Helm

Q: How deeply does Acing the Certified Kubernetes Administrator Exam, Second Edition cover Helm?

Explains repositories, charts, templated values, kubeconfig access, installation commands, and release verification.

As explained in Acing the Certified Kubernetes Administrator Exam, Second Edition

Helm is a package manager for installing, configuring, and upgrading applications on Kubernetes.

Helm is a Kubernetes package manager and template engine. It packages related YAML manifests into charts, stores charts in repositories, and installs applications using the cluster selected by kubeconfig. section 5.3.1

A practical Helm workflow is:

Install Helm and verify it with helm version --short; the demonstrated installation reports Helm 3.17. section 5.3.1
Add a chart repository, then inspect available charts with helm repo list and helm search repo. section 5.3.1
Supply configuration through a values file and install a chart with helm install RELEASE CHART --values values.yaml. section 5.3.1
Verify the resulting release with helm ls and check the Kubernetes resources created by the chart. section 5.3.1

Installing MetalLB with custom values

A values.yaml file defines an address pool from 172.18.255.200 through 172.18.255.250. Running helm install metallb metallb/metallb --values values.yaml creates the release and reports STATUS: deployed; helm ls shows revision 1 and chart metallb-0.14.9. section 5.3.1

root@kind-control-plane:/# helm install metallb metallb/metallb --values 
values.yaml
NAME: metallb
LAST DEPLOYED: Thu Jan 23 04:49:11 2025
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
MetalLB is now running in the cluster.

Use the representative Helm installation output to connect the command with release name, namespace, revision, status, and deployment notes. section 5.3.1

How Acing the Certified Kubernetes Administrator Exam, Second Edition covers it

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Also explained in

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Platform Engineering on KubernetesHelm is a package manager for Kubernetes applications that packages, configures, and manages deployments through charts and releases.
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Machine Learning Platform EngineeringHelm is a package manager for defining, installing, upgrading, and managing applications on Kubernetes.

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Related concepts

Kubernetesuses · Kubernetes is an open-source platform for orchestrating and automating the deployment, scaling, and management of containerized workloads across computing clusters.
Helm chartuses · A Helm chart is a versioned package of templated Kubernetes resource definitions, configuration values, and metadata for deploying an application or service.
Kubernetes APIuses · The Kubernetes API is the programmatic interface through which clients and components define, query, modify, and manage Kubernetes resources and cluster state.
Kustomizealternative to · Kustomize is a Kubernetes-native configuration customization tool that composes and transforms resource manifests from reusable bases, overlays, and patches without general-purpose templating.
templating languageuses · A templating language combines predefined templates with supplied data, values, or expressions to generate text or structured output.
templateuses · A template is a reusable structure with fixed elements and variable parts for creating or generating similar content, outputs, or artifacts.

This explainer was generated by Manning's knowledge graph from the text of Acing the Certified Kubernetes Administrator Exam, Second Edition. The section links point to the parts of the book it draws on.