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| <h1>动态加载配置</h1> |
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| <!--- |
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| <p>Ozone支持在不重启服务的情况下动态加载某些配置。如果某个属性支持热加载，就可以先在配置文件（<code>ozone-site.xml</code>）中修改它然后调用命令使之刷新到内存。</p> |
| <p>命令：</p> |
| <div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">ozone admin reconfig --service<span style="color:#f92672">=[</span>OM|SCM|DATANODE<span style="color:#f92672">]</span> --address<span style="color:#f92672">=</span><ip:port> start|status|properties |
| </code></pre></div><p>命令项的含义:</p> |
| <ul> |
| <li><strong>–service</strong>: –address 指定节点的Ozone服务类型</li> |
| <li><strong>–address</strong>: 一台服务所在的主机与客户端通信的RPC地址</li> |
| <li>提供3中操作: |
| <ul> |
| <li><strong>start</strong>: 开始异步执行动态加载配置</li> |
| <li><strong>status</strong>: 查看最近一次动态加载的状态</li> |
| <li><strong>properties</strong>: 列出支持动态加载的配置项</li> |
| </ul> |
| </li> |
| </ul> |
| <h2 id="获取可动态加载的属性列表">获取可动态加载的属性列表</h2> |
| <p>要获取 Ozone 中指定组件的可动态加载属性列表, 可以使用命令 <code>ozone admin reconfig --service=[OM|SCM|DATANODE] --address=<ip:port> properties</code>。 |
| 这个命令将会列出所有可以在运行时动态加载的属性。</p> |
| <blockquote> |
| <p>例如, 获取 Ozone OM 可动态加载属性列表</p> |
| <p>$ <code>ozone admin reconfig --service=OM --address=hadoop1:9862 properties</code><br> |
| OM: Node [hadoop1:9862] Reconfigurable properties:<br> |
| ozone.administrators</p> |
| </blockquote> |
| <h2 id="om动态配置">OM动态配置</h2> |
| <blockquote> |
| <p>例如, 在<code>ozone-site.xml</code>文件中修改<code>ozone.administrators</code>的值并执行:</p> |
| <p>$ <code>ozone admin reconfig --service=OM --address=hadoop1:9862 start</code><br> |
| OM: Started reconfiguration task on node [hadoop1:9862].</p> |
| <p>$ <code>ozone admin reconfig --service=OM --address=hadoop1:9862 status</code><br> |
| OM: Reconfiguring status for node [hadoop1:9862]: started at Wed Dec 28 19:04:44 CST 2022 and finished at Wed Dec 28 19:04:44 CST 2022.<br> |
| SUCCESS: Changed property ozone.administrators<br> |
| From: “hadoop”<br> |
| To: “hadoop,bigdata”</p> |
| <p>$ <code>ozone admin reconfig --service=OM --address=hadoop1:9862 properties</code><br> |
| OM: Node [hadoop1:9862] Reconfigurable properties:<br> |
| ozone.administrators</p> |
| </blockquote> |
| <h2 id="scm动态配置">SCM动态配置</h2> |
| <blockquote> |
| <p>例如, 在<code>ozone-site.xml</code>文件中修改<code>ozone.administrators</code>的值并执行:</p> |
| <p>$ <code>ozone admin reconfig --service=SCM --address=hadoop1:9860 start</code><br> |
| SCM: Started reconfiguration task on node [hadoop1:9860].</p> |
| <p>$ <code>ozone admin reconfig --service=SCM --address=hadoop1:9860 status</code><br> |
| SCM: Reconfiguring status for node [hadoop1:9860]: started at Wed Dec 28 19:04:44 CST 2022 and finished at Wed Dec 28 19:04:44 CST 2022.<br> |
| SUCCESS: Changed property ozone.administrators<br> |
| From: “hadoop”<br> |
| To: “hadoop,bigdata”</p> |
| <p>$ <code>ozone admin reconfig --service=SCM --address=hadoop1:9860 properties</code><br> |
| SCM: Node [hadoop1:9860] Reconfigurable properties:<br> |
| ozone.administrators</p> |
| </blockquote> |
| <h2 id="datanode-动态配置">Datanode 动态配置</h2> |
| <blockquote> |
| <p>例如, 在<code>ozone-site.xml</code>文件中修改<code>ozone.example.config</code>的值并执行:</p> |
| <p>$ <code>ozone admin reconfig --service=DATANODE --address=hadoop1:19864 start</code><br> |
| Datanode: Started reconfiguration task on node [hadoop1:19864].</p> |
| <p>$ <code>ozone admin reconfig --service=DATANODE --address=hadoop1:19864 status</code><br> |
| Datanode: Reconfiguring status for node [hadoop1:19864]: started at Wed Dec 28 19:04:44 CST 2022 and finished at Wed Dec 28 19:04:44 CST 2022.<br> |
| SUCCESS: Changed property ozone.example.config<br> |
| From: “old”<br> |
| To: “new”</p> |
| <p>$ <code>ozone admin reconfig --service=DATANODE --address=hadoop1:19864 properties</code><br> |
| Datanode: Node [hadoop1:19864] Reconfigurable properties:<br> |
| ozone.example.config</p> |
| </blockquote> |
| <h3 id="批量操作">批量操作</h3> |
| <p>如果要对 Datanode 执行批操作，你可以设置 <code>--in-service-datanodes</code> 标志. |
| 这将向所有 operational state 为 “IN_SERVICE” 的可用 Datanode 发送 reconfig 请求。<br> |
| 目前只有 Datanode 支持批量操作</p> |
| <blockquote> |
| <p>例如, 列出 Datanode 所有可配置的属性:<br> |
| $ <code>ozone admin reconfig --service=DATANODE --in-service-datanodes properties</code><br> |
| Datanode: Node [hadoop1:19864] Reconfigurable properties:<br> |
| ozone.example.config<br> |
| Datanode: Node [hadoop2:19864] Reconfigurable properties:<br> |
| ozone.example.config<br> |
| Datanode: Node [hadoop3:19864] Reconfigurable properties:<br> |
| ozone.example.config<br> |
| Reconfig successfully 3 nodes, failure 0 nodes.<br></p> |
| </blockquote> |
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