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 perluse 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 IPmy $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 mastersub start_vip() {`ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;}# A simple system call that disable the VIP on the old_mastersub 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=port –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 perluse strict;use warnings FATAL =>'all';use Getopt::Long;my $vip = '10.1.5.21/24';  # Virtual IPmy $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 mastersub start_vip() {`ssh $new_master_ssh_user\@$new_master_host \" $ssh_start_vip \"`;}# A simple system call that disable the VIP on the old_mastersub 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=port –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/bashsource /root/.bash_profilevip=`echo '10.1.5.21/24'`  # Virtual IPkey=`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"fiif [ $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/bashsource /root/.bash_profileorig_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/nullif [ $? -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" -- [e-mail]    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 $subject 切换失败" -- [e-mail]