Mysql GTID Mha设置方法的示例代码分享

SQL是Structured Query Language(结构化查询语言)的缩写。SQL是专为数据库而建立的操作命令集，是一种功能齐全的数据库语言。在使用它时，只需要发出“做什么”的命令，“怎么做”是不用使用者考虑的。SQL功能强大、简单易学、使用方便，已经成为了数据库操作的基础，并且现在几乎所有的数据库均支持SQL。

下面小编就为大家带来一篇Mysql GTID Mha配置方法。小编觉的挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧

Gtid + Mha +Binlog server配置：

1：测试环境

OS：CentOS 6.5
Mysql：5.6.28
Mha：0.56

192.168.1.21 mysql1 M1
192.168.1.22 mysql2 S1
192.168.1.23 mysql3 S2 Mha manage、Binlog server

2：配置/etc/my.cnf相关参数,在3各节点中分别配置

binlog-format=ROW 
log-slave-updates=true 
gtid-mode=on 
enforce-gtid-consistency=true 
master-info-repository=TABLE 
relay-log-info-repository=TABLE 
sync-master-info=1 
slave-parallel-workers=2 
binlog-checksum=CRC32 
master-verify-checksum=1 
slave-sql-verify-checksum=1 
binlog-rows-query-log_events=1

设置root密码，创建复制用户：

mysql> use mysql;
mysql> GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "oracle123";
mysql> update user set Password = password('oracle123') where User='root';
mysql> flush privileges;

mysql> GRANT replication slave ON *.* TO 'repl'@'%' identified by 'oracle';    

mysql> flush privileges;

3：在mysql2、mysql3配置Gtid复制

CHANGE MASTER TO 
MASTER_HOST = '192.168.1.21',
MASTER_PORT = 3306,
MASTER_USER = 'repl',
MASTER_PASSWORD = 'oracle',
MASTER_AUTO_POSITION = 1;

start slave;

mysql> show slave status\G
*************************** 1. row ***************************
        Slave_IO_State: Waiting for master to send event
         Master_Host: 192.168.1.21
         Master_User: repl
         Master_Port: 3306
        Connect_Retry: 60
       Master_Log_File: mysql-bin.000003
     Read_Master_Log_Pos: 524
        Relay_Log_File: mysql-relay-bin.000002
        Relay_Log_Pos: 734
    Relay_Master_Log_File: mysql-bin.000003
       Slave_IO_Running: Yes
      Slave_SQL_Running: Yes
       Replicate_Do_DB: 
      ......
 Master_SSL_Crlpath: 
      Retrieved_Gtid_Set: 9ee7c7af-cbf3-11e5-bf75-000c2923e459:1-2
      Executed_Gtid_Set: 9ee7c7af-cbf3-11e5-bf75-000c2923e459:1-2
        Auto_Position: 1
1 row in set (0.00 sec)

4：安装Mha

rpm -Uvh epel-release-6-8.noarch.rpm

配置SSH等效：

在所有节点都执行

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql1
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql2
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql3

测试ssh登录，在3各节点分别测试：

ssh myqsl1
ssh myqsl2
ssh myqsl3

binlog server配置：在mysql3

mkdir -p /mysql/backup/binlog
/usr/local/mysql/bin/mysqlbinlog -R --raw --host=192.168.1.20 --user='root' --password='oracle123' --stop-never mysql-
bin.000003 &

最后那个binlog文件时给定从那个binlog文件开始。另外需要注意，当mysql1上的mysql进程退出后，binlog server也会退出。

需要安装一些包做支持，使用yum网络源；如安装遇到问题可以尝试yum update更新yum源或yum clean all清除缓存

在每个节点安装 mha4mysql-node

yum -y install perl-DBD-MySQL ncftp
rpm -Uvh mha4mysql-node-0.56-0.el6.noarch.rpm

在mysql3上安装mha-manager

yum install perl
yum install cpan
yum install perl-Config-Tiny
yum install perl-Time-HiRes 
yum install perl-Log-Dispatch
yum install perl-Parallel-ForkManager

如果安装perl-Log-Dispatch，perl-Parallel-ForkManager安装包报错：

需要先安装epel

rpm -Uvh mha4mysql-manager-0.56-0.el6.noarch.rpm

5：配置Mha,在mysql3

mkdir -p /etc/masterha/app1
vi /etc/masterha/app1.cnf
[server default]
user=root  
password=oracle123
manager_workdir=/etc/masterha/app1
manager_log=/etc/masterha/app1/manager.log
remote_workdir=/etc/masterha/app1
ssh_user=root
repl_user=repluser
repl_password=oracle
ping_interval=3
master_ip_failover_script=/etc/masterha/app1/master_ip_failover

[server1]
hostname=192.168.1.21
#ssh_port=9999
master_binlog_dir=/mysql/logs
check_repl_delay=0       #防止master故障时候，切换时slave有延迟，可在那里切不过来
candidate_master=1

[server2]
hostname=192.168.1.22
#ssh_port=9999
master_binlog_dir=/mysql/logs
candidate_master=1

[server3]
hostname=192.168.1.23
#ssh_port=9999
master_binlog_dir=/mysql/logs
no_master=1
ignore_fail=1           #如果这个节点挂了，mha将不可用，加上这个参数slave挂了一样可以用

[binlog1]                   #binlog server需要mysqlbinlog命令
hostname=192.168.1.23
master_binlog_dir=/mysql/backup/binlog    #读取binlog存放位置
ignore_fail=1
no_master=1

vi /etc/masterha/app1/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 = '192.168.1.20';#Virtual IP
my $gateway = '192.168.1.1';#Gateway IP
my $interface = 'eth0';
my $key = "1";
my $ssh_start_vip = "/sbin/ifconfig $interface:$key $vip;/sbin/arping -I $interface -c 3 -s $vip $gateway >/dev/null 2>&1";
my $ssh_stop_vip = "/sbin/ifconfig $interface:$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"   关键词：Mysql GTID Mha设置办法的示例代码分享