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| <h1>Ozone CLI</h1> |
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| <p>Ozone has a set of command line tools that can be used to manage ozone.</p> |
| <p>All these commands are invoked via the <code>ozone</code> script.</p> |
| <p>The commands supported by ozone are:</p> |
| <ul> |
| <li><strong>classpath</strong> - Prints the class path needed to get the hadoop jar and the |
| required libraries.</li> |
| <li><strong>dtutil</strong> - Operations related to delegation tokens</li> |
| <li><strong>fs</strong> - Runs a command on ozone file system.</li> |
| <li><strong>datanode</strong> - Via daemon command, the HDDS data nodes can be started or |
| stopped.</li> |
| <li><strong>envvars</strong> - Display computed Hadoop environment variables.</li> |
| <li><strong>freon</strong> - Runs the ozone load generator.</li> |
| <li><strong>genesis</strong> - Developer Only, Ozone micro-benchmark application.</li> |
| <li><strong>getconf</strong> - Reads ozone config values from configuration.</li> |
| <li><strong>jmxget</strong> - Get JMX exported values from NameNode or DataNode.</li> |
| <li><strong>om</strong> - Ozone Manager, via daemon command can be started or stopped.</li> |
| <li><strong>sh</strong> - Primary command line interface for ozone.</li> |
| <li><strong>scm</strong> - Storage Container Manager service, via daemon can be |
| stated or stopped.</li> |
| <li><strong>scmcli</strong> - Developer only, Command Line Interface for the Storage |
| Container Manager.</li> |
| <li><strong>version</strong> - Prints the version of Ozone and HDDS.</li> |
| <li><strong>genconf</strong> - Generate minimally required ozone configs and output to |
| ozone-site.xml.</li> |
| </ul> |
| <h2 id="understanding-ozone-command-shell">Understanding Ozone command shell</h2> |
| <p>The most used command when working with Ozone is the Ozone command shell. |
| Ozone command shell gives a command shell interface to work against |
| Ozone.</p> |
| <p>The Ozone shell commands take the following format.</p> |
| <blockquote> |
| <p><em>ozone sh object action url</em></p> |
| </blockquote> |
| <p><strong>ozone</strong> script is used to invoke all Ozone sub-commands. The ozone shell is |
| invoked via <code>sh</code> command.</p> |
| <p>The object can be a volume, bucket or a key. The action is various verbs like |
| create, list, delete etc.</p> |
| <p>Ozone URL can point to a volume, bucket or keys in the following format:</p> |
| <p><em>[scheme][server:port]/volume/bucket/key</em></p> |
| <p>Where,</p> |
| <ol> |
| <li> |
| <p>Scheme - This should be <code>o3</code> which is the native RPC protocol to access |
| Ozone API. The usage of the schema is optional.</p> |
| </li> |
| <li> |
| <p>Server:Port - This is the address of the Ozone Manager. This can be server |
| only, in that case, the default port is used. If this value is omitted |
| then the defaults specified in the ozone-site.xml will be used for Ozone |
| Manager address.</p> |
| </li> |
| </ol> |
| <p>Depending on the call, the volume/bucket/key names will be part of the URL. |
| Please see volume commands, bucket commands, and key commands section for more |
| detail.</p> |
| <h2 id="invoking-help">Invoking help</h2> |
| <p>Ozone shell help can be invoked at <em>object</em> level or at <em>action</em> level. |
| For example:</p> |
| <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>ozone sh volume --help</span></span></code></pre></div> |
| <p>This will show all possible actions for volumes.</p> |
| <p>or it can be invoked to explain a specific action like |
| <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>ozone sh volume create --help</span></span></code></pre></div> |
| This command will give you command line options of the create command.</p> |
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