Net-SNMP subagent

2009-03-06T17:28:22Z

AlexKuklin: New page: Here is snmp subagent to export UBC via SNMP protocol. Author - n1ckname === /etc/snmp/snmpagent.pl === #!/usr/bin/perl $program = $0; use NetSNMP::OID (':all'); use Net...

Here is snmp subagent to export UBC via SNMP protocol.

Author - n1ckname

=== /etc/snmp/snmpagent.pl ===

#!/usr/bin/perl

$program = $0;

use NetSNMP::OID (':all');
use NetSNMP::agent (':all');
use NetSNMP::ASN (':all');
use Data::Dumper;
my $debug = 0;
my @resName=qw(name vmguarpages tcpsndbuf othersockbuf physpages numfile numtcpsock numpty numsiginfo tcprcvbuf dcachesize numiptent numothersock privvmpages kmemsize numflock shmpages lockedpages dummy numproc oomguarpages dgramrcvbuf);
my @catName=qw(held maxheld barrier limit failcnt);
my %resIndex,%catIndex;
@resIndex{@resName} = (0..$#resName);
@catIndex{@catName} = (0..$#catName);

sub handler {
my ($handler, $reg_info, $request_info, $requests) = @_;
open(UB,"<$source");
while(<UB>){
my %vmachine;
if ( /\D*(\d+):[\s\t]+([a-z]+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+).*/ ){
$vid=$1;
$beancounters{$vid}=\%vmachine ;
${beancounters{$vid}{0}}="www";
open(CONF,"</etc/vz/conf/$vid.conf");
my $name=$vid;
while(<CONF>) {
if(/NAME[\s\t]?=[\s\t]?["]?([^"]+)["]?/) {
$name=$1;
last;
#"
}
}
${beancounters{$vid}{0}}=$name;
$resource=$2 ;
$held=$3 ;
$maxheld=$4 ;
$barrier=$5 ;
$limit=$6 ;
$failcnt=$7 ;
${beancounters{$vid}}{${resIndex{$resource}}}=[$held , $maxheld , $barrier , $limit ,$failcnt ];

}
if ( /^[\W\d]+([a-z]+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+)[\t\s]+(\d+).*/ ) {
$resource=$1 ;
$held=$2 ;
$maxheld=$3 ;
$barrier=$4 ;
$limit=$5 ;
$failcnt=$6 ;
${beancounters{$vid}}{${resIndex{$resource}}}=[$held , $maxheld , $barrier , $limit ,$failcnt ];
}
}
close(UB);

for ( my $request = $requests; $request; $request = $request->next() ) {

my $reqOID = $request->getOID();
my $reqMode = $request_info->getMode();
my $myOID = new NetSNMP::OID($OID);
#1.3.6.1.4.1.2021.51.ctcount = 5
#1.3.6.1.4.1.2021.51.ct.101.name = www
#1.3.6.1.4.1.2021.51.ct.101.kmemsize.held = 458584
#1.3.6.1.4.1.2021.51.ct.101.kmemsize.maxheld = 1490364
#1.3.6.1.4.1.2021.51.ct.101.kmemsize.barrier = 11055923

# $request->setValue(ASN_INTEGER, scalar keys (%beancounters));

if ($reqMode == MODE_GET) {
print STDERR $reqOID." MODE_GET\n" if($debug);;
if($reqOID == $myOID+".0"){
$request->setValue(ASN_INTEGER, scalar keys (%beancounters));
} elsif($reqOID =~ /$myOID\.([0-9]+)[\.]?([0-9]+)?[\.]?([0-9]+)?[\.]?([0-9]+)?/) {

my $typeReq=$1;
my $vzidReq=$2;
my $resReq=$3;
my $catReq=$4;
my %vz;

print STDERR "Type:$typeReq, VzID: $vzidReq, Res: $resReq/$resName[$resReq], Cat: $catReq/$catName[$catReq]\n" if($debug);;

if(!$vzidReq) {
foreach $vzid (sort keys %beancounters) {
$vzidReq=$vzid;
last;
}
}
if(!$vzidReq || !exists(${beancounters{$vzidReq}})) {
$request->setError($request_info,SNMP_ERR_NOSUCHNAME);
last;
}

%vz=%{${beancounters{$vzidReq}}};

if((!defined($resReq) or $resReq == 0) && defined(${vz{0}})) {
$request->setValue(ASN_OCTET_STR, "".${vz{0}});
} elsif(!defined($catReq) && defined(${vz{$resReq}[0]})) {
$request->setValue(ASN_INTEGER, ${vz{$resReq}[0]});

