Agent types (permanent, cloud) in Jenkins - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a permanent agent in Jenkins?

A permanent agent is a Jenkins node that is always available and manually configured. It runs on a fixed machine and stays connected to the Jenkins master unless manually disconnected.

beginner

What defines a cloud agent in Jenkins?

A cloud agent is a temporary Jenkins node created dynamically on cloud infrastructure. It spins up when needed for a job and is destroyed after the job finishes.

intermediate

How does a cloud agent help optimize resources?

Cloud agents only run when jobs need them, so they save resources by not running all the time. This reduces costs and improves scalability.

beginner

Name one key difference between permanent and cloud agents.

Permanent agents are always running and connected, while cloud agents are created and destroyed dynamically based on job demand.

intermediate

Why might a team choose permanent agents over cloud agents?

Teams might choose permanent agents for stable, long-running environments or when cloud infrastructure is not available or too costly.

What happens to a cloud agent after a Jenkins job finishes?

A It disconnects but stays on the machine

B It stays running indefinitely

C It becomes a permanent agent

D It is destroyed to save resources

Cloud agents are temporary and are destroyed after the job completes to optimize resource use.

Which agent type requires manual setup and stays connected to Jenkins?

A Permanent agent

B Dynamic agent

C Ephemeral agent

D Cloud agent

Permanent agents are manually configured and remain connected to Jenkins until manually disconnected.

What is a main benefit of using cloud agents in Jenkins?

A They reduce infrastructure costs by running only when needed

B They provide permanent storage for builds

C They require no network connection

D They run on the Jenkins master machine

Cloud agents spin up on demand and shut down after use, saving infrastructure costs.

Which Jenkins agent type is best for long-running, stable workloads?

A Cloud agent

B Permanent agent

C Temporary agent

D Serverless agent

Permanent agents are suited for stable workloads because they stay connected and ready.

How does Jenkins typically create cloud agents?

A By cloning permanent agents

B Manually by the admin

C Automatically via cloud plugins when jobs start

D By running on the Jenkins master

Jenkins uses cloud plugins to automatically provision cloud agents when jobs require them.

Explain the differences between permanent and cloud agents in Jenkins.

Think about availability and resource management.

Describe a scenario where using a cloud agent is better than a permanent agent.

Consider cost and scalability benefits.