MySQL双主双活+Keepalived高可用方案关建配置点

cxin

　　一、在两台服务器上分别安装MySQL实例
　　Mysql01:192.168.0.207
　　Mysql02:192.168.0.208
　　vip1:192.168.0.211
　　vip2:192.168.0.212
　　(略)
　　二、在两台服务器上配置主主复制
　　GRANT REPLICATION SLAVE ON *.* TO 'dba_repl'@'192.168.0.%' IDENTIFIED BY '123456';
　　

　　change master to MASTER_HOST='192.168.0.207',
　　MASTER_USER='dba_repl',
　　MASTER_PASSWORD ='123456',
　　MASTER_LOG_FILE = 'mysql-bin.000003',
　　MASTER_LOG_POS = 120
　　;
　　三、配置keepalived,这个方案的关键点在于keepalived的配制，两个vrrp_instance在两个主上的优先级相反。
　　MySQL01：
　　global_defs {
　　# Keepalived process identifier
　　lvs_id MySQL_HA
　　}
　　# Script used to check if Proxy is running
　　vrrp_script check_proxy {
　　script "killall -0 mysql"
　　interval 2
　　weight 3
　　}
　　# Virtual interface 1
　　# The priority specifies the order in which the assigned interface to take over in a failover
　　vrrp_instance VI_01 {
　　state MASTER
　　interface eth0
　　virtual_router_id 51
　　priority 100
　　# The virtual ip address shared between the two loadbalancers
　　virtual_ipaddress {
　　192.168.0.211 dev eth0
　　}
　　track_script {
　　check_proxy
　　}
　　}
　　# Virtual interface 2
　　# The priority specifies the order in which the assigned interface to take over in a failover
　　vrrp_instance VI_02 {
　　state MASTER
　　interface eth0
　　virtual_router_id 52
　　priority 102
　　# The virtual ip address shared between the two loadbalancers
　　virtual_ipaddress {
　　192.168.0.212 dev eth0
　　}
　　track_script {
　　check_proxy
　　}
　　}
　　主二：
　　global_defs {
　　# Keepalived process identifier
　　lvs_id MySQL_HA
　　}
　　# Script used to check if Proxy is running
　　vrrp_script check_proxy {
　　script "killall -0 mysql"
　　interval 2
　　weight 3
　　}
　　# Virtual interface 1
　　# The priority specifies the order in which the assigned interface to take over in a failover
　　vrrp_instance VI_01 {
　　state MASTER
　　interface eth0
　　virtual_router_id 51
　　priority 102
　　# The virtual ip address shared between the two loadbalancers
　　virtual_ipaddress {
　　10.103.9.211 dev eth0
　　}
　　track_script {
　　check_proxy
　　}
　　}
　　# Virtual interface 2
　　# The priority specifies the order in which the assigned interface to take over in a failover
　　vrrp_instance VI_02 {
　　state MASTER
　　interface eth0
　　virtual_router_id 52
　　priority 100
　　# The virtual ip address shared between the two loadbalancers
　　virtual_ipaddress {
　　192.168.0.212 dev eth0
　　}
　　track_script {
　　check_proxy
　　}
　　}
　　

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