Monit：如何最佳地监控一个URL

我的networking服务器用php5-fpm运行nginx。 如果出现问题，通常php5-fpm会挂起，导致服务器出现“错误的网关”错误。 当然，我从来不知道，如果Nginx可能会崩溃，有一天。

当发生什么事情时，两个进程（通常是线程）通常都存在，需要重启。 我对当前问题的原因不是很感兴趣，但是想要重启这两个进程。 为此，我创build了两个bash脚本/etc/monit/webserver.start.sh和/etc/monit/webserver.stop.sh。

这是我的监控configuration文件（在conf.d中）：

check process webserver with pidfile /var/run/nginx.pid start program = "/etc/monit/webserver.start.sh" stop program = "/etc/monit/webserver.stop.sh" if failed (url https://www.myserver.com/example/ and content == 'test string' and timeout 20 seconds) then alert if failed (url https://www.myserver.com/example/ and content == 'test string' and timeout 20 seconds) for 2 cycles then restart if failed (url https://www.myserver.com/example/ and content == 'test string' and timeout 20 seconds) for 4 cycles then exec "/sbin/reboot" 

这并不完全错误，但仍有一些问题：

• 指定主机的Windows Server 2012端口转发
• 页面加载长时间的停顿。 这是什么？
• 创build一个带有两个互联网连接和一个局域网连接的多宿主linux负载均衡器
• 跨不同子网的故障切换
• iSCSI SAN仍然是集群中的一员？ 它可以高度可用吗？

1. 实际上，我不想监视这里的nginx进程，而是监视ports / URL。 我可以使用任何其他支票而不是check process吗？
2. 1次失败后执行不同的操作，2次失败，4次失败， if failed条件，我需要三个，导致三个服务器请求。 有没有办法在每个循环运行一个请求，并在不同数量的失败之后执行不同的活动？

我试图从官方的monit参考find答案，但显然，我不明白这个来源所描述的可能性。 因此，我会非常赞成一些build议。

更新

我花了一些时间与monit手册页（它的结构比在线手册更好，在我看来），我发现这个优化：

 CHECK HOST webserver WITH ADDRESS 127.0.0.1 START PROGRAM = "/etc/monit/webserver.start.sh" STOP PROGRAM = "/etc/monit/webserver.stop.sh" IF NOT EXIST THEN ALERT IF FAILED (url https://www.mydomain.tld/example/ and content == 'test content' and timeout 20 seconds) FOR 2 CYCLES THEN RESTART IF 2 RESTARTS WITHIN 5 CYCLES THEN EXEC "/sbin/reboot" 

此修改不包括第一个URL失败的警报（解决方法是在这里使用虚拟启动/停止命令），但可以在2失败并重新启动失败4后失败 – 只有一个服务器请求。

这还不完美。 如果有人知道如何做得更好，build议是斯蒂尔赞赏:)谢谢！

更新

经过一些testing后，我不build议使用monit的超时function（ IF 2 REsTARTS WITHIN... ）进行二阶操作。 看起来，超时重新启动后，在特定情况下重新运行。 在我的情况下，这导致多重启动：

