21：开发脚本管理服务端LVS案例

[root@lb03 scripts]# cat lv_manager.sh
#!/bin/bash#定义只能是root用户执行
if [ $UID -ne  ];then
    echo "permission deny  必须root用户执行"
    exitfi
#文件存在就加载文件
[ -f /etc/init.d/functions ] && . /etc/init.d/functions#定义绑定的虚拟ipvip_netmask=10.0.0.13/vip=10.0.0.3service_addr=10.0.0.13:
wbs=(
10.0.0.17:
10.0.0.18:
)count_pkg=$(rpm -qa|egrep ipvsadm|wc -l)function start () {
    #检查虚拟IP个数,IP检测和ipvsadm -ln两种方法检查
    count_vip_check=$(ip a|grep 10.0.0.1[]|wc -l)
    count_vip_check2=$(ipvsadm -ln|grep "10.0.0.1[3]:80"|wc -l)
    if [ ${count_vip_check} -eq  -o ${count_vip_check2} -eq   ]
    then
        echo "${count_vip_check} 虚拟IP已经存在"
    else
        ip addr add 10.0.0.13/ dev eth0
        ipvsadm -C
        ipvsadm --set
        ipvsadm -A -t 10.0.0.13: -s wrr -p
    fi
    #管理工具ipvsadm不存在就安装
    [ ${count_pkg} -eq  ] && yum install ipvsadm -y >/dev/null    #先检查一下网址通不通
    for  i in ${wbs[@]}
    do        web_code=$(curl -o /dev/null  -w "%{http_code}" -s  $i)
        if [ "${web_code}" == "" ]
        then
            echo "${i} is ok"
             ipvsadm -a -t 10.0.0.13: -r $i -g -w         else
            echo "添加的服务 ${i} 没有打开"         fi            done}stop () {    count_vip_check=$(ip a|grep 10.0.0.1[]|wc -l)
    if [ ${count_vip_check} -eq  ]
    then        echo "虚拟IP 不存在"
        exit
    else
        ip addr del 10.0.0.13/ dev eth0
        ipvsadm -C
    fi }case "$1" in start)    start
    ;;stop)    stop
    ;;restart)    stop
    sleep
    start
    ;;*)
    echo "Usage {start|stop|restart}"
;;esac

================================

下面是改过的比上面好

[root@lb04 scripts]# cat lv_manager.sh
#!/bin/bash#定义只能是root用户执行
if [ $UID -ne  ];then
    echo "permission deny  必须root用户执行"
    exitfi
#文件存在就加载文件
[ -f /etc/init.d/functions ] && . /etc/init.d/functions#定义绑定的虚拟ipvip_netmask=10.0.0.13/service_addr=10.0.0.13:
wbs=(
10.0.0.17:
10.0.0.18:
)count_pkg=$(rpm -qa|egrep ipvsadm|wc -l)function start () {
    #检查虚拟IP个数,IP检测和ipvsadm -ln两种方法检查
    count_vip_check=$(ip a|grep 10.0.0.1[]|wc -l)
    count_vip_check2=$(ipvsadm -ln|grep "10.0.0.1[3]:80"|wc -l)
    if [ ${count_vip_check} -eq  -o ${count_vip_check2} -eq   ]
    then
        echo "${count_vip_check} 本地虚拟IP已经存在,将退出" && exit
    else
        check_count=$(nmap 10.0.0.13|grep "Host is up"|wc -l)
        [ ${check_count} -gt  ] && echo "远端 13 ip开启,将退出" && exit
        ip addr add 10.0.0.13/ dev eth0
        ipvsadm -C
        ipvsadm --set
        ipvsadm -A -t 10.0.0.13: -s wrr -p
    fi
    #管理工具ipvsadm不存在就安装
    [ ${count_pkg} -eq  ] && yum install ipvsadm -y >/dev/null    #先检查一下网址通不通
    for  i in ${wbs[@]}
    do        web_code=$(curl -o /dev/null  -w "%{http_code}" -s  $i)
        if [ "${web_code}" == "" ]
        then
            echo "${i} is ok"
             ipvsadm -a -t 10.0.0.13: -r $i -g -w         else
            echo "添加的服务 ${i} 没有打开"         fi            done}stop () {    count_vip_check=$(ip a|grep 10.0.0.1[]|wc -l)
    if [ ${count_vip_check} -eq  ]
    then        echo "虚拟IP 不存在"
        exit
    else
        ip addr del 10.0.0.13/ dev eth0
        ipvsadm -C
    fi }case "$1" in start)    start
    ;;stop)    stop
    ;;restart)    stop
    sleep
    start
    ;;*)
    echo "Usage {start|stop|restart}"
;;esac