mysql-mmm 安装配置(双主)

原文地址：mysql-mmm 安装配置 作者：chinaunix1116

MMM即Master-Master Replication Managerfor MySQL（mysql主主复制管理器）关于mysql主主复制配置的监控、故障转移和管理的一套可伸缩的脚本套件（在任何时候只有一个节点可以被写入），这个套件也能对居于标准的主从配置的任意数量的从服务器进行读负载均衡，所以你可以用它来在一组居于复制的服务器启动虚拟ip，除此之外，它还有实现数据备份、节点之间重新同步功能的脚本。

MySQL本身没有提供replication failover的解决方案，通过MMM方案能实现服务器的故障转移，从而实现mysql的高可用。MMM不仅能提供浮动IP的功能，更牛的是如果当前的主服务器挂掉后，会将你后端的从自动转向新的主服务器进行同步复制，不用手工更改同步资料。

MMM流程：

1．准备环境，6台机器以上，拓扑图，规划IP，同步hosts，时间

2．安装包

3．配置双master

4．配置slave

5．安装mysql-mmm

6．配置monitor mmm-common.conf 定义d1-d4.IP.虚拟IP

7．Agent端mmm-agent.conf db1-db4

8．Monitor端 monIP地址. Ping真实IP

9．授权用户添加mmm.agent用户（4条）mmm.mom用户（1条）

10．启动

Red Hat Enterprise Linux Server release 6.3

192.168.11.128 desktop128.example.com              monitor

192.168.11.130 desktop130.example.com                master1

192.168.11.131 desktop131.example.com                master2

192.168.11.133 desktop133.example.com                      slave1

192.168.11.134 desktop134.example.com                slave2

虚拟IP：

192.168.11.200 (w)

192.168.11.201 (r)

192.168.11.202 (r)

192.168.11.203 (r)

192.168.11.204 (r)

host

iptables -F

setenforce 0

cat >> /etc/hosts << ENDF

192.168.11.128 desktop128.example.com

192.168.11.133 desktop133.example.com

192.168.11.130 desktop130.example.com

192.168.11.131 desktop131.example.com

192.168.11.134 desktop134.example.com

ENDF

--------------------------------------------------------------

（监管端需要安装）

yum install libart_lgpl perl-Date-Manip
perl-XML-DOM perl-XML-DOM-XPath perl-XML-Parser perl-XML-RegExp rrdtool
perl perl-DBD-MySQL
perl-Params-Validate perl-MailTools perl-Time-HiRes
perl-Class-Singleton -y

（客户端需要安装）

yum install libart_lgpl perl-Date-Manip
perl-XML-DOM perl-XML-DOM-XPath perl-XML-Parser perl-XML-RegExp rrdtool
perl perl-DBD-MySQL
perl-Params-Validate perl-MailTools perl-Time-HiRes
mysql mysql-server mysql-connector-odbc  -y

(监控、客户也可以全部安装)

yum install libart_lgpl perl-Date-Manip
perl-XML-DOM perl-XML-DOM-XPath perl-XML-Parser perl-XML-RegExp rrdtool
perl perl-DBD-MySQL
perl-Params-Validate perl-MailTools perl-Time-HiRes mysql
mysql-server mysql-connector-odbc perl-Class-Singleton -y

光盘中没有的包

rpm -ivh
perl-Algorithm-Diff-1.1902-9.el6.noarch.rpm
perl-Log-Dispatch-2.26-1.el6.rf.noarch.rpm perl-Log-Log4perl-1.26-1.el6.rf.noarch.rpm
perl-Net-ARP-1.0.6-2.1.el6.x86_64.rpm perl-Proc-Daemon-0.06-1.el6.noarch.rpm
perl-Proc-ProcessTable-0.44-4.el6.x86_64.rpm
rrdtool-perl-1.3.8-6.el6.x86_64.rpm perl-IPC-Shareable-0.60-2.el6.rf.noarch.rpm

-----------------------

2台master修改配置文件

master1

在[mysqld]标签下加入

server_id = 1

log_bin = mysql

log_slave_updates = 1

auto_increment_increment = 2

auto_increment_offset = 1         //区分2台master

master2

在[mysqld]标签下加入

server_id = 2

log_bin = mysql

log_slave_updates = 1

auto_increment_increment = 2

auto_increment_offset = 2

------------------------------------------

同步两台机器的数据库

[root@desktop130 ~]# mysqldump
--all-databases > /tmp/mysql-all.sql

[root@desktop130 ~]# scp /tmp/mysql-all.sql
root@desktop131.uplooking.com:/tmp

[root@desktop131 ~]# mysql <
/tmp/mysql-all.sql

-----------------------------------------------

双向master         //都在master1授权，change
master分别做

[root@desktop130 ~]# cat << ENDF |
mysql

> GRANT REPLICATION SLAVE ON *.* TO
'slave'@'192.168.11.130' IDENTIFIED BY

'uplooking';

> GRANT REPLICATION SLAVE ON *.* TO
'slave'@'192.168.11.131' IDENTIFIED BY

'uplooking';

[root@desktop131 mysql]# mysql

mysql> change master to
master_host="192.168.11.130",master_user="slave",master_password="uplooking",master_log_file="mysql.000001",master_log_pos=106;

mysql> slave start;

mysql> show slave status\G

[root@desktop130 mysql]# mysql

mysql> change master to
master_host="192.168.11.131",master_user="slave",master_password="uplooking",master_log_file="mysql.000002",master_log_pos=506;

mysql> slave start;

mysql> show slave status\G

---------------------------------------------------

2台slave

[root@desktop133 ~]# vi /etc/my.cnf

在[mysqld]标签下加入

server-id = 3

[root@desktop133 ~]# service mysqld start

[root@desktop134 ~]# vi /etc/my.cnf

在[mysqld]标签下加入

server-id = 4

[root@desktop134 ~]# service mysqld start

------------------------------

配置两台mysql的slave模式

master1中授权

[root@destop130 ~]# cat << ENDF |
mysql

> GRANT REPLICATION SLAVE ON *.* TO
'slave'@'192.168.11.133' IDENTIFIED BY

'uplooking';

> GRANT REPLICATION SLAVE ON *.* TO
'slave'@'192.168.11.134' IDENTIFIED BY

'uplooking';

> FLUSH PRIVILEGES;

------------------------------------------------

133,134同步主分别在slave1 slave2 change master

mysql> change master to
master_host="192.168.11.130",master_user="slave",master_password="uplooking",master_log_file="mysql.000001",master_log_pos=106;

slave start

show slave status\G

----------------------------------

安装配置mysql-mmm

在每台机器上都安装mysql-mmm

tar xf mysql-mmm-2.2.1.tar.gz

cd mysql-mmm-2.2.1

make install

---------------------------------------------

修改5台机器mmm_common.conf配置文件

[root@desktop131 mysql-mmm-2.2.1]# cat
/etc/mysql-mmm/mmm_common.conf

active_master_role       writer

cluster_interface          eth0

pid_path                      /var/run/mmm_agentd.pid

bin_path                      /usr/lib/mysql-mmm/

replication_user        slave

replication_password    uplooking

agent_user                          mmm_agent

agent_password                  uplooking

ip                                       192.168.11.130

mode                                  master

peer                             db2

ip                                       192.168.11.131

mode                                  master

peer                             db1

ip                                       192.168.11.133

mode                                  slave

ip                                       192.168.11.134

mode                                  slave

hosts                                  db1, db2                      // 写

ips                                      193.168.11.200            // 虚拟IP

mode                                  exclusive

hosts                                  db1, db2,
db3,db4                             // 读

ips                                      192.168.11.201,192.168.11.202,192.168.11.203,192.168.11.204
   //虚拟ip

mode                                  balanced

将此文件同步到所有机器上

[root@desktop130 ~]# for i in 128 131 133
134 ; do scp /etc/mysql-mmm/mmm_common.conf

