/usr/bin/masterha_secondary_check is in mha4mysql-manager 0.53-3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | #!/usr/bin/env perl
# Copyright (C) 2011 DeNA Co.,Ltd.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use Getopt::Long;
use Pod::Usage;
use MHA::ManagerConst;
my @monitoring_servers;
my ( $help, $version, $ssh_user, $ssh_port, $ssh_options, $master_host,
$master_ip, $master_port );
$| = 1;
GetOptions(
'help' => \$help,
'version' => \$version,
'secondary_host=s' => \@monitoring_servers,
'user=s' => \$ssh_user,
'port=s' => \$ssh_port,
'options=s' => \$ssh_options,
'master_host=s' => \$master_host,
'master_ip=s' => \$master_ip,
'master_port=i' => \$master_port,
);
if ($version) {
print "masterha_secondary_check version $MHA::ManagerConst::VERSION.\n";
exit 0;
}
if ($help) {
pod2usage(0);
}
unless ($master_host) {
pod2usage(1);
}
$ssh_user = "root" unless ($ssh_user);
$ssh_port = 22 unless ($ssh_port);
$master_port = 3306 unless ($master_port);
if ($ssh_options) {
$MHA::ManagerConst::SSH_OPT_CHECK = $ssh_options;
}
sub exit_by_signal {
exit 1;
}
local $SIG{INT} = $SIG{HUP} = $SIG{QUIT} = $SIG{TERM} = \&exit_by_signal;
# 0: master is not reachable from all monotoring servers
# 1: unknown errors
# 2: at least one of monitoring servers is not reachable from this script
# 3: master is reachable from at least one of monitoring servers
my $exit_code = 0;
foreach my $monitoring_server (@monitoring_servers) {
my $ssh_user_host = $ssh_user . '@' . $monitoring_server;
my $command =
"ssh $MHA::ManagerConst::SSH_OPT_CHECK -p $ssh_port $ssh_user_host \"perl -e "
. "\\\"use IO::Socket::INET; my \\\\\\\$sock = IO::Socket::INET->new"
. "(PeerAddr => \\\\\\\"$master_host\\\\\\\", PeerPort=> $master_port, "
. "Proto =>'tcp', Timeout => 4); if(\\\\\\\$sock) { close(\\\\\\\$sock); "
. "exit 3; } exit 0;\\\" \"";
my $ret = system($command);
$ret = $ret >> 8;
if ( $ret == 0 ) {
print
"Monitoring server $monitoring_server is reachable, Master is not reachable from $monitoring_server. OK.\n";
next;
}
if ( $ret == 3 ) {
print "Master is reachable from $monitoring_server!\n";
$exit_code = 3;
last;
}
else {
print "Monitoring server $monitoring_server is NOT reachable!\n";
$exit_code = 2;
last;
}
}
exit $exit_code;
# ############################################################################
# Documentation
# ############################################################################
=pod
=head1 NAME
masterha_secondary_check - Checking master availability from additional network routes
=head1 SYNOPSIS
masterha_secondary_check -s secondary_host1 -s secondary_host2 .. --user=ssh_username --master_host=host --master_ip=ip --master_port=port
See online reference (http://code.google.com/p/mysql-master-ha/wiki/Parameters#secondary_check_script) for details.
=head1 DESCRIPTION
See online reference (http://code.google.com/p/mysql-master-ha/wiki/Parameters#secondary_check_script) for details.
|