Fix for Jenkins slowness when Running in AWS EC2 instance | Jenkins Very Slow Upon Starting EC2 Instance after Stopping

Let's say that you have configured Jenkins in AWS EC2 instance and you are using AWS free tier and you are NOT using Elastic IP, so when ever you start EC2 instance after stopping, you would have noticed Jenkins UI is taking a lot of time to come up. You try to access any page in Jenkins, it will be really slow.

What is the root cause of the issue?

Because EC2 configured in AWS free tier account would have new IP after every restart, Jenkins was trying to use old IP address when you are trying to start Jenkins. Due to this issue, Jenkins will be very slow.

Pre-requisites:

• Jenkins is setup in AWS cloud using free-tier account.

There are two ways you can fix this issue:

First option using command line

Make changes in the xml file by logging into EC2 instance through command line using Git bash or any SSH tool.

Connect to Jenkins EC2 instance using Git bash or iTerm:

Navigate to Jenkins installation directory:

cd /var/lib/jenkins/

Modify jenkins.model.JenkinsLocationConfiguration.xml file by executing below command:

sudo nano jenkins.model.JenkinsLocationConfiguration.xml

Make sure you provide Jenkins current URL in below location and restart Jenkins.

sudo service jenkins restart

Now try accessing Jenkins through UI, it will be really performing well.

Second option us using Jenkins UI

Change public URL under Manage Jenkins->System

Change Jenkins URL to current Jenkins URL:

Click on Apply-> Save.

that's it. You will notice Jenkins is performing well now.

Watch steps in YouTube channel: 

How to setup Jenkins on Ubuntu using Ansible Role | Setup Java, Jenkins, Maven on Ubuntu EC2 using Ansible Role

Here below are the Ansible Roles for installing Java, Jenkins, Maven on Ubuntu EC2 instance using Ansible. You need to install Java first (first link below) and then do the steps in the second link for installing Jenkins, third link for installing Maven.

Click here if you would like to create a new Ubuntu EC2 instance using Ansible Playbook.

You can watch this lab on YouTube:

Pre-requisites:
Setup Ansible on your EC2 instance.

Java 11 Playbook
https://www.coachdevops.com/2024/02/ansible-role-for-java-11-installation.html

Jenkins Playbook
https://www.coachdevops.com/2024/02/install-jenkins-using-ansible-role-on.html

Maven Playbook
https://www.coachdevops.com/2024/02/install-maven-using-ansible-role-on.html

Install Jenkins on Ubuntu 22.0.4 | Setup Jenkins on Linux instance | How to setup Jenkins in Ubuntu EC2 instance using Java 17?

Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines.

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 22.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Pre-requisites:

• port 8080 opened in firewall rule to access Jenkins
• Connect to EC2 instance using git bash or iTerm

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 17

sudo apt install openjdk-17-jdk -y

Verify Java Version

java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.

Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system

curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \

  /usr/share/keyrings/jenkins-keyring.asc > /dev/null

Append debian package repo address to the system

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \

  https://pkg.jenkins.io/debian binary/ | sudo tee \

  /etc/apt/sources.list.d/jenkins.list > /dev/null

Update Ubuntu package

sudo apt update

Install Jenkins

sudo apt install jenkins -y

The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to AWS console. Click on EC2, click on running instances link. Select the checkbox of EC2 you are installing Java and Jenkins. Click on Action. Copy the value from step 4 that says --> Connect to your instance using its Public DNS:

Now go to browser. enter public dns name or public IP address with port no 8080.

http://EC2_public_dns_name:8080

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)

Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Copy the password and paste in the browser.

Then click on install suggested plug-ins. 

Also create user name and password.

enter everything as admin. at least user name as admin password as admin

Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:

That's it. You have setup Jenkins successfully 😊Please watch the steps in our YouTube channel:

How to trigger a Jenkins job from another Jenkins job | Jenkins job Integrating another Jenkins Job | Jenkins Pipeline job triggering another Jenkins Job

Jenkins job can be triggered so many different ways. This article provides steps to trigger a Jenkins job from another Jenkins job. 

Pre-requisites:

• Jenkins up and running

Scenario #1(post build) - How to trigger a Jenkins job from another Free style Job?

