Intro

My notes on the CICD tool

Tips And Notes

By default Jenkins will consider the build a failure if any command in the build step finishes with an exit value other than 0
A red dot next to a build indicates it failed. Blue means it is all good.

Advantages

Easy to use, web-based
Built-in documentation with examples.
Open Source
MIT License
Extensible through plugins

Installation

Jenkins can be run in all operating systems, and in Docker containers. Follow the instructions here: https://jenkins.io/download/

Azure Cloud

You can also find it as a template in the Azure marketplace : https://azuremarketplace.microsoft.com/en-us/marketplace/apps/azure-oss.jenkins?tab=Overview and instructions on how to use it here: https://docs.microsoft.com/en-us/azure/jenkins/

Install Via Docker Container

Pull the Jenkins image

Get Jenkins Image

docker pull jenkins/jenkins:lts

Run Jenkins and expose it on port 8080

Run Jenkins

docker run --detach --publish 8080:8080 --volume jenkins_home:/var/jenkins_home --name jenkins jenkins/jenkins:lts

Connects to the "Jenkins" container and executes the "cat <filename>" command to get the initial password. After this, you can connect to http://localhost:8080 and log in with the password shown. If you are inside a VM, make sure you use the browser in the VM and not your host. Alternatively, you can provide the VM's hostname followed by :8080 (eg, http://ubuntu1804lts:8080)

Execute A Command In Container

docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword

Install In Ubuntu

Commands To Install Jenkins

wget -q -O - http://pkg.jenkins-ci.org/debian-stable/jenkins-ci.org.key | apt-key add -

echo "deb http://pkg.jenkins-ci.org/debian-stable binary/" | tee -a /etc/apt/sources.list 

apt-get update && apt-get upgrade -y

apt-get -y install openjdk-8-jdk

apt-get -y install jenkins 

cat /var/lib/jenkins/secrets/initialAdminPassword

Jenkins