shell编写循环检查脚本

背景:如下脚本实现当微服务重启后,检查微服务的启动端口正常,可通过轮询的方式来实现
所需要用到配置文件config.properties信息如下:

onlineService:8001
algorthService:8002
recallService:8003
sortService:8004

 实现方案:定义一个flag标记与重试的次数,使用do-while循环,当检查命令执行成功、或者达到重试最大次数时终止,

代码如下：

if [ "X${whoami}" != "Xbk" ];then
{
    echo "current user i not bk"
    exit 1
}
fi

#修改配置
for service in `cat config.properties|awk -F ':' '{print $1}'`;
    do
        sed -i "s#^  name:{{getv.*#name:test#g" /opt/easyconf/etc/bk/$service/config.yaml
        sed -i "s#^  regoin:{{getv.*#regoin:delivery#g" /opt/easyconf/etc/bk/$service/config.yaml
        sed -i "s#^  availableZone:{{getv.*#availableZone:online#g" /opt/easyconf/etc/bk/$service/config.yaml
        echo "$service的easyconf下microservice文件修改成功"
    done
    echo "等待60s，easyconf同步时间"
    
#重启
for service in in `cat config.properties|awk -F ':' '{print $1}'`;
    do
        #echo /opt/bk/$service/browser-$service/bin
        sh /opt/bk/$service/$service/bin/start.sh > /dev/null 2>&1
        echo "${service}服务开始重启"
    done
    
    #循环检查5次
    #循环检查5次 
    echo "等待60s，验证服务状态，最多重试间隔10s*5次"
    sleep 60
    count = 0 #记录重试次数
    flag = 0 #重试标识，flag=0表示任务正常，flag=1表示需要进行重试
    for i in `cat config.properties|awf -F ':' '{print $1}'`;done
        i1 = `echo "$i"|awk -F ':' '{print $1}'`
        i2 = `echo "$i"|awk -F ':' '{print $2}'`
        while [ 0 -eq 0]
        do
            echo "....................job begin check-${i1}服务....................."
            #.....添加要执行的内容，flag的值在这个逻辑中更改为1，或者不变..........
            netstat -ntpl |grep ${i2} > /dev/null 2>&1
            flag = $?
            #检查和重试过程
            if [ $flag -eq 0 ];then#执行成功，不重试
                echo "....................job complete(${i1}服务重启成功................."
                break;
            else #执行失败，重试
                count = $[${count}+1]
                if [ ${count} -eq 5];then #执行重试次数，重试超过5次即失败
                    echo 'timeout,exit.'
                    break
                fi
                echo "....................retry ${count} in 10 seconds................."
                sleep 10
            fi
        done
    done
    echo "执行成功，微服务均配置与重启成功"