set_state

mysql+ha. 实现高可用性 http://code.google.com/p/mysql-master-master/

#!/usr/bin/env perl

# Use mandatory external modules
use strict;
use Cwd;
use File::Basename;
use Data::Dumper;
use POSIX;
use Config;
use DBI;

# Determine installation dir name
our $SELF_DIR = dirname(dirname(dirname(Cwd::abs_path(__FILE__))));

# Include parts of the system
require $SELF_DIR . '/lib/config.pm';
require $SELF_DIR . '/lib/log.pm';
require $SELF_DIR . '/lib/roles.pm';

# Read config file
our $config = ReadConfig("mmm_agent.conf");

if (scalar(@ARGV) < 2) {
    print "Usage: $0 <old_state> <new_state>\n\n";
    exit(1);
}

my $old_state = $ARGV[0];
my $new_state = $ARGV[1];

my $res = SetState($old_state, $new_state);

print "$res\n";
exit(0);

#-----------------------------------------------------------------
sub SetState($$) {
    my $old_state = shift;
    my $new_state = shift;
    
    if ($new_state eq 'ADMIN_OFFLINE') {
        LogDebug("Turning off slave in this host");
	    ExecuteBin("turn_off_slave");
	    return "OK: state changed to ADMIN_OFFLINE";
    }
    
    if ($old_state eq 'ADMIN_OFFLINE') {
        LogDebug("Turning on slave in this host");
	    ExecuteBin("turn_on_slave");
	    return "OK: state changed from ADMIN_OFFLINE";
    }
    
    return "OK: state changed!";
}