Jenkins-cicd

PG DO - CI/CD Pipeline with Jenkins Simplilearn

AWS Ubuntu VM Provisioning steps

• Step 1: Click on Launch Instance
• Step 2 : Click on Software Image (AMI)
• Select Ubuntu
• Step 4: Key pair name – required
• Click on Create new key pair
• Put key pair name Jenkins-sl
• & Download it
• Step 5 : Click on Launch Instance
• Step 6 : Select your VM and Click connect
• Step 7 : You can see the terminal
• Step: Showing Github example

Git Status

git --version 

cretae Dir

mkdir demo 
cd  demo 

GIT & Ubuntu SSH connection

ssh-keygen 

"Hit enter button 3 time"

cat ~/.ssh/id_rsa.pub 
git clone git@github.com:manikcloud/Jenkins-cicd.git
history 
history | cut -c 8- 

Jenkins installation on UBUNTU 18.04 & Ubuntu 22.04 (Please skip the step 2 & 3 for 22.04)

Step 1

sudo apt-get update -y && sudo apt install openjdk-8-jdk -y

Step 2: Downloading Key

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

Step 3: Adding Key

sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

Step 4: Jenkins Package installation

sudo apt-get update -y
sudo apt install jenkins -y
sudo /etc/init.d/jenkins start
sudo service jenkins status 

Step 5: Jenkins default password

sudo cat /home/labsuser/jenkins/secrets/initialAdminPassword

Step 6: History command

history | cut -c 8- 

Jenkins URL with port 8080

• http://x.x.x.x:8080/

Replace x with your ip

Change Security group rule for Jenkins

-	Select your instance 
-	Down below select your security tab 
-	Click on the Security groups sg-0c51908b5fa4abf75 (launch-wizard-2)
-	Click on the action 
-	Click on EDIT INBOUND RULE
-	Select custom TCP and put port 8080
-	Custom ip should be 0.0.0.0/0
-	Click on Save the rule

Common error

getting "E: Unable to locate package openjdk-8-jdk" message on java update

Resolution

Run this command

sudo apt update -y

Plugin Installation

dashboard>manage>jenkins>manage plugins>maven integration

Jenkins Setting

Java_Home
/usr/lib/jvm/java-8-openjdk-amd64/

Post Build Step

java -cp target/my-app-1.0-SNAPSHOT.jar com.mycompany.app.App

This project is parameterized

echo "User First name is : $First_Name"
echo "User Last name is : $Last_Name"
echo "User Gender is : $Sex"

References:

1. https://maven.apache.org/guides/getting-started/maven-in-five-minutes.html
2. https://maven.apache.org/download.cgi

Feature	Scripted Pipeline	Declarative Pipeline
Syntax	Groovy-based DSL	YAML-based DSL
Structure	Procedural style, with stages defined as functions	Declarative style, with stages defined as steps
Stage definition	Defined using stage step and block	Defined using stages section and stage steps
Parallel stages	Defined using parallel step and block	Defined using parallel directive
Agent definition	Defined using node step and block	Defined using agent directive
Environment variables	Defined using env map at the top of the script	Defined using environment directive
Post-build actions	Defined using post section	Defined using post directive
Flow control	Uses traditional if-else statements and loops	Uses a declarative when directive for flow control
Error handling	Uses try-catch-finally statements for error handling	Uses catchError and error directives for error handling
Shared libraries support	Supported	Supported