### app1.cnf ```shell [server default] manager_log=/etc/mha/log/app1.log manager_workdir=/etc/mha/app1/ master_binlog_dir=/data/mysql3306 master_ip_failover_script=/etc/mha/master_ip_failover master_ip_online_change_script=/etc/mha/master_ip_online_change ping_interval=1 remote_workdir=/tmp secondary_check_script=/bin/masterha_secondary_check -s ip235 -s ip236 --user=root --master_host=ip230 --master_ip=192.168.0.230 --master_port=3306 ssh_user=root user=mha password=mha repl_password=repl repl_user=repl [server1] hostname=192.168.0.230 port=3306 [server2] candidate_master=1 check_repl_delay=0 hostname=192.168.0.235 port=3306 [server3] hostname=192.168.0.236 port=3306 ``` 注释 ```shell manager_log=/etc/mha/log/app1.log #日志位置 manager_workdir=/etc/mha/app1/ # MHA工作目录 master_binlog_dir=/data/mysql3306 #设置Master保存binlog位置的目录 master_ip_failover_script=/etc/mha/master_ip_failover #自动Failover脚本 master_ip_online_change_script=/etc/mha/master_ip_online_change #设置手动切换脚本 ping_interval=1 #设置监控主库的间隔 remote_workdir=/tmp #binlog临时保存目录 secondary_check_script=/bin/masterha_secondary_check -s ip235 -s ip236 --user=root --master_host=ip230 --master_ip=192.168.0.230 --master_port=3306 #检查存活脚本 ssh_user=root #ssh登录名 user=mha #MHA监控所有MySQL节点的用户名 password=mha #MHA监控所有MySQL节点的密码 repl_user=repl #MySQL复制的用户名 repl_password=repl #MySQL复制的密码 [server2] candidate_master=1 #候选主库 check_repl_delay=0 #忽略延迟大小 hostname=192.168.0.235 ``` ### master_ip_failover ```shell #!/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 = '192.168.0.20/24'; my $key = 'wvip'; my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip"; my $ssh_stop_vip = "/sbin/ifconfig eth0:$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"; } ``` ### master_ip_online_change ```shell #!/usr/bin/env perl use strict; use warnings FATAL =>'all'; use Getopt::Long; my $vip = '192.168.0.20/24'; # Virtual IP my $key = "wvip"; my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip"; my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down"; my $exit_code = 0; my $orig_master_ssh_user='root'; my $new_master_ssh_user='root'; my ( $command, $orig_master_is_new_slave, $orig_master_host, $orig_master_ip, $orig_master_port, $orig_master_user, $orig_master_password, $new_master_host, $new_master_ip, $new_master_port, $new_master_user, $new_master_password, ); GetOptions( 'command=s' => \$command, 'orig_master_is_new_slave' => \$orig_master_is_new_slave, 'orig_master_host=s' => \$orig_master_host, 'orig_master_ip=s' => \$orig_master_ip, 'orig_master_port=i' => \$orig_master_port, 'orig_master_user=s' => \$orig_master_user, 'orig_master_password=s' => \$orig_master_password, 'orig_master_ssh_user=s' => \$orig_master_ssh_user, 'new_master_host=s' => \$new_master_host, 'new_master_ip=s' => \$new_master_ip, 'new_master_port=i' => \$new_master_port, 'new_master_user=s' => \$new_master_user, 'new_master_password=s' => \$new_master_password, 'new_master_ssh_user=s' => \$new_master_ssh_user, ); exit &main(); sub main { #print "\n\nIN SCRIPT TEST====$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"; } ```