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| <h1>使用 Prometheus 监控</h1> |
| |
| <!--- |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
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| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <p><a href="https://prometheus.io/">Prometheus</a>是在<a href="https://www.cncf.io/">云原生计算基金会</a>管理下开发的一款开源监控软件。</p> |
| <p>Ozone 原生支持 Prometheus，各个组件会启动一个兼容 Prometheus 的指标端点，将所有可用的 hadoop 指标以 Prometheus 的格式导出发布。</p> |
| <h2 id="准备">准备</h2> |
| <ol> |
| <li><a href="../../zh/start/runningviadocker.html">安装启动</a>一个 Ozone 集群。</li> |
| <li><a href="https://prometheus.io/download/#prometheus">下载</a> Prometheus 二进制包。</li> |
| </ol> |
| <h2 id="使用-prometheus-进行监控">使用 Prometheus 进行监控</h2> |
| <ul> |
| <li>你需要在 <code>ozone-site.xml</code> 文件中添加配置才可以启用 Prometheus 指标端点。</li> |
| </ul> |
| <div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-xml" data-lang="xml"> <span style="color:#f92672"><property></span> |
| <span style="color:#f92672"><name></span>hdds.prometheus.endpoint.enabled<span style="color:#f92672"></name></span> |
| <span style="color:#f92672"><value></span>true<span style="color:#f92672"></value></span> |
| <span style="color:#f92672"></property></span> |
| </code></pre></div><p><em>注意</em>: 对于基于 docker-compose 方式的伪集群，在 <code>docker-config</code> 文件中添加 <code>OZONE-SITE.XML_hdds.prometheus.endpoint.enabled=true</code>。</p> |
| <ul> |
| <li> |
| <p>重启 OM 和 SCM，检查端点：</p> |
| </li> |
| <li> |
| <p>http://scm:9876/prom</p> |
| </li> |
| <li> |
| <p>http://ozoneManager:9874/prom</p> |
| </li> |
| <li> |
| <p>根据这两个端点，创建 prometheus.yaml 配置文件：</p> |
| </li> |
| </ul> |
| <div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml"><span style="color:#f92672">global</span>: |
| <span style="color:#f92672">scrape_interval</span>: <span style="color:#ae81ff">15s</span> |
| |
| <span style="color:#f92672">scrape_configs</span>: |
| - <span style="color:#f92672">job_name</span>: <span style="color:#ae81ff">ozone</span> |
| <span style="color:#f92672">metrics_path</span>: <span style="color:#ae81ff">/prom</span> |
| <span style="color:#f92672">static_configs</span>: |
| - <span style="color:#f92672">targets</span>: |
| - <span style="color:#e6db74">"scm:9876"</span> |
| - <span style="color:#e6db74">"ozoneManager:9874"</span> |
| </code></pre></div><ul> |
| <li>在 prometheus.yaml 文件所在目录启动 Prometheus：</li> |
| </ul> |
| <div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash">prometheus |
| </code></pre></div><ul> |
| <li>在 Prometheus 的 web ui 中查看目标：</li> |
| </ul> |
| <p>http://localhost:9090/targets</p> |
| <p> |
| |
| <img src="prometheus.png" alt='Prometheus 目标页面示例' class="img-responsive" /></p> |
| <ul> |
| <li>在 Prometheus web ui 中查看任意的指标，例如： |
| For example:</li> |
| </ul> |
| <p>http://localhost:9090/graph?g0.range_input=1h&g0.expr=om_metrics_num_key_allocate&g0.tab=1</p> |
| <p> |
| |
| <img src="prometheus-key-allocate.png" alt='Prometheus 指标页面示例' class="img-responsive" /></p> |
| <h2 id="注意事项">注意事项</h2> |
| <p>Ozone 发行包中包含了一个即开即用的容器化环境来试用 Ozone 和 Prometheus，在 <code>compose/ozone</code> 目录下。</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-bash" data-lang="bash">cd compose/ozone |
| export COMPOSE_FILE<span style="color:#f92672">=</span>docker-compose.yaml:monitoring.yaml |
| docker-compose up -d |
| </code></pre></div> |
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