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
