Install Jenkins in Ubuntu 18.04 LTS failed (Failed to start LSB: Start Jenkins at boot time.)

Question

[Symptoms]

• Install Jenkins by using official steps, but failed with error message Failed to start LSB: Start Jenkins at boot time.

• Reproduce Steps

  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 

• Console log

  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 ... 

[Environment]

• Ubuntu 18.04 LTS Beta2
• Jenkins 2.107.2

Answer 1

[Root cause]

• Ubuntu 18.04 LTS use Java 9 as default java
• Jenkins 2.107.2 still use Java 8

[Solution]

• Install Java 8 before install Jenkins

  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. Install java 8

sudo apt install openjdk-8-jre 

2. Set default java version as java 8

sudo update-alternatives --config java 

3. Add the key

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

4. Add repository

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

5. Install jenkins

sudo apt install jenkins