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! Configuration File for keepalived
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global_defs {
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router_id MYSQL_MHA
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}
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vrrp_script chk_mysql_port {
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script "{$PLUGIN_PATH}/scripts/chk_mysql.sh"
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interval 2
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weight –5
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fall 2
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rise 1
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}
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vrrp_instance VI_1 {
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state MASTER
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interface {$ETH_XX}
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virtual_router_id 51
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priority 100
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advert_int 1
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authentication {
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auth_type PASS
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auth_pass 1111
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}
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virtual_ipaddress {
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192.168.10.10
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}
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track_script {
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chk_mysql_port
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}
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}
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@@ -0,0 +1,49 @@
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! Configuration File for keepalived
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global_defs {
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# 路由标识,主从保持一致
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router_id MYSQL_MHA
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}
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#检测mysql服务是否在运行。有很多方式,比如进程,用脚本检测等等
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vrrp_script chk_mysql_port {
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# 这里通过脚本监测
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script "{$PLUGIN_PATH}/scripts/chk.sh mysql"
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# 脚本执行间隔,每2s检测一次
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interval 2
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# 脚本结果导致的优先级变更,检测失败(脚本返回非0)则优先级 -5
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weight –5
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# 检测连续2次失败才算确定是真失败。会用weight减少优先级(1-255之间)
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fall 2
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# 检测1次成功就算成功。但不修改优先级
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rise 1
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}
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vrrp_instance VI_1 {
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# 这里所有节点定义为BACKUP/MASTER
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state BACKUP
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# 指定虚拟ip的网卡(可能需要手动查看)
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# route -n | grep ^0.0.0.0 | awk '{print $8}'
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interface {$ETH_XX}
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# 路由器标识,MASTER和BACKUP必须是一致的
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virtual_router_id 51
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# 定义优先级,数字越大,优先级越高,在同一个vrrp_instance下,MASTER的优先级必须大于BACKUP的优先级
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priority 99
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# 通知间隔秒数(心跳频率)
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advert_int 1
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# 不抢占模式,在优先级高的机器上设置即可,优先级低的机器可不设置
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nopreempt
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# 认证信息配置,主从服务器保持一致
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authentication {
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auth_type PASS
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auth_pass 1111
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}
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virtual_ipaddress {
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#虚拟IP(VIP)
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192.168.10.10
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}
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track_script {
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chk_mysql_port
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}
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}
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