Mycat HA(高可用) 与 LB(负载均衡)16

franket

发布于 2021-12-02 09:51:47

1470

发布于 2021-12-02 09:51:47

文章被收录于专栏：技术杂记

它进行的判断就是，如果系统中有命令包含 haproxy.cfg 的进程(假定这种情况就代表haproxy正在运行)，就反馈 0 ，否则反馈 1

[root@h101 script]# ps faux | grep -v grep | grep haproxy 
haproxy  23083  0.0  0.0  14260  1408 ?        Ss   22:43   0:00 /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
[root@h101 script]# /usr/local/keepalived/script/chk_haproxy.bash 
[root@h101 script]# echo $?
0
[root@h101 script]# kill 23083
[root@h101 script]# ps faux | grep -v grep | grep haproxy 
[root@h101 script]# /usr/local/keepalived/script/chk_haproxy.bash 
[root@h101 script]# echo $?
1
[root@h101 script]#

配置keepalived

[root@h101 script]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   router_id LVS_101
}

vrrp_script checkhaproxy {
        script "/usr/local/keepalived/script/chk_haproxy.bash"
        weight -20
        interval 3
}

vrrp_instance VI_222 {
    state BACKUP 
    interface eth2
    virtual_router_id 222
    priority 108
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
            checkhaproxy
    }
    virtual_ipaddress {
        192.168.100.222/24
    }
}
[root@h101 script]# 
----------
[root@h102 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   router_id LVS_102
}

vrrp_script checkhaproxy {
	script "/usr/local/keepalived/script/chk_haproxy.bash"
	weight -20 
	interval 3
}


vrrp_instance VI_222 {
    state BACKUP 
    interface eth2
    virtual_router_id 222
    priority 115
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
            checkhaproxy
    }

    virtual_ipaddress {
        192.168.100.222/24
    }
}
[root@h102 ~]#

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haproxy