check_nrpe command doesn't work from nagios server since debian upgrade

Yesterday I upgraded a server from Debian 9 to Debian 10. This server is supervised with nagios. Since the upgrade, I get an alert, status Unknown saying : > "Volumegroup array03-0 wasn't valid or wasn't specified with "-v > Volumegroup", bye. false The service is VG baie03-0 usage, its command is check_nrpe!check_vgs_array03-0. The goal of this service is to generate an alert if storage on the array is almost full. check_nrpe command is standard : # 'check_NRPE' command definition define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ } If I'm not mistaken, it means that I have a check_vgs_array03-0 command in my /etc/nagios/nrpe.cfg on the supervised server. Let's look at it, here it is : > command[check_vgs_array03-0]=/usr/lib/nagios/plugins/check_vg_size -w > 20 -c 10 -v array03-0 If I just type this command on the supervised server, I have no errors, it works. > VG array03-0 OK Available space is 805 GB;| > array03-0=805GB;20;10;0;19155 I got the error if, for example, I type a volumegroup name that doesn't exist. check_vg_size plugin script goes like this : #!/bin/bash #check_vg_size #set -x # Plugin for Nagios # Written by M. Koettenstorfer (mko@lihas.de) # Some additions by J. Schoepfer (jsc@lihas.de) # Major changes into functions and input/output values J. Veverka (veverka.kuba@gmail.com) # Last Modified: 2012-11-06 # # Description: # # This plugin will check howmany space in volume groups is free # Nagios return codes STATE_OK=0 STATE_WARNING=1 STATE_CRITICAL=2 STATE_UNKNOWN=3 STATE_DEPENDENT=4 SERVICEOUTPUT="" SERVICEPERFDATA="" PROGNAME=$(basename $0) vgs_bin=/usr/bin/whereis -b -B /sbin /bin /usr/bin /usr/sbin -f vgs | awk '{ print $2 }' _vgs="$vgs_bin --units=g" bc_bin=/usr/bin/whereis -b -B /sbin /bin /usr/bin /usr/sbin -f bc | awk '{ print $2 }' exitstatus=$STATE_OK #default declare -a volumeGroups; novg=0; #number of volume groups allVG=false; #Will we use all volume groups we can find on system? inPercent=false; #Use percentage for comparison? unitsGB="GB" unitsPercent="%" units=$unitsGB ######################################################################## ### DEFINE FUNCTIONS ######################################################################## print_usage() { echo "Usage: $PROGNAME -w -c -v [-a] [-p]" echo "If '-a' and '-v' are specified: all volumegroups defined by -v will be ommited and the remaining groups which are found on system are checked" echo "If '-p' is specified: the warning and critical levels are represented as the percent space left on device" echo "" } print_help() { print_usage echo "" echo "This plugin will check how much space is free in volume groups" echo "usage: " exit $STATE_UNKNOWN } checkArgValidity () { # Check arguments for validity if [[ -z $critlevel || -z $warnlevel ]] # Did we get warn and crit values? then echo "You must specify a warning and critical level" print_usage exitstatus=$STATE_UNKNOWN exit $exitstatus elif [ $warnlevel -le $critlevel ] # Do the warn/crit values make sense? then if [ $inPercent != 'true' ] then echo "CRITICAL value of $critlevel GB is less than WARNING level of $warnlevel GB" print_usage exitstatus=$STATE_UNKNOWN exit $exitstatus else echo "CRITICAL value of $critlevel % is higher than WARNING level of $warnlevel %" print_usage exitstatus=$STATE_UNKNOWN exit $exitstatus fi fi } #Does volume group actually exist? volumeGroupExists () { local volGroup="$@" VGValid=$($_vgs 2>/dev/null | grep "$volGroup" | wc -l ) if [[ -z "$volGroup" || $VGValid = 0 ]] then echo "Volumegroup $volGroup wasn't valid or wasn't specified" echo "with \"-v Volumegroup\", bye." echo false return 1 else #The volume group exists echo true return 0 fi } getNumberOfVGOnSystem () { local novg=$($_vgs 2>/dev/null | wc -l) let novg-- echo $novg } getAllVGOnSystem () { novg=$(getNumberOfVGOnSystem) local found=false; for (( i=0; i /dev/null | head -n1 | awk -v name=$columnName ' BEGIN{} { for(i=1;i/dev/null | awk -v n=$cnFree '/[0-9]/{print $n}' | sed -e 's/[\.,\,].*//'`; fullspace=$_vgs $volumeName 2>/dev/null | awk -v n=$cnSize '/[0-9]/{print $n}' | sed -e 's/[\.,\,].*//'; if ( $inPercent ); then #Convert to Percents freespace="$(convertToPercent $freespace $fullspace)" fi } setExitStatus () { local status=$1 local volGroup="$2" local formerStatus=$exitstatus if [ $status -gt $formerStatus ] then formerStatus=$status fi if [ $status = $STATE_UNKNOWN ] ; then SERVICEOUTPUT="${volGroup}" exitstatus=$STATE_UNKNOWN return fi if [ "$freespace" -le "$critlevel" ] then SERVICEOUTPUT=$SERVICEOUTPUT" VG $volGroup CRITICAL Available space is $freespace $units;" exitstatus=$STATE_CRITICAL elif [ "$freespace" -le "$warnlevel" ] then SERVICEOUTPUT=$SERVICEOUTPUT"VG $volGroup WARNING Available space is $freespace $units;" exitstatus=$STATE_WARNING else SERVICEOUTPUT=$SERVICEOUTPUT"VG $volGroup OK Available space is $freespace $units;" exitstatus=$STATE_OK fi SERVICEPERFDATA="$SERVICEPERFDATA $volGroup=$freespace$units;$warnlevel;$critlevel" if [ $inPercent != 'true' ] ; then SERVICEPERFDATA="${SERVICEPERFDATA};0;$fullspace" fi if [ $formerStatus -gt $exitstatus ] then exitstatus=$formerStatus fi } checkVolumeGroups () { checkArgValidity for (( i=0; i &2 ;; esac done checkVolumeGroups echo $SERVICEOUTPUT"|"$SERVICEPERFDATA exit $exitstatus I I use another arg (another script) to the check_nrpe command, it works. for example : > root@nagiosserver:/usr/local/nagios# /usr/local/nagios/libexec/check_nrpe > -H srv-supervised04 -c check_load OK - load average: 3.79, 2.99, 1.83|load1=3.790;25.000;30.000;0; load5=2.990;20.000;25.000;0; load15=1.830;15.000;20.000;0; VG array03-0 does exist : > root@srv-supervised04:/usr/lib/nagios/plugins# vgdisplay --- Volume group --- VG Name array03-0 System ID Format > lvm2 Metadata Areas 1 Metadata Sequence No 34 VG Access > read/write VG Status resizable MAX LV 0 > Cur LV 5 Open LV 4 Max PV > 0 Cur PV 1 Act PV 1 VG Size > 4903887 Alloc PE / Size 4697600 / 206287 / OgzAMF-DGbW-3t3L-Wk7k-gY1g-s6fH-zYEKad So. VG does exist. The check_vg_size plugin works when used locally, the check_nrpe command works from the nagios server when used with another plugin but check_vg_size doesn't work from nagios server. Error message is apparently that array03-0 doesn't exist while it does. I haven't changed anything from all the files. It appeared with Debian update from 9 to 10 (during the installation, I decided to keep my nrpe.cfg modified file). Anyone knows where it can come from ? Debian version ? New bash version maybe ? An incompatibility between the nagios server (still Debian 9) and the supervised one (Debian 10) ?