莫尼特说，启动方法并没有定义，尽管它是这样

Question

我配置了monit来检查我的IRCd及其服务是否正在运行。最近，运行这一切的实例重新启动，但它没有完成它的工作。

它被配置为在启动时启动。

[root@ip-172-31-21-162 ec2-user]# chkconfig --list monit
monit           0:off   1:off   2:on    3:on    4:on    5:on    6:off

控制文件

[root@ip-172-31-21-162 ec2-user]# cat /etc/monit.conf
set httpd port 2812
  allow 127.0.0.1
set daemon 60
  include /etc/monit.d/*
check process ircd with pidfile /home/ec2-user/inspircd/run/pid
  start program = "/usr/bin/perl /home/ec2-user/inspircd/run/inspircd start" 
    as uid "ec2-user" and gid "ec2-user"
    with timeout 30 seconds 
check process services with pidfile /home/ec2-user/anope/run/data/services.pid
  depends on ircd
  start program = "/bin/sh /home/ec2-user/anope/run/bin/anoperc start"
    as uid "ec2-user" and gid "ec2-user"
    with timeout 30 seconds

根据文档，这个语法看起来不错。。。

<START | STOP | RESTART> [PROGRAM] = "program"
    [[AS] UID <number | string>]
    [[AS] GID <number | string>]
    [[WITH] TIMEOUT <number> SECOND(S)]

检查一下，上面写着同样的

[ec2-user@ip-172-31-29-142 ~]$ sudo monit -t 
Control file syntax OK

日志显示，启动方法并没有为这些被监控的进程定义！

[UTC May 14 04:39:51] error    : 'ircd' process is not running
[UTC May 14 04:39:51] error    : monit: Start or stop method not defined -- process ircd
[UTC May 14 04:39:51] error    : 'services' process is not running
[UTC May 14 04:39:51] error    : monit: Start or stop method not defined -- process services

由于某种原因，通过monit手动启动流程是可行的

[root@ip-172-31-21-162 ec2-user]# monit start ircd
[root@ip-172-31-21-162 ec2-user]# monit status
The Monit daemon 5.2.5 uptime: 7h 14m 
Process 'ircd'
  status                            running
  monitoring status                 monitored
  pid                               26483
  parent pid                        1
  uptime                            3m 
...
  data collected                    Sat May 14 02:49:57 2016
Process 'services'
  status                            running
  monitoring status                 monitored
  pid                               26488
  parent pid                        1
  uptime                            3m 
...
  data collected                    Sat May 14 02:49:57 2016

这很奇怪。当我停止那些被检查的进程并在启用调试日志的情况下重新启动monit时，我会看到它报告启动程序。

Process Name          = ircd
 Pid file             = /home/ec2-user/inspircd/run/pid
 Monitoring mode      = active
 Start program        = '/home/ec2-user/inspircd/run/inspircd start' as uid 500 as gid 500 timeout 30 second(s)
 Existence            = if does not exist 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
 Pid                  = if changed 1 times within 1 cycle(s) then alert
 Ppid                 = if changed 1 times within 1 cycle(s) then alert
 Process Name          = services
 Pid file             = /home/ec2-user/anope/run/data/services.pid
 Monitoring mode      = active
 Start program        = '/home/ec2-user/anope/run/bin/anoperc start' as uid 500 as gid 500 timeout 30 second(s)
 Existence            = if does not exist 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
 Depends on Service   = ircd
 Pid                  = if changed 1 times within 1 cycle(s) then alert
 Ppid                 = if changed 1 times within 1 cycle(s) then alert

你知道以环球的名义在这里发生了什么吗？

Answer 1

根据monit的记录行为，还必须为非运行进程定义一个停止方法，以正确启动

在活动模式（默认模式）下，Monit将主动监控服务，并在出现问题时发出警报和/或重新启动服务。

--Monit文档；服务方法

Monit在进程未运行时执行的操作始终是"重新启动"，但由于没有独立的"重新启动程序"（直到Monit 5.7），因此使用了停止+启动顺序。

--Monit问题；当进程未运行时重新启动而不是启动

因此，解决方案现在和过去都是将stop program行添加到控制文件中的已检查进程中。显然，如果您运行的是>=5.7版本，您也可以使用restart program