RealServer高可用健康监测
1 #!/bin/bash
2 #
3 VIP=192.168.43.200
4 CPORT=80
5 FAIL_BACK=127.0.0.1
6 RS=("192.168.43.202" "192.168.43.203")
7 declare -a RSSTATUS
8 RW=("2" "1")
9 RPORT=80
10 TYPE=g
11 CHKLOOP=3
12 LOG=/var/log/ipvsmonitor.log
13
14 addrs(){
15 ipvsadm -a -t $VIP:$CPORT -r $1:$RPORT -$TYPE -w $2
16 [ $? -eq 0 ] && return 0 || return 1
17 }
18 delrs(){
19 ipvsadm -d -t $VIP:$CPORT -r $1:$RPORT
20 [ $? -eq 0 ] && return 0 || return 1
21 }
22 checkrs(){
23 local I=1
24 while [ $I -le $CHKLOOP ]; do
25 if curl --connect-timeout 1 http://$1 &> /dev/null; then
26 return 0
27 fi
28 let I++
29 done
30 return 1
31 }
32 initstatus(){
33 local I
34 local COUNT=0;
35 for I in ${RS[*]}; do
36 if checkrs $I; then
37 RSSTATUS[$COUNT]=1
38 else
39 RSSTATUS[$COUNT]=0
40 fi
41 let COUNT++
42 done
43 }
44 initstatus
45 while :; do
46 let COUNT=0
47 for I in ${RS[*]}; do
48 if checkrs $I; then
49 if [ ${RSSTATUS[$COUNT]} -eq 0 ]; then
50 addrs $I ${RW[$COUNT]}
51 [ $? -eq 0 ] && RSSTATUS[$COUNT]=1 && echo " $I is back." >> $LOG
52 fi
53 else
54 if [ ${RSSTATUS[$COUNT]} -eq 1 ]; then
55 delrs $I
56 [ $? -eq 0 ] && RSSTATUS[$COUNT]=0 && echo " $I is gone." >> $LOG
57 fi
58 fi
59 let COUNT++
60 done
61 sleep 5
62 done