 [CET Dec 28 05:59:50] error : skipping queued event /var/monit/id - unknown data format [CET Dec 28 05:59:50] error : skipping queued event /var/monit/state - unknown data format [CET Dec 30 03:10:52] error : 'webserver' failed protocol test [HTTP] at INET[www.myserver.com/example/] via TCPSSL -- HTTP: Error receiving data -- Resource temporarily unavailable [CET Jan 1 03:08:10] error : 'webserver' failed protocol test [HTTP] at INET[www.myserver.com/example/] via TCPSSL -- HTTP: Error receiving data -- Resource temporarily unavailable [CET Jan 1 03:09:30] error : 'webserver' failed protocol test [HTTP] at INET[www.myserver.com/example/] via TCPSSL -- HTTP: Error receiving data -- Resource temporarily unavailable [CET Jan 1 03:09:31] info : 'webserver' trying to restart [CET Jan 1 03:09:31] info : 'webserver' stop: /etc/monit/webserver.stop.sh [CET Jan 1 03:09:31] info : 'webserver' start: /etc/monit/webserver.start.sh [CET Jan 1 03:10:31] error : 'webserver' failed, cannot open a connection to INET[www.myserver.com/example/] via TCPSSL [CET Jan 1 03:10:31] info : 'webserver' trying to restart [CET Jan 1 03:10:31] info : 'webserver' stop: /etc/monit/webserver.stop.sh [CET Jan 1 03:10:31] info : 'webserver' start: /etc/monit/webserver.start.sh [CET Jan 1 03:10:31] error : 'php-fpm' process is not running [CET Jan 1 03:10:31] info : 'php-fpm' trying to restart [CET Jan 1 03:10:31] info : 'php-fpm' start: /usr/sbin/service [CET Jan 1 03:10:31] error : 'nginx' process is not running [CET Jan 1 03:10:31] info : 'nginx' trying to restart [CET Jan 1 03:10:31] info : 'nginx' start: /usr/sbin/service [CET Jan 1 03:11:32] error : 'webserver' service restarted 2 times within 2 cycles(s) - exec [CET Jan 1 03:11:32] info : 'webserver' exec: /sbin/reboot [CET Jan 1 03:12:24] info : Starting monit daemon with http interface at [0.0.0.0:2812] [CET Jan 1 03:12:24] info : Monit start delay set -- pause for 240s [CET Jan 1 03:16:24] info : Starting monit HTTP server at [0.0.0.0:2812] [CET Jan 1 03:16:24] info : monit HTTP server started [CET Jan 1 03:16:24] info : 'Memory' Monit started [CET Jan 1 03:16:24] error : skipping queued event /var/monit/id - unknown data format [CET Jan 1 03:16:24] error : skipping queued event /var/monit/state - unknown data format [CET Jan 1 03:16:24] error : 'webserver' service restarted 2 times within 2 cycles(s) - exec [CET Jan 1 03:16:24] info : 'webserver' exec: /sbin/reboot [CET Jan 1 03:17:04] info : Starting monit daemon with http interface at [0.0.0.0:2812] [CET Jan 1 03:17:04] info : Monit start delay set -- pause for 240s [CET Jan 1 03:21:04] info : Starting monit HTTP server at [0.0.0.0:2812] [CET Jan 1 03:21:04] info : monit HTTP server started [CET Jan 1 03:21:04] info : 'Memory' Monit started [CET Jan 1 03:21:04] error : skipping queued event /var/monit/id - unknown data format [CET Jan 1 03:21:04] error : skipping queued event /var/monit/state - unknown data format [CET Jan 1 03:21:04] error : 'webserver' service restarted 2 times within 2 cycles(s) - exec [CET Jan 1 03:21:04] info : 'webserver' exec: /sbin/reboot [CET Jan 1 03:21:44] info : Starting monit daemon with http interface at [0.0.0.0:2812] [CET Jan 1 03:21:44] info : Monit start delay set -- pause for 240s [CET Jan 1 03:25:44] info : Starting monit HTTP server at [0.0.0.0:2812] [CET Jan 1 03:25:44] info : monit HTTP server started [CET Jan 1 03:25:44] info : 'Memory' Monit started [CET Jan 1 03:25:44] error : skipping queued event /var/monit/id - unknown data format [CET Jan 1 03:25:44] error : skipping queued event /var/monit/state - unknown data format [CET Jan 1 03:25:44] error : 'webserver' service restarted 2 times within 2 cycles(s) - exec [CET Jan 1 03:25:44] info : 'webserver' exec: /sbin/reboot 

除非任何人有一个好主意，否则我将切换回多个请求。 最后，他们不那么费时…

BurninLeo

 check host mmonit.com with address mmonit.com if failed port 80 protocol http with http headers [Host: mmonit.com, Cache-Control: no-cache, Cookie: csrftoken=nj1bI3CnMCaiNv4beqo8ZaCfAQQvpgLH] and request /monit/ with content = "Monit [0-9.]+" then alert 

 exec "/usr/local/tomcat/bin/startup.sh" as uid nobody and gid nobody