Java 程序的自动安装

我用过Java service wrapper，很好。不过我也能自己制作脚本完成基本功能。肯定没有Java service wrapper功能全面，不过够用了，而且完全掌控。

目标：

1.从Maven项目中产生安装包

2.将安装包安装成Ubuntu service。

我的Java程序是用来发送email的，通过读取MongoDB的email内容，发送信息。同时还依赖一个config.xml文件作为启动参数，里面配置了MongoDB的基本信息和SMTP服务器的基本信息。

现在通过执行一个脚本create_deploy.sh来制作安装包。该脚本内容如下：

#!/bin/bash

source ./tool.sh

mvn clean package -DskipTests
mvn dependency:copy-dependencies


removeFolder deploy
mkdir deploy
cp -r ./target/dependency ./deploy
cp ./target/email-1.0.jar ./deploy
cp ./config.xml ./deploy
cp ./email ./deploy
cp ./install.sh ./deploy
cp ./tool.sh ./deploy

依赖的tool.sh脚本内容：

#!/bin/bash

function removeFolder {

    if [ -d "$1" ]
    then
	echo "$2 folder exists already, remove it..."
	rm -rf $1
    else
	echo "$2 folder doesn't exists"
    fi
}

#$1 src folder
#$2 dst folder
function copyFolder {

    if [ -d "$2" ]
    then
	echo "$2 folder exists already, remove it..."
	rm -rf $2
    else
	echo "$2 folder doesn't exists, start copying..."
    fi
    cp -r $1 $2
}


#remove the folder if exists already
#$1 folder path
function createFolder {

    if [ -d "$1" ]
    then
	echo "$1 folder exists already, remove it..."
	rm -rf $1
    else
	echo "$1 folder doesn't exists, create it..."
    fi
    mkdir -p $1
}

#remove the link if exists already
#create a link($2) to file($1)
function createLink {

    if [ -L "$2" ]
    then
	echo "$2 link exists already, removing it..."
	rm $2
    else
	echo "$2 link doesn't exists, creating it..."
    fi
    echo "creating link: $2 to $1"
    ln -s $1 $2
}

#$1 source file name
#$2 source folder
#$3 destion folder
#remove the file if exists already
#create a file
function copyFile {
    if [ -f "$3/$1" ]
    then
	echo "$3/$1 exists already, removing it..."
	rm $3/$1
    else
	echo "$3/$1 doesn't exists, copying it..."
    fi
    cp $2/$1 $3
}




# $1 variable name
# $2 expected value
# put this into /etc/environment if not found
function setEnv {
    source /etc/environment
    if [ "${!1}" = "$2" ]
    then
	echo "$1 is correct: $2"
    else
	echo "$1 is wrong: ${!1} != $2"

	h=`grep "$1=\"$2\"" /etc/environment`
	if [ -n "$h" ]
	then
	    echo "/etc/environment has $1 already"
	else
	    echo "Adding $1 into /etc/environment..."
	    echo "$1=\"$2\"" >> /etc/environment
	fi
	source /etc/environment
    fi
}

#$1 means the full name of dpkg
#return 1 if dpkg is installed (found 'ii dpkg-name' in the returned string)
#otherwise return 0
function hasDpkg {
    r=`dpkg -l | grep "$1"`
    if [ -n "$r" ]
    then
	h=`dpkg -l | grep "ii  $1"`
	if [ -n "$h" ]
	then
	    return 1
	else
	    return 0
	fi
    else
	return 0
    fi
}

#$1 search string
#$2 file path
#return 1 if found
#return 0 if not found
function findStringInFile {
    h=`grep "$1" $2`
    echo "h: $h"
    if [ -n "$h" ]
    then
	return 1
    else
	return 0
    fi
}


#$1 dpkg name
function installDpkg {
    hasDpkg $1
    r=$?
    
    if [ $r -eq 1 ]
    then
	echo "$1 was installed"
    else
	echo "$1 was not installed, installing..."
	apt-get install $1
    fi
}

#$1 user name
#return 1 if exists
#return 0 if doesn't exist
function hasUser {
    h=`grep "$1" /etc/passwd`
    echo "h: $h"
    if [ -n "$h" ]
    then
	return 1
    else
	return 0
    fi
}

#$1 user group name
#return 1 if exists
#return 0 if doesn't exist
function hasUserGroup {
    h=`grep "$1" /etc/group`
    echo "h: $h"
    if [ -n "$h" ]
    then
	return 1
    else
	return 0
    fi
}

#remove user and home folder
#then create then again
function recreateSystemUserAndFolder {
    hasUser $1
    r=$?
    
    if [ $r -eq 1 ]
    then
	echo "$1 exits already,remove it..."
	userdel -r $1
    else
	echo "$1 doesn't exist,create it..."
    fi
    adduser --home /home/$1 --system --shell /bin/bash $1  
}

#remove user group 
#then create it again
function recreateUserGroup {
    hasUserGroup $1
    r=$?
    if [ $r -eq 1 ]
    then
	echo "$1 exists already, remove it..."
	delgroup $1
    else
	echo "$1 doesn't exist, create it..."
    fi
    groupadd $1
}

create_deploy脚本创建了deploy目录，通过mvn命令生成jar包和依赖包，然后将这些都复制进deploy目录，同时还有另外三个文件：

config.xml是配置文件，启动时需要

install.sh是将email-1.0.jar安装成service的脚本

email是要放在/etc/init.d/下的脚本

创建deploy成功后，进入deploy目录，运行install.sh文件，安装成功。服务启动。

看看install.sh文件内容：

#!/bin/bash

source ./tool.sh

createFolder /home/dist/email/
cp -r ./dependency /home/dist/email/
copyFile email-1.0.jar $PWD /home/dist/email/
copyFile config.xml $PWD /home/dist/email/

copyFile email $PWD /etc/init.d
chmod +x /etc/init.d/email
update-rc.d email defaults
service email start

再看看email脚本内容：

!/bin/sh

### BEGIN INIT INFO
# Provides:     email server
# Required-Start:
# Required-Stop:
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description: email
# Description: email server
### END INIT INFO

. /lib/lsb/init-functions

export JAVA_HOME=/usr/jdk1.6
export PATH="$JAVA_HOME/bin:$PATH"

case "$1" in
  start)
     log_begin_msg "Starting email server"
     java -cp /home/dist/email/dependency/ -jar /home/dist/email/email-1.0.jar /home/dist/email/config.xml &
     log_end_msg 0
     ;;
  stop)
     PID=`ps -ef | grep 'email-1.0.jar' | grep -v grep | awk '{print $2}'`
     log_begin_msg "Stopping email server"
     if [ ! -z "$PID" ]; then
        kill -15 $PID
     fi
     log_end_msg 0
     ;;
  restart)
     $0 stop
     $0 start
     ;;
  *)
     log_success_msg "Usage: service email {start|stop|restart}"
     exit 1
esac

exit 0