最近因为护网行动，每天都要对服务器进行开、关机操作。为了省事儿，对Jenkins服务进行开机自动启动服务改造。实现如下：
1. 通过chkconfig --list命令列出系统中已安装的服务及其启动状态
- [root@qy-ggyf-zyl-32 ~]# chkconfig --list
- Note: This output shows SysV services only and does not include native
- systemd services. SysV configuration data might be overridden by native
- systemd configuration.
- If you want to list systemd services use 'systemctl list-unit-files'.
- To see services enabled on particular target use
- 'systemctl list-dependencies [target]'.
- celeryd-Server_soinnx 0:off 1:off 2:on 3:on 4:on 5:on 6:off
- netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
- network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
- [root@qy-ggyf-zyl-32 ~]#
2. 创建启动脚本
在/etc/init.d/目录下，创建Jenkins启动脚本
脚本内容如下：
- #!/bin/bash
- #chkconfig:2345 80 90
- #decription:启动Jenkins
- nohup /usr/local/jdk-11.0.17/bin/java -jar /usr/local/jenkins.war &
#请将/usr/local/jdk-11.0.17/bin/java和usr/local/jenkins.war替换为实际的路径。
3. 编辑完脚本后对脚本进行赋权
- chmod +x jenkins_startup.sh
4. 将脚本添加进清单
- chkconfig --add jenkins_startup.sh
5. 添加完毕后查看清单
- [root@qy-ggyf-zyl-32 ~]# chkconfig --list
- Note: This output shows SysV services only and does not include native
- systemd services. SysV configuration data might be overridden by native
- systemd configuration.
- If you want to list systemd services use 'systemctl list-unit-files'.
- To see services enabled on particular target use
- 'systemctl list-dependencies [target]'.
- celeryd-Server_soinnx 0:off 1:off 2:on 3:on 4:on 5:on 6:off
- jenkins_startup.sh 0:off 1:off 2:on 3:on 4:on 5:on 6:off
- netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
- network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
- [root@qy-ggyf-zyl-32 ~]#
至此，完成了Jenkins随操作系统启动自启服务的操作，也可以使用service jenkins_startup.sh start/stop/restart命令来重启服务。
问题记录及调试过程：
① 最初的脚本内容：
- #!/bin/bash
- #chkconfig:2345 80 90
- #decription:启动Jenkins
- nohup java -jar /usr/local/jenkins.war &
② Java设置了环境变量，但是开机启动Jenkins服务失败，手动调试也出现报错，如下：
- [root@qy-ggyf-zyl-32 init.d]# service jenkins_startup.sh restart
- [root@qy-ggyf-zyl-32 init.d]# nohup: appending output to 'nohup.out'
- nohup: failed to run command 'java': No such file or directory
③ 查看Java路径：
- [root@qy-ggyf-zyl-32 init.d]# which java
- /usr/local/jdk-11.0.17/bin/java
④ 将jenkins_startup.sh的Java路径改写为绝对路径：/usr/local/jdk-11.0.17/bin/java，再次执行service jenkins_startup.sh restart，服务重启成功，Jenkins服务也实现了开机自启动。
- [root@qy-ggyf-zyl-32 init.d]# service jenkins_startup.sh restart
- [root@qy-ggyf-zyl-32 init.d]# nohup: appending output to 'nohup.out'
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