1 | package org.apache.hadoop.hdfs.server.namenode; |
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2 | |
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3 | import java.io.File; |
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4 | import java.io.IOException; |
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5 | import java.util.Iterator; |
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6 | import java.util.List; |
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7 | import java.util.Random; |
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8 | |
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9 | import junit.framework.TestCase; |
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10 | |
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11 | import org.apache.commons.logging.Log; |
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12 | import org.apache.commons.logging.LogFactory; |
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13 | import org.apache.hadoop.conf.Configuration; |
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14 | import org.apache.hadoop.fs.FSDataOutputStream; |
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15 | import org.apache.hadoop.fs.FileSystem; |
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16 | import org.apache.hadoop.fs.FileUtil; |
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17 | import org.apache.hadoop.fs.Path; |
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18 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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19 | import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption; |
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20 | import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory; |
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21 | import org.apache.hadoop.hdfs.server.namenode.FSImage.NameNodeDirType; |
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22 | import org.apache.hadoop.hdfs.server.namenode.FSImage.NameNodeFile; |
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23 | import org.apache.hadoop.util.StringUtils; |
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24 | |
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25 | /** |
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26 | * Startup and checkpoint tests |
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27 | * |
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28 | */ |
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29 | public class TestStartup extends TestCase { |
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30 | public static final String NAME_NODE_HOST = "localhost:"; |
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31 | public static final String NAME_NODE_HTTP_HOST = "0.0.0.0:"; |
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32 | private static final Log LOG = |
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33 | LogFactory.getLog(TestStartup.class.getName()); |
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34 | private Configuration config; |
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35 | private File hdfsDir=null; |
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36 | static final long seed = 0xAAAAEEFL; |
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37 | static final int blockSize = 4096; |
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38 | static final int fileSize = 8192; |
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39 | private long editsLength=0, fsimageLength=0; |
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40 | |
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41 | |
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42 | private void writeFile(FileSystem fileSys, Path name, int repl) |
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43 | throws IOException { |
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44 | FSDataOutputStream stm = fileSys.create(name, true, |
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45 | fileSys.getConf().getInt("io.file.buffer.size", 4096), |
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46 | (short)repl, (long)blockSize); |
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47 | byte[] buffer = new byte[fileSize]; |
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48 | Random rand = new Random(seed); |
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49 | rand.nextBytes(buffer); |
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50 | stm.write(buffer); |
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51 | stm.close(); |
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52 | } |
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53 | |
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54 | |
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55 | protected void setUp() throws Exception { |
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56 | config = new Configuration(); |
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57 | String baseDir = System.getProperty("test.build.data", "/tmp"); |
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58 | |
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59 | hdfsDir = new File(baseDir, "dfs"); |
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60 | if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) { |
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61 | throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'"); |
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62 | } |
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63 | LOG.info("--hdfsdir is " + hdfsDir.getAbsolutePath()); |
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64 | config.set("dfs.name.dir", new File(hdfsDir, "name").getPath()); |
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65 | config.set("dfs.data.dir", new File(hdfsDir, "data").getPath()); |
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66 | |
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67 | config.set("fs.checkpoint.dir",new File(hdfsDir, "secondary").getPath()); |
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68 | //config.set("fs.default.name", "hdfs://"+ NAME_NODE_HOST + "0"); |
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69 | |
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70 | FileSystem.setDefaultUri(config, "hdfs://"+NAME_NODE_HOST + "0"); |
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71 | } |
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72 | |
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73 | /** |
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74 | * clean up |
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75 | */ |
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76 | public void tearDown() throws Exception { |
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77 | if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) { |
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78 | throw new IOException("Could not delete hdfs directory in tearDown '" + hdfsDir + "'"); |
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79 | } |
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80 | } |
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81 | |
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82 | /** |
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83 | * start MiniDFScluster, create a file (to create edits) and do a checkpoint |
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84 | * @throws IOException |
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85 | */ |
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86 | public void createCheckPoint() throws IOException { |
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87 | LOG.info("--starting mini cluster"); |
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88 | // manage dirs parameter set to false |
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89 | MiniDFSCluster cluster = null; |
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90 | SecondaryNameNode sn = null; |
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91 | |
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92 | try { |
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93 | cluster = new MiniDFSCluster(0, config, 1, true, false, false, null, null, null, null); |
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94 | cluster.waitActive(); |
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95 | |
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96 | LOG.info("--starting Secondary Node"); |
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97 | |
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98 | // start secondary node |
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99 | sn = new SecondaryNameNode(config); |
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100 | assertNotNull(sn); |
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101 | |
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102 | // create a file |
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103 | FileSystem fileSys = cluster.getFileSystem(); |
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104 | Path file1 = new Path("t1"); |
