mariadb集群负载

mariadb集群负载

1.安装mariadb on ubuntu

http://blog.secaserver.com/2013/07/install-mariadb-galera-cluster-ubuntu/

3 在服务器上用mysql -h 192.168.0.1 -u root -p mysql命令登录mysql数据库

然后用grant命令下放权限。

GRANT ALL PRIVILEGES ON *.* TO root@localhost IDENTIFIED BY 'root-password' WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON *.* TO [email protected] IDENTIFIED BY 'root-password' WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON *.* TO root@'%' IDENTIFIED BY 'root-password' WITH GRANT OPTION;

例如：
GRANT   ALL   PRIVILEGES   ON   *.*   TO   root@'%'   identified   by   '123456'  

注意：自己根据情况修改以上命令中的 “用户”“ip地址”“密码”。 

2 安装和配置haproxy

option mysql-check [ user <username> ]   
 USE mysql;       INSERT INTO user (Host,User) values ('<ip_of_haproxy>','<username>');       FLUSH PRIVILEGESheck 

only consists in parsing the Mysql Handshake Initialisation packet or   Error packet, we don't send anything in this mode. It was reported that it   can generate lockout if check is too frequent and/or if there is not enough   traffic. In fact, you need in this case to check MySQL "max_connect_errors"   value as if a connection is established successfully within fewer than MySQL   "max_connect_errors" attempts after a previous connection was interrupted,   the error count for the host is cleared to zero. If HAProxy's server get   blocked, the "FLUSH HOSTS" statement is the only way to unblock it.

配置：

    
    
    
    

     
     
     
     # this config needs haproxy-1.1.28 or haproxy-1.2.1  global         
     
     
     
     
log 127.0.0.1   
     
     
     
     
local0 info    
     
     
     
     
#日志相关         
     
     
     
     
log 127.0.0.1   
     
     
     
     
local1 notice         
     
     
     
     
maxconn 4096         
     
     
     
     
daemon         
     
     
     
     
#debug         
     
     
     
     
#quiet  defaults        
     
     
     
     
 log     global         mode    http         #option httplog         option  dontlognull         retries 3         option redispatch         maxconn         2000         contimeout      5000         clitimeout      50000         srvtimeout      50000  listen  mysql         bind 0.0.0.0:3333   #代理端口         mode tcp              #模式 TCP         option mysql-check user haproxy #mysql健康检查  root为mysql登录用户名         balance roundrobin            #调度算法         server mysql1 172.20.21.1:3306 weight 1 check  inter 1s rise 2 fall 2         server mysql2 172.20.21.2:3306 weight 1 check  inter 1s rise 2 fall 2         server mysql3 172.20.21.3:3306 weight 1 check  inter 1s rise 2 fall 2  listen stats :1936     mode http     stats enable     stats hide-version     stats realm Haproxy\ Statistics     stats uri /     stats auth admin:admin