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- have some dirs

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Steve Schnepp 2012-02-13 18:24:46 +01:00
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plugins/oracle/oracle__connections Executable file
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#!/usr/bin/perl -w
# Plugin for monitor oracle connections.
#
# Licenced under GPL v2.
#
# Usage:
#
# Symlink into /etc/munin/plugins/ and add the monitored
# database to the filename. e.g.:
#
# ln -s /usr/share/munin/plugins/oracle__connections \
# /etc/munin/plugins/oracle_<databasename>_connections
# This should, however, be given through autoconf and suggest.
#
# If required, give username, password and/or oracle server
# host through environment variables.
#
#
# Parameters:
# autoconf
# config (required)
#
# Config variables:
#
# dbhost - Which database server to use. Defaults to
# 'localhost'.
# dbname - Which database to use. Defaults to orcl
# dbuser - A oracle user account with read permission to
# the v$session view. Defaults to
# 'oracle'. Anyway, Munin must be told which user
# this plugin should be run as.
# dbpass - The corresponding password, if
# applicable. Default to undef.
#
# showusers - If set to 1 show usernames and num. of connections.
# Default is not show users (0).
# Magic markers
#%# family=auto
#%# capabilities=autoconf
use strict;
use DBI;
my $dbhost = $ENV{'dbhost'} || '127.0.0.1';
my $dbname = $ENV{'dbname'} || 'orcl';
my $dbuser = $ENV{'dbuser'} || 'oracle';
my $dbport = $ENV{'dbport'} || '1521';
my $dbpass = $ENV{'dbpass'} || '';
my $showusers = $ENV{'showusers'} || '0';
# Check for DBD::Oracle
if (! eval "require DBD::Oracle;") {
exit 1;
}
my $dsn = "DBI:Oracle:dbname=$dbname;host=$dbhost;port=$dbport;sid=$dbname";
#print "$dsn\n";
my $dbh = DBI->connect ($dsn, $dbuser,
$dbpass,
{RaiseError =>1}) || die "";
if (exists $ARGV[0]) {
if ($ARGV[0] eq 'autoconf') {
# Check for DBD::Oracle
if (! eval "require DBD::Oracle;") {
print "no (DBD::Oracle not found)";
exit 1;
}
if ($dbh) {
print "yes\n";
exit 0;
} else {
print "no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr;
exit 1;
}
}
if ($ARGV[0] eq "config") {
my $sql_max = "select value from v\$parameter where name = 'sessions'";
my $sth_max = $dbh->prepare($sql_max);
$sth_max->execute();
my ($max_connections) = $sth_max->fetchrow();
my $warning = int ($max_connections * 0.7);
my $critical = int ($max_connections * 0.8);
print "graph_title Oracle active connections from $dbname\n";
print "graph_args -l 0 --base 1000\n";
print "graph_vlabel Connections\n";
print "graph_category oracle\n";
print "graph_info Shows active oracle connections from $dbname\n";
print "graph_scale no\n";
if ( $showusers ) {
my $sql = "select username, count(username) from v\$session where username is not null group by username";
my $sth = $dbh->prepare($sql);
$sth->execute();
my $setarea = "yes";
while ( my ($datname,$curr_conn) = $sth->fetchrow_array ) {
print "$datname.label $datname active connections\n";
print "$datname.info $datname active connections\n";
print "$datname.type GAUGE\n";
if ($setarea eq "yes") {
print "$datname.draw AREA\n";
$setarea="";
} else {
print "$datname.draw STACK\n";
}
}
} else {
print "connections.label active connections\n";
print "connections.info active connections\n";
print "connections.type GAUGE\n";
print "connections.warning $warning\n";
print "connections.critical $critical\n";
}
print "total.label active connections\n";
print "total.info active connections\n";
print "total.type GAUGE\n";
print "total.warning $warning\n";
print "total.critical $critical\n";
print "max_connections.label Max. connections\n";
print "max_connections.info Max. connections\n";
print "max_connections.type GAUGE\n";
exit 0;
}
}
my $sql_max = "select value from v\$parameter where name = 'sessions'";
my $sth_max = $dbh->prepare($sql_max);
$sth_max->execute();
my ($max_connections) = $sth_max->fetchrow();
if ( $showusers ) {
my $sql = "select username, count(username) from v\$session where username is not null group by username";
my $sth = $dbh->prepare($sql);
$sth->execute();
my $total = 0;
while ( my ($datname,$curr_conn) = $sth->fetchrow_array ) {
print "$datname.value $curr_conn\n";
$total = $total+$curr_conn;
}
print "total.value $total\n";
} else {
my $sql = "select count(username) from v\$session where username is not null";
my $sth = $dbh->prepare($sql);
$sth->execute();
my ($curr_conn) = $sth->fetchrow_array;
print "connections.value $curr_conn\n";
}
print "max_connections.value $max_connections\n";