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arnaudsj / monit

Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. (unofficial mirror)
http://mmonit.com/monit/
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"monit reload" does not completely register new services #9

Open hiyer opened 6 years ago

hiyer commented 6 years ago

This might be the expected behaviour, but I thought I'd check here just in case it isn't. Steps to reproduce:

  1. Add a new config file to monit, e.g in /etc/monit.d
  2. Run monit -v reload. Verify that your new service shows up in the service list. e.g. 
    Process Name          = diskchecker3
Pid file             = /media/ephemeral0/logs/others/disk_check_daemon.pid
Monitoring mode      = active
Start program        = 'redacted' as uid 0 as gid 0 timeout 30 second(s)
Stop program         = 'redacted' as uid 0 as gid 0 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
Timeout              = If restarted 5 times within 5 cycle(s) then unmonitor
  3. Try to start this service with monit -v start diskchecker3. This will fail with the following error: 
    -------------------------------------------------------------------------------
monit: action failed -- There is no service by that name
-------------------------------------------------------------------------------
monit() [0x40f728]
monit(LogError+0xa0) [0x40fda0]
monit(control_service_daemon+0x29d) [0x40b20d]
monit(main+0x644) [0x409ac4]
/lib64/libc.so.6(__libc_start_main+0xf5) [0x7fb535693c05]
monit() [0x40a019]
-------------------------------------------------------------------------------
  4. Run kill -SIGUSR1 $(pidof monit) and then try restarting the service again. This will succeed.

Invoking service monitor restart instead of monit reload will also register the service for start. So my questions are:

  1. What do service start/SIGUSR1 do that reload doesn't?
  2. What is the recommended way to add a new service to a running instance of monit, if any?
arhsimluhar commented 6 years ago

Saw this happening in my case, saw two monit processes running.Kill other instances and you are good to go. Solve my issue.