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LVS + keepalived的实现
! Configuration File for keepalived global_defs { notification_email { linuxedu@foxmail.com mageedu@126.com } notification_email_from kanotify@magedu.com smtp_connect_timeout 3 smtp_server 127.0.0.1 router_id LVS_DEVEL } vrrp_script chk_schedown { script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0" interval 2 weight -2 } vrrp_instance VI_1 { interface eth0 state MASTER priority 101 virtual_router_id 51 garp_master_delay 1 authentication { auth_type PASS auth_pass password } track_interface { eth0 } virtual_ipaddress { 172.16.100.1/16 dev eth0 label eth0:0 } track_script { chk_schedown } } virtual_server 172.16.100.1 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP # sorry_server 192.168.200.200 1358 real_server 172.16.100.11 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } real_server 172.16.100.12 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } } 如果要使用TCP_CHECK检测各realserver的健康状态,那么,上面关于realserver部分的定义也可以替换为如下内容: virtual_server 172.16.100.1 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 300 protocol TCP sorry_server 127.0.0.1 80 real_server 172.16.100.11 80 { weight 1 TCP_CHECK { tcp_port 80 connect_timeout 3 } } real_server 172.16.100.12 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 } } } 说明:其中的sorry_server是用于定义所有realserver均出现故障时所用的服务器。
LVS + keepalived的实现
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