CentOS8 systemd 自动启动 JAR

小咪咪 2022-10-16 08:45 205阅读 0赞

前不久华为云崩溃了，恢复以后还要登录服务器手动把项目跑起来，emmm，万一项目多几个那不就尴尬了。作为优秀劳动生产能手的我，当然还要了解一下自动化运维啊。那么试试让项目跟随服务器启动自启吧。实验所用的是 CentOS8 ，自启方面跟测试服务器的 CentOS7 差别不大

首先，写一个最简单的 Springboot 应用，里面放一个 web 页面。项目结构大概就这样，懂的都懂。因为是测试的，所以这是很简单了

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x5ZnF5cg_size_16_color_FFFFFF_t_70][]

写完打包成jar，上传 **CentOS8** 。我放在 **/home** 路径下，命名为 ifrs17-service.jar

安装 **JDK** 这种就不废话了，接下来先写一个手动启动的脚本 **autodeploy.sh**

\----------------------------------------------------------------------------------------------------------------------------------------------

\#!/bin/bash

echo "-------source /etc/profile--------------------------------" >> /usr/local/ifrs17/azure/server/1.txt

source /etc/profile

echo "-------export JDK--------------------------------" >> /usr/local/ifrs17/azure/server/1.txt

export JAVA\_HOME=/usr/local/jdk1.8.0\_172

export PATH=$\{JAVA\_HOME\}/bin:$PATH

echo "-------ifrs17 system service starting--------------------------------" >> /usr/local/ifrs17/azure/server/1.txt

APP\_NAME="ifrs17-service.jar"

usage() \{

echo "case: sh autodeploy.sh \[start|stop|restart|status\]"

exit 1

isExist()\{

\#grep -v grep 反向选取记录行，此处为选取不带grep内容的结果

\#awk 选取列

pid=\`ps -ef | grep $\{APP\_NAME\} | grep -v grep | awk '\{print $2\}'\`

\#如果不存在返回1，存在返回0

if \[ -z "$\{pid\}" \]; then

return 1

else

return 0

start()\{

isExist

if \[ $? -eq "0" \]; then

echo "$\{APP\_NAME\} is already running,pid = $\{pid\}."

else

nohup java -jar "/usr/local/ifrs17/azure/server/$\{APP\_NAME\}" > /usr/local/ifrs17/azure/server/console.log 2>&1 &

echo $! > /usr/local/ifrs17/azure/server/pid.log

echo "$\{APP\_NAME\} start success"

stop()\{

isExist

if \[ $? -eq "0" \]; then

kill -9 $\{pid\}

else

echo "$\{APP\_NAME\} is not running"

status()\{

isExist

if \[ $? -eq "0" \]; then

echo "$\{APP\_NAME\} is running. Pid is $\{pid\}"

else

echo "$\{APP\_NAME\} is not running"

restart()\{

stop

start

case "$1" in

"start")

start

;;

"stop")

stop

;;

"status")

status

;;

"restart")

restart

;;

\*)

usage

;;

esac

\----------------------------------------------------------------------------------------------------------------------------------------------

通过脚本也可以手动启动项目，脚本会自检项目是否启动，并输出对应的信息

![20210528164916565.png][]

脚本写完，就是自启的重头戏，在 **/etc/systemd/system** 创建 **autodeploy.service**

\----------------------------------------------------------------------------------------------------------------------------------------------

\[Unit\]

Description=ifrs17 system service auto start

After=syslog.target network.target nss-lookup.target

\[Service\]

User=root

Type=forking

ExecStart=/bin/sh /usr/local/ifrs17/azure/server/autodeploy.sh start

ExecReload=/bin/sh /usr/local/ifrs17/azure/server/autodeploy.sh restart

ExecStop=/bin/sh /usr/local/ifrs17/azure/server/autodeploy.sh stop

\[Install\]

WantedBy=multi-user.targe

\----------------------------------------------------------------------------------------------------------------------------------------------

这里不要用 ./home/autodeploy.sh start ，亲测报错…

写完保存，执行

systemctl enable autodeploy.service

发现系统将创建一个软连接到 /etc/systemd/system/multi-user.target.wants

此时重启就可以完成自启了

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x5ZnF5cg_size_16_color_FFFFFF_t_70]: /images/20221014/3c5fe6cd3ceb4d5ea139f92cdaae3688.png
[20210528164916565.png]: /images/20221014/7e0f470e702243fbbcc95cb90786b3e1.png