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<p><code>pull-deps</code> is an Apache Druid tool that can pull down dependencies to the local repository and lay dependencies out into the extension directory as needed.</p>
<p><code>pull-deps</code> has several command line options, they are as follows:</p>
<p><code>-c</code> or <code>--coordinate</code> (Can be specified multiply times)</p>
<p>Extension coordinate to pull down, followed by a maven coordinate, e.g. org.apache.druid.extensions:mysql-metadata-storage</p>
<p><code>-h</code> or <code>--hadoop-coordinate</code> (Can be specified multiply times)</p>
<p>Apache Hadoop dependency to pull down, followed by a maven coordinate, e.g. org.apache.hadoop:hadoop-client:2.4.0</p>
<p><code>--no-default-hadoop</code></p>
<p>Don't pull down the default hadoop coordinate, i.e., org.apache.hadoop:hadoop-client:2.3.0. If <code>-h</code> option is supplied, then default hadoop coordinate will not be downloaded.</p>
<p><code>--clean</code></p>
<p>Remove existing extension and hadoop dependencies directories before pulling down dependencies.</p>
<p><code>-l</code> or <code>--localRepository</code></p>
<p>A local repository that Maven will use to put downloaded files. Then pull-deps will lay these files out into the extensions directory as needed.</p>
<p><code>-r</code> or <code>--remoteRepository</code></p>
<p>Add a remote repository. Unless --no-default-remote-repositories is provided, these will be used after <a href="https://repo1.maven.org/maven2/">https://repo1.maven.org/maven2/</a> and <a href="https://metamx.artifactoryonline.com/metamx/pub-libs-releases-local">https://metamx.artifactoryonline.com/metamx/pub-libs-releases-local</a></p>
<p><code>--no-default-remote-repositories</code></p>
<p>Don't use the default remote repositories, only use the repositories provided directly via --remoteRepository.</p>
<p><code>-d</code> or <code>--defaultVersion</code></p>
<p>Version to use for extension coordinate that doesn't have a version information. For example, if extension coordinate is <code>org.apache.druid.extensions:mysql-metadata-storage</code>, and default version is <code>0.17.1</code>, then this coordinate will be treated as <code>org.apache.druid.extensions:mysql-metadata-storage:0.17.1</code></p>
<p><code>--use-proxy</code></p>
<p>Use http/https proxy to send request to the remote repository servers. <code>--proxy-host</code> and <code>--proxy-port</code> must be set explicitly if this option is enabled.</p>
<p><code>--proxy-type</code></p>
<p>Set the proxy type, Should be either <em>http</em> or <em>https</em>, default value is <em>https</em>.</p>
<p><code>--proxy-host</code></p>
<p>Set the proxy host. e.g. proxy.com.</p>
<p><code>--proxy-port</code></p>
<p>Set the proxy port number. e.g. 8080.</p>
<p><code>--proxy-username</code></p>
<p>Set a username to connect to the proxy, this option is only required if the proxy server uses authentication.</p>
<p><code>--proxy-password</code></p>
<p>Set a password to connect to the proxy, this option is only required if the proxy server uses authentication.</p>
<p>To run <code>pull-deps</code>, you should</p>
<ol>
<li><p>Specify <code>druid.extensions.directory</code> and <code>druid.extensions.hadoopDependenciesDir</code>, these two properties tell <code>pull-deps</code> where to put extensions. If you don't specify them,  default values will be used, see <a href="/docs/latest/configuration/index.html">Configuration</a>.</p></li>
<li><p>Tell <code>pull-deps</code> what to download using <code>-c</code> or <code>-h</code> option, which are followed by a maven coordinate.</p></li>
</ol>
<p>Example:</p>
<p>Suppose you want to download <code>mysql-metadata-storage</code> and <code>hadoop-client</code>(both 2.3.0 and 2.4.0) with a specific version, you can run <code>pull-deps</code> command with <code>-c org.apache.druid.extensions:mysql-metadata-storage:0.17.1</code>, <code>-h org.apache.hadoop:hadoop-client:2.3.0</code> and <code>-h org.apache.hadoop:hadoop-client:2.4.0</code>, an example command would be:</p>
