--- percona-server-5.6.20-68.0/scripts/mysqldumpslow.sh~	2014-08-29 10:58:05.000000000 +0300
+++ percona-server-5.6.20-68.0/scripts/mysqldumpslow.sh	2014-09-06 20:50:22.000000000 +0300
@@ -51,8 +51,33 @@
 
 $opt{'help'} and usage();
 
+# find config file for first defined cluster
+sub get_defaults_file {
+	my $clusters_file = '/etc/mysql/clusters.conf';
+	return unless -f $clusters_file;
+
+	open(my $fh , "< $clusters_file") or return;
+	while (<$fh>) {
+		my ($config, $clusterdir) = m{^([^#]+)\s*=\s*(.+)$};
+		next unless $config;
+
+		if ($config !~ m{/}) {
+			my $f = "/etc/mysql/$config";
+			return $f if -f $f;
+
+			my $f = "$clusterdir/$config";
+			return $f if -f $f;
+		}
+		return $config;
+	}
+	close($fh) or die $!;
+	return undef;
+}
+
 unless (@ARGV) {
-    my $defaults   = `my_print_defaults mysqld`;
+	my $defaults_file = get_defaults_file;
+	my $defaults_arg = "-c $defaults_file" if $defaults_file;
+   my $defaults   = `my_print_defaults $defaults_arg mysqld`;
     my $basedir = ($defaults =~ m/--basedir=(.*)/)[0]
 	or die "Can't determine basedir from 'my_print_defaults mysqld' output: $defaults";
     warn "basedir=$basedir\n" if $opt{v};
@@ -61,7 +86,7 @@
     my $slowlog = ($defaults =~ m/--slow-query-log-file=(.*)/)[0];
     if (!$datadir or $opt{i}) {
 	# determine the datadir from the instances section of /etc/my.cnf, if any
-	my $instances  = `my_print_defaults instances`;
+	my $instances  = `my_print_defaults $defaults_arg instances`;
 	die "Can't determine datadir from 'my_print_defaults mysqld' output: $defaults"
 	    unless $instances;
 	my @instances = ($instances =~ m/^--(\w+)-/mg);