keepalived misc_check

keepalived.conf中配置

virtual_server 172.17.19.59 9090 {
    delay_loop 6
    lb_algo wlc
    lb_kind DR
    persistence_timeout 120
    protocol TCP
    ha_suspend

    real_server 172.17.14.16 9090 {
        weight 1
        #TCP_CHECK {
        #    connect_port 9090
        #    connect_timeout 3
        #    nb_get_retry 3
        #    delay_before_retry 3
        #}
        MISC_CHECK {
            misc_path "/usr/local/bin/Keepalived_MISC_TCPCHECK.sh 172.17.14.16 9092 ''"
            #misc_path "/usr/local/bin/Keepalived_MISC_TCPCHECK.sh 172.17.19.228 9090 'Health_Check' 'imOK'"
            #misc_path "/usr/local/bin/Keepalived_MISC_HTTPGETCHECK.sh 172.16.17.100 8099 '/healthCheckWS?q=Health_Check' '1593a0d165dbb2ce680fac0bca96c78c'"
            misc_timeout 3
        }
    } # end real_server
} # end virtual_server 172.17.19.59:9090

检查脚本:/usr/local/bin/Keepalived_MISC_TCPCHECK.sh

#!/bin/sh
#Keepalived_MISC_TCPCHECK.sh
#EXITcode:
# 0 success
# 1 connect error
# 2 return error
# 3 script run error

if [ -z "$1" -o -z "$2" ];then
    echo "$0 IP PORT SendText OkMsg"
    exit 3
fi
IP=$1
PORT=$2
SendText=$3
OkMsg=$4
LOG=/var/log/Keepalived_TCPcheck.log
#LOG=/dev/null
export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
RMsg=`echo -n "$SendText"|nc -w 2 $IP $PORT 2>&1`
RCode=$?
EXITcode=0
if [ "$RCode" != "0" ];then
    EXITcode=1
elif [ -n "$OkMsg" -a "$RMsg" != "$OkMsg" ];then
    EXITcode=2
fi
echo "`date +"%Y-%m-%d %H:%M:%S"` $1 $2 $3 $4,RCode=$RCode,RMsg=$RMsg,EXITcode=$EXITcode" >> $LOG
exit $EXITcode

Keepalived_TCPcheck.log日志回滚

cat > /etc/logrotate.d/Keepalived_TCPcheck <<EOF
/var/log/Keepalived_TCPcheck.log {
    copytruncate
    weekly
    rotate 20
    compress
    missingok
    size 20M
}
EOF

2014-11-11: GAEI_AG健康检查接口:http://{ip}:8099/healthCheckWS?q=Health_Check

因接口未知原因使用Keepalived自有的HTTP_GET方法失败，自定义检查脚本:/usr/local/bin/Keepalived_MISC_HTTPGETCHECK.sh

#!/bin/sh
# Keepalived_MISC_HTTPGETCHECK.sh
# get OkMsgMD5:
# curl 'http://172.16.17.100:8099/healthCheckWS?q=Health_Check'|md5sum|awk '{print $1}'
#EXITcode:
# 0 success
# 1 connect error
# 2 return error
# 3 script run error

if [ -z "$1" -o -z "$2" -o -z "$3" ];then
    echo "$0 IP PORT URI [OkMsgMD5]"
    exit 3
fi

IP="$1"
PORT="$2"
URI="$3"
OkMsgMD5="$4"

LOG=/var/log/Keepalived_TCPcheck.log
#LOG=/dev/null
export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
RMsgMD5=`curl -s -S -m 2 "http://$IP:$PORT$URI" 2>>"$LOG"|md5sum|awk '{print $1}'`
RCode=$?
EXITcode=0
if [ "$RCode" != "0" ];then
    EXITcode=$RCode
elif [ -n "$OkMsgMD5" -a "$RMsgMD5" != "$OkMsgMD5" ];then
    EXITcode=2
fi
echo "`date +"%Y-%m-%d %H:%M:%S"` $IP $PORT $URI $OkMsgMD5,RCode=$RCode,RMsgMD5=$RMsgMD5,EXITcode=$EXITcode" >> $LOG
exit $EXITcode