1、关闭主从库relay_log_purge
mysql> set global relay_log_purge=0;
2、切换脚本
[root@localhost ~]# cat /mha-manager/bin/master_ip_failover
#!/usr/bin/env perl
# Copyright (C) 2011 DeNA Co.,Ltd.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
## Note: This is a sample script and is not complete. Modify the script based on your environment.
use strict;
use warnings FATAL => 'all';
use Getopt::Long;
use MHA::DBHelper;
my (
$command, $ssh_user, $orig_master_host,
$orig_master_ip, $orig_master_port, $new_master_host,
$new_master_ip, $new_master_port, $new_master_user,
$new_master_password
);
my $vip = '172.16.107.30/24';
my $key = '88';
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,
'new_master_user=s' => \$new_master_user,
'new_master_password=s' => \$new_master_password,
);
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";
}
按需修改：my $vip = '172.16.107.30/24'
陪完脚本后配置VIP
ifconfig eth0:88 172.16.107.30/24 ifconfig eth0:88 down
3、修改默认设置[root@localhost ~]# cat /etc/masterha_default.cnf
[server default] user=root password=123456 ssh_user=root repl_user=slave repl_password= 123456 ping_interval=1
4、数据库集群切换配置[root@localhost ~]# cat /mha-manager/etc/app1.cnf
[server default] manager_log=/mha-manager/log/manager.log manager_workdir=/mha-manager/app1 master_ip_failover_script=/mha-manager/bin/master_ip_failover [serverr1] candidate_master=1 check_repl_delay=0 hostname=172.16.107.18 master_binlog_dir=/var/lib/mysql/ port=3306 [server2] candidate_master=1 check_repl_delay=0 hostname=172.16.107.16 master_binlog_dir=/var/lib/mysql/ port=3306 [server3] hostname=172.16.107.20 master_binlog_dir=/var/lib/mysql/ port=3306
5、检查ssh免密登录是否正常,检查主从复制是否正常
1)masterha_check_ssh --conf=/mha-manager/etc/app1.cnf
2)masterha_check_repl --conf=/mha-manager/etc/app1.cnf
6、后台运行masterha_manager，然后检查masterha_manager是否正常
1)nohup masterha_manager --conf=/mha-manager/etc/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /mha-manager/log/manager.log 2>&1 &
2)masterha_check_status --conf=/mha-manager/etc/app1.cnf
7、手动切换(需要关闭masterha_manager)
masterha_master_switch --conf=/mha-manager/etc/app1.cnf --master_state=alive --new_master_host=172.16.107.18 --new_master_port=3306 --orig_master_is_new_slave --running_updates_limit=100
标签：--,配置,mha,manager,exit,master,ssh,new From： https://www.cnblogs.com/xue0123/p/17916730.html