} elsif($catReq< $#catName && defined(${vz{$resReq}[$catReq]})) {
if(9223372036854775807 == ${vz{$resReq}[$catReq+1]}) {
$request->setValue(ASN_INTEGER,-1);
} else {
$request->setValue(ASN_INTEGER,${vz{$resReq}[$catReq+1]});
}
} elsif($resReq<scalar keys %vz && defined(${vz{$resReq+1}[0]})) {
if(9223372036854775807 == ${vz{$resReq}[$catReq+1]}) {
$request->setValue(ASN_INTEGER,-1);
} else {
$request->setValue(ASN_INTEGER, ${vz{$resReq+1}[0]});
}
} else {
my $finish=1;
foreach $vzid (sort keys %beancounters) {
if($vzid > $vzidReq) {
%vz=%{${beancounters{$vzid}}};
$vzidReq=$vzid;
$finish=0;
last;
}
}
if(!$finish) {
$request->setValue(ASN_INTEGER, "".${vz{0}});
}
}

}

} elsif ($reqMode == MODE_GETNEXT) {
print STDERR $reqOID." MODE_GETNEXT\n" if($debug);
if($reqOID < $myOID+".0"){
$request->setOID($OID.".0");
$request->setValue(ASN_INTEGER, scalar keys (%beancounters));
} elsif($reqOID =~ /$myOID\.([0-9]+)[\.]?([0-9]+)?[\.]?([0-9]+)?[\.]?([0-9]+)?$/) {
my $typeReq=$1;
my $vzidReq=$2;
my $resReq=$3;
my $catReq=$4;
my %vz;

print STDERR "Type:$typeReq, VzID: $vzidReq, Res: $resReq/$resName[$resReq], Cat: $catReq/$catName[$catReq]\n" if($debug);;

if(!$vzidReq) {
foreach $vzid (sort keys %beancounters) {
$vzidReq=$vzid;
last;
}
}
if(!$vzidReq || !exists(${beancounters{$vzidReq}})) {
$request->setError($request_info,SNMP_ERR_NOSUCHNAME);
last;
}

%vz=%{${beancounters{$vzidReq}}};

if(!defined($resReq) && defined(${vz{0}})) {
$request->setOID($myOID.".1.".$vzidReq.".0");
$request->setValue(ASN_OCTET_STR, "".${vz{0}});
} elsif(!defined($catReq) && defined(${vz{$resReq}[0]})) {
$request->setOID($myOID.".1.".$vzidReq.".".$resReq.".0");
$request->setValue(ASN_INTEGER, ${vz{$resReq}[0]});
} elsif($catReq< $#catName && defined(${vz{$resReq}[$catReq]})) {
$request->setOID($myOID.".1.".$vzidReq.".".$resReq.".".($catReq+1));
if(9223372036854775807 == ${vz{$resReq}[$catReq+1]}) {
$request->setValue(ASN_INTEGER,-1);
} else {
$request->setValue(ASN_INTEGER,${vz{$resReq}[$catReq+1]});
}
} elsif($resReq<scalar keys %vz && defined(${vz{$resReq+1}[0]})) {
$request->setOID($myOID.".1.".$vzidReq.".".($resReq+1).".0");
if(9223372036854775807 == ${vz{$resReq}[$catReq+1]}) {
$request->setValue(ASN_INTEGER,-1);
} else {
$request->setValue(ASN_INTEGER, ${vz{$resReq+1}[0]});
}
} else {
my $finish=1;
foreach $vzid (sort keys %beancounters) {
if($vzid > $vzidReq) {
%vz=%{${beancounters{$vzid}}};
$vzidReq=$vzid;
$finish=0;
last;
}
}
if(!$finish) {
$request->setOID($myOID.".1.".$vzidReq.".0.0");
$request->setValue(ASN_OCTET_STR, ${vz{0}});
}
}
}
}
}
}

{
my $regoid = new NetSNMP::OID($OID);
$agent->register($program, $regoid, \&handler);
}

#eof // nick

=== /etc/snmp/snmpd.conf ===

rouser my_username priv
createUser my_username MD5 my_password DES
perl $OID = '.1.3.6.1.4.1.2021.51';
perl $debugging = '1';
perl $verbose = '1';
perl $source = '/proc/user_beancounters';
perl do "/etc/snmp/snmpagent.pl";

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