mmm high availability cluster description:
高可用集群介绍：主备模式，当主不能提供服务的时候备用主机接替它提供服务。This process is transparent to the client.
First, the preparatory work
1, five preparations linux server: main (192.168.4.122), standby (192.168.4.123)
从（192.168.4.126），从（192.168.4.127）,管理主机（192.168.4.128）Username call the shots from the four hosts: tongbu, Password: 123456
2, each of the primary and standby master-slave mode is made, both made from the server from the standby
3, IP planning, write-vip = 192.168.4.100, read-vip = 192.168.4.101 / 192.168.4.102
Second, the installation configuration Mysql-mmm
1, the installation: first install dependencies: yum -y install perl- *
cd mysql-mmm-2.2.1/
make install //进入解压后的目录，然后直接安装2, profile Description: cd / etc / mysql-mmm
mmm_agent.conf //数据节点主机文件(四台mysql服务器)
mmm_common.conf //公共配置文件 （五台主机都需要）
mmm_mon.conf //管理主机文件（192.168.4.128）
mmm_tools.conf //管理工具3, modify the data node configuration file: mmm_agent.conf (four mysql server modifications)
include mmm_common.conf //加载文件
this db1 //定义在集群中的名称Name planning: According to the role and named ip address
master122,master123,slave126,slave127
4, configuration change management node (192.168.4.128) mmm_mon.conf
1 include mmm_common.conf
2
3 <monitor>
4 ip 192.168.4.128 //监控本机的IP地址
5 pid_path /var/run/mmm_mond.pid
6 bin_path /usr/lib/mysql-mmm/
7 status_path /var/lib/misc/mmm_mond.status
8 ping_ips 192.168.4.122, 192.168.4.123, 192.168.4.126, 192.168.4.127 //被监控的IP地址
9 </monitor>
10
11 <host default>
12 monitor_user monitor //监控数据库的用户名，用来监测四台数据库服务是否正常
13 monitor_password 123456 //上面的用户名需在122那台主机上添加授权
14 </host>5, modify public profile: mmm_common.conf (five hosts are required)
在一台主机上修改，然后传送给其它四台主机
active_master_role writer
<host default>
cluster_interface eth0
pid_path /var/run/mmm_agentd.pid
bin_path /usr/lib/mysql-mmm/
replication_user tongbu //本机用于主从同步的用户
replication_password 123456
agent_user agent //代理程序去检测的用户名
agent_password 123456</host>
<host master122>
ip 192.168.4.122
mode master //模式
peer master123 //身份对等的主机</host>
<host master123>
ip 192.168.4.123
mode master
peer master122</host>
<host slave126>
ip 192.168.4.126
mode slave</host>
<host slave127>
ip 192.168.4.127
mode slave</host>
<role writer>
hosts master122, master123
ips 192.168.4.100 //两台主备的虚拟IP
mode exclusive //独占模式</role>
<role reader>
hosts slave126, slave127
ips 192.168.4.101, 192.168.4.102
mode balanced //均衡模式</role>
6, add two accounts on the 4.122 authorized host: monitor, agent
grant replication client on . to monitor@'%' identified by '123456';
grant replication client,process,super on . to agent@'%' identified by '123456';
Three, mmm_monitor service on start-up data service node and the management node host
1, installed on the host-initiated five dependencies: The following three tar rpm package or package
解决启动agent服务的依赖包：
Algorithm-Diff-1.1902.tar.gz
perl-Log-Log4perl-1.26-1.el6.rf.noarch.rpm
Proc-Daemon-0.03.tar.gz2, mounting the above three packets
yum -y install gcc gcc-c++
cd mysql-mmm/
tar -zxf Algorithm-Diff-1.1902.tar.gz
cd Algorithm-Diff-1.1902/
perl Makefile.PL
make
make install
cd ..
rpm -ivh perl-Log-Log4perl-1.26-1.el6.rf.noarch.rpm
tar -zxf Proc-Daemon-0.03.tar.gz
cd Proc-Daemon-0.03/
perl Makefile.PL
make
make install3, installation of VIP packages will be retrieved: Net-ARP-1.0.8.tgz (installed on four mysql service)
gunzip Net-ARP-1.0.8.tgz
tar -xf Net-ARP-1.0.8.tar
cd Net-ARP-1.0.8/
perl Makefile.PL
make && make install4, start the agent service: Start on five servers
/etc/init.d/mysql-mmm-agent start //启动服务
netstat -ntulp | grep 9989 //查看端口号，查看服务是否启动
cat /var/log/mysql-mmm/mmm_agentd.log //启动日志mmm_monitor service on 5, start the management node host
/etc/init.d/mysql-mmm-monitor start //启动
netstat -ntulp | grep 9988 //查看是否启动
ls /var/log/mysql-mmm/mmm_mond.log //日志文件6, on the management host, view the monitoring information: mmm_control show
master122(192.168.4.122) master/AWAITING_RECOVERY. Roles:
master123(192.168.4.123) master/AWAITING_RECOVERY. Roles:
slave126(192.168.4.126) slave/AWAITING_RECOVERY. Roles:
slave127(192.168.4.127) slave/AWAITING_RECOVERY. Roles:
7, set up online: mmm_control set_online need to set four
mmm_control set_online master122
mmm_control set_online master123
mmm_control set_online slave126
mmm_control set_online slave127After setting View: mmm_control show
master122(192.168.4.122) master/ONLINE. Roles: writer(192.168.4.100)
master123(192.168.4.123) master/ONLINE. Roles:
slave126(192.168.4.126) slave/ONLINE. Roles: reader(192.168.4.101)
slave127(192.168.4.127) slave/ONLINE. Roles: reader(192.168.4.102)
How to view IP:
ip addr show |. grep 192.168.4 // can get to see the two ip address
Fourth, the test
1, add a user to access the database connection in the data nodes, only need to create an account on the 4.122 Authorization
grant all on . to admin@'%' identified by '123456';
2, client test:
mysql -h192.168.4.100 -uadmin -p123456
After landing up, CRUD database, and then four mysql
On the server to verify correct
3, the manual 4.122 mysql this master server stopped,
To see whether the client has access to, CRUD and so on.
After 4,4.122 up manually, you first need to set up online: mmm_control set_online master122
But the VIP corresponding or 4.123, does not automatically switch over,
Must first 4.123: mmm_control set_offline master123,
Such 4.122 will get VIP