A Guide To Configure Jenkins Instance On Ibm Power Systems

Introduction

You are here to learn to setup your own jenkins instance and my experience with jenkins in setting up continuous integration framework for Linux kernel on IBM POWER system

Prerequisites:

• Install Linux OS of your choice, I have installed RHEL8.x on PowerVM LPAR
• Setup yum repositories of the OS installed
• Install distro supported java-11-openjdk java-11-openjdk-devel packages
• Make sure port 80 and port 8080 are open in your server firewall

Jenkins installation

• Setup jenkins packages repo and install LTS version of jenkins package, I have jenkins-2.277.2-1.1 on my server

    $ wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
    $ rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key
    $ yum install jenkins
  

• Edit below parameters in /etc/syscofing/jenkins

    JENKINS_HOME="/home/jenkins"
    JENKINS_USER="root"
  

• Disable firewall and start jenkins daemon

    $ systemctl stop firewalld
    $ systemctl disable firewalld
    $ systemctl start jenkins 
    $ systemctl enable jenkins
  

• Now access the jenkins page on port 8080 using your server ip http://<jenkins-ip>:8080 via a browser
• Get the secret key in file /var/lib/jenkins/secrets/initialAdminPassword from terminal and provide it in the jenkins page
• Installed required plugins chosing custom plugin option and complete the jenkins installation following steps link
• Enable LDAP based security Goto Manage Jenkins > Configure Global Security
• Enable Project based Matrix Authorization

Configure HTTPS for jenkins

• Create self signed certificate using java keytool [details]# Configure HTTPS for jenkins details

    keytool -genkey -keyalg RSA  -alias selfsigned -keystore jenkins.jks -storepass <passwd>  -validity 3650 -keysize 2048
  

• Stop the jenkins server service jenkins stop
• Create a direcotry mkdir -p /etc/jenkins
• Copy the .jks file created by keytool command to /etc/jenkins/
• Update jenkins configuration file /etc/sysconfig/jenkins with below parameters

    JENKINS_HTTPS_KEYSTORE="/etc/jenkins/jenkins.jks"
    JENKINS_HTTPS_KEYSTORE_PASSWORD="abcdef"
    JENKINS_PORT="-1"
    JENKINS_HTTPS_PORT="8080"
  

• Restart jenkins and login again https://<jenkins-ip>:8080 using your intranet userid and password
• Setup HTTP server on jenkins

    $ yum install httpd
    Edit /etc/httpd/conf/httpd.conf and add ServerAdmin and Listen port 81
    Enable httpd service : systemctl enable httpd
    Start httpd service : systemctl start http
  

• Setup slack notification in jenkins for your channel follow this link

CI project specific configurations

• Install the below needed plugins

    pipeline, git, envinject, matrix-auth 
    Node and label parameter
    Job and Node ownership
    Build Publisher
    Slack Notification
    Build with Parameters
    Extended choice parameters
    Labeled Test Groups Publisher
    Test Results Analyzer
    Environment Script
    Rebuilder
    Flexible Publish
    Workspace cleanup
  

• Install required pacakges

  $ yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
  $ yum install python-pip
  $ pip install pexpect
  $ pip install pypy3
  $ ln -s /usr/bin/python3.7 /usr/bin/python

Thanks for reading my blog, hope this helps you setup your jenkins instance !