Keepalived + Haproxy VIP: 123.125.22.90 Master: 123.125.22.97 Backup: 123.125.22.98 Server1: 123.125.22.99 Server2: 123.125.22.100

chk_haproxy.sh

# author: weizhifeng

status=$(ps aux|grep haproxy | grep -v grep | grep -v bash | wc -l)
if [ "${status}" = "0" ]; then
    /etc/init.d/haproxy start

    status2=$(ps aux|grep haproxy | grep -v grep | grep -v bash |wc -l)

    if [ "${status2}" = "0"  ]; then
            /etc/init.d/keepalived stop
    fi
fi
~

haproxy.conf

# this config needs haproxy-1.1.28 or haproxy-1.2.1

global
        log 127.0.0.1   local3 debug
        #log 127.0.0.1  local1 notice
        #log loghost    local0 info
        maxconn 65535
        #chroot /usr/share/haproxy
        user haproxy
        group haproxy
        daemon
        nbproc 1
        pidfile /var/run/haproxy.pid
        #debug
        #quiet

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        retries 3
        redispatch
        stats   enable
        stats   uri     /haproxy-status
        stats   refresh 5s
        maxconn 2000
        contimeout      5000
        clitimeout      50000
        srvtimeout      50000

listen  swaf-loadbalance 0.0.0.0:80
        cookie  SERVERID rewrite
        balance roundrobin
        server  swaf_99 123.125.22.99:80 cookie app1inst1 check inter 2000 rise 2 fall 5
        server  sawf_100 123.125.22.100:80 cookie app1inst2 check inter 2000 rise 2 fall 5

keepalived.haproxy.backup.conf

! Configuration File for keepalived
 
global_defs {
   notification_email {
    xxx@sina.com.cn
   }
   notification_email_from sec@sina.com.cn
   smtp_server mail.sina.com.cn
   smtp_connect_timeout 30
   router_id swaf_haproxy_2
}
 
 
vrrp_script chk_haproxy {
    script "/usr/local/keepalived/chk_haproxy.sh"
    interval 2
    weight 2
}
 
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 21
    priority 50
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass sinasec
    }
 
    track_script {
        chk_haproxy
    }
 
    virtual_ipaddress {
        123.125.22.90
    }
}

keepalived.haproxy.master.conf

! Configuration File for keepalived

global_defs {
   notification_email {
    xxx@sina.com.cn
   }
   notification_email_from sec@sina.com.cn
   smtp_server mail.sina.com.cn
   smtp_connect_timeout 30
   router_id swaf_haproxy_1
}


vrrp_script chk_haproxy {
    script "/usr/local/keepalived/chk_haproxy.sh"
    interval 2
    weight 2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 21
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass sinasec
    }

    track_script {
        chk_haproxy
    }

    virtual_ipaddress {
        123.125.22.90
    }
}

VIP: 123.125.22.90
Master: 123.125.22.97
Backup: 123.125.22.98
Server1: 123.125.22.99
Server2: 123.125.22.100