Re: Port Status Check Configuration

[Tino Hendricks]

Rizal,

looking at your script I think you mixed up functionality:
The check if a network port is open or not is done with the  "if failed port…“ 
statements. The „start/stop program“ is meant for the case where these checks 
fail and you tell monit to „restart“.
So if you’re not happy with the built-in checks that monit offers
https://mmonit.com/monit/documentation/monit.html#CONNECTION-TESTS
you need to put your checkport.sh in the test-part of monit’s config.

Something like 

check program checkport.shwith path /opt/monit/scripts/checkport.sh
       if status != 0 then alert

more examples:
https://mmonit.com/monit/documentation/monit.html#PROGRAM-STATUS-TEST

HTH

Tino


Am 28. August 2017 um 05:25:49, Rizal Muttaqin 
(address@hidden(mailto:address@hidden)) schrieb:

> Hello all,
>  
> It's my first experience to play with monit. So, basically I have two
> server with several services running there and I want monit to check
> whether some ports (relative to that service) are listening or not with
> monit. The configuration relatively simple, monit check port status,
> when failed monit will start a nmap script bash script and send the
> status to the file. Plus, in same function, monit will send alert in 5
> cycles.
>  
> The problem is when monit send an connections failed alert then in the
> next 5 minutes monit send again an connection suceeded alert, when I
> check the nmap log script there's no port failed (filtered or
> close)/port status is always open. I've checked manually with nmap when
> monit send failed alert but the result is always the same: port status
> is open:
>  
>  
> Why monit do always send failure alert when the port is open, and why in
> the next 5 minutes interval I see connection succeeded? I've changed set
> daemon to 30, and then the alert interval become 1.5 minutes, and revert
> daemon to be 300, but now the alert interval is always be 1.5 minutes.
>  
> This is my /etc/monitrc configuration for first server (another server
> configuration script exactly the same)
>  
>  
> #####################################################
>  
> set daemon 300 # check services at 300 seconds (5 minutes)
> intervals
>  
> check host somehost with address somehost.com
> start program = "/opt/monit/scripts/checkport.sh start"
> stop program = "/opt/monit/scripts/checkport.sh stop"
> if failed port 80 then restart
> if failed port 843 then restart
> if failed port 2121 then restart
> if failed port 8080 then restart
> if failed port 80 for 5 cycles then alert
> if failed port 843 for 5 cycles then alert
> if failed port 2121 for 5 cycles then alert
> if failed port 8080 for 5 cycles then alert
> alert address@hidden with reminder on 5 cycles
>  
> ########################################################
>  
> and this is my /opt/monit/checkport.sh script
>  
> ########################################################
>  
> #!/bin/bash
>  
> case $1 in
> start)
> nmap -p 80,843,2121,8080 -P0 somehost.com -oG-| awk 'NR>=6 &&
> NR<=9 {print $1 "\t" $2}' | cat >> /opt/monit/log/checkedport | date >>
> /opt/monit/log/checkedport & echo $! > /var/run/checkport.pid ;
> ;;
> stop)
> pkill -F /var/run/checkport.pid ;;
> *)
> echo "usage: checkport {start|stop}" ;;
> esac
> exit 0
> #########################################################
>  
>  
> --
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