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<div class="page-header"><h1>redis哨兵模式</h1></div>
<div class="well small">Permalink: <a class="more" href="/my-哨兵.html">2019-08-08 18:44:00+02:00</a>
by <a class="url fn" href="/author/shang-wei.html">商伟 </a>
in <a href="/category/my-shang.html">my-shang</a>
tags: <a href="/tag/shang.html">shang</a> </div>
<div><h1>Redis哨兵(Sentinel)模式</h1>
<h2>一、概述</h2>
<p>哨兵通过发送命令。等待Redis服务器响应，从而监控运行的多个Redis实例</p>
<p><img alt="1574609729003" src="http://c.biancheng.net/uploads/allimg/190725/5-1ZH51400314I.png"></p>
<h3>哨兵作用</h3>
<ul>
<li>通过发送命令，让Redis服务器返回 监控其运行状态，包括主服务器和从服务器</li>
<li>当哨兵监测到master宕机，会自动将slave(从)切换成master(主)，然后通过‘发布订阅模式’ 通知其他从服务器，修改配置文件，让他们切换主机</li>
</ul>
<h2>二、配置redis主从服务器</h2>
<ol>
<li>修改redis.conf</li>
</ol>
<div class="highlight"><pre><span></span> <span class="c1"># redis服务器可以跨网络访问</span>
<span class="n">bind</span> <span class="mf">0.0</span><span class="o">.</span><span class="mf">0.0</span>
<span class="c1"># 设置密码</span>
<span class="n">requirepass</span> <span class="s1">'123'</span>
<span class="c1"># 指定主服务器(只配置从服务器，主服务器不需要配置)</span>
<span class="n">slaveof</span> <span class="mf">192.168</span><span class="o">.</span><span class="mf">11.128</span> <span class="mi">6379</span>
<span class="c1"># 主服务器密码</span>
<span class="n">masterauth</span> <span class="mi">123</span>
</pre></div>
<ol>
<li>配置3个哨兵，每个哨兵的配置都是一样的。在Redis安装目录下有一个sentinel.conf文件，copy一份进行修改</li>
</ol>
<div class="highlight"><pre><span></span> <span class="c1"># 禁止保护模式</span>
<span class="n">protected</span><span class="o">-</span><span class="n">mode</span> <span class="n">no</span>
<span class="c1"># 配置监听的主服务器</span>
<span class="c1"># 监控 服务器的名称 监控的主服务器 端口 </span>
<span class="n">sentinel</span> <span class="n">monitor</span> <span class="n">mymaster</span> <span class="mf">192.168</span><span class="o">.</span><span class="mf">11.128</span> <span class="mi">6379</span> <span class="mi">2</span> <span class="c1"># '2' 只有两个或两个以上的哨兵认为主服务器不可用的时候，才会进行failover操作</span>
<span class="c1"># 定义服务器密码</span>
<span class="n">sentinel</span> <span class="n">auth</span><span class="o">-</span><span class="k">pass</span> <span class="n">mymaster</span> <span class="mi">123</span>
</pre></div>
<ol>
<li>启动服务器和哨兵(进入redis下的src)</li>
</ol>
<div class="highlight"><pre><span></span> <span class="c1"># 启动redis服务器进程</span>
<span class="o">./</span><span class="n">redis</span><span class="o">-</span><span class="n">server</span> <span class="o">../</span><span class="n">redis</span><span class="o">.</span><span class="n">conf</span>
<span class="c1"># 启动哨兵进程</span>
<span class="o">./</span><span class="n">redis</span><span class="o">-</span><span class="n">sentinel</span> <span class="o">../</span><span class="n">sentinel</span><span class="o">.</span><span class="n">conf</span>
</pre></div></div>
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