由於目前多元件的開發模式，導致一個服務可能是由多個元件同時支援的，所以判斷這些元件的正常執行就變得比較重要了，之前是根據資料流向，由源頭開始判斷，命令繁瑣，且時間長了，命令也就不記得了。所以想編寫一個指令碼，進行服務的status判斷：

以agent+kafka +tomcat為例：

#!/bin/bash

serviceListening(){
   command=`netstat -ln|grep $2`
   if [  "$command" == "" ]
   then
	echo -e "\033[31m$1 not started \033[0m" 
   else
	echo "$1 is started"
   fi
	
}

serviceStatus(){
 command=`ps aux|grep $2 |grep -v "grep"`
   if [  "$command" == "" ]
   then
	echo -e "\033[31m$1 not started \033[0m" 
   else
        echo "$1 is started"
   fi

}
#listen port
#DB
echo -e  "\033[32mDB status\033[0m"
serviceListening mysql 3306
#Component 
echo -e  "\033[32mComponent status\033[0m"
serviceListening kakfa 9092
serviceStatus agent appmaster
#web
echo -e  "\033[32mWEB status\033[0m"
serviceListening tomcat 80
 

輸出：

DB status
mysql is started
Component status
kakfa is started
agent not started 
WEB status
tomcat not started