Shell脚本练练手

每次在JBOSS发布ear包的时候，都需要敲一堆命令来完成。通过shell脚步，把所需的命令整合在一起，减少了工作量，同时也减少步骤出错（如：忘了把老的ear包备份）。
下面的Shell脚本完成了：杀进程、备份、发布和启动。

如：在linux服务器下，/usr1/demo.ear是新的ear包，/usr1/jbosshome 是jboss的目录，/usr1/earbak是ear包备份的路径。启动时，输入ingling

#!/bin/bash
#create by thd,use for auto publish jboss application
#sourceEarPath: the new ear package path
#jbosshome: the jboss root path
#backupDir: use to backup old ear package 
#earPackName: the ear package name in jboss_home/server/default/deploy

src=""
dest=""
backup=""
filename=""
datestr=`date +"%Y%m%d"`

if [ $# -ne 4 ]; then
	echo "Parameters: sourceEarPath jbosshome backupDir earPackName"
	exit 1
else
	src="$1"
	dest="$2"
	backup="$3"
	filename="$4"
	ear=`echo "$filename" | cut -d "." -f2`
	if [ "$ear" != "ear" ]; then
		echo "earPackName suffix is $ear, must be 'ear' "
		exit 1
	fi
fi

echo "sourceEarPath=$src"
echo "JBOSS_HOME=$dest"
echo "backupDIR=$backup"
echo "filename=$filename"

if [ -f "$src/$filename" ]; then
	echo ""
else
	echo "File not exits:$src/$filename"
	exit 1
fi

#EAR包是否在JBOSS的deploy目录
if [ -f "$dest/server/default/deploy/$filename" ]; then
	echo ""
else
	choice="n"
	echo "File not exists:$dest/server/default/deploy/$filename,continue?(y|n):"
	read choice
	case $choice in 
	'n'|'N')
		exit 1;;
	esac	
			
fi

#确定备份的ear包名称
tmpfilename="${filename%%.ear*}"
if [ -f "$backup/$tmpfilename$datestr.ear" ]; then

	k=0
	while [ -f "$backup/$tmpfilename$datestr-$k.ear"  ]
	do
		let k=$k+1
	done 
	datestr="$datestr-$k"
fi
echo "Backup to : $backup/$tmpfilename$datestr.ear"

#找出需要kill的JBOSS进程PID，通过awk查找PPID不为0的PID,同时需要过滤grep的进程
#find the pid of jboss which is going to be killed
process=`ps -ef | grep jboss |grep -v $0 | grep -v grep| awk 'BEGIN{a=0;}{if($3!=1) {a=$2;}else{a=0;} }END{printf("%d",a);}' `

#循环等待kill
if [ "$process" != "0" ]; then
	echo "killing $process"
	kill $process
	t=0
	i=0
	while [ $process -gt 0  ]
	do
		#kill the process and wait for a moment
		sleep 1
		#if the process of jboss is not be killed
		process=`ps -ef | grep jboss |grep -v $0 | grep -v grep| wc -l `

		let i=$i+1
		echo "$i s"
		#如果40秒还kill不了，就加上-9了
		if [ $i -gt 40 ]; then
			if [ $t -eq 0 ]; then
				echo "Kill $process was failed(lasted 40 seconds),try kill forced."
				kill -9 $process
				i=20
				t=1
			else
				echo "kill was failed,exit"
				exit 1
			fi
		fi
	done		
	
	#backup the EAR package in jboss 
	echo "cp $dest/server/default/deploy/$filename to  $backup/$tmpfilename$datestr.ear"
	cp $dest/server/default/deploy/$filename $backup/$tmpfilename$datestr.ear

	#copy new EAR package to jboss
	echo "copy $src/$filename to $dest/server/default/deploy/$filename"
	cp -f $src/$filename $dest/server/default/deploy/$filename

	#clear the tmp folder
	echo "cleaning $dest/server/default/tmp/*"
	rm -rf $dest/server/default/tmp/*
	
	#clear the work folder
	echo "cleaning $dest/server/default/work/*"
	rm -rf $dest/server/default/work/*

	#start jboss
	echo "starting server"
	cd $dest/bin
	nohup sh $dest/bin/run.sh -c default  1>>$dest/bin/logs/start.log 2>&1 &

	sleep 10
	tail -f $dest/bin/logs/start.log

else
	echo "Can't find the jboss PID"
	exit 1
fi 
exit 0