Run the below commands to install Java and Jenkins Install Java
sudo apt update sudo apt install openjdk-11-jre Verify Java is Installed
java -version Now, you can proceed with installing Jenkins
**curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee
/usr/share/keyrings/jenkins-keyring.asc > /dev/null
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
sudo apt-get update sudo apt-get install jenkins
**Note: ** By default, Jenkins will not be accessible to the external world due to the inbound traffic restriction by AWS. Open port 8080 in the inbound traffic rules as show below.
EC2 > Instances > Click on In the bottom tabs -> Click on Security Security groups Add inbound traffic rules as shown in the image (you can just allow TCP 8080 as well, in my case, I allowed All traffic).
Login to Jenkins using the below URL: http://:8080 [You can get the ec2-instance-public-ip-address from your AWS EC2 console page]
Note: If you are not interested in allowing All Traffic to your EC2 instance 1. Delete the inbound traffic rule for your instance 2. Edit the inbound traffic rule to only allow custom TCP port 8080
After you login to Jenkins, - Run the command to copy the Jenkins Admin Password - sudo cat /var/lib/jenkins/secrets/initialAdminPassword - Enter the Administrator password
Install the Docker Pipeline plugin in Jenkins: Log in to Jenkins. Go to Manage Jenkins > Manage Plugins. In the Available tab, search for "Docker Pipeline". Select the plugin and click the Install button. Restart Jenkins after the plugin is installed.
Docker Slave Configuration Run the below command to Install Docker
sudo apt update sudo apt install docker.io
Grant Jenkins user and Ubuntu user permission to docker deamon.
sudo su - usermod -aG docker jenkins usermod -aG docker ubuntu systemctl restart docker
Once you are done with the above steps, it is better to restart Jenkins.
http://:8080/restart
The docker agent configuration is now successful.