Values.yaml file

Q: How deeply does Acing the Certified Kubernetes Administrator Exam, Second Edition cover values.yaml file?

Explains YAML values, Go template substitution, installation, and verification, but does not detail Helm rendering internals.

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

A values file is a YAML configuration file containing parameters that Helm substitutes into chart templates.

A values.yaml file is a YAML configuration file that supplies parameters for Helm chart templates. Helm substitutes those values into templated Kubernetes manifests, allowing chart configuration without editing the templates. section 5.3.1

Use a values file to configure and install a chart:

Create values.yaml with the chart-specific parameters. section 5.3.1
Pass it during installation with helm install and the --values values.yaml flag. section 5.3.1
Verify the resulting release with Helm output such as STATUS: deployed or helm ls. section 5.3.1

MetalLB address-pool configuration

A values.yaml file can define an address pool using protocol layer2 and the range 172.18.255.200-172.18.255.250. Install it with helm install metallb metallb/metallb --values values.yaml. section 5.3.1

cccc
address-pools:
 - name: default
   protocol: layer2
   addresses:
   - 172.18.255.200-172.18.255.250

Inspect a concrete values.yaml listing for MetalLB address-pool configuration. 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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Machine Learning Platform EngineeringA Helm values file is a configuration file containing values that customize templates in a Helm chart.
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Data Pipelines with Apache Airflow, Second EditionA Helm values file is a configuration file containing values that parameterize a Helm chart deployment.

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Related concepts

Helm chartconfigures · A Helm chart is a versioned package of templated Kubernetes resource definitions, configuration values, and metadata for deploying an application or service.
Kubernetes object templateconfigures · A Kubernetes object template is a parameterized YAML definition of a Kubernetes object with customizable properties.
Airflow deploymentconfigures · An Airflow deployment is an installed and configured operational instance of the Apache Airflow platform.
Helmconfigures · Helm is a Kubernetes package manager and templating tool that defines, packages, installs, upgrades, and manages applications through charts.
YAMLkind of · YAML is a human-readable data-serialization standard for representing structured data, including mappings, sequences, and scalar values.

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.