Устанавливаем snmp на сервер:
apt-get install snmpd
Редактируем /etc/default/snmpd:
- Удаляем “-u snmp”
- Заменяем IP 127.0.0.1 адресом сервера. Например 172.16.0.5
Создаем нового пользователя my_username и mib. Пароль должен быть не менее 8 символов. Имя пользователя ТОЛЬКО буквы.
/etc/init.d/snmpd stop
echo rouser my_username priv >> /etc/snmp/snmpd.conf
echo “extend .1.3.6.1.4.1.2021.51 beancounters /bin/cat /proc/user_beancounters” >> /etc/snmp/snmpd.conf
echo “extend .1.3.6.1.4.1.2021.52 vzquota /bin/cat /proc/vz/vzquota” >> /etc/snmp/snmpd.conf
echo createUser my_username MD5 my_password DES >> /var/lib/snmp/snmpd.conf
/etc/init.d/snmpd start
Тестируем SNMP
snmpwalk -v 3 -u my_username -l authPriv -a MD5 -A my_password -x DES -X my_password $(hostname -i)
Добавляем конфигурацию в Nagios2:
define command { command_name check_snmp_openvz_on_port command_line /usr/local/bin/check_snmp_openvz.sh $HOSTADDRESS$ $ARG1$ $ARG2$ $ARG3$ }
define host { host_name openvz-server alias Server Openvz address 172.16.0.5 use generic-host contact_groups admins }
define service{ use generic-service host_name openvz-server service_description Virtual Machines Limits check_command check_snmp_openvz_on_port!161!my_username!my_password max_check_attempts 1 }
Дальше создаем скрипт /usr/local/bin/check_snmp_openvz.sh
#!/bin/bash HOST=$1 PORT=$2 USER=$3 PASS=$4 export FILE=/tmp/$HOST.beancounters RET=0 DATA_TMP=`snmpwalk -v 3 -u $USER -l authPriv -a MD5 -A $PASS -x DES -X $PASS $HOST:$PORT .1.3.6.1.4.1.2021.51.4` if [ "$?" != "0" ]; then echo "Unknown snmp error" exit 1 fi DATA=`echo "$DATA_TMP"| perl -ne '/"(.*)"/ ; print "$1\n" ;'` if [ -f $FILE ]; then echo "$DATA" | perl -n -e' use Data::Dumper; my $file=$ENV{"FILE"}; my $ret=0 ; my $vid ; my $resource ; my $held ; my $maxheld ; my $barrier ; my $limit ; my $failcnt ; my %beancounters ; my %beancounters_old ; while(<STDIN>){ my %vmachine; if ( /\D*(\d+):.*/ ){ $vid=$1; $beancounters{$vid}=\%vmachine ; } if ( /^[\W\d]+([a-z]+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+).*/ ) { $resource=$1 ; $held=$2 ; $maxheld=$3 ; $barrier=$4 ; $limit=$5 ; $failcnt=$6 ; ${beancounters{$vid}}{$resource}=[$held , $maxheld , $barrier , $limit ,$failcnt ]; if ( ($held > $barrier) && ($barrier != 0) ) { print "WARNING: Limits on $vid: $resource held->$held , barrier->$barrier ( limit->$limit ) " ; $ret=1; } } } # read and parse old data open(MYINPUTFILE, "<$file"); while(<MYINPUTFILE>){ my %vmachine; if ( /\D*(\d+):.*/ ){ $vid=$1; $beancounters_old{$vid}=\%vmachine ; } if ( /^[\W\d]+([a-z]+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+).*/ ) { $resource=$1 ; $held=$2 ; $maxheld=$3 ; $barrier=$4 ; $limit=$5 ; $failcnt=$6 ; ${beancounters_old{$vid}}{$resource}=[$held , $maxheld , $barrier , $limit ,$failcnt ]; } } foreach my $vmachine_id (keys %beancounters) { foreach my $resource (keys %{$beancounters{$vmachine_id}} ) { if ( defined($beancounters{$vmachine_id}{$resource}[4]) && defined($beancounters_old{$vmachine_id}{$resource}[4]) ){ my $failcnt=$beancounters{$vmachine_id}{$resource}[4]; my $failcnt_old=$beancounters_old{$vmachine_id}{$resource}[4]; my $held=$beancounters{$vmachine_id}{$resource}[0]; my $maxheld=$beancounters{$vmachine_id}{$resource}[1]; my $barrier=$beancounters{$vmachine_id}{$resource}[2]; my $limit=$beancounters{$vmachine_id}{$resource}[3]; if ( $failcnt_old < $failcnt ){ print "CRITICAL: Incrased failcnt $vmachine_id: $resource from $failcnt_old to $failcnt (held->$held , maxheld->$maxheld , barrier->$barrier , limit->$limit ) " ; $ret=2; } } } } # if ($ret == 0 ) { print "Ok. \n" ; } # print Dumper(%beancounters_old) ; # print "\n"; exit($ret); ' RET1=$? fi echo "$DATA" > $FILE ##################################################################################### ######### quota check ##################################################################################### DATA=`snmpwalk -v 3 -u $USER -l authPriv -a MD5 -A $PASS -x DES -X $PASS $HOST:$PORT .1.3.6.1.4.1.2021.52.4 \ | perl -ne '/"(.*)"/ ; print "$1\n" ;'` if [ "$?" != "0" ]; then echo "Unknown snmp error" exit 1 fi echo "$DATA" | perl -n -e' my $vid ; my $ret=0 ; while(<STDIN>){ my %vid; if ( /\D*(\d+):.*/ ){ $vid=$1; } if ( /\s*(\S+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+).*/ ){ $resource=$1 ; $usage=$2 ; $softlimit=$3 ; $hardlimit=$4 ; $time=$5 ; $expire=$6 ; if ( $usage >= $softlimit ){ print "WARNING: VZquota limit exceeded on $vid: $resource usage->$usage, softlimit->$softlimit, hardlimit->$hardlimit, time->$time, expire->$expire " ; $ret=1; } } } exit($ret); ' RET2=$? ##################################################################################### ########### return ##################################################################################### if [ $RET1 -gt $RET2 ]; then RET=$RET1 else RET=$RET2 fi if [ $RET = 0 ]; then echo Ok. fi exit $RET
После этого в Nagios2 появится мониторинг использования ресурсов виртуальных серверов.