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