MHA 实现VIP切换用到脚本

在MHA Manager端配置中，如果实现MHA的vip故障切换需要在配置文件/etc/masterha/app1/app1.cnf 中启用下面三个参数：

master_ip_failover_script= /etc/masterha/app1/master_ip_failover   #master failover时执行
#shutdown_script= /etc/masterha/power_manager
report_script= /etc/masterha/app1/send_report    #master failover时执行
master_ip_online_change_script=/etc/masterha/app1/master_ip_online_change   #master switchover时执行

MHA配置见：http://blog.csdn.net/lichangzai/article/details/50470771

脚本具体内容如下：

master_ip_failover(perl)脚本

[root@host8 app1]# cat 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 = '10.1.5.21/24';  # Virtual IP
    my $key = "1";
    my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
    my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
    my $exit_code = 0;
     
    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" ) {
     
            # $orig_master_host, $orig_master_ip, $orig_master_port are passed.
            # If you manage master ip address at global catalog database,
            # invalidate orig_master_ip here.
            my $exit_code = 1;
            eval {
                print "\n\n\n***************************************************************\n";
                print "Disabling the VIP - $vip on old master: $orig_master_host\n";
                print "***************************************************************\n\n\n\n";
    &stop_vip();
                $exit_code = 0;
            };
            if ($@) {
                warn "Got Error: $@\n";
                exit $exit_code;
            }
            exit $exit_code;
    }
    elsif ( $command eq "start" ) {
     
            # all arguments are passed.
            # If you manage master ip address at global catalog database,
            # activate new_master_ip here.
            # You can also grant write access (create user, set read_only=0, etc) here.
    my $exit_code = 10;
            eval {
                print "\n\n\n***************************************************************\n";
                print "Enabling the VIP - $vip on new master: $new_master_host \n";
                print "***************************************************************\n\n\n\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";
            `ssh $ssh_user\@$orig_master_host \" $ssh_start_vip \"`;
            exit 0;
    }
    else {
    &usage();
            exit 1;
    }
    }
     
    # A simple system call that enable the VIP on the new master
    sub start_vip() {
    `ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
    }
    # A simple system call that disable the VIP on the old_master
    sub stop_vip() {
    `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=po
    rt –new_master_host=host –new_master_ip=ip –new_master_port=port\n";
    }

master_ip_online_change(perl)脚本

[root@host8 app1]# cat master_ip_online_change

#!/usr/bin/env perl
    use strict;
    use warnings FATAL =>'all';
     
    use Getopt::Long;
     
    my $vip = '10.1.5.21/24';  # Virtual IP
    my $key = "1";
    my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
    my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
    my $exit_code = 0;
     
    my (
      $command,              $orig_master_is_new_slave, $orig_master_host,
      $orig_master_ip,       $orig_master_port,         $orig_master_user,
      $orig_master_password, $orig_master_ssh_user,     $new_master_host,
      $new_master_ip,        $new_master_port,          $new_master_user,
      $new_master_password,  $new_master_ssh_user,
    );
    GetOptions(
      'command=s'                => \$command,
      'orig_master_is_new_slave' => \$orig_master_is_new_slave,
      'orig_master_host=s'       => \$orig_master_host,
      'orig_master_ip=s'         => \$orig_master_ip,
      'orig_master_port=i'       => \$orig_master_port,
      'orig_master_user=s'       => \$orig_master_user,
      'orig_master_password=s'   => \$orig_master_password,
      'orig_master_ssh_user=s'   => \$orig_master_ssh_user,
      'new_master_host=s'        => \$new_master_host,
      'new_master_ip=s'          => \$new_master_ip,
      'new_master_port=i'        => \$new_master_port,
      'new_master_user=s'        => \$new_master_user,
      'new_master_password=s'    => \$new_master_password,
      'new_master_ssh_user=s'    => \$new_master_ssh_user,
    );
     
     
    exit &main();
     
    sub main {
     
    #print "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";
     
    if ( $command eq "stop" || $command eq "stopssh" ) {
     
            # $orig_master_host, $orig_master_ip, $orig_master_port are passed.
            # If you manage master ip address at global catalog database,
            # invalidate orig_master_ip here.
            my $exit_code = 1;
            eval {
                print "\n\n\n***************************************************************\n";
                print "Disabling the VIP - $vip on old master: $orig_master_host\n";
                print "***************************************************************\n\n\n\n";
    &stop_vip();
                $exit_code = 0;
            };
            if ($@) {
                warn "Got Error: $@\n";
                exit $exit_code;
            }
            exit $exit_code;
    }
    elsif ( $command eq "start" ) {
     
