neuer versuch mit munin für immer1-5

git-svn-id: https://rfd.cronopios.org/ipuppet/trunk/modules/munin@662 d66ca3ae-40d7-4aa7-90d4-87d79ca94279

1 files changed, 142 insertions, 0 deletions

diff --git a/files/plugins/pg__connections b/files/plugins/pg__connections
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+#!/usr/bin/perl -w
+# Plugin for monitor postgres 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/pg__connections \
+#         /etc/munin/plugins/pg_<databasename>_connections
+#       This should, however, be given through autoconf and suggest.
+#
+#       If required, give username, password and/or Postgresql server
+#       host through environment variables.
+#
+#       You must also activate Postgresql statistics. See
+#       http://www.postgresql.org/docs/7.4/interactive/monitoring-stats.html
+#       for how to enable this. Specifically, the following lines must
+#       exist in your postgresql.conf:
+#
+#           stats_start_collector = true
+#           stats_block_level = true
+#
+#
+# Parameters:
+#
+#       config   (required)
+#
+# Config variables:
+#
+#       dbhost     - Which database server to use. Defaults to
+#                    'localhost'.
+#       dbname     - Which database to use. Defaults to template1
+#       dbuser     - A Postgresql user account with read permission to
+#                    the given database. Defaults to
+#                    'postgres'. Anyway, Munin must be told which user
+#                    this plugin should be run as.
+#       dbpass     - The corresponding password, if
+#                    applicable. Default to undef. Remember that
+#                    pg_hba.conf must be configured accordingly.
+#
+# Magic markers
+#%# family=auto
+#%# capabilities=autoconf
+
+use strict;
+use DBI;
+
+my $dbhost = $ENV{'dbhost'} || '127.0.0.1';
+my $dbname = $ENV{'dbname'} || 'template1';
+my $dbuser = $ENV{'dbuser'} || 'postgres';
+my $dbuserx = $ENV{'dbuserx'} || '';
+my $dbport = $ENV{'dbport'} || '5432';
+my $dbpass = $ENV{'dbpass'} || '';
+
+# Check for DBD::Pg
+if (! eval "require DBD::Pg;") {
+	print "requires DBD::Pg\n";
+     exit 1;
+}
+
+my $dsn = "DBI:Pg:dbname=$dbname;host=$dbhost;port=$dbport";
+#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::Pg
+	if (! eval "require DBD::Pg;") {
+	     print "no (DBD::Pg 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 = "SHOW max_connections;";
+        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 PostgresSQL active connections\n";
+        print "graph_args -l 0 --base 1000\n";
+        print "graph_vlabel Connections\n";
+        print "graph_category Postgresql\n";
+        print "graph_info Shows active Postgresql connections from $dbname\n";
+	
+
+	my $sql = "select datname, count(*) from pg_stat_activity group by datname";
+	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";
+		}
+	}
+
+        print "max_connections.label Max. connections\n";
+        print "max_connections.info Max. connections\n";
+        print "max_connections.type GAUGE\n";
+
+        print "warning $warning\n";
+        print "critical $critical\n";
+	exit 0;
+    }
+}
+
+
+# select datname, count(*) from pg_stat_activity group by datname
+my $sql_max = "SHOW max_connections;";
+my $sth_max = $dbh->prepare($sql_max);
+$sth_max->execute();
+my ($max_connections) = $sth_max->fetchrow();
+
+#my $sql = "SELECT COUNT (*) FROM pg_stat_activity;";
+my $sql = "select datname, count(*) from pg_stat_activity group by datname";
+my $sth = $dbh->prepare($sql);
+$sth->execute();
+while ( my ($datname,$curr_conn) = $sth->fetchrow_array ) {
+	print "$datname.value $curr_conn\n";
+}
+print "max_connections.value $max_connections\n";