icinga2 disk space check or with three arguments - arguments

Question

I am trying to configure icinga2 to monitor my linux server disk space using check_nrpe. my configuraiton is given below
nrpe.cfg:
command[check_root]=/usr/lib/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
icinga configuration
object CheckCommand "nrpe-check-2arg" {
import "plugin-check-command"
command = [PluginDir + "/check_nrpe" ]
arguments = {
"-H" = "$host_name$"
"-c" = "$check$"
"-a" = "$loads$"
}
}
object Service "testing-haproxy-master: / disk space" {
import "generic-service"
host_name = "tmahaprx01.verizon.com"
check_command = "nrpe-check-2arg"
vars.address = "192.168.1.104"
vars.check = "check_root"
vars.loads = "80%!90%!/"
}
Now the out put i am getting is
root#icinga:/etc/icinga2/hosts# /usr/lib/nagios/plugins/check_nrpe -H 192.168.1.104 -c check_root -a '80%C!90%!/'
DISK OK - free space: /sys/fs/cgroup 0 MB (100% inode=99%); /dev 1457 MB (99%
inode=99%); /run 293 MB (99% inode=99%); /run/lock 5 MB (100% inode=99%);
/run/shm 1468 MB (100% inode=99%); /run/user 100 MB (100% inode=99%);|
/sys/fs/cgroup=0MB;0;0;0;0 /dev=0MB;291;145;0;1457 /run=0MB;58;29;0;293
/run/lock=0MB;0;0;0;5 /run/shm=0MB;293;146;0;1468 /run/user=0MB;19;9;0;100
The expecting output when I execute from my remote Linux machine is
root#tmahaprx01:~# /usr/lib/nagios/plugins/check_disk -w 80% -c 90% -p /
DISK OK - free space: / 43144 MB (96% inode=97%);| /=1743MB;9462;4731;0;47314
Could you please guide me how i can pass the third argument (/) ?

Answer 1

The problem with NRPE is that you're writing a command that executes another command. Assuming that the nrpe.cfg includes something like this:
command[check_disk]=/usr/lib/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
you know that the path must be the 3rd argument:
object CheckCommand "nrpe-disk" {
import "nrpe"
vars.nrpe_arguments = [ "$disk_wfree$%", "$disk_cfree$%", "$disk_partition$" ]
vars.nrpe_command = "check_disk"
//variables should be propagated from host/group definition
vars.disk_wfree = 20
vars.disk_cfree = 10
vars.disk_partition = "/"
}
variable names might be dependent on Icinga version, check the original nrpe command definition on your system, it might be located in:
/usr/share/icinga2/include/command-plugins.conf