mysql高可用方案之MHA

环境规划:节点说明主机名IP地址管理节点tong3192.168.1.249主节点tong2192.168.1.248主节点 tong1&nb..

环境规划:

节点说明    主机名   IP地址

管理节点   tong3   192.168.1.249

主节点     tong2   192.168.1.248

主节点　   tong1   192.168.1.247

1.网络和主机名配置

设置每个主机的ＩＰ地址和/etc/hosts文件互相解析

[root@tong1 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
192.168.1.249 tong3
[root@tong1 ~]# ping tong1 -c1         --网络必须ping通
PING tong1 (192.168.1.247) 56(84) bytes of data.
64 bytes from localhost (192.168.1.247): icmp_seq=1 ttl=64 time=0.021 ms

--- tong1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.021/0.021/0.021/0.000 ms
[root@tong1 ~]# ping tong2 -c1
PING tong2 (192.168.1.248) 56(84) bytes of data.
64 bytes from tong2 (192.168.1.248): icmp_seq=1 ttl=64 time=0.109 ms

--- tong2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.109/0.109/0.109/0.000 ms
[root@tong1 ~]# ping tong3 -c1
PING tong3 (192.168.1.249) 56(84) bytes of data.
64 bytes from tong3 (192.168.1.249): icmp_seq=1 ttl=64 time=0.124 ms

--- tong3 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.124/0.124/0.124/0.000 ms
[root@tong1 ~]# 

2.安装mha管理软件mha manager

tong3管理节点:

[root@tong3 ~]# yum install  perl-DBD-MySQL cpan　 --安装perl工具

[root@tong3 ~]# tar xvf mha4mysql-manager-0.53.tar.gz  -C /usr/local/

[root@tong3 ~]# cd /usr/local/mha4mysql-manager-0.53/

[root@tong3 mha4mysql-manager-0.53]# perl Makefile.PL 

[root@tong3 mha4mysql-manager-0.53]# echo $?
0
[root@tong3 mha4mysql-manager-0.53]# make && make install

[root@tong3 mha4mysql-manager-0.53]# echo $?
0
[root@tong3 mha4mysql-manager-0.53]#

3.在各数据节点安装mha node

[root@tong2 ~]# tar xvf mha4mysql-node-0.53.tar.gz
[root@tong2 ~]# cd mha4mysql-node-0.53
[root@tong2 mha4mysql-node-0.53]# yum install perl-DBD-mysql cpan -y

[root@tong2 mha4mysql-node-0.53]# perl Makefile.PL
[root@tong2 mha4mysql-node-0.53]# make && make install

[root@tong2 mha4mysql-node-0.53]#  echo $?
0
[root@tong2 mha4mysql-node-0.53]# 

4.各节点ssh互相信任

[root@tong3 ~]# ssh-keygen  -t dsa

[root@tong3 ~]# cd .ssh

[root@tong3 .ssh]# cat id_dsa.pub  > authorized_keys

[root@tong3 .ssh]# scp 192.168.1.247:/root/.ssh/id_dsa.pub 247

[root@tong3 .ssh]# scp 192.168.1.248:/root/.ssh/id_dsa.pub 248

[root@tong3 .ssh]# cat 248  247 >> authorized_keys
[root@tong3 .ssh]# scp authorized_keys 192.168.1.248:/root/.ssh/
authorized_keys                                                                                                                                    100% 1800     1.8KB/s   00:00   
[root@tong3 .ssh]# scp authorized_keys 192.168.1.247:/root/.ssh/
root@192.168.1.247's password:
authorized_keys                                                                                                                                    100% 1800     1.8KB/s   00:00    
[root@tong3 .ssh]# ssh tong1 date
Tue Apr 28 12:57:02 CST 2015
[root@tong3 .ssh]# ssh tong2 date
Tue Apr 28 12:59:57 CST 2015
[root@tong3 .ssh]# ssh tong3 date
Tue Apr 28 12:57:25 CST 2015
[root@tong3 .ssh]# 

5.在管理节点编辑配置文件