Centos java standalone service - boot on start

最新推荐文章于 2024-05-22 08:37:14 发布

kiwi小白

最新推荐文章于 2024-05-22 08:37:14 发布

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分类专栏： DevOps java 文章标签： centos daemon service

本文链接：https://blog.csdn.net/kiwi_coder/article/details/39502721

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本文介绍了一个用于启动和管理Web应用程序守护进程的shell脚本实现，包括如何通过cron任务自动启动该守护进程。

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假设我们已经有一个web应用的standalone jar包：hello.jar

在命令行启动：java -jar hello.jar

我们先暂时把hello.jar放在了根目录下

Money see，Monkey do

模仿crond，注意/etc/init.d/hello需要可执行权限

1. /etc/init.d/hello

#!/bin/sh
#
# hello Start/Stop the hello daemon.
#
# chkconfig: 2345 95 20
# description: hello api server

### BEGIN INIT INFO
# Provides: hello thoughtworks
# Required-Start: $local_fs $syslog
# Required-Stop: $local_fs $syslog
# Default-Start: 2345
# Default-Stop: 95
# Short-Description: run hello api daemon
# Description: hello api server
### END INIT INFO

[ -f /etc/sysconfig/hello ] || {
[ "$1" = "status" ] && exit 4 || exit 6
}

RETVAL=0
prog="hello"
exec=/usr/sbin/hello
lockfile=/var/lock/subsys/hello
config=/etc/sysconfig/hello

# Source function library.
. /etc/rc.d/init.d/functions

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

start() {
if [ $UID -ne 0 ] ; then
echo "User has insufficient privilege."
exit 4
fi
[ -x $exec ] || exit 5
[ -f $config ] || exit 6
echo -n $"Starting $prog: "
daemon $prog $HELLOARGS
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
}

stop() {
if [ $UID -ne 0 ] ; then
echo "User has insufficient privilege."
exit 4
fi
echo -n $"Stopping $prog: "
if [ -n "`pidfileofproc $exec`" ]; then
killproc $exec
RETVAL=3
else
failure $"Stopping $prog"
fi
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
}

restart() {
stop
start
}

reload() {
echo -n $"Reloading $prog: "
if [ -n "`pidfileofproc $exec`" ]; then
killproc $exec -HUP
else
failure $"Reloading $prog"
fi
retval=$?
echo
}

force_reload() {
# new configuration takes effect after restart
restart
}

rh_status() {
# run checks to determine if the service is running or use generic status
status -p /var/run/hello.pid $prog
}

rh_status_q() {
rh_status >/dev/null 2>&1
}

case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
restart
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
exit 2
esac
exit $?