Kubernetes agents in Jenkins - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Kubernetes agent in Jenkins?

A Kubernetes agent in Jenkins is a temporary worker pod created on demand in a Kubernetes cluster to run Jenkins jobs. It helps Jenkins scale by running builds inside containers.

intermediate

How does Jenkins create Kubernetes agents?

Jenkins uses the Kubernetes plugin to create agents by launching pods with specific container images and configurations defined in pod templates.

beginner

Why use Kubernetes agents instead of static Jenkins agents?

Kubernetes agents are dynamic and created only when needed, saving resources and allowing Jenkins to scale automatically. Static agents run all the time and can waste resources.

intermediate

What is a pod template in Jenkins Kubernetes plugin?

A pod template defines the configuration for the Kubernetes pod Jenkins will create as an agent. It includes container images, environment variables, volumes, and commands.

intermediate

How does Jenkins communicate with Kubernetes to manage agents?

Jenkins uses the Kubernetes API to create, monitor, and delete pods that act as agents. It authenticates using credentials like service accounts or tokens.

What does a Kubernetes agent in Jenkins typically run inside?

A A Jenkins master node

B A virtual machine

C A Kubernetes pod

D A physical server

Kubernetes agents run inside pods created dynamically in the Kubernetes cluster.

Which Jenkins plugin is used to create Kubernetes agents?

A Pipeline plugin

B Kubernetes plugin

C Docker plugin

D Git plugin

The Kubernetes plugin allows Jenkins to create agents as pods in Kubernetes.

What is the main benefit of using Kubernetes agents in Jenkins?

A Manual agent management

B Permanent build environment

C Faster Jenkins startup

D Automatic scaling and resource efficiency

Kubernetes agents are created on demand, allowing Jenkins to scale and use resources efficiently.

What does a pod template specify in Jenkins Kubernetes agents?

A Container images and pod settings

B Jenkins master configuration

C Build scripts

D User permissions

Pod templates define how the Kubernetes pod agent is configured, including container images.

How does Jenkins authenticate to Kubernetes to manage agents?

A Using service account tokens or credentials

B Using SSH keys

C Using FTP credentials

D Using database passwords

Jenkins uses Kubernetes credentials like service account tokens to communicate securely with the cluster.

Explain how Jenkins uses Kubernetes agents to run build jobs.

Think about how Jenkins scales builds using Kubernetes pods.

Describe what a pod template is and why it is important for Kubernetes agents in Jenkins.

Consider what Jenkins needs to know to create a pod for a build.