1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.hdfs; |
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19 | |
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20 | import java.io.File; |
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21 | import java.io.IOException; |
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22 | |
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23 | import junit.framework.TestCase; |
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24 | import org.apache.hadoop.conf.Configuration; |
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25 | import org.apache.hadoop.fs.FileSystem; |
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26 | import org.apache.hadoop.fs.FileUtil; |
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27 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
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28 | import org.apache.hadoop.hdfs.server.namenode.NameNode; |
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29 | import org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode; |
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30 | import org.apache.hadoop.ipc.RPC; |
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31 | |
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32 | /** |
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33 | * This test checks correctness of port usage by hdfs components: |
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34 | * NameNode, DataNode, and SecondaryNamenode. |
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35 | * |
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36 | * The correct behavior is:<br> |
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37 | * - when a specific port is provided the server must either start on that port |
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38 | * or fail by throwing {@link java.net.BindException}.<br> |
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39 | * - if the port = 0 (ephemeral) then the server should choose |
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40 | * a free port and start on it. |
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41 | */ |
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42 | public class TestHDFSServerPorts extends TestCase { |
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43 | public static final String NAME_NODE_HOST = "localhost:"; |
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44 | public static final String NAME_NODE_HTTP_HOST = "0.0.0.0:"; |
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45 | |
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46 | Configuration config; |
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47 | File hdfsDir; |
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48 | |
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49 | /** |
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50 | * Start the name-node. |
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51 | */ |
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52 | public NameNode startNameNode() throws IOException { |
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53 | String dataDir = System.getProperty("test.build.data"); |
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54 | hdfsDir = new File(dataDir, "dfs"); |
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55 | if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) { |
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56 | throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'"); |
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57 | } |
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58 | config = new Configuration(); |
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59 | config.set("dfs.name.dir", new File(hdfsDir, "name1").getPath()); |
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60 | FileSystem.setDefaultUri(config, "hdfs://"+NAME_NODE_HOST + "0"); |
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61 | config.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0"); |
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62 | NameNode.format(config); |
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63 | |
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64 | String[] args = new String[] {}; |
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65 | // NameNode will modify config with the ports it bound to |
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66 | return NameNode.createNameNode(args, config); |
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67 | } |
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68 | |
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69 | /** |
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70 | * Start the data-node. |
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71 | */ |
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72 | public DataNode startDataNode(int index, Configuration config) |
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73 | throws IOException { |
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74 | String dataDir = System.getProperty("test.build.data"); |
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75 | File dataNodeDir = new File(dataDir, "data-" + index); |
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76 | config.set("dfs.data.dir", dataNodeDir.getPath()); |
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77 | |
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78 | String[] args = new String[] {}; |
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79 | // NameNode will modify config with the ports it bound to |
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80 | return DataNode.createDataNode(args, config); |
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81 | } |
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82 | |
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83 | /** |
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84 | * Stop the datanode. |
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85 | */ |
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86 | public void stopDataNode(DataNode dn) { |
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87 | if (dn != null) { |
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88 | dn.shutdown(); |
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89 | } |
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90 | } |
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91 | |
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92 | public void stopNameNode(NameNode nn) { |
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93 | if (nn != null) { |
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94 | nn.stop(); |
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95 | } |
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96 | } |
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97 | |
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98 | public Configuration getConfig() { |
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99 | return this.config; |
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100 | } |
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101 | |
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102 | /** |
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103 | * Check whether the name-node can be started. |
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104 | */ |
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105 | private boolean canStartNameNode(Configuration conf) throws IOException { |
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106 | NameNode nn2 = null; |
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107 | try { |
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108 | nn2 = NameNode.createNameNode(new String[]{}, conf); |
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109 | } catch(IOException e) { |
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110 | if (e instanceof java.net.BindException) |
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111 | return false; |
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112 | throw e; |
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113 | } |
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114 | stopNameNode(nn2); |
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115 | return true; |
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116 | } |
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117 | |
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118 | /** |
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119 | * Check whether the data-node can be started. |
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120 | */ |
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121 | private boolean canStartDataNode(Configuration conf) throws IOException { |
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122 | DataNode dn = null; |
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123 | try { |
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124 | dn = DataNode.createDataNode(new String[]{}, conf); |
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125 | } catch(IOException e) { |
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126 | if (e instanceof java.net.BindException) |
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127 | return false; |
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128 | throw e; |
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129 | } |
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130 | dn.shutdown(); |
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131 | return true; |
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132 | } |
