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PHP脚本监控Nginx 502错误并自动重启php-fpm
服务器时不时出现Nginx 502 Bad Gateway,如果在电脑旁边还好,要是半夜或者出去了,怎么办?
没关系,写个脚本检测服务状态,发现异常,自动重启。
自动重启脚本:
<span style="color: #000000;">php </span><span style="color: #800080;">$url</span> = 'http://blog.rebill.info'<span style="color: #000000;">; </span><span style="color: #800080;">$cmd</span> = '/usr/local/php/sbin/php-fpm restart'<span style="color: #000000;">; </span><span style="color: #0000ff;">for</span>(<span style="color: #800080;">$i</span> = 0; <span style="color: #800080;">$i</span> $i ++<span style="color: #000000;">){ </span><span style="color: #800080;">$exec</span> = "curl connect-timeout 3 -I <span style="color: #800080;">$url</span> 2>/dev/null"<span style="color: #000000;">; </span><span style="color: #800080;">$res</span> = <span style="color: #008080;">shell_exec</span>(<span style="color: #800080;">$exec</span><span style="color: #000000;">); </span><span style="color: #0000ff;">if</span>(<span style="color: #008080;">stripos</span>(<span style="color: #800080;">$res</span>, '502 Bad Gateway') !== <span style="color: #0000ff;">false</span><span style="color: #000000;">){ </span><span style="color: #008080;">shell_exec</span>(<span style="color: #800080;">$cmd</span><span style="color: #000000;">); </span><span style="color: #0000ff;">exit</span><span style="color: #000000;">(); } }</span>
原理就是用curl获取HTTP头,发现502状态码就执行重启php-fpm的命令。
url和cmd根据实际情况改成自己的。然后放到crontab里一分钟执行一次。
*/<span style="color: #800000;">1</span> * * * * /usr/bin/php /root/crontab/nginx502.php