Agent directive in Jenkins - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the agent directive in a Jenkins pipeline?

The agent directive tells Jenkins where to run the pipeline or a specific stage. It can specify a node, a label, or run on any available agent.

beginner

How do you specify that a Jenkins pipeline should run on any available agent?

Use agent any in the pipeline script to tell Jenkins to run the pipeline on any available agent.

intermediate

What does agent none mean in a Jenkins pipeline?

agent none means the pipeline itself does not run on any agent by default. You must specify agents for individual stages if needed.

beginner

How can you specify a specific label for the agent in Jenkins pipeline?

Use agent { label 'label-name' } to run the pipeline or stage on an agent with that label.

intermediate

Can the agent directive be used inside individual stages in Jenkins pipelines?

Yes, you can specify agent inside stages to run that stage on a different agent than the rest of the pipeline.

What does agent any do in a Jenkins pipeline?

A Runs the pipeline without any agent

B Runs the pipeline on the master node only

C Runs the pipeline on any available agent

D Runs the pipeline on a specific label

agent any tells Jenkins to run the pipeline on any available agent.

Which agent directive means no default agent is assigned to the pipeline?

A agent any

B agent docker

C agent label 'linux'

D agent none

agent none means the pipeline does not run on any agent by default.

How do you specify an agent with a label in Jenkins pipeline?

A agent { label 'my-label' }

B agent any

C agent none

D agent docker

Use agent { label 'my-label' } to run on an agent with that label.

Can you use different agents for different stages in a Jenkins pipeline?

A No, the agent is global for the whole pipeline

B Yes, by specifying <code>agent</code> inside each stage

C Only if you use <code>agent none</code>

D Only if you use scripted pipelines

You can specify agent inside stages to run them on different agents.

What happens if you omit the agent directive in a declarative Jenkins pipeline?

A Pipeline fails to run

B Pipeline runs on any available agent by default

C Pipeline runs on the master node

D Pipeline runs without an agent

In declarative pipelines, agent is required unless you use agent none.

Explain the role of the agent directive in Jenkins pipelines and how it affects where your code runs.

Think about how Jenkins knows where to run your pipeline or stages.

Describe how you can run different stages of a Jenkins pipeline on different agents using the agent directive.

Consider a pipeline that needs different environments for build and test.