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contrib-munin/plugins/netscaler/snmp__netscaler_cpu

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2011-05-10 12:07:11 +02:00
#!/usr/bin/perl
# -*- perl -*-
# ---------------------------------------------------- #
# File : netscaler_cpu
# Author: Sandro Wefel
# based on Script by Damien SIAUD
# Date : 05/05/2011
# Modified : 05/05/2011
# ---------------------------------------------------- #
# This script require Net::SNMP
#
# Netscaler plugin for munin
#
# License Information:
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ---------------------------------------------------- #
=head1 NAME
netscaler_cpu - Munin plugin to monitor CPU usage
=head1 CONFIGURATION
Make a symlink from netscaler_cpu_ to /etc/munin/plugins/netscaler_cpu_<nsfqdn>.
You can omit <nsfqdn>, then you need the env variable B<host>.
To configure the plugin, use ENV variables.
Add something lile this to /etc/munin/plugin-conf.d/<conf>
[netscaler_cpu_*]
env.community CommunityName
Variables:
=over
=item ENV B<host> netscaler host as FQDN or IP I<default is the nsfqdn-suffix from pluginname>
=item ENV B<port> I<default 161>
=item ENV B<community> I<default "public">
=item ENV B<timeout> in seconds I<default 5>
=back
=head1 AUTHORS
=over
=item Sandro Wefel <wefel@unixos.de>
=item based on scripts by Jimmy Olsen, Damien SIAUD
=back
=head1 LICENSE
GNU General Public License
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
use Net::SNMP;
use Munin::Plugin;
use vars qw($script_name $script_version $o_host $o_community $o_port $o_timeout);
use strict;
# --------------------------- globals -------------------------- #
$script_name = "netscaler_cpu";
$script_version = "0.1";
$o_host = undef;
$o_community = undef;
$o_port = 161;
my $return_str = "";
my @cpu_name = ();
# ---------------------------- snmp ---------------------------- #
my $oid_prefix = "1.3.6.1.4.1.5951";
my $oid_build_version = $oid_prefix.".4.1.1.1.0";
my $oid_avgcpu_usage = $oid_prefix.".4.1.1.41.1.0"; # cpu utilization (%)
my $oid_cpu_name = $oid_prefix.".4.1.1.41.6.1.1"; # name of cpu in NetScaler
my $oid_cpu_usage = $oid_prefix.".4.1.1.41.6.1.2"; # usage per cpu (%)
# ---------------------------- main ----------------------------- #
my $DEBUG = 0;
my $o_host = $ENV{host} || undef;
my $o_port = $ENV{port} || 161;
my $o_community = $ENV{community} || "public";
my $o_timeout = $ENV{timeout} || 5;
if ($ARGV[0] and $ARGV[0] eq "autoconf") {
print "yes\n";
exit 0;
}
if (! defined $o_host ) {
$0 =~ /netscaler_cpu_(.+)*$/;
$o_host = $1;
die "No host provided" unless defined $o_host;
}
# open session
my $session = &open_session();
if (!defined($session)) {
print "ERROR opening session\n";
exit 1;
}
# CPU names
if (&get_cpus($session) lt 1) {
print "ERROR getting number of CPUs\n";
exit 1;
};
if ($ARGV[0] and $ARGV[0] eq "config") {
print "graph_args --base 1024 -l 0 --upper-limit 100\n";
print "graph_vlabel %\n";
print "graph_scale no\n";
print "graph_title CPU usage for $o_host\n";
print "graph_category loadbalancer\n";
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print "graph_period second\n";
print "graph_info This graph shows how CPU time is spent.\n";
print "avg.label avg\n";
print "avg.draw AREA\n";
print "avg.info Average load.\n";
foreach my $v (@cpu_name){
print $v.".label ".$v."\n";
print $v.".draw LINE2\n";
print $v.".info CPU usage of ".$v."\n";
print_thresholds($v);
}
for my $field qw(avg) {
print_thresholds($field);
}
&close_session($session);
exit 0;
}
# Average
&get_avgcpu_usage($session);
# per CPU usage
&get_cpu_usage($session);
&close_session($session);
print "$return_str";
exit 0;
# --------------------------- functions ------------------------- #
sub open_session {
my ($sess, $str) = Net::SNMP->session(
-hostname => $o_host,
-community => $o_community,
-port => $o_port,
-timeout => $o_timeout
);
$return_str = $str;
return $sess;
}
sub close_session {
my ($sess) = @_;
if(defined($sess)){
$session->close;
}
}
sub get_buildversion {
my ($session) = @_;
my $build_version;
my $result = $session->get_request(
-varbindlist => [$oid_build_version]
);
if (!defined($result)) {
return "na";
}
else {
$build_version = $result->{$oid_build_version};
return"Build version : ".$build_version;
}
}
sub get_avgcpu_usage {
my ($session) = @_;
my $cpu_usage;
my $result = $session->get_request(
-varbindlist => [$oid_avgcpu_usage]
);
if (!defined($result)) {
$return_str = "na";
}
else {
$cpu_usage = $result->{$oid_avgcpu_usage};
$return_str .= "avg.value ".$cpu_usage."\n";
}
}
sub get_cpu_usage {
my ($session) = @_;
my %cpu_usage;
my $index=0;
my $result = $session->get_table(-baseoid => $oid_cpu_usage);
if (!defined($result)) {
return "na";
}
else {
foreach my $v ($session->var_bind_names()){
$cpu_usage{$cpu_name[$index]} = $session->var_bind_list()->{$v};
$return_str .= $cpu_name[$index] . ".value ".$cpu_usage{$cpu_name[$index]}."\n";
$index++;
}
}
}
sub get_cpus {
my ($session) = @_;
my %cpu_usage;
my $result = $session->get_table(-baseoid => $oid_cpu_name);
if (!defined($result)) {
return 0;
}
else {
@cpu_name = ();
foreach my $n ($session->var_bind_names()) {
push @cpu_name, $session->var_bind_list()->{$n};
}
}
my $number=@cpu_name;
return $number;
}