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.regionserver;
019
020import java.io.IOException;
021import org.apache.commons.lang3.StringUtils;
022import org.apache.hadoop.conf.Configuration;
023import org.apache.hadoop.fs.Path;
024import org.apache.hadoop.hbase.HBaseClassTestRule;
025import org.apache.hadoop.hbase.HBaseTestingUtility;
026import org.apache.hadoop.hbase.TableName;
027import org.apache.hadoop.hbase.client.RegionInfo;
028import org.apache.hadoop.hbase.client.Table;
029import org.apache.hadoop.hbase.testclassification.MediumTests;
030import org.apache.hadoop.hbase.testclassification.RegionServerTests;
031import org.apache.hadoop.hbase.util.Bytes;
032import org.apache.hadoop.hbase.util.CommonFSUtils;
033import org.apache.hadoop.hdfs.DFSClient;
034import org.junit.After;
035import org.junit.Assert;
036import org.junit.Before;
037import org.junit.ClassRule;
038import org.junit.Test;
039import org.junit.experimental.categories.Category;
040
041@Category({ RegionServerTests.class, MediumTests.class })
042public class TestHdfsSnapshotHRegion {
043
044  @ClassRule
045  public static final HBaseClassTestRule CLASS_RULE =
046    HBaseClassTestRule.forClass(TestHdfsSnapshotHRegion.class);
047
048  private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
049  private static final String SNAPSHOT_NAME = "foo_snapshot";
050  private Table table;
051  public static final TableName TABLE_NAME = TableName.valueOf("foo");
052  public static final byte[] FAMILY = Bytes.toBytes("f1");
053  private DFSClient client;
054  private String baseDir;
055
056  @Before
057  public void setUp() throws Exception {
058    Configuration c = TEST_UTIL.getConfiguration();
059    c.setBoolean("dfs.support.append", true);
060    TEST_UTIL.startMiniCluster(1);
061    table = TEST_UTIL.createMultiRegionTable(TABLE_NAME, FAMILY);
062    TEST_UTIL.loadTable(table, FAMILY);
063
064    // setup the hdfssnapshots
065    client = new DFSClient(TEST_UTIL.getDFSCluster().getURI(), TEST_UTIL.getConfiguration());
066    String fullUrIPath = TEST_UTIL.getDefaultRootDirPath().toString();
067    String uriString = TEST_UTIL.getTestFileSystem().getUri().toString();
068    baseDir = StringUtils.removeStart(fullUrIPath, uriString);
069    client.allowSnapshot(baseDir);
070  }
071
072  @After
073  public void tearDown() throws Exception {
074    client.deleteSnapshot(baseDir, SNAPSHOT_NAME);
075    TEST_UTIL.shutdownMiniCluster();
076  }
077
078  @Test
079  public void testOpeningReadOnlyRegionBasic() throws Exception {
080    String snapshotDir = client.createSnapshot(baseDir, SNAPSHOT_NAME);
081    RegionInfo firstRegion = TEST_UTIL.getConnection().getRegionLocator(table.getName())
082      .getAllRegionLocations().stream().findFirst().get().getRegion();
083    Path tableDir = CommonFSUtils.getTableDir(new Path(snapshotDir), TABLE_NAME);
084    HRegion snapshottedRegion = openSnapshotRegion(firstRegion, tableDir);
085    Assert.assertNotNull(snapshottedRegion);
086    snapshottedRegion.close();
087  }
088
089  @Test
090  public void testSnapshottingWithTmpSplitsAndMergeDirectoriesPresent() throws Exception {
091    // lets get a region and create those directories and make sure we ignore them
092    RegionInfo firstRegion = TEST_UTIL.getConnection().getRegionLocator(table.getName())
093      .getAllRegionLocations().stream().findFirst().get().getRegion();
094    String encodedName = firstRegion.getEncodedName();
095    Path tableDir = CommonFSUtils.getTableDir(TEST_UTIL.getDefaultRootDirPath(), TABLE_NAME);
096    Path regionDirectoryPath = new Path(tableDir, encodedName);
097    TEST_UTIL.getTestFileSystem()
098      .create(new Path(regionDirectoryPath, HRegionFileSystem.REGION_TEMP_DIR));
099    TEST_UTIL.getTestFileSystem()
100      .create(new Path(regionDirectoryPath, HRegionFileSystem.REGION_SPLITS_DIR));
101    TEST_UTIL.getTestFileSystem()
102      .create(new Path(regionDirectoryPath, HRegionFileSystem.REGION_MERGES_DIR));
103    // now snapshot
104    String snapshotDir = client.createSnapshot(baseDir, "foo_snapshot");
105    // everything should still open just fine
106    HRegion snapshottedRegion =
107      openSnapshotRegion(firstRegion, CommonFSUtils.getTableDir(new Path(snapshotDir), TABLE_NAME));
108    Assert.assertNotNull(snapshottedRegion); // no errors and the region should open
109    snapshottedRegion.close();
110  }
111
112  private HRegion openSnapshotRegion(RegionInfo firstRegion, Path tableDir) throws IOException {
113    return HRegion.openReadOnlyFileSystemHRegion(TEST_UTIL.getConfiguration(),
114      TEST_UTIL.getTestFileSystem(), tableDir, firstRegion, table.getDescriptor());
115  }
116}