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https://github.com/percona/percona-toolkit.git
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91 lines
3.0 KiB
Perl
91 lines
3.0 KiB
Perl
# This program is copyright 2012 Percona Inc.
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# Feedback and improvements are welcome.
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#
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# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
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# systems, you can issue `man perlgpl' or `man perlartistic' to read these
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# licenses.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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# Place, Suite 330, Boston, MA 02111-1307 USA.
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# ###########################################################################
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# Percona::XtraDB::Cluster package
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# ###########################################################################
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{
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# Package: Percona::XtraDB::Cluster
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# Helper methods for dealing with Percona XtraDB Cluster nodes.
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package Percona::XtraDB::Cluster;
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use strict;
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use warnings FATAL => 'all';
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use English qw(-no_match_vars);
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use constant PTDEBUG => $ENV{PTDEBUG} || 0;
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use Mo;
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use Data::Dumper;
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sub get_cluster_name {
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my ($self, $cxn) = @_;
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my $sql = "SHOW VARIABLES LIKE 'wsrep\_cluster\_name'";
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PTDEBUG && _d($cxn->name, $sql);
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my (undef, $cluster_name) = $cxn->dbh->selectrow_array($sql);
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return $cluster_name;
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}
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sub is_cluster_node {
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my ($self, $cxn) = @_;
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my $sql = "SHOW VARIABLES LIKE 'wsrep\_on'";
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PTDEBUG && _d($cxn->name, $sql);
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my $row = $cxn->dbh->selectrow_arrayref($sql);
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PTDEBUG && _d(Dumper($row));
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return unless $row && $row->[1] && ($row->[1] eq 'ON' || $row->[1] eq '1');
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my $cluster_name = $self->get_cluster_name($cxn);
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return $cluster_name;
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}
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sub same_node {
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my ($self, $cxn1, $cxn2) = @_;
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my $sql = "SHOW VARIABLES LIKE 'wsrep\_sst\_receive\_address'";
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PTDEBUG && _d($cxn1->name, $sql);
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my (undef, $val1) = $cxn1->dbh->selectrow_array($sql);
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PTDEBUG && _d($cxn2->name, $sql);
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my (undef, $val2) = $cxn2->dbh->selectrow_array($sql);
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return ($val1 || '') eq ($val2 || '');
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}
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sub same_cluster {
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my ($self, $cxn1, $cxn2) = @_;
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# They can't be the same cluster if one of them isn't in a cluster.
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return 0 if !$self->is_cluster_node($cxn1) || !$self->is_cluster_node($cxn2);
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my $cluster1 = $self->get_cluster_name($cxn1);
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my $cluster2 = $self->get_cluster_name($cxn2);
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return ($cluster1 || '') eq ($cluster2 || '');
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}
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sub _d {
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my ($package, undef, $line) = caller 0;
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@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
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map { defined $_ ? $_ : 'undef' }
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@_;
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print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
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}
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1;
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}
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# ###########################################################################
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# End Percona::XtraDB::Cluster package
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# ###########################################################################
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