keepalived 几种健康监测方式

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一./etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   notification_email {
    test@abc.com
   }
   notification_email_from test@abc.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id  wfc
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
    auth_type PASS
    auth_pass pass_wfc
    }
    virtual_ipaddress {
        10.21.10.32
    }
}
virtual_server 10.21.10.32 6667 {
    delay_loop 6
    lb_algo wlc
    lb_kind DR
ops
    persistence_timeout 50
    protocol TCP
nat_mask 255.255.255.0
include realserver_wfc
}

二./etc/keepalived/realserver_wfc

1.80 port
real_server 10.21.10.30 80 {
weight 1
HTTP_GET {
        url {
        path /keeptest/index.html
        digest 3b9bc8d36a113971683321ad4fa02daf
        }
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        }

}
/usr/bin/genhash  -s 10.21.10.30 -p 80 -u /keeptest/index.html

2.自带检测
/etc/keepalived/realserver_wfc

real_server 10.21.10.30 80 {
weight 4
include only_tcp_80           

}
/etc/keepalived/only_tcp_80  

TCP_CHECK {
connect_timeout 5
connect_port 80
}

3.脚本检测
/etc/keepalived/realserver_wfc

real_server 10.21.10.30 80 {
weight 1
MISC_CHECK {
    misc_path "/etc/keepalived/check_port.sh 10.21.10.30 80"
    misc_timeout 10
}

}
4.脚本如下
/etc/keepalived/check_port.sh

#!/bin/bash
/usr/bin/nc  -z -w1 $1 $2 |  grep  succeeded > /dev/null
exit  $?