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	<title>服务器安全维护工作室 &#187; 阿里云SLB健康检查的日志特殊处理</title>
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		<title>阿里云SLB健康检查的日志特殊处理</title>
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		<pubDate>Mon, 14 Mar 2016 14:31:09 +0000</pubDate>
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		<category><![CDATA[阿里云SLB健康检查的日志特殊处理]]></category>

		<guid isPermaLink="false">https://www.fuwuqiok.com/?p=3076</guid>
		<description><![CDATA[<p>SLB健康检查的频率比较高，每秒都有好几个。日积月累就带来了大量web service的日志。一来浪费存储空间 [&#8230;]</p>
<p><a rel="nofollow" href="https://www.fuwuqiok.com/%e9%98%bf%e9%87%8c%e4%ba%91slb%e5%81%a5%e5%ba%b7%e6%a3%80%e6%9f%a5%e7%9a%84%e6%97%a5%e5%bf%97%e7%89%b9%e6%ae%8a%e5%a4%84%e7%90%86/">阿里云SLB健康检查的日志特殊处理</a>，首发于<a rel="nofollow" href="https://www.fuwuqiok.com">服务器安全维护工作室</a>。</p>
]]></description>
				<content:encoded><![CDATA[<p>SLB健康检查的频率比较高，每秒都有好几个。日积月累就带来了大量web service的日志。一来浪费存储空间，二来消耗磁盘性能。除了官方建议的降低健康检查频率外，或许有一些变通的思维</p>
<p><strong>1、如果对HTTP或者TCP转发协议不挑剔，换成TCP转发并不开启http健康检查就OK了。</strong></p>
<p>优势：方便，控制台操作下就好了。</p>
<p>劣势：只是这样也失去了应用层异常的发现能力。</p>
<p><strong>2、为健康检查单独建立一个没有开启日志的virtualhost，通过不同的端口或者hostname，让健康检查请求不会请求到业务host。</strong></p>
<p>优势：web service级别的异常依然能够被健康检查发现。</p>
<p>劣势：virtualhost级别的异常，SLB健康检查就无法发现了。</p>
<p><strong>3、利用nginx等web服务器的规则，为健康检查的文件名（URI）做单独的日志配置，以Nginx为例：</strong></p>
<p>如下配置，健康检查配置一个业务上无意义的check.html。针对这个文件做的请求，不记录日志。</p>
<div class="crayon-pre">
<div id="crayon-56e5649bd2574294403245-1" class="crayon-line"><span class="crayon-v">location</span> <span class="crayon-o">~</span> <span class="crayon-o">/</span><span class="crayon-v">check</span><span class="crayon-e">.html</span></div>
<div id="crayon-56e5649bd2574294403245-2" class="crayon-line crayon-striped-line"><span class="crayon-h">        </span><span class="crayon-sy">{</span></div>
<div id="crayon-56e5649bd2574294403245-3" class="crayon-line"><span class="crayon-h">              </span><span class="crayon-e">access_log </span><span class="crayon-v">off</span><span class="crayon-sy">;</span> <span class="crayon-c">#关闭日志</span></div>
<div id="crayon-56e5649bd2574294403245-4" class="crayon-line crayon-striped-line"><span class="crayon-h">             </span> <span class="crayon-c">#access_log  /var/log/nginx/access/health_check.log main;或者健康检查的日志配置到单独的文件</span></div>
<div id="crayon-56e5649bd2574294403245-5" class="crayon-line"><span class="crayon-h">        </span><span class="crayon-sy">}</span></div>
<div class="crayon-line">
<p>优势：健康检查日志可以随意配置，且不会损失健康检查的特性。</p>
</div>
</div>
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