +61,8 @@ import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
+import org.apache.hadoop.hbase.net.Address;
+import org.apache.hadoop.hbase.rsgroup.RSGroupInfo;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -416,7 +419,9 @@ public class RegionMover extends AbstractHBaseTool implements Closeable {
       try {
         // Get Online RegionServers
         List<ServerName> regionServers = new ArrayList<>();
-        regionServers.addAll(admin.getRegionServers());
+        RSGroupInfo rsgroup = admin.getRSGroup(Address.fromParts(hostname, port));
+        LOG.info("{} belongs to {}", hostname, rsgroup.getName());
+        regionServers.addAll(filterRSGroupServers(rsgroup, admin.getRegionServers()));
         // Remove the host Region server from target Region Servers list
         ServerName server = stripServer(regionServers, hostname, port);
         if (server == null) {
@@ -431,6 +436,8 @@ public class RegionMover extends AbstractHBaseTool implements Closeable {
         if (regionServers.isEmpty()) {
           LOG.warn("No Regions were moved - no servers available");
           return false;
+        } else {
+          LOG.info("Available servers {}", regionServers);
         }
         unloadRegions(server, regionServers, movedRegions);
       } catch (Exception e) {
@@ -446,6 +453,22 @@ public class RegionMover extends AbstractHBaseTool implements Closeable {
     return waitTaskToFinish(unloadPool, unloadTask, "unloading");
   }
 
+  @VisibleForTesting
+   Collection<ServerName> filterRSGroupServers(RSGroupInfo rsgroup,
+      Collection<ServerName> onlineServers) {
+    if (rsgroup.getName().equals(RSGroupInfo.DEFAULT_GROUP)) {
+      return onlineServers;
+    }
+    List<ServerName> serverLists = new ArrayList<>(rsgroup.getServers().size());
+    for (ServerName server : onlineServers) {
+      Address address = Address.fromParts(server.getHostname(), server.getPort());
+      if (rsgroup.containsServer(address)) {
+        serverLists.add(server);
+      }
+    }
+    return serverLists;
+  }
+
   private void unloadRegions(ServerName server, List<ServerName> regionServers,
       List<RegionInfo> movedRegions) throws Exception {
     while (true) {

hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMoverWithRSGroupEnable.java

@@ -0,0 +1,136 @@
+/**
+ * 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.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Admin;
+import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
+import org.apache.hadoop.hbase.client.TableDescriptor;
+import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
+import org.apache.hadoop.hbase.net.Address;
+import org.apache.hadoop.hbase.regionserver.HRegionServer;
+import org.apache.hadoop.hbase.rsgroup.RSGroupInfo;
+import org.apache.hadoop.hbase.rsgroup.RSGroupUtil;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.testclassification.MiscTests;
+import org.apache.hadoop.hbase.util.RegionMover.RegionMoverBuilder;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Test for rsgroup enable, unloaded regions from decommissoned host of a rsgroup
+ * should be assigned to those regionservers belonging to the same rsgroup.
+ */
+@Category({ MiscTests.class, MediumTests.class })
+public class TestRegionMoverWithRSGroupEnable {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestRegionMoverWithRSGroupEnable.class);
+
+  private static final Logger LOG = LoggerFactory.getLogger(TestRegionMoverWithRSGroupEnable.class);
+  private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
+  private static final String TEST_RSGROUP = "test";
+
+
+  @BeforeClass
+  public static void setUpBeforeClass() throws Exception {
+    RSGroupUtil.enableRSGroup(TEST_UTIL.getConfiguration());
+    TEST_UTIL.startMiniCluster(5);
+  }
+
+  @AfterClass
+  public static void tearDownAfterClass() throws Exception {
+    TEST_UTIL.shutdownMiniCluster();
+  }
+
+  private final List<Address> rsservers = new ArrayList<>(2);
+
+  @Before
+  public void setUp() throws Exception {
+    Admin admin = TEST_UTIL.getAdmin();
+
+    // Add a new rsgroup and assign two servers to it.
+    admin.addRSGroup(TEST_RSGROUP);
+    Collection<ServerName> allServers = admin.getRegionServers();
+    // Remove rs contains hbase:meta, otherwise test looks unstable and buggy in test env.
+    ServerName rsContainMeta = TEST_UTIL.getMiniHBaseCluster().getRegionServerThreads().stream()
+      .map(t -> t.getRegionServer())
+      .filter(rs -> rs.getRegions(TableName.META_TABLE_NAME).size() > 0).findFirst().get()
+      .getServerName();
+    LOG.info("{} contains hbase:meta", rsContainMeta);
+    List<ServerName> modifiable = new ArrayList<>(allServers);
+    modifiable.remove(rsContainMeta);
+    int i = 0;
+    for (ServerName server : modifiable) {
+      if (i == 2) break;
+      rsservers.add(Address.fromParts(server.getHostname(), server.getPort()));
+      i++;
+    }
+    admin.moveServersToRSGroup(new HashSet<>(rsservers), TEST_RSGROUP);
+    LOG.info("Servers in {} are {}", TEST_RSGROUP, rsservers);
+    assertEquals(3, admin.getRSGroup(RSGroupInfo.DEFAULT_GROUP).getServers().size());
+    assertEquals(2, admin.getRSGroup(TEST_RSGROUP).getServers().size());
+
+    // Create a pre-split table in test rsgroup
+    TableName tableName = TableName.valueOf("testRegionMoverWithRSGroupEnable");
+    if (admin.tableExists(tableName)) {
+      TEST_UTIL.deleteTable(tableName);
+    }
+    TableDescriptor tableDesc = TableDescriptorBuilder.newBuilder(tableName)
+      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("f"))
+      .setRegionServerGroup(TEST_RSGROUP)
+      .build();
+    String startKey = "a";
+    String endKey = "z";
+    admin.createTable(tableDesc, Bytes.toBytes(startKey), Bytes.toBytes(endKey), 9);
+  }
+
+  @Test
+  public void testUnloadRegions() throws Exception {
+    Address decommission = rsservers.get(0);
+    Address online = rsservers.get(1);
+    String filename = new Path(TEST_UTIL.getDataTestDir(), "testRSGroupUnload").toString();
+    RegionMoverBuilder builder =
+      new RegionMoverBuilder(decommission.toString(), TEST_UTIL.getConfiguration());
+    try (RegionMover rm = builder.filename(filename).ack(true).build()) {
+      LOG.info("Unloading " + decommission.getHostname());
+      rm.unload();
+    }
+    HRegionServer onlineRS = TEST_UTIL.getMiniHBaseCluster().getRegionServerThreads().stream()
+      .map(JVMClusterUtil.RegionServerThread::getRegionServer)
+      .filter(rs -> rs.getServerName().getAddress().equals(online)).findFirst().get();
+    assertEquals(9, onlineRS.getNumberOfOnlineRegions());
+  }
+
+}