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105 | this.writeFile(fileSys, file1, 1); |
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106 | |
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107 | LOG.info("--doing checkpoint"); |
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108 | sn.doCheckpoint(); // this shouldn't fail |
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109 | LOG.info("--done checkpoint"); |
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110 | } catch (IOException e) { |
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111 | fail(StringUtils.stringifyException(e)); |
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112 | System.err.println("checkpoint failed"); |
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113 | throw e; |
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114 | } finally { |
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115 | if(sn!=null) |
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116 | sn.shutdown(); |
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117 | if(cluster!=null) |
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118 | cluster.shutdown(); |
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119 | LOG.info("--file t1 created, cluster shutdown"); |
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120 | } |
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121 | } |
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122 | |
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123 | /* |
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124 | * corrupt files by removing and recreating the directory |
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125 | */ |
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126 | private void corruptNameNodeFiles() throws IOException { |
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127 | // now corrupt/delete the directrory |
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128 | List<File> nameDirs = (List<File>)FSNamesystem.getNamespaceDirs(config); |
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129 | List<File> nameEditsDirs = (List<File>)FSNamesystem.getNamespaceEditsDirs(config); |
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130 | |
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131 | // get name dir and its length, then delete and recreate the directory |
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132 | File dir = nameDirs.get(0); // has only one |
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133 | this.fsimageLength = new File(new File(dir, "current"), |
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134 | NameNodeFile.IMAGE.getName()).length(); |
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135 | |
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136 | if(dir.exists() && !(FileUtil.fullyDelete(dir))) |
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137 | throw new IOException("Cannot remove directory: " + dir); |
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138 | |
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139 | LOG.info("--removed dir "+dir + ";len was ="+ this.fsimageLength); |
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140 | |
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141 | if (!dir.mkdirs()) |
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142 | throw new IOException("Cannot create directory " + dir); |
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143 | |
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144 | dir = nameEditsDirs.get(0); //has only one |
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145 | |
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146 | this.editsLength = new File(new File(dir, "current"), |
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147 | NameNodeFile.EDITS.getName()).length(); |
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148 | |
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149 | if(dir.exists() && !(FileUtil.fullyDelete(dir))) |
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150 | throw new IOException("Cannot remove directory: " + dir); |
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151 | if (!dir.mkdirs()) |
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152 | throw new IOException("Cannot create directory " + dir); |
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153 | |
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154 | LOG.info("--removed dir and recreated "+dir + ";len was ="+ this.editsLength); |
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155 | |
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156 | |
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157 | } |
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158 | |
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159 | /** |
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160 | * start with -importCheckpoint option and verify that the files are in separate directories and of the right length |
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161 | * @throws IOException |
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162 | */ |
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163 | private void checkNameNodeFiles() throws IOException{ |
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164 | |
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165 | // start namenode with import option |
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166 | LOG.info("-- about to start DFS cluster"); |
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167 | MiniDFSCluster cluster = null; |
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168 | try { |
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169 | cluster = new MiniDFSCluster(0, config, 1, false, false, false, StartupOption.IMPORT, null, null, null); |
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170 | cluster.waitActive(); |
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171 | LOG.info("--NN started with checkpoint option"); |
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172 | NameNode nn = cluster.getNameNode(); |
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173 | assertNotNull(nn); |
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174 | // Verify that image file sizes did not change. |
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175 | FSImage image = nn.getFSImage(); |
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176 | verifyDifferentDirs(image, this.fsimageLength, this.editsLength); |
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177 | } finally { |
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178 | if(cluster != null) |
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179 | cluster.shutdown(); |
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180 | } |
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181 | } |
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182 | |
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183 | /** |
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184 | * verify that edits log and fsimage are in different directories and of a correct size |
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185 | */ |
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186 | private void verifyDifferentDirs(FSImage img, long expectedImgSize, long expectedEditsSize) { |
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187 | StorageDirectory sd =null; |
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188 | for (Iterator<StorageDirectory> it = img.dirIterator(); it.hasNext();) { |
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189 | sd = it.next(); |
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190 | |
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191 | if(sd.getStorageDirType().isOfType(NameNodeDirType.IMAGE)) { |
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192 | File imf = FSImage.getImageFile(sd, NameNodeFile.IMAGE); |
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193 | LOG.info("--image file " + imf.getAbsolutePath() + "; len = " + imf.length() + "; expected = " + expectedImgSize); |
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194 | assertEquals(expectedImgSize, imf.length()); |
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195 | } else if(sd.getStorageDirType().isOfType(NameNodeDirType.EDITS)) { |
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196 | File edf = FSImage.getImageFile(sd, NameNodeFile.EDITS); |
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197 | LOG.info("-- edits file " + edf.getAbsolutePath() + "; len = " + edf.length() + "; expected = " + expectedEditsSize); |
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198 | assertEquals(expectedEditsSize, edf.length()); |
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199 | } else { |
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200 | fail("Image/Edits directories are not different"); |
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201 | } |
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202 | } |
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203 | |
