MariaDB高可用架构之MHA--VIP切换，mariadbmha--vip

MariaDB高可用架构之MHA--VIP切换，mariadbmha--vip

长话短说，MHA搭建参考http://blog.csdn.net/sj349781478/article/details/78829711

本文使用脚本来管理VIP浮动（亲测）

1、为主节点添加VIP

# /sbin/ifconfig eth1:1 192.168.166.39 netmask 255.255.255.0  up

2、管理节点调用浮动VIP脚本

--------------------------------------------------------------

#cd /etc/mha_master

#vi app1.cnf 

[server default]
user=mhaadmin
password=Redhat
manager_workdir=/etc/mha_master/app1
manager_log=/etc/mha_master/manager.log
remote_workdir=/mydata/mha_master/app1
ssh_user=root
repl_user=repl
repl_password=repl
ping_interval=1
master_ip_failover_script=/etc/mha_master/master_ip_failover


[server1]
hostname=192.168.166.31
ssh_port=22
candidate_master=1


[server2]
hostname=192.168.166.32
ssh_port=22
candidate_master=1


[server3]
hostname=192.168.166.33
ssh_port=22
~

--------------------------------------------------------------

3、配置VIP脚本

-------------------------------------------------------------------

#cd /etc/mha_master

#vi master_ip_failover 

#!/usr/bin/env perl


use strict;
use warnings FATAL => 'all';


use Getopt::Long;


my (
    $command,          $ssh_user,        $orig_master_host, $orig_master_ip,
    $orig_master_port, $new_master_host, $new_master_ip,    $new_master_port
);


my $vip = '192.168.166.39/24';
my $key = '1';
my $ssh_start_vip = "/sbin/ifconfig eth1:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth1:$key down";


GetOptions(
    'command=s'          => \$command,
    'ssh_user=s'        => \$ssh_user,
    'orig_master_host=s' => \$orig_master_host,
    'orig_master_ip=s'  => \$orig_master_ip,
    'orig_master_port=i' => \$orig_master_port,
    'new_master_host=s'  => \$new_master_host,
    'new_master_ip=s'    => \$new_master_ip,
    'new_master_port=i'  => \$new_master_port,
);


exit &main();


sub main {


    print "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";


    if ( $command eq "stop" || $command eq "stopssh" ) {


        my $exit_code = 1;
        eval {
            print "Disabling the VIP on old master: $orig_master_host \n";
            &stop_vip();
            $exit_code = 0;
        };
        if ($@) {
            warn "Got Error: $@\n";
            exit $exit_code;
        }
        exit $exit_code;
    }
    elsif ( $command eq "start" ) {


        my $exit_code = 10;
        eval {
            print "Enabling the VIP - $vip on the new master - $new_master_host \n";
            &start_vip();
            $exit_code = 0;
        };
        if ($@) {
            warn $@;
            exit $exit_code;
        }
        exit $exit_code;
    }
    elsif ( $command eq "status" ) {
        print "Checking the Status of the script.. OK \n";
        exit 0;
    }
    else {
        &usage();
        exit 1;
    }
}


sub start_vip() {
    `ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
sub stop_vip() {
    return 0  unless  ($ssh_user);
    `ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}


sub usage {
    print
    "Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_master_ip=ip 
            --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n";
} 

------------------------------------------------------------------------

4、赋予脚本权限

#chmod 777   master_ip_failover

5、关闭主数据库，进行切换实验，完成。

参看文章：

MHA VIP切换脚本

MySQL高可用架构之MHA