<pre><code class="hljs">java -classpath <span class="hljs-string">"/my/druid/lib/*"</span> org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.druid</span><span class="hljs-selector-class">.cli</span><span class="hljs-selector-class">.Main</span> tools pull-deps --clean -c org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.druid</span><span class="hljs-selector-class">.extensions</span>:mysql-metadata-storage:0.17.1 -h org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.hadoop</span>:hadoop-client:<span class="hljs-number">2.3</span>.<span class="hljs-number">0</span> -h org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.hadoop</span>:hadoop-client:<span class="hljs-number">2.4</span>.<span class="hljs-number">0</span>
</code></pre>
<p>Because <code>--clean</code> is supplied, this command will first remove the directories specified at <code>druid.extensions.directory</code> and <code>druid.extensions.hadoopDependenciesDir</code>, then recreate them and start downloading the extensions there. After finishing downloading, if you go to the extension directories you specified, you will see</p>
<pre><code class="hljs">tree <span class="hljs-keyword">extensions
</span><span class="hljs-keyword">extensions
</span>└── mysql-metadata-storage
    └── mysql-metadata-storage-0.17.1.<span class="hljs-keyword">jar
</span></code></pre>
<pre><code class="hljs">tree hadoop-dependencies
hadoop-dependencies/
└── hadoop-client
    ├── <span class="hljs-number">2.3</span>.<span class="hljs-number">0</span>
    │   ├── activation-<span class="hljs-number">1.1</span><span class="hljs-selector-class">.jar</span>
    │   ├── avro-<span class="hljs-number">1.7</span>.<span class="hljs-number">4</span><span class="hljs-selector-class">.jar</span>
    │   ├── commons-beanutils-<span class="hljs-number">1.7</span>.<span class="hljs-number">0</span><span class="hljs-selector-class">.jar</span>
    │   ├── commons-beanutils-core-<span class="hljs-number">1.8</span>.<span class="hljs-number">0</span><span class="hljs-selector-class">.jar</span>
    │   ├── commons-cli-<span class="hljs-number">1.2</span><span class="hljs-selector-class">.jar</span>
    │   ├── commons-codec-<span class="hljs-number">1.4</span><span class="hljs-selector-class">.jar</span>
    ..... lots of jars
    └── <span class="hljs-number">2.4</span>.<span class="hljs-number">0</span>
        ├── activation-<span class="hljs-number">1.1</span><span class="hljs-selector-class">.jar</span>
        ├── avro-<span class="hljs-number">1.7</span>.<span class="hljs-number">4</span><span class="hljs-selector-class">.jar</span>
        ├── commons-beanutils-<span class="hljs-number">1.7</span>.<span class="hljs-number">0</span><span class="hljs-selector-class">.jar</span>
        ├── commons-beanutils-core-<span class="hljs-number">1.8</span>.<span class="hljs-number">0</span><span class="hljs-selector-class">.jar</span>
        ├── commons-cli-<span class="hljs-number">1.2</span><span class="hljs-selector-class">.jar</span>
        ├── commons-codec-<span class="hljs-number">1.4</span><span class="hljs-selector-class">.jar</span>
    ..... lots of jars
</code></pre>
<p>Note that if you specify <code>--defaultVersion</code>, you don't have to put version information in the coordinate. For example, if you want <code>mysql-metadata-storage</code> to use version <code>0.17.1</code>,  you can change the command above to</p>
<pre><code class="hljs">java -classpath <span class="hljs-string">"/my/druid/lib/*"</span> org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.druid</span><span class="hljs-selector-class">.cli</span><span class="hljs-selector-class">.Main</span> tools pull-deps --defaultVersion 0.17.1 --clean -c org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.druid</span><span class="hljs-selector-class">.extensions</span>:mysql-metadata-storage -h org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.hadoop</span>:hadoop-client:<span class="hljs-number">2.3</span>.<span class="hljs-number">0</span> -h org<span class="hljs-selector-class">.apache</span><span class="hljs-selector-class">.hadoop</span>:hadoop-client:<span class="hljs-number">2.4</span>.<span class="hljs-number">0</span>
</code></pre>
<blockquote>
<p>Please note to use the pull-deps tool you must know the Maven groupId, artifactId, and version of your extension.</p>
<p>For Druid community extensions listed <a href="/docs/latest/development/extensions.html">here</a>, the groupId is &quot;org.apache.druid.extensions.contrib&quot; and the artifactId is the name of the extension.</p>
</blockquote>
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