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204 | } |
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205 | /** |
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206 | * secnn-6 |
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207 | * checkpoint for edits and image is the same directory |
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208 | * @throws IOException |
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209 | */ |
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210 | public void testChkpointStartup2() throws IOException{ |
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211 | LOG.info("--starting checkpointStartup2 - same directory for checkpoint"); |
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212 | // different name dirs |
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213 | config.set("dfs.name.dir", new File(hdfsDir, "name").getPath()); |
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214 | config.set("dfs.name.edits.dir", new File(hdfsDir, "edits").getPath()); |
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215 | // same checkpoint dirs |
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216 | config.set("fs.checkpoint.edits.dir", new File(hdfsDir, "chkpt").getPath()); |
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217 | config.set("fs.checkpoint.dir", new File(hdfsDir, "chkpt").getPath()); |
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218 | |
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219 | createCheckPoint(); |
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220 | |
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221 | corruptNameNodeFiles(); |
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222 | checkNameNodeFiles(); |
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223 | |
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224 | } |
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225 | |
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226 | /** |
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227 | * seccn-8 |
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228 | * checkpoint for edits and image are different directories |
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229 | * @throws IOException |
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230 | */ |
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231 | public void testChkpointStartup1() throws IOException{ |
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232 | //setUpConfig(); |
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233 | LOG.info("--starting testStartup Recovery"); |
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234 | // different name dirs |
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235 | config.set("dfs.name.dir", new File(hdfsDir, "name").getPath()); |
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236 | config.set("dfs.name.edits.dir", new File(hdfsDir, "edits").getPath()); |
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237 | // same checkpoint dirs |
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238 | config.set("fs.checkpoint.edits.dir", new File(hdfsDir, "chkpt_edits").getPath()); |
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239 | config.set("fs.checkpoint.dir", new File(hdfsDir, "chkpt").getPath()); |
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240 | |
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241 | createCheckPoint(); |
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242 | corruptNameNodeFiles(); |
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243 | checkNameNodeFiles(); |
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244 | } |
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245 | |
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246 | /** |
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247 | * secnn-7 |
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248 | * secondary node copies fsimage and edits into correct separate directories. |
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249 | * @throws IOException |
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250 | */ |
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251 | public void testSNNStartup() throws IOException{ |
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252 | //setUpConfig(); |
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253 | LOG.info("--starting SecondNN startup test"); |
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254 | // different name dirs |
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255 | config.set("dfs.name.dir", new File(hdfsDir, "name").getPath()); |
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256 | config.set("dfs.name.edits.dir", new File(hdfsDir, "name").getPath()); |
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257 | // same checkpoint dirs |
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258 | config.set("fs.checkpoint.edits.dir", new File(hdfsDir, "chkpt_edits").getPath()); |
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259 | config.set("fs.checkpoint.dir", new File(hdfsDir, "chkpt").getPath()); |
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260 | |
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261 | LOG.info("--starting NN "); |
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262 | MiniDFSCluster cluster = null; |
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263 | SecondaryNameNode sn = null; |
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264 | NameNode nn = null; |
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265 | try { |
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266 | cluster = new MiniDFSCluster(0, config, 1, true, false, false, null, null, null, null); |
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267 | cluster.waitActive(); |
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268 | nn = cluster.getNameNode(); |
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269 | assertNotNull(nn); |
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270 | |
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271 | // start secondary node |
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272 | LOG.info("--starting SecondNN"); |
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273 | sn = new SecondaryNameNode(config); |
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274 | assertNotNull(sn); |
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275 | |
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276 | LOG.info("--doing checkpoint"); |
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277 | sn.doCheckpoint(); // this shouldn't fail |
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278 | LOG.info("--done checkpoint"); |
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279 | |
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280 | |
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281 | |
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282 | // now verify that image and edits are created in the different directories |
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283 | FSImage image = nn.getFSImage(); |
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284 | StorageDirectory sd = image.getStorageDir(0); //only one |
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285 | assertEquals(sd.getStorageDirType(), NameNodeDirType.IMAGE_AND_EDITS); |
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286 | File imf = FSImage.getImageFile(sd, NameNodeFile.IMAGE); |
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287 | File edf = FSImage.getImageFile(sd, NameNodeFile.EDITS); |
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288 | LOG.info("--image file " + imf.getAbsolutePath() + "; len = " + imf.length()); |
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289 | LOG.info("--edits file " + edf.getAbsolutePath() + "; len = " + edf.length()); |
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290 | |
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291 | FSImage chkpImage = sn.getFSImage(); |
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292 | verifyDifferentDirs(chkpImage, imf.length(), edf.length()); |
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293 | |
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294 | } catch (IOException e) { |
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295 | fail(StringUtils.stringifyException(e)); |
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296 | System.err.println("checkpoint failed"); |
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297 | throw e; |
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298 | } finally { |
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299 | if(sn!=null) |
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300 | sn.shutdown(); |
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301 | if(cluster!=null) |
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302 | cluster.shutdown(); |
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303 | } |
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304 | } |
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305 | } |
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