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content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Zookeeper Monitor</span><meta itemprop="position" content="3"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: v1.4.x</span><div 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>Monitoring Zookeeper</h1></header><blockquote><p>Collect and monitor the general performance Metrics of Zookeeper.</p></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="prerequisites">PreRequisites<a href="#prerequisites" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="zookeeper-four-word-command">Zookeeper four word command<a href="#zookeeper-four-word-command" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><blockquote><p>The current implementation scheme uses the four word command provided by zookeeper to collect Metrics. |
| Users need to add the four word command of zookeeper to the white list by themselves.</p></blockquote><p>Steps</p><blockquote><p>1.Find our zookeeper configuration file, which is usually zoo.cfg.</p><p>2.Add the following commands to the configuration file</p></blockquote><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic"># Add the required command to the white list</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">4lw.commands.whitelist</span><span class="token operator" style="color:#393A34">=</span><span class="token plain">stat, ruok, conf, isro</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic"># Add all commands to the white list</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">4lw.commands.whitelist</span><span class="token operator" style="color:#393A34">=</span><span class="token plain">*</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 class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path 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 class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><blockquote><p>3.Restart service</p></blockquote><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">zkServer.sh restart</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 class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path 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 class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="netcat-protocol">netcat protocol<a href="#netcat-protocol" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><p>The current implementation scheme requires us to deploy the Linux server of zookeeper |
| Command environment for installing netcat</p><blockquote><p>netcat installation steps</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">yum </span><span class="token function" style="color:#d73a49">install</span><span class="token plain"> -y </span><span class="token function" style="color:#d73a49">nc</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 class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path 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 class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></blockquote><p>If the terminal displays the following information, the installation is successful</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">Complete</span><span class="token operator" style="color:#393A34">!</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 class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path 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 class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path 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="configuration-parameter">Configuration parameter<a href="#configuration-parameter" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><table><thead><tr><th>Parameter name</th><th>Parameter help description</th></tr></thead><tbody><tr><td>Monitoring Host</td><td>Monitored IPV4, IPV6 or domain name. Note⚠️Without protocol header (eg: https://, http://)</td></tr><tr><td>Monitoring name</td><td>Identify the name of this monitoring. The name needs to be unique</td></tr><tr><td>Port</td><td>Port provided by Zookeeper. The default is 2181</td></tr><tr><td>Query timeout</td><td>Set the timeout of Zookeeper connection, unit: ms, default: 3000ms</td></tr><tr><td>Username</td><td>User name of the Linux connection where Zookeeper is located</td></tr><tr><td>Password</td><td>Password of the Linux connection where Zookeeper is located</td></tr><tr><td>Collection interval</td><td>Interval time of monitor periodic data collection, unit: second, and the minimum interval that can be set is 30 seconds</td></tr><tr><td>Whether to detect</td><td>Whether to detect and check the availability of monitoring before adding monitoring. Adding and modifying operations will continue only after the detection is successful</td></tr><tr><td>Description remarks</td><td>For more information about identifying and describing this monitoring, users can note information here</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="collection-metric">Collection Metric<a href="#collection-metric" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="metric-setconf">Metric set：conf<a href="#metric-setconf" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><table><thead><tr><th>Metric name</th><th>Metric unit</th><th>Metric help description</th></tr></thead><tbody><tr><td>clientPort</td><td>none</td><td>Port</td></tr><tr><td>dataDir</td><td>none</td><td>Data snapshot file directory. By default, 100000 operations generate a snapshot</td></tr><tr><td>dataDirSize</td><td>kb</td><td>Data snapshot file size</td></tr><tr><td>dataLogDir</td><td>none</td><td>Transaction log file directory, production environment on a separate disk</td></tr><tr><td>dataLogSize</td><td>kb</td><td>Transaction log file size</td></tr><tr><td>tickTime</td><td>ms</td><td>Time interval between servers or between clients and servers to maintain heartbeat</td></tr><tr><td>minSessionTimeout</td><td>ms</td><td>Minimum session timeout. Heartbeat timex2. The specified time is less than this time, which is used by default</td></tr><tr><td>maxSessionTimeout</td><td>ms</td><td>Maximum session timeout. Heartbeat timex20. The specified time is greater than this time, which is used by default</td></tr><tr><td>serverId</td><td>none</td><td>Server id</td></tr></tbody></table><h4 class="anchor anchorWithStickyNavbar_LWe7" id="metric-setstats">Metric set：stats<a href="#metric-setstats" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><table><thead><tr><th>Metric name</th><th>Metric unit</th><th>Metric help description</th></tr></thead><tbody><tr><td>zk_version</td><td>none</td><td>Server version</td></tr><tr><td>zk_server_state</td><td>none</td><td>Server role</td></tr><tr><td>zk_num_alive_connections</td><td>number</td><td>Number of connections</td></tr><tr><td>zk_avg_latency</td><td>ms</td><td>Average latency</td></tr><tr><td>zk_outstanding_requests</td><td>number</td><td>Number of outstanding requests</td></tr><tr><td>zk_znode_count</td><td>number</td><td>Number of znode</td></tr><tr><td>zk_packets_sent</td><td>number</td><td>Number of packets sent</td></tr><tr><td>zk_packets_received</td><td>number</td><td>Number of packets received</td></tr><tr><td>zk_watch_count</td><td>number</td><td>Number of watch</td></tr><tr><td>zk_max_file_descriptor_count</td><td>number</td><td>Maximum number of file descriptors</td></tr><tr><td>zk_approximate_data_size</td><td>kb</td><td>data size</td></tr><tr><td>zk_open_file_descriptor_count</td><td>number</td><td>Number of open file descriptors</td></tr><tr><td>zk_max_latency</td><td>ms</td><td>Max latency</td></tr><tr><td>zk_ephemerals_count</td><td>number</td><td>Number of ephemeral nodes</td></tr><tr><td>zk_min_latency</td><td>ms</td><td>Min latency</td></tr></tbody></table></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/hertzbeat/edit/master/home/versioned_docs/version-v1.4.x/help/zookeeper.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg 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