yum -y install perl-Config-Tiny
yum install perl-Log-Dispatch -y
yum install perl-Parallel-ForkManager -y
yum install perl-Time-HiRes -y
# tar xvf mha4mysql-manager-0.54.tar.gz
# cd mha4mysql-manager-0.54
# perl Makefile.PL
# make && make install
Installing /usr/local/share/perl5/MHA/ManagerAdminWrapper.pm
Installing /usr/local/share/perl5/MHA/ManagerUtil.pm
Installing /usr/local/share/perl5/MHA/MasterFailover.pm
Installing /usr/local/share/perl5/MHA/MasterMonitor.pm
Installing /usr/local/share/perl5/MHA/ManagerAdmin.pm
Installing /usr/local/share/perl5/MHA/Config.pm
Installing /usr/local/share/perl5/MHA/DBHelper.pm
Installing /usr/local/share/perl5/MHA/HealthCheck.pm
Installing /usr/local/share/perl5/MHA/FileStatus.pm
Installing /usr/local/share/perl5/MHA/MasterRotate.pm
Installing /usr/local/share/perl5/MHA/Server.pm
Installing /usr/local/share/perl5/MHA/ServerManager.pm
Installing /usr/local/share/perl5/MHA/SSHCheck.pm
Installing /usr/local/share/perl5/MHA/ManagerConst.pm
Installing /usr/local/share/man/man1/masterha_check_ssh.1
Installing /usr/local/share/man/man1/masterha_secondary_check.1
Installing /usr/local/share/man/man1/masterha_conf_host.1
Installing /usr/local/share/man/man1/masterha_check_status.1
Installing /usr/local/share/man/man1/masterha_stop.1
Installing /usr/local/share/man/man1/masterha_manager.1
Installing /usr/local/share/man/man1/masterha_master_monitor.1
Installing /usr/local/share/man/man1/masterha_check_repl.1
Installing /usr/local/share/man/man1/masterha_master_switch.1
Installing /usr/local/bin/masterha_manager
Installing /usr/local/bin/masterha_check_ssh
Installing /usr/local/bin/masterha_check_status
Installing /usr/local/bin/masterha_master_monitor
Installing /usr/local/bin/masterha_secondary_check
Installing /usr/local/bin/masterha_conf_host
Installing /usr/local/bin/masterha_check_repl
Installing /usr/local/bin/masterha_stop
Installing /usr/local/bin/masterha_master_switch
1.5、所有mysql服务器配置ssh登录无密码验证，sshd_config已改不生效，万能的重启
注意：
（1）ssh-copy-id: command not found，解决：yum install openssh-clients -y
（2）对自己本身也要执行ssh-copy-id
（3）关闭slave后重启mysql实例，slave相关的进程正常启动
# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa)
# yum install -y openssh-clients
# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.0.3
# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.0.4
# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.0.5
1.6、搭建主从复制环境
yaolansvr服务器master节点-----------
注意：
（1）datadir和server-id的设置，candidate master和slave只修改server-id
（2）
# vi /usr/mysql/etc/my.cnf
[mysqld]
port = 3306
datadir=/data/mysql/data
#慢查询设置
slow-query-log-file=/var/log/MysqlQuery.log
long_query_time =5
slow_query_log=1
#server-id
server-id=16803
#binlog 设置
log-bin = /data/mysql/data/mysql-bin.log
binlog_cache_size = 8M
binlog_format=mixed
#全局
join_buffer_size = 2M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
read_buffer_size = 2M
max_heap_table_size = 64M
thread_cache_size=12
thread_concurrency = 12
que