在Ubuntu 18.04 LTS中安装Jenkins失败(无法启动LSB:启动时启动Jenkins.)

Question

[症状]

• 使用官方步骤安装Jenkins,但失败并显示错误消息无法启动LSB:在启动时启动Jenkins.

• 重现步骤

  wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
  sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary/"
  sudo apt install jenkins
  

• 控制台日志

  gaspar@jenkins:~$ sudo apt install jenkins
  ...
  Setting up default-jre-headless (2:1.9-62ubuntu2) ...
  Setting up jenkins (2.107.2) ...
  Job for jenkins.service failed because the control process exited with error code.
  See "systemctl status jenkins.service" and "journalctl -xe" for details.
  invoke-rc.d: initscript jenkins, action "start" failed.
  ? jenkins.service - LSB: Start Jenkins at boot time
     Loaded: loaded (/etc/init.d/jenkins; generated)
     Active: failed (Result: exit-code) since Thu 2018-04-19 10:03:05 UTC; 9ms ago
       Docs: man:systemd-sysv-generator(8)
    Process: 27282 ExecStart=/etc/init.d/jenkins start (code=exited, status=7)
  Apr 19 10:03:03 evt-jenkins systemd[1]: Starting LSB: Start Jenkins at boot time...
  Apr 19 10:03:03 evt-jenkins jenkins[27282]:  * Starting Jenkins Automation Server jenkins
  Apr 19 10:03:03 evt-jenkins su[27313]: Successful su for jenkins by root
  Apr 19 10:03:03 evt-jenkins su[27313]: + ??? root:jenkins
  Apr 19 10:03:03 evt-jenkins su[27313]: pam_unix(su:session): session opened for user jenkins by (uid=0)
  Apr 19 10:03:03 evt-jenkins su[27313]: pam_unix(su:session): session closed for user jenkins
  Apr 19 10:03:05 evt-jenkins jenkins[27282]:    ...fail!
  Apr 19 10:03:05 evt-jenkins systemd[1]: jenkins.service: Control process exited, code=exited status=7
  Apr 19 10:03:05 evt-jenkins systemd[1]: jenkins.service: Failed with result 'exit-code'.
  Apr 19 10:03:05 evt-jenkins systemd[1]: Failed to start LSB: Start Jenkins at boot time.
  dpkg: error processing package jenkins (--configure):
   installed jenkins package post-installation script subprocess returned error exit status 1
  ...
  

[环境]

• Ubuntu 18.04 LTS Beta2
• 詹金斯2.107.2

Answer 1

[根本原因]

• Ubuntu 18.04 LTS使用Java 9作为默认java
• Jenkins 2.107.2仍然使用Java 8

[解]

• 在安装Jenkins之前安装Java 8

  sudo add-apt-repository ppa:webupd8team/java
  sudo apt install oracle-java8-installer
  wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
  sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary/"
  sudo apt-get update
  sudo apt install jenkins
  

Answer 2

1. 安装Java 8

sudo apt install openjdk-8-jre

2. 将默认Java版本设置为Java 8

sudo update-alternatives --config java

3. 添加密钥

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -

4. 添加资料库

sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary/"

5. 安装詹金斯

sudo apt install jenkins