Linux 如何将java服务注册为Linux系统服务启动

客官°小女子只卖身不卖艺 2022-05-25 05:58 902阅读 0赞

# Linux 如何将java服务注册为Linux系统服务启动 #

## 前言 ##

当注册为系统服务启动之后，对于程序的管理更加简单方面。

systemctl start test-demo-api.service //启动项目
    systemctl stop test-demo-api.service //停止项目
    systemctl restart test-demo-api.service //重启项目
    systemctl status test-demo-api.service //查看项目状态

而且当程序被异常关闭之后，服务会将程序自动拉起

## 第一步服务脚本编写 ##

[Unit]
    Description=test demo api service by java
    Documentation=https://www.xxxxx.com
    After=network.target
    
    [Service]
    User=nobody
    #Type=forking
    PIDFile=/run/testDemoAPI.pid
    ExecStart=/bin/sh -c '/usr/bin/java -jar /usr/local/src/testDemoAPI/testdemoapi.jar >> /var/log/testDemoApi.log 2>&1'
    SuccessExitStatus=143
    TimeoutStopSec=10
    Restart=on-failure
    RestartSec=5
    
    [Install]
    WantedBy=multi-user.target

## 第二步将应用程序放到指定的文件路径下 ##

将程序jar包放到脚本中指定的路径下

mv testdemoapi.jar /usr/local/src/testDemoAPI/

## 第三步将写好的脚本放到系统服务目录下 ##

将程序jar包放到脚本中指定的路径下

mv test-demo-api.service /usr/lib/systemd/system/
    ## reload 
    systemctl daemon-reload

## 第四步启动服务 ##

将程序jar包放到脚本中指定的路径下

systemctl start test-demo-api.service
    //启动服务时可能会因为没有权限创建/var/log/testDemoApi.log文件报错

使用命令行查看原因

运行命令行：systemctl status test-demo-api.service
    [root@localhost system]# systemctl status test-demo-api.service
    ● base-info-api.service - base info api service by java
       Loaded: loaded (/usr/lib/systemd/system/est-demo-api.service; disabled; vendor preset: disabled)
       Active: activating (auto-restart) (Result: exit-code) since 三 2017-09-20 17:11:43 CST; 3s ago
         Docs: https://www.hocyun.com
      Process: 7496 ExecStart=/bin/sh -c /usr/bin/java -jar /usr/local/src/testDemoAPI/testdemoapi.jar >> /var/log/testDemoAPI.log 2>&1 (code=exited, status=1/FAILURE)
     Main PID: 7496 (code=exited, status=1/FAILURE)
    
    9月 20 17:11:43 localhost.localdomain systemd[1]: Unit test-demo-api.service entered failed state.
    9月 20 17:11:43 localhost.localdomain systemd[1]: test-demo-api.service failed.
    
    运行命令行：journalctl -xe
    
    得知：
    9月 20 17:14:05 localhost.localdomain sh[7579]: /bin/sh: /var/log/testDemoAPI.log: 权限不够
    9月 20 17:14:05 localhost.localdomain systemd[1]: base-info-api.service: main process exited, code=exited, status=1/FAILURE
    9月 20 17:14:05 localhost.localdomain systemd[1]: Unit base-info-api.service entered failed state.
    9月 20 17:14:05 localhost.localdomain systemd[1]: base-info-api.service failed.
    9月 20 17:14:10 localhost.localdomain systemd[1]: base-info-api.service holdoff time over, scheduling restart.
    9月 20 17:14:10 localhost.localdomain systemd[1]: Started base info api service by java.

我们帮他创建好这个日志文件并且将用户权限改为nobody

touch /var/log/testDemoAPI.log //创建文件
    
    chown nobody:nobody testDemoAPI.log//并且将文件权限改为nobody

## 第五步启动项目 ##

systemctl start test-demo-api.service

## 一个项目的测试文件。 ##

[Unit]
    Description=VipKStatusServer
    After=network.target
    
    [Service]
    WorkingDirectory=/opt/VipKStatusServer
    ExecStart=/usr/local/java/jdk1.8.0_144/bin/java -jar /opt/VipKStatusServer/VipKStatusServer.jar >VipKStatusServer.log
    ExecStop=kill $MAINPID
    Restart=always
    
    [Install]
    WantedBy=multi-user.target