keepalived HA

keepalived

https://www.keepalived.org/download.html

❯ ./configure --prefix=/opt/keepalived/2.3.1
❯ make install >&  /opt/keepalived/log &

*** WARNING - this build will not support IPVS with IPv6. Please install libnl/libnl-3 dev libraries to support IPv6 with IPVS.

sudo apt-get install build-essential libnl-3-dev libnl-route-3-dev check libssl-dev

vrrp_script chk_mysql_alived {
  script "/usr/local/scripts/chk_mysql_alived.sh"
  interval 2 
  weight -10
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33  # 请根据您的实际网络接口进行调整
    virtual_router_id 50 #与从库的要一致
    priority 101     # 较高的优先级，确保主服务器始终是 MASTER
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.228.112  # 虚拟 IP 地址
    }
    track_script {
        chk_mysql_alived
    }
    vrrp_log {
        file /var/log/keepalived.log  # 日志文件的位置
        syslog yes  # 启用系统日志输出
        debug yes  # 详细调试日志（根据需要调整）
        daemon_notice yes  # 记录守护进程通知
    }
}