Nagios Support Forum

• Hello everyone, it's my first post ever and I can tell I got like 2 weeks experience in this Nagios saga. I have been recommended to try Nagios as solution for my probably not so weird problem for you guys.
  
  To get to the point, idea is to set monitoring for about ten windows 10 virtual machines to check as often as possible who is currently logged into them and to see exactly their usernames, same as you would use "w" command in terminal on Linux OS or even "query user" command in cmd. It would be ideal to have output something like: (status | number of users | name of users)
  -where status should be Nagios exit codes ("ok" if there is 1 user, "warning" if there are 2 users and "critical" if there are 3 and more users)
• My setup and progress so far are that I have 3 virtual machines in Hyper-V, one is Nagios XI server (Centos 7) and two are standard Windows 10 virtual machines to test on them(one for active check and other for passive). With little research I found out that this type and output of checks does not exist as "default" when you set ncpa for clients, so I had to find out how to manually add custom checks (services) and I made I guess not so good bash script on location /usr/local/nagios/libexec/ to get what I need:
  

  Code: Select all

  #!/bin/bash
  
  mLine1=`w | awk 'NR==1'`
  mLine2=`w | awk 'NR==2'`
  mLine3=`w | awk 'NR==3'`
  
  mUsers=`echo $mLine1 | awk '{print $4}'`
  mUser1=`echo $mLine3 | awk '{print $1}'`
  mUser2=`echo $mLine4 | awk '{print $1}'`
  mUser3=`echo $mLine5 | awk '{print $1}'`
  mUser4=`echo $mLine6 | awk '{print $1}'`
  mUser5=`echo $mLine7 | awk '{print $1}'`
  
  nagios_func(){
    echo "$1 | Number of users= $mUsers | Users: $mUser1 , $mUser2 , $mUser3 , $mUser4 , $mUser5";
  }
  
  if [[ $mUsers -gt 2 ]]
  then
    nagios_func "CRITICAL"; exit 2;
  elif [[ $mUsers -gt 1 ]]
  then
    nagios_func "WARNING"; exit 1;
  else
    nagios_func "OK"; exit 0;
  fi

  and output:
  OK | Number of users= 1 | Users: root , , , ,
• Next thing at Manage Plugin tab I have my newly made plugin:
  File | Owner | Group | Permissions | Date
  check_myUsers | nagios | nagios | rwxrwxr-x | 2022-03-31 15:47:17
• Now here goes part that I think I need your help to manage/change something if I'm on right path. Next thing that I guess I have problem is command on Core Config Manager and >_Commands tab, there i made command named "check_myUsers" and command line part that value is "$USER1$/check_myUsers"
• At next step I made service where check command is "check_myUsers" but when I run check command, I got same output as it is when I test script on server instead of getting active user on my windows machine which now is "admin":
  [nagios@localhost.localdomain ~]$ /usr/local/nagios/libexec/check_myUsers
  OK | Number of users= 1 | Users: root , , , ,
  
  I guess there is problem with command part so I don't have result from my clients, and I would be so glad to get some tips/hints from You guys how to fix this issue.
  Thank you all and please forgive if this is not right form of writing ticket.

{
    "user": {
        "count": [
            2,
            "users"
        ],
        "list": [
            [
                "user1",
                "user2"
            ],
            "users"
        ]
    }
}

check_myUsersList
Command View:

• $USER1$/check_ncpa.py -H $HOSTADDRESS$ -t 'windows1' -P 5693 $ARG1$

$ARG1$:

• "-M user/list"

check_myUsersCount
Command View:

• "$USER1$/check_ncpa.py -H $HOSTADDRESS$ -t 'windows1' -P 5693 $ARG1$"

$ARG1$:

• "-M user/count"

• -w 2 -c 3
• -warning=2 -critical=3