DevOps Classroom Series – 08/May/2020

Jenkins Terms/Concepts

• Project: Configuration of the activities user wants to perform as part of CI/CD
• Job: Jenkins Projects were also referred as jobs earlier
• Build: Jenkins Project/Job when executed
• Workspace: Directory in which Jenkins Jobs/Project is executed
• Jenkins Home Directory: Home directory in which every configuration of Jenkins Servers are placed.
• Jenkins User: Linux user which Jenkins execute the jobs as

Useful Images

FreeStyle Project Creation

• Basic Creation
• Observing Jenkins Home Directory:
• Execute Project
  • Whenever a Jenkins Project is executed it is called as Build and it will have build number. The activities configured in Jenkins Job/Project will be executed as Jenkins user
  • Jenkins Project/Job when executed creates a directory (if not present ) which is called as workspace

How Jenkins executes?

• When the Jenkins Job is executed

  • For Jenkins Job a Build is Created and Executed with unique number on Build Executor
  • The activities in the Jenkins Job configured are executed as a Jenkins User

• Jenkins Jobs failing as

  • command not found: Means the software is not installed on the machine where jenkins jobs are executing
  • Permissions Issue: Ensure you provide Jenkins User Necessary Permissions to execute Jobs

• Setting up no password option for jenkins user

  • Become Root User
  • Execute visudo and add the following line “`jenkins ALL=(ALL:ALL) NOPASSWD:ALL“
  • Restart Jenkins