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class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Configure Apache Druid to use Kerberized Apache Hadoop as deep storage</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="hadoop-setup">Hadoop Setup<a href="#hadoop-setup" class="hash-link" aria-label="Direct link to Hadoop Setup" title="Direct link to Hadoop Setup"></a></h2><p>Following are the configurations files required to be copied over to Druid conf folders:</p><ol><li>For HDFS as a deep storage, hdfs-site.xml, core-site.xml</li><li>For ingestion, mapred-site.xml, yarn-site.xml</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="hdfs-folders-and-permissions">HDFS Folders and permissions<a href="#hdfs-folders-and-permissions" class="hash-link" aria-label="Direct link to HDFS Folders and permissions" title="Direct link to HDFS Folders and permissions"></a></h3><ol><li><p>Choose any folder name for the druid deep storage, for example &#x27;druid&#x27;</p></li><li><p>Create the folder in hdfs under the required parent folder. For example,
 <code>hdfs dfs -mkdir /druid</code>
 OR
 <code>hdfs dfs -mkdir /apps/druid</code></p></li><li><p>Give druid processes appropriate permissions for the druid processes to access this folder. This would ensure that druid is able to create necessary folders like data and indexing_log in HDFS.
 For example, if druid processes run as user &#x27;root&#x27;, then</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">`hdfs dfs -chown root:root /apps/druid`</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">OR</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">`hdfs dfs -chmod 777 /apps/druid`</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ol><p>Druid creates necessary sub-folders to store data and index under this newly created folder.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="druid-setup">Druid Setup<a href="#druid-setup" class="hash-link" aria-label="Direct link to Druid Setup" title="Direct link to Druid Setup"></a></h2><p>Edit common.runtime.properties at conf/druid/_common/common.runtime.properties to include the HDFS properties. Folders used for the location are same as the ones used for example above.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="commonruntimeproperties">common.runtime.properties<a href="#commonruntimeproperties" class="hash-link" aria-label="Direct link to common.runtime.properties" title="Direct link to common.runtime.properties"></a></h3><div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-properties codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Deep storage</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># For HDFS:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.storage.type=hdfs</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.storage.storageDirectory=/druid/segments</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># OR</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># druid.storage.storageDirectory=/apps/druid/segments</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Indexing service logs</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># For HDFS:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.indexer.logs.type=hdfs</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.indexer.logs.directory=/druid/indexing-logs</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># OR</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># druid.storage.storageDirectory=/apps/druid/indexing-logs</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Note: Comment out Local storage and S3 Storage parameters in the file</p><p>Also include hdfs-storage core extension to <code>conf/druid/_common/common.runtime.properties</code></p><div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-properties codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Extensions</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.extensions.directory=dist/druid/extensions</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.extensions.hadoopDependenciesDir=dist/druid/hadoop-dependencies</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.extensions.loadList=[&quot;mysql-metadata-storage&quot;, &quot;druid-hdfs-storage&quot;, &quot;druid-kerberos&quot;]</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="hadoop-jars">Hadoop Jars<a href="#hadoop-jars" class="hash-link" aria-label="Direct link to Hadoop Jars" title="Direct link to Hadoop Jars"></a></h3><p>Ensure that Druid has necessary jars to support the Hadoop version.</p><p>Find the hadoop version using command, <code>hadoop version</code></p><p>In case there is other software used with hadoop, like <code>WanDisco</code>, ensure that</p><ol><li>the necessary libraries are available</li><li>add the requisite extensions to <code>druid.extensions.loadlist</code> in <code>conf/druid/_common/common.runtime.properties</code></li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="kerberos-setup">Kerberos setup<a href="#kerberos-setup" class="hash-link" aria-label="Direct link to Kerberos setup" title="Direct link to Kerberos setup"></a></h3><p>Create a headless keytab which would have access to the druid data and index.</p><p>Edit conf/druid/_common/common.runtime.properties and add the following properties:</p><div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-properties codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.hadoop.security.kerberos.principal</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.hadoop.security.kerberos.keytab</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>For example</p><div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-properties codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.hadoop.security.kerberos.principal=hdfs-test@EXAMPLE.IO</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.hadoop.security.kerberos.keytab=/etc/security/keytabs/hdfs.headless.keytab</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="restart-druid-services">Restart Druid Services<a href="#restart-druid-services" class="hash-link" aria-label="Direct link to Restart Druid Services" title="Direct link to Restart Druid Services"></a></h3><p>With the above changes, restart Druid. This would ensure that Druid works with Kerberized Hadoop</p></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/latest/tutorials/docker"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Run with Docker</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/latest/tutorials/tutorial-sql-query-view"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Get to know Query view</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#hadoop-setup" class="table-of-contents__link toc-highlight">Hadoop Setup</a><ul><li><a href="#hdfs-folders-and-permissions" class="table-of-contents__link toc-highlight">HDFS Folders and permissions</a></li></ul></li><li><a href="#druid-setup" class="table-of-contents__link toc-highlight">Druid Setup</a><ul><li><a href="#commonruntimeproperties" class="table-of-contents__link toc-highlight">common.runtime.properties</a></li><li><a href="#hadoop-jars" class="table-of-contents__link toc-highlight">Hadoop Jars</a></li><li><a href="#kerberos-setup" class="table-of-contents__link toc-highlight">Kerberos setup</a></li><li><a href="#restart-druid-services" class="table-of-contents__link toc-highlight">Restart Druid Services</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="margin-bottom--sm"><img src="/img/favicon.png" class="themedImage_ToTc themedImage--light_HNdA footer__logo"><img src="/img/favicon.png" class="themedImage_ToTc themedImage--dark_i4oU footer__logo"></div><div class="footer__copyright">Copyright © 2023 Apache Software Foundation. Except where otherwise noted, licensed under CC BY-SA 4.0. Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></div></footer></div>
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