            # all arguments are passed.
            # If you manage master ip address at global catalog database,
            # activate new_master_ip here.
            # You can also grant write access (create user, set read_only=0, etc) here.
    my $exit_code = 10;
            eval {
                print "\n\n\n***************************************************************\n";
                print "Enabling the VIP - $vip on new master: $new_master_host \n";
                print "***************************************************************\n\n\n\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";
            `ssh $orig_master_ssh_user\@$orig_master_host \" $ssh_start_vip \"`;
            exit 0;
    }
    else {
    &usage();
            exit 1;
    }
    }
     
    # A simple system call that enable the VIP on the new master
    sub start_vip() {
    `ssh $new_master_ssh_user\@$new_master_host \" $ssh_start_vip \"`;
    }
    # A simple system call that disable the VIP on the old_master
    sub stop_vip() {
    `ssh $orig_master_ssh_user\@$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=po
    rt –new_master_host=host –new_master_ip=ip –new_master_port=port\n";
    }

master_ip_online_change(shell)脚本

#以下是重用写的master_ip_online_change(shell)脚本
[root@host8 app1]# cat master_ip_online_change.sh

#/bin/bash
    source /root/.bash_profile
     
    vip=`echo '10.1.5.21/24'`  # Virtual IP
    key=`echo '1'`
     
    command=`echo "$1" | awk -F = '{print $2}'`
    orig_master_host=`echo "$2" | awk -F = '{print $2}'`
    new_master_host=`echo "$7" | awk -F = '{print $2}'`
    orig_master_ssh_user=`echo "${12}" | awk -F = '{print $2}'`
    new_master_ssh_user=`echo "${13}" | awk -F = '{print $2}'`
     
    stop_vip=`echo "ssh root@$orig_master_host /sbin/ifconfig  eth0:$key  down"`
    start_vip=`echo "ssh root@$new_master_host /sbin/ifconfig  eth0:$key  $vip"`
     
    if [ $command = 'stop' ]
       then
       echo -e "\n\n\n***************************************************************\n"
       echo -e "Disabling the VIP - $vip on old master: $orig_master_host\n"
       $stop_vip
       if [ $? -eq 0 ]
          then
          echo "Disabled the VIP successfully"
       else
          echo "Disabled the VIP failed"
       fi
       echo -e "***************************************************************\n\n\n\n"
    fi
     
    if [ $command = 'start' -o $command = 'status' ]
       then
       echo -e "\n\n\n***************************************************************\n"
       echo -e "Enabling the VIP - $vip on new master: $new_master_host \n"
       $start_vip
       if [ $? -eq 0 ]
          then
          echo "Enabled the VIP successfully"
       else
          echo "Enabled the VIP failed"
       fi
       echo -e "***************************************************************\n\n\n\n"
    fi

send_report(shell)脚本

[root@host8 app1]# cat send_report

#/bin/bash
    source /root/.bash_profile
     
    orig_master_host=`echo "$1" | awk -F = '{print $2}'`
    new_master_host=`echo "$2" | awk -F = '{print $2}'`
    new_slave_hosts=`echo "$3" | awk -F = '{print $2}'`
    subject=`echo "$4" | awk -F = '{print $2}'`
    body=`echo "$5" | awk -F = '{print $2}'`
     
    #判断日志结尾是否有successfully，有则表示切换成功，成功与否都发邮件。
    tac /etc/masterha/app1/manager.log | sed -n 2p | grep 'successfully' > /dev/null
    if [ $? -eq 0 ]
        then
        echo -e "MHA $subject 主从切换成功\n master:$orig_master_host --> $new_master_host \n $body \n 当前从库:$new_slave_hosts" | mutt
     -s "MySQL实例宕掉,MHA $subject 切换成功" -- 94097532@qq.com
    else
        echo -e "MHA $subject 主从切换失败\n master:$orig_master_host --> $new_master_host \n $body" | mutt -s "MySQL实例宕掉,MHA $subje
    ct 切换失败" -- 94097532@qq.com
    fi

---------------------
作者：常飞梦
来源：CSDN
原文：https://blog.csdn.net/lichangzai/article/details/50503960
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