解决“service realserver does not support chkconfig”的问题？

最近由于要做负载均衡：LVS  + keepalived  ，想在真实服务器网上上添加LO:0接口，并设置虚拟IP在此接口上：

[root@itcast01 ~]# cd /etc/init.d/

[root@itcast01 ~]#touch realserver

[root@itcast01 ~]#vim realserver

SNS_VIP=192.168.88.137
. /etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0

[root@itcast01 ~]#chmod 750 realserver     #给此脚本赋予权限

[root@itcast01 ~]#chkconfig realserver on         #设置开机自启动此脚本

此处出现了“service realserver does not support chkconfig”的问题。

很是奇怪，后经过查找资料，发现如果想添加脚本用service启动，必须要脚本里面包含这2行：

# chkconfig: 2345 10 90
# description: realserver ....

其他的都不所谓，只是个注意而已！！！

修改后的启动脚本：

# chkconfig: 2345 10 90 
# description: realserver ....
SNS_VIP=192.168.88.137
. /etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0

　　

[root@itcast01 ~]# cd /etc/init.d/

[root@itcast01 ~]#touch realserver

[root@itcast01 ~]#vim realserver

[root@itcast01 ~]#ll

[root@itcast01 ~]#chmod 750 realserver     #给此脚本赋予权限

[root@itcast01 ~]#chkconfig realserver on         #设置开机自启动此脚本

[root@itcast01 ~]#service realserver start          #开启此脚本

RealServer Start OK    #表示启动成功!

[root@itcast01 ~]#ifconfig    #查看一下是否真的成功添加了lo:0接口

脚本参数说明：

#chkconfig: 2345 10 90
#description :realserver ....
SNS_VIP=192.168.88.137            #定义VIP变量
. /etc/rc.d/init.d/functions	#导脚本库
case "$1" in					#case语句 $1传递给该shell脚本的第一个参数
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP #设置Lo：0 VIP  netmask  及广播
/sbin/route add -host $SNS_VIP dev lo:0							  ##route del 增加本地路由
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1						# -p <file>   (default /etc/sysctl.conf) 将标准信息输入设备空文件
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1     			#route del 删除本地路由
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"  #$0 是脚本本身的名字
exit 1							#表示进程正常退出
esac							#case结束
exit 0							#表示进程非正常退出