1. Login to Jenkins instance.
2. Open your any existing freestyle build job.
3. Click on Configure

4. Go to post build action

5. Add post-build action --> click on Build other projects

6. Select job name(projects)  that you want to trigger by typing the name of the job and also check trigger only if build is stable

7. Save the job. 
8. Build job now, once the current job is built, it will trigger the next job immediately.
Check the console output of the current job, you will see id would trigger second job 

9. Go to the secondJob
Check console output. You will see the second job got triggered by first build job.

Scenario #2 (pre-build) - How to trigger a Jenkins job from another Free style Job?

1. Open your freestyle build job.
2. Click on Configure

3. Click on Build triggers

4. Check build other projects are built.

    

Select source job name which will be built first and then once the build is stable, it will be trigger this job. And also check trigger only if build is stable.

5. Save the job. 

6. Run the first job. once that job is successful, and then it will trigger this job.

Scenario #3 - How to trigger any Jenkins job from a pipeline Job:

pipeline {

    agent any

    stages {

        stage('Trigger Another Job') {

            steps {

                    build job: 'mySecondJob', wait: false

            }

        }

    }

}

Watch Steps in YouTube channel: 

Install Jenkins on Ubuntu 22.0.4 in Azure VM | Setup Jenkins on Azure Linux instance | How to setup Jenkins in Ubuntu Virtual Machine running in Azure Cloud?

Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines.

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 22.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Pre-requistes:

• Azure Virtual machine is setup and running in Azure Cloud
• Make sure 8080 port is opened in Networking-->Add inbound port role

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 11

sudo apt install default-jdk -y

 

Once install java, enter the below command

Verify Java Version

java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.

Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system

curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \

  /usr/share/keyrings/jenkins-keyring.asc > /dev/null

Append debian package repo address to the system

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \

  https://pkg.jenkins.io/debian binary/ | sudo tee \

  /etc/apt/sources.list.d/jenkins.list > /dev/null

Update Ubuntu package

sudo apt update

Install Jenkins

sudo apt install jenkins -y

The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to Azure Portal console. Click on Jenkins VM, Copy the public IP address.

 

Now go to browser. enter public IP address with port no 8080.

http://AzureVM_public_IP:8080

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)

Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Copy the password and paste in the browser.

Then click on install suggested plug-ins. 

Also create user name and password.

enter everything as admin. at least user name as admin password as admin

Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:

That's it. You have setup Jenkins successfully. 

Please watch the steps in our YouTube channel:    

How to Integrate Artifactory with Jenkins | Upload Artifacts from Jenkins to Artifactory | Artifactory and Jenkins Integration

 How to Integrate Artifactory with Jenkins?

You can install plug-in called Artifactory plug-in to integrate Artifactory with Jenkins. Let us see how to integrate Jenkins with Artifactory and able to upload any binary file such as War/Ear/Jar/Exe/DLLs from Jenkins.

Pre-requisites:

• Artifactory is already setup and running
• Create a regular artifactory admin (not default admin) user
• Jenkins setup and running
• Install Artifactory plugin in Jenkins.

            go to Jenkins, Manage Jenkins, Click on Available plug-ins, type Artifactory. Click on Artifactory             and click install without restart

• Configure Maven in Jenkins

Make sure Maven 3 is also configured under Manage Jenkins--> Global Tool configuration
Enter Name as Maven3
/usr/share/maven as MAVEN_HOME

Configure Artifactory in Jenkins:
1. Go to Manage Jenkins, Click on configure system. Look for JFrog section, click on Add JFrog Platform instance

2. Enter some name and Artifactory url like given below. Enter admin user name as ciadmin and admin password of ciadmin user you have configured.

You should get the message like below:

3. Once you configured Artifactory in Jenkins, let us integrate from our Jenkins job.

How to Integrate from Jenkins Job

1. Create a new free style job in Jenkins

2. Provide your repo details to check out the project you want to build

3. Go under Build environment
Select Maven 3 - Artifactory integration check box
and click on refresh Repositories and choose repos as mentioned below:

 4.Click on Add Build step and choose Invoke Artifactory Maven 3

5. Enter value as below, MyWebApp/pom.xml as root POM
and goal as install

6. Now click on Build, Jenkins should build using Maven and upload WAR file into Artifactory.

7. Login to Artifactory, Click on Artifactory --> Artifacts

That's it folks!

Please watch the steps in details in my YouTube channel: