Jenkins Distributed Architecture Setup

Provision VM

• Provision 2 Ec2 instance on AWS. One instance will be used for Java Agent and another for ssh connection
• While luanching instance ensure to define key

Configuring Jenkins

• Navigate to ManageJenkins--> Security--> Agent
• Enable TCP port for inbound agents
• Select Fixed, and give port value as 50000
• Install plugin Docker and Docker Pipeline

Adding Node as Java Agent

• Naivate to ManageJenkins--> Node
• Choose Type as Permanent Agent and click Create
• Follow instruction and Save
• • Define label of your choice like ssh
• • Remote Dir as /home/ubuntu
• • Lanuch Method - Connecting by controller
• On Node page, click on Agent name, it will display some commands. We will need to run these command on Agent terminal

Connecting Slave with Master

• Update package
• Install Java
• Run command displayed on master node page
• keep the process running, so not terminate process

Adding Node using SSH

• Naivate to ManageJenkins--> Node
• Choose Type as Permanent Agent and click Create
• Follow instruction and Save
• • Define label of your choice like ssh
• • Remote Dir as /home/ubuntu
• • Lanuch Method - via ssh
• • Add host and credentials, private key for slave node
• • Select 'Non verifying' in Host key verification
• On Node page, check the status, you can relauch and check logs

Running Docker container

• Install docker on a slave machine. Follow instruction from below url
• https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04
• Relaunch Instance

Docker Hub Account

• Open hub.docker.com
• Signup/login on hub.docker.com

Jenkins steps

• Install Docker Pipeline plugin in Jenkins
• Create a credentials "dockerhub" (username and password) for hub.docker.com

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# Usages

• Launch pipeline using Jenkinsfile for basic Java application on a agent with Java already installed
• Launch pipeline using Jenkinsfile-docker for using agent as docker with image
• Launch pipeline using Jenkinsfile-dockerfile for using agent as docker with dockerfile kept in the repo along with Jenkinsfile