192.168.11.$i:/etc/mysql-mmm/ ; done

-------------------------------------

修改agent端配置文件

[root@desktop130 ~]# vi
/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf

this db1

[root@desktop131 ~]# vi
/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf

this db2

[root@desktop133 ~]# vi
/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf

this db3

[root@desktop134 ~]# vi
/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf

this db4

----------------------------------------------

修改monitor端配置文件

[root@desktop128 ~]# vi
/etc/mysql-mmm/mmm_mon.conf

include mmm_common.conf

ip                                       192.168.11.128

pid_path                      /var/run/mmm_mond.pid

bin_path                      /usr/lib/mysql-mmm/

status_path                         /var/lib/misc/mmm_mond.status

ping_ips                      192.168.0.1,
192.168.0.2, 192.168.0.3       // 真实IP

monitor_user               mmm_monitor

monitor_password        uplooking

debug 0

---------------------------------------------------------------

master1中授权mmm_agent

[root@desktop130 ~]# mysql

mysql> grant super,replication
client,process on *.* to mmm_agent@192.168.11.130 identified by 'uplooking';

mysql> grant super,replication
client,process on *.* to mmm_agent@192.168.11.131 identified by 'uplooking';

mysql> grant super,replication
client,process on *.* to mmm_agent@192.168.11.133 identified by 'uplooking';

mysql> grant super,replication
client,process on *.* to mmm_agent@192.168.11.134 identified by 'uplooking';

master1中授权mmm_monitor

[root@desktop130 ~]# mysql

mysql> grant replication client on *.*
to mmm_monitor@192.168.11.128 identified by 'uplooking';

mysql> flush privileges;

起monitor服务

[root@desktop128 mysql-mmm]#
/etc/init.d/mysql-mmm-monitor start

4台agent起服务

[root@desktop130 mysql-mmm]# service
mysql-mmm-agent start

[root@desktop128 ~]# netstat -ntlp         //出现以下信息表明监听成功

tcp       
0      0 127.0.0.1:9988              0.0.0.0:*                   LISTEN      20608/mmm_mond

[root@desktop130 ~]# netstat -ntlp

tcp       
0      0 192.168.11.130:9989         0.0.0.0:*                   LISTEN      14782/mmm_agentd

[root@desktop128 mysql-mmm]# mmm_control
show                //找到4台agent，但没有Online

db1(192.168.11.130) master/AWAITING_RECOVERY. Roles:

db2(192.168.11.131) master/AWAITING_RECOVERY. Roles:

db3(192.168.11.133) slave/AWAITING_RECOVERY. Roles:

db4(192.168.11.134) slave/AWAITING_RECOVERY. Roles:

[root@desktop128 mysql-mmm]#

mmm_control set_online db1

mmm_control set_online db2

mmm_control set_online db3

mmm_control set_online db4

如遇以下报错，重启下mysqld

[root@desktop128
Desktop]# mmm_control set_online db3

ERROR: Host 'db3' is
'HARD_OFFLINE' at the moment. It can't be switched to ONLINE.

[root@desktop128 mysql-mmm]# mmm_control
show

db1(192.168.11.130) master/ONLINE. Roles: reader(192.168.11.202)

db2(192.168.11.131) master/ONLINE. Roles: reader(192.168.11.201),
writer(193.168.11.200)

db3(192.168.11.133) slave/ONLINE. Roles: reader(192.168.11.203)

db4(192.168.11.134) slave/ONLINE. Roles: reader(192.168.11.204)

-----------------------------------------------------------------------------

故障模拟

slave1,slave2同步的是master1，把master1挂掉

[root@desktop130 ~]#
iptables -A INPUT -s 192.168.11.128 -j DROP

//添加一条规则，INPUT链 –s 拒绝monitor端网络数据包 –j 直接丢掉

[root@desktop128 Desktop]# mmm_control show

# Warning: agent on host db1 is not
reachable

db1(192.168.11.130) master/HARD_OFFLINE. Roles:

db2(192.168.11.131) master/ONLINE. Roles: reader(192.168.11.204),
writer(193.168.11.200)

db3(192.168.11.133) slave/ONLINE. Roles: reader(192.168.11.201),
reader(192.168.11.203)

db4(192.168.11.134) slave/ONLINE. Roles: reader(192.168.11.202)

然后再恢复master1，看看结果

[root@desktop130 Desktop]#iptables –D INPUT
1

[root@desktop128 Desktop]# mmm_control
set_online db1

[root@desktop128 Desktop]# mmm_control show

db1(192.168.11.130) master/ONLINE. Roles: reader(192.168.11.201)

db2(192.168.11.131) master/ONLINE. Roles: reader(192.168.11.204),
writer(193.168.11.200)

db3(192.168.11.133) slave/ONLINE. Roles: reader(192.168.11.203)

db4(192.168.11.134) slave/ONLINE. Roles: reader(192.168.11.202)