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133 | |
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134 | /** |
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135 | * Check whether the secondary name-node can be started. |
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136 | */ |
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137 | private boolean canStartSecondaryNode(Configuration conf) throws IOException { |
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138 | SecondaryNameNode sn = null; |
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139 | try { |
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140 | sn = new SecondaryNameNode(conf); |
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141 | } catch(IOException e) { |
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142 | if (e instanceof java.net.BindException) |
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143 | return false; |
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144 | throw e; |
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145 | } |
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146 | sn.shutdown(); |
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147 | return true; |
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148 | } |
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149 | |
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150 | /** |
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151 | * Verify name-node port usage. |
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152 | */ |
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153 | public void testNameNodePorts() throws Exception { |
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154 | NameNode nn = null; |
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155 | try { |
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156 | nn = startNameNode(); |
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157 | |
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158 | // start another namenode on the same port |
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159 | Configuration conf2 = new Configuration(config); |
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160 | conf2.set("dfs.name.dir", new File(hdfsDir, "name2").getPath()); |
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161 | NameNode.format(conf2); |
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162 | boolean started = canStartNameNode(conf2); |
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163 | assertFalse(started); // should fail |
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164 | |
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165 | // start on a different main port |
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166 | FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0"); |
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167 | started = canStartNameNode(conf2); |
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168 | assertFalse(started); // should fail again |
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169 | |
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170 | // reset conf2 since NameNode modifies it |
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171 | FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0"); |
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172 | // different http port |
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173 | conf2.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0"); |
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174 | started = canStartNameNode(conf2); |
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175 | assertTrue(started); // should start now |
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176 | } finally { |
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177 | stopNameNode(nn); |
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178 | } |
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179 | } |
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180 | |
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181 | /** |
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182 | * Verify data-node port usage. |
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183 | */ |
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184 | public void testDataNodePorts() throws Exception { |
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185 | NameNode nn = null; |
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186 | try { |
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187 | nn = startNameNode(); |
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188 | |
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189 | // start data-node on the same port as name-node |
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190 | Configuration conf2 = new Configuration(config); |
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191 | conf2.set("dfs.data.dir", new File(hdfsDir, "data").getPath()); |
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192 | conf2.set("dfs.datanode.address", |
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193 | FileSystem.getDefaultUri(config).getAuthority()); |
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194 | conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0"); |
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195 | boolean started = canStartDataNode(conf2); |
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196 | assertFalse(started); // should fail |
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197 | |
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198 | // bind http server to the same port as name-node |
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199 | conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0"); |
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200 | conf2.set("dfs.datanode.http.address", |
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201 | config.get("dfs.http.address")); |
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202 | started = canStartDataNode(conf2); |
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203 | assertFalse(started); // should fail |
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204 | |
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205 | // both ports are different from the name-node ones |
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206 | conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0"); |
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207 | conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0"); |
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208 | conf2.set("dfs.datanode.ipc.address", NAME_NODE_HOST + "0"); |
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209 | started = canStartDataNode(conf2); |
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210 | assertTrue(started); // should start now |
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211 | } finally { |
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212 | stopNameNode(nn); |
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213 | } |
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214 | } |
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215 | |
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216 | /** |
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217 | * Verify secondary name-node port usage. |
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218 | */ |
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219 | public void testSecondaryNodePorts() throws Exception { |
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220 | NameNode nn = null; |
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221 | try { |
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222 | nn = startNameNode(); |
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223 | |
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224 | // bind http server to the same port as name-node |
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225 | Configuration conf2 = new Configuration(config); |
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226 | conf2.set("dfs.secondary.http.address", |
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227 | config.get("dfs.http.address")); |
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228 | SecondaryNameNode.LOG.info("= Starting 1 on: " + |
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229 | conf2.get("dfs.secondary.http.address")); |
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230 | boolean started = canStartSecondaryNode(conf2); |
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231 | assertFalse(started); // should fail |
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232 | |
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233 | // bind http server to a different port |
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234 | conf2.set("dfs.secondary.http.address", NAME_NODE_HTTP_HOST + "0"); |
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235 | SecondaryNameNode.LOG.info("= Starting 2 on: " + |
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236 | conf2.get("dfs.secondary.http.address")); |
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237 | started = canStartSecondaryNode(conf2); |
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238 | assertTrue(started); // should start now |
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239 | } finally { |
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240 | stopNameNode(nn); |
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241 | } |
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242 | } |
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243 | } |
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