Setup Jenkins from scratch

Installing Jenkins on Linux mint 17.3

wget -q -O - https://jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt-get update
sudo apt-get install jenkins

Notes

• Jenkins will be launched as a daemon up on start. See /etc/init.d/jenkins
• The 'jenkins' user is created to run this service.
• Log of Jenkins is placed in /var/log/jenkins/jenkins.log
• Default configurations are set in /etc/default/jenkins
• Browse Jenkins by :8080

Installing plugins for Git+Github

Manage Jenkins -> Manage Plugins -> Available, to filter the following keywords:

• Git plugin
• GitHub plugin

Github + SSH

Manage Jenkins -> Configure System -> Git plugin

• Global Config user.name Value
• Global Config user.email Value

SSH keypair generation

sudo su jenkins
ssh-keygen -t rsa
cat /var/lib/jenkins/.ssh/id_rsa.pub

• Create a new SSH key and paste id_rsa.pub
• Confirm if the user jenkins can login into Github via SSH

ssh -vT git@github.com

Issue: Can't exec sudo from shell

sudo: no tty present and no askpass program specified

sudo chmod +w /etc/sudoers
sudo vi /etc/sudoers

• add the line to /etc/sudoers

%jenkins ALL=(ALL:ALL) NOPASSWD:ALL

Git + SSH on launchpad

• Add SSH keypair /var/lib/jenkins/.ssh/id_rsa.pub into launchpad

Issue

stderr: Host key verification failed

sudo su jenkins
git ls-remote -h git+ssh://<launchpad-id>@git.launchpad.net/<project.git> HEAD

References

[1] https://wiki.jenkins-ci.org/display/JENKINS/Installing+Jenkins+on+Ubuntu