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7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">最佳实践</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Dledger</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本:5.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><h1>Dledger</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="dledger快速搭建">Dledger快速搭建<a href="#dledger快速搭建" class="hash-link" aria-label="Dledger快速搭建的直接链接" title="Dledger快速搭建的直接链接"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="前言">前言<a href="#前言" class="hash-link" aria-label="前言的直接链接" title="前言的直接链接"></a></h3><p>DLedger是一套基于Raft协议的分布式日志存储组件,部署 RocketMQ 时可以根据需要选择使用DLeger来替换原生的副本存储机制。本文档主要介绍如何快速构建和部署基于 DLedger 的可以自动容灾切换的 RocketMQ 集群。</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="1-源码构建">1. 源码构建<a href="#1-源码构建" class="hash-link" aria-label="1. 源码构建的直接链接" title="1. 源码构建的直接链接"></a></h3><p>构建分为两个部分,需要先构建 DLedger,然后 构建 RocketMQ。</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="11-构建-dledger">1.1 构建 DLedger<a href="#11-构建-dledger" class="hash-link" aria-label="1.1 构建 DLedger的直接链接" title="1.1 构建 DLedger的直接链接"></a></h4><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">$ </span><span class="token function" style="color:#d73a49">git</span><span class="token plain"> clone https://github.com/openmessaging/dledger.git</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token builtin class-name">cd</span><span class="token plain"> dledger</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ mvn clean </span><span class="token function" style="color:#d73a49">install</span><span class="token plain"> -DskipTests</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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><h4 class="anchor anchorWithStickyNavbar_LWe7" id="12-构建-rocketmq">1.2 构建 RocketMQ<a href="#12-构建-rocketmq" class="hash-link" aria-label="1.2 构建 RocketMQ的直接链接" title="1.2 构建 RocketMQ的直接链接"></a></h4><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">$ </span><span class="token function" style="color:#d73a49">git</span><span class="token plain"> clone https://github.com/apache/rocketmq.git</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token builtin class-name">cd</span><span class="token plain"> rocketmq</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">git</span><span class="token plain"> checkout -b develop origin/develop</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ mvn -Prelease-all -DskipTests clean </span><span class="token function" style="color:#d73a49">install</span><span class="token plain"> -U</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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="2-快速部署">2. 快速部署<a href="#2-快速部署" class="hash-link" aria-label="2. 快速部署的直接链接" title="2. 快速部署的直接链接"></a></h3><p>在构建成功后</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 comment" style="color:#999988;font-style:italic">#{rocketmq-version} replace with rocketmq actual version. example: 5.1.0</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token builtin class-name">cd</span><span class="token plain"> distribution/target/rocketmq-</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">rocketmq-version</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain">/rocketmq-</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">rocketmq-version</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></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 function" style="color:#d73a49">sh</span><span class="token plain"> bin/dledger/fast-try.sh start</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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>如果上面的步骤执行成功,可以通过 mqadmin 运维命令查看集群状态。</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">$ </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/mqadmin clusterList -n </span><span class="token number" style="color:#36acaa">127.0</span><span class="token plain">.0.1:9876</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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>顺利的话,会看到如下内容:</p><p><img loading="lazy" src="https://img.alicdn.com/5476e8b07b923/TB11Z.ZyCzqK1RjSZFLXXcn2XXa" alt="ClusterList" class="img_ev3q"></p><p>(BID 为 0 的表示 Master,其余都是 Follower)</p><p>启动成功,现在可以向集群收发消息,并进行容灾切换测试了。</p><p>关闭快速集群,可以执行:</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">$ </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/dledger/fast-try.sh stop</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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>快速部署,默认配置在 conf/dledger 里面,默认的存储路径在 /tmp/rmqstore。</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="3-容灾切换">3. 容灾切换<a href="#3-容灾切换" class="hash-link" aria-label="3. 容灾切换的直接链接" title="3. 容灾切换的直接链接"></a></h3><p>部署成功,杀掉 Leader 之后(在上面的例子中,杀掉端口 30931 所在的进程),等待约 10s 左右,用 clusterList 命令查看集群,就会发现 Leader 切换到另一个节点了。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="dledger集群搭建">Dledger集群搭建<a href="#dledger集群搭建" class="hash-link" aria-label="Dledger集群搭建的直接链接" title="Dledger集群搭建的直接链接"></a></h2><p>本部分主要介绍如何部署自动容灾切换的 RocketMQ-on-DLedger Group。</p><p>RocketMQ-on-DLedger Group 是指一组<strong>相同名称</strong>的 Broker,至少需要 3 个节点,通过 Raft 自动选举出一个 Leader,其余节点 作为 Follower,并在 Leader 和 Follower 之间复制数据以保证高可用。 |
| 关键配置介绍: </p><table><thead><tr><th>name</th><th>含义</th><th>举例</th></tr></thead><tbody><tr><td>enableDLegerCommitLog</td><td>是否启动 DLedger</td><td>true</td></tr><tr><td>dLegerGroup</td><td>DLedger Raft Group的名字,建议和 brokerName 保持一致</td><td>RaftNode00</td></tr><tr><td>dLegerPeers</td><td>DLedger Group 内各节点的端口信息,同一个 Group 内的各个节点配置必须要保证一致</td><td>n0-127.0.0.1:40911;n1-127.0.0.1:40912;n2-127.0.0.1:40913</td></tr><tr><td>dLegerSelfId</td><td>节点 id, 必须属于 dLegerPeers 中的一个;同 Group 内各个节点要唯一</td><td>n0</td></tr><tr><td>sendMessageThreadPoolNums</td><td>发送线程个数,建议配置成 Cpu 核数</td><td>16</td></tr></tbody></table><p>这里贴出 conf/dledger/broker-n0.conf 的配置举例。 </p><div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><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:#393A34"><span class="token plain">brokerClusterName = RaftCluster</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">brokerName=RaftNode00</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">listenPort=30911</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">namesrvAddr=127.0.0.1:9876</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">storePathRootDir=/tmp/rmqstore/node00</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">storePathCommitLog=/tmp/rmqstore/node00/commitlog</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">enableDLegerCommitLog=true</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">dLegerGroup=RaftNode00</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">dLegerPeers=n0-127.0.0.1:40911;n1-127.0.0.1:40912;n2-127.0.0.1:40913</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">## must be unique</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">dLegerSelfId=n0</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">sendMessageThreadPoolNums=16</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" 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><h4 class="anchor anchorWithStickyNavbar_LWe7" id="12-启动-broker">1.2 启动 Broker<a href="#12-启动-broker" class="hash-link" aria-label="1.2 启动 Broker的直接链接" title="1.2 启动 Broker的直接链接"></a></h4><p>与老版本的启动方式一致。</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">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/mqbroker -c conf/dledger/xxx-n0.conf </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/mqbroker -c conf/dledger/xxx-n1.conf </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/mqbroker -c conf/dledger/xxx-n2.conf </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="复制代码到剪贴板" title="复制" 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="2-旧集群升级">2. 旧集群升级<a href="#2-旧集群升级" class="hash-link" aria-label="2. 旧集群升级的直接链接" title="2. 旧集群升级的直接链接"></a></h3><p>如果旧集群采用 Master 方式部署,则每个 Master 都需要转换成一个 RocketMQ-on-DLedger Group。<br> |