Use shell scripts to detect realserver status in LVS and implement automatic removal of attached hosts

#!/bin/sh

# Describe:check the real server status

# history:2015-08-25 22:21:38

# Author:tim

Path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin

Export PATH

vip=192.168.1.121

dip=192.168.1.112

rip= ("192.168.1.122" "192.168.1.123")

Vport=80

status= (0 0)

Type=g

Schema=rr

Weight= (1 3)

Let count=0

Initstats () {

Local I

For I in ' seq 0 1 ';d o

If Ipvsadm-l-n |grep ${rip[$I]} &>/dev/null; then

status[$I]=1

Else

status[$I]=0

Fi

Done

}

#初始化realserver状态

Add () {

Ipvsadm-a-T $VIP: $CPORT-R ${rip[$1]}-$TYPE-W ${weight[$1]}

[$?-eq 0] && return 0 | | Return 1

}

#添加realserver

Del () {

Ipvsadm-d-T $VIP: $CPORT-R ${rip[$1]}

[$?-eq 0] && return 0 | | Return 1

}

#删除realserver

Check () {

If Curl--connect-timeout 1 http://$1 &>/dev/null;then

return 0

Else

Return 1

Fi

}

#检测realserver状态

Initstats

While:;d o

For N in ' seq 0 1 ';d o

If check ${rip[$N]}; then

If [${status[$N]}-eq 0]; then

Add $N &&status[$N]=1 && echo "' Date +%f-%t ', ${rip[$N]} is back" >>/var/log/ipvs

Fi

Else

If [${status[$N]}-eq 1];then

Del $N &&status[$N]=0 &&echo "' Date +%f-%t ', ${rip[$N]} is Gone" >>/var/log/ipvs

Fi

Fi

Done

If [${status[0]}-eq 0-a ${status[1]}-eq 0]; then

Ipvsadm-a-T $VIP: $CPORT-R $DIP-$TYPE

Else

Ipvsadm-d-T $VIP: $CPORT-R $DIP &>/dev/null

Fi

Sleep 5

Done

Note: This script is written when learning Marco Linux video tutorials.

This article is from the "Technical Life" blog, please be sure to keep this source http://hgmz123.blog.51cto.com/9413337/1688588

Use shell scripts to detect realserver status in LVS and implement automatic removal of attached hosts