bash 在 Centos 上启动时启动 Java 应用程序
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Launch Java application at startup on Centos
提问by Ferite
I need to launch a Java application on Centos (5.9) startup.
我需要在 Centos (5.9) 启动时启动一个 Java 应用程序。
I am trying to start a simple script (named "lanzar.sh") on Centos at boot time:
我试图在启动时在 Centos 上启动一个简单的脚本（名为“lanzar.sh”）：
#!/bin/sh
cd /home/someuser/Desktop/Dist
java -jar SomeApp.jar
I append the line "/bin/sh /home/someuser/Desktop/Dist/lanzar.sh" to /etc/rc.d/rc.local. But the java application does not start. I have:
我将“/bin/sh /home/someuser/Desktop/Dist/lanzar.sh”行附加到/etc/rc.d/rc.local。但是java应用程序没有启动。我有：
- Granted 755 rights to the /etc/rc.d/rc.local file
- Write the content of the "lanzar.sh" into /etc/rc.d/rc.local. Separated with semicolon, and in different lines.
- Changing "lanzar.sh" of location.
- Other things, taken from other threads that did not work for me.
- 授予对 /etc/rc.d/rc.local 文件的 755 权限
- 将“lanzar.sh”的内容写入/etc/rc.d/rc.local。用分号分隔，并在不同的行中。
- 更改位置的“lanzar.sh”。
- 其他东西，取自其他对我不起作用的线程。
My rc.loca looks like:
我的 rc.loca 看起来像：
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
#
#Some comment
#Some comment
#Some comment
touch /var/lock/subsys/local
/bin/sh /home/fernando/Desktop/Dist/lanzar.sh
Note: I know similar questions have been asked before, but after testing many of the answers that I have found by googling with no success, I had to ask this myself.
注意：我知道以前有人问过类似的问题，但是在测试了我通过谷歌搜索找到的许多答案都没有成功之后，我不得不自己问这个问题。
回答by David W.
I highly recommend that you explore the /etc/init.ddirectory of your server and the /etc/rc3.ddirectory. See how the names of the files in /etc/rc3.dare symbolically linked to the names in the /etc/init.ddirectory. Notice how the files in /etc/rc3.dall start with Sxxor Kxxwherexx is a number between 00to 99.
我强烈建议您浏览/etc/init.d服务器的/etc/rc3.d目录和目录。查看 中文件的名称如何/etc/rc3.d符号链接到/etc/init.d目录中的名称。请注意，在文件中如何/etc/rc3.d都开始用Sxx或KXX whereXX之间的数字00来99。
What I am about to tell you is officially all wrong. These startup scripts are way more complicated today that what I describe, but it's a basic outline of what's going on.
我要告诉你的一切在官方上都是错误的。这些启动脚本今天比我描述的要复杂得多，但它是正在发生的事情的基本轮廓。
In standard Unix and Linux, startup scripts were normally stored in /etc/init.dand then linked to the /etc/rcX.ddirectory where Xstood for what was called the Init Statesof the server. (Yes, I'm linking to an SCO Unix page, but they were all pretty similar).
在标准的 Unix 和 Linux 中，启动脚本通常存储在/etc/init.d并链接到代表服务器初始状态的/etc/rcX.d目录中。（是的，我正在链接到 SCO Unix 页面，但它们都非常相似）。X
Note that Init State 3 is running in multi-user mode and that all the daemons are started. This is why I am telling you to look in /etc/rc3.d.
请注意，Init State 3 正在多用户模式下运行，并且所有守护程序都已启动。这就是为什么我告诉你往里看/etc/rc3.d。
When the server enters that init state, it runs all of the script starting with Sin alphabetical order. It runs each script with the parameter startafter it. So, S01xxxxstarts before S03xxxwhich starts before S99xxxxx.
当服务器进入该init 状态时，它会S按字母顺序运行所有脚本。它运行每个脚本，并在start其后运行参数。所以，S01xxxx在之前S03xxx开始在之前开始S99xxxxx。
When the server exits that init state, it runs all of the scripts that start with Kin alphabetical order, and passes the stopparameter to them.
当服务器退出该init 状态时，它会运行所有K以字母顺序开头的脚本，并将stop参数传递给它们。
Now, Centos, Redhat, and Fedora setup handles a lot of this for you. You specify which service you depend upon, and it figures out startup and shutdown order. However, nothing is preventing you from munging a startup script and creating your own links.
现在，Centos、Redhat 和 Fedora 安装程序为您处理了很多事情。您指定您依赖的服务，它会计算出启动和关闭顺序。但是，没有什么可以阻止您修改启动脚本并创建自己的链接。
By the way, speaking about Java programs that startup and shutdown... Jenkinsis a Java program that's started in a very similar way as your program. Here's the /etc/init.dscript I got off of Jenkins website:
顺便说一下，关于启动和关闭的 Java 程序…… Jenkins是一个 Java 程序，它的启动方式与您的程序非常相似。这是/etc/init.d我从 Jenkins 网站上获取的脚本：
#!/bin/bash
#
# Startup script for Jenkins
#
# chkconfig: - 84 16
# description: Jenkins CI server
# Source function library.
. /etc/rc.d/init.d/functions
[ -z "$JAVA_HOME" -a -x /etc/profile.d/java.sh ] && . /etc/profile.d/java.sh
JENKINS_HOME=/var/jenkins
WAR="$JENKINS_HOME/jenkins.war"
LOG="/var/log/jenkins.log"
LOCK="/var/lock/subsys/jenkins"
export JENKINS_HOME
RETVAL=0
pid_of_jenkins() {
pgrep -f "java.*jenkins"
}
start() {
[ -e "$LOG" ] && cnt=`wc -l "$LOG" | awk '{ print }'` || cnt=1
echo -n $"Starting jenkins: "
cd "$JENKINS_HOME"
nohup java -jar "$WAR" --httpPort=-1 --ajp13Port=8010 --prefix=/jenkins >> "$LOG" 2>&1 &
while { pid_of_jenkins > /dev/null ; } &&
! { tail +$cnt "$LOG" | grep -q 'Winstone Servlet Engine .* running' ; } ; do
sleep 1
done
pid_of_jenkins > /dev/null
RETVAL=$?
[ $RETVAL = 0 ] && success $"$STRING" || failure $"$STRING"
echo
[ $RETVAL = 0 ] && touch "$LOCK"
}
stop() {
echo -n "Stopping jenkins: "
pid=`pid_of_jenkins`
[ -n "$pid" ] && kill $pid
RETVAL=$?
cnt=10
while [ $RETVAL = 0 -a $cnt -gt 0 ] &&
{ pid_of_jenkins > /dev/null ; } ; do
sleep 1
((cnt--))
done
[ $RETVAL = 0 ] && rm -f "$LOCK"
[ $RETVAL = 0 ] && success $"$STRING" || failure $"$STRING"
echo
}
status() {
pid=`pid_of_jenkins`
if [ -n "$pid" ]; then
echo "jenkins (pid $pid) is running..."
return 0
fi
if [ -f "$LOCK" ]; then
echo $"${base} dead but subsys locked"
return 2
fi
echo "jenkins is stopped"
return 3
}
# See how we were called.
case "" in
start)
start
;;
stop)
stop
;;
status)
status
;;
restart)
stop
start
;;
*)
echo $"Usage: ##代码## {start|stop|restart|status}"
exit 1
esac
exit $RETVAL
It'll give you something to work with.
它会给你一些工作。
