Nagios Support Forum

Posted: **Wed Jul 04, 2012 6:18 am**

I have written a script that will check the state of a virtual machine, and if critical will connect to the vsphere server and start the VM.

The vsphere side code is:

Code: Select all

@echo off

if "%1" == "QAESX1" set pass=xxx
if "%1" == "QAESX2" set pass=xxx
if "%1" == "Mirage" set pass=xxx
if "%1" == "LTNESX01" set pass=xxx

echo "I was passed %1 %2 and the password is %pass%" > "C:\Program Files\NSClient++\scripts\result.txt"

"C:\Program Files (x86)\VMware\VMware vSphere CLI\bin\vmware-cmd.pl" -H %1 --username root --password %pass% -l | Find "%2" > tmp.txt
set /p txtConfig= < tmp.txt
"C:\Program Files (x86)\VMware\VMware vSphere CLI\bin\vmware-cmd.pl" -H %1 --username root --password %pass% %txtConfig% getstate > vmState.txt
set /p vmState= < vmState.txt
if "%vmState%" == "getstate() = on" (
	echo "VM is up"
) else (
	echo "VM is off, starting..."
	"C:\Program Files (x86)\VMware\VMware vSphere CLI\bin\vmware-cmd.pl" -H %1 --username root --password %pass% %txtConfig% start hard
)

The NSC.ini file references this bat file as vmstart.

On the nagios server the command is:

Code: Select all

define command{
	command_name restartvm
	command_line $USER1$/restartvm.sh $HOSTNAME$ $_PARENT$ $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$ $HOSTDOWNTIME$ $SERVICEDOWNTIME$
	}

The script is:

Code: Select all

#!/bin/sh

HostName=$1
Parent=$2
ServiceState=$3
ServiceStateType=$4
ServiceAttempt=$5
HostDownTime=$6
ServiceDownTime=$7

servicestatus="$HostDownTime""$ServiceDownTime"

echo "Parent is $Parent" > vmcheck.txt
echo "Hostname is $HostName" >> vmcheck.txt
echo "Service State is $ServiceState" >> vmcheck.txt
echo "Service state type is $ServiceStateType" >> vmcheck.txt
echo "Service attempt is $ServiceAttempt" >> vmcheck.txt
echo "Host down time is $HostDownTime" >> vmcheck.txt
echo "Service downtime is $ServiceDownTime" >> vmcheck.txt
echo "Service Status is $servicestatus" >> vmcheck.txt


case "$ServiceState" in
   OK)
      ;;
   WARNING)
     ;;
   UNKNOWN)
      ;;
   CRITICAL)
      # restart the server...
      case "$ServiceStateType" in
         SOFT)
	    case "$ServiceAttempt" in
               3)
                  case "$servicestatus" in
                     00)
                        echo -e "Starting VM (3rd soft critical state)..."
				/usr/local/nagios/libexec/check_nrpe -H 192.168.2.97 -c vmstart -a $Parent $HostName
                        ;;
                  esac
                  ;;
            esac
            ;;
         HARD)
            case "$servicestatus" in
               00)
                  echo -e "Starting VM..."
			/usr/local/nagios/libexec/check_nrpe -H 192.168.2.97 -c vmstart -a $Parent $HostName
                  ;;
            esac
            ;;
      esac
      ;;
esac





exit 0

The service is defined as

Code: Select all

define service{
	use			generic-service
	host_name		Nagios-Slave
       service_description  PING
       check_command		check_ping!950.0,20%!1200.0,60%
	max_check_attempts	4
	event_handler		restartvm
	event_handler_enabled 1
	}

The host is defined as:

Code: Select all

define host{
	use		apache-server
	host_name	Nagios-Slave
	alias		Nagios-Slave
	address 	192.168.2.148
	parents	QAESX1
	_PARENT	QAESX1
	statusmap_image	rack_linux.png
	icon_image	rack_linux.png
	}

The VM is currently turned off.

I can (as the nagios user) run the command ./restartvm.sh Nagios-Slave QAESX1 CRITICAL SOFT 3 0 0 and the VM will start up.
I can also call the check_nrpe command /usr/local/nagios/libexec/check_nrpe -H 192.168.2.97 -c vmstart -a QAESX1 Nagios-Slave and the VM will start

However the Vm does not start during normal Nagios checks, and does not even update the text file to echo the values. I have tried a mixture of adding the variables in the defined service, but cant figure out whats causing it not to fire.

I can run the simple check_nrpe commands against the same server and it works, and a simpler script to restart a windows service works fine, so I know NRPE itself is working.

Can anyone help me on this? My head is getting sore from banging it against the desk...

Posted: **Thu Jul 05, 2012 9:56 am**

Got it working now:

It will make the number of services greater, as it looks like custom variables cant be sent i.e. _PARENT, but this works:

Code: Select all

define service{
	use			generic-service
	host_name		Nagios-Slave
       service_description  SSH OK
       check_command		check_nrpe!check_ssh
	#max_check_attempts	3
	event_handler		restartvm!QAESX1!$HOSTNAME$!
	}

Code: Select all

define command{
	command_name restartvm
	command_line /usr/local/nagios/libexec/eventhandlers/restartvm.sh $HOSTNAME$ $ARG1$ $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$ $HOSTDOWNTIME$ $SERVICEDOWNTIME$
	}

Posted: **Fri Jul 06, 2012 2:44 pm**

Glad you got it working!

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