Difference between revisions of "Monitoring openvz resources using nagios and snmp"

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(→‎nagios configuration)
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== nagios configuration ==
 
== nagios configuration ==
 
=== nagios plugin ===
 
=== nagios plugin ===
 +
It is shell script:
 +
<pre>
 +
# cat /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=`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 \
 +
|  perl -ne '/"(.*)"/ ; print "$1\n" ;'`
 +
 +
if [ "$?" != "0" ]; then
 +
        echo "Unknown snmp error"
 +
        exit 1
 +
fi
 +
 +
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 ) \n" ;
 +
                        $ret=1;
 +
                }
 +
        }
 +
}
 +
 +
# read and parse old data
 +
open(MYINPUTFILE, "<$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 ) \n" ;
 +
                                $ret=2;
 +
                        }
 +
                }
 +
        }
 +
 +
}
 +
 +
if ($ret == 0 ) { print "Ok. \n" ; }
 +
# print Dumper(%beancounters_old) ;
 +
exit($ret);
 +
'
 +
 +
RET=$?
 +
fi
 +
 +
echo "$DATA" > $FILE
 +
 +
exit $RET
 +
</pre>

Revision as of 07:56, 4 October 2006

snmpd configuration

Debian Etch example: 

apt-get install snmpd

edit /etc/default/snmpd : remove -u snmp and repleace 127.0.0.1 witch your ip, Full/etc/default/snmpd example: 

export MIBDIRS=/usr/share/snmp/mibs
SNMPDRUN=yes
SNMPDOPTS='-Lsd -Lf /dev/null  -I -smux -p /var/run/snmpd.pid 207.46.250.119'
TRAPDRUN=no
TRAPDOPTS='-Lsd -p /var/run/snmptrapd.pid'

Create user(my_username) and add new mib: 

/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  createUser my_username MD5 my_password DES >> /var/lib/snmp/snmpd.conf
/etc/init.d/snmpd start

Testing snmp: 

snmpwalk   -v 3  -u my_usrname -l authPriv   -a MD5 -A my_password -x DES -X my_password  207.46.250.119

nagios configuration

nagios plugin

It is shell script: 

# cat /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=`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 \
|  perl -ne '/"(.*)"/ ; print "$1\n" ;'`

if [ "$?" != "0" ]; then
        echo "Unknown snmp error"
        exit 1
fi

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 ) \n" ;
                        $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 ) \n" ;
                                $ret=2;
                        }
                }
        }

}

if ($ret == 0 ) { print "Ok. \n" ; }
# print Dumper(%beancounters_old) ;
exit($ret);
'

RET=$?
fi

echo "$DATA" > $FILE

exit $RET
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