Helm Templates

External

• The Chart Template Developer’s Guide https://helm.sh/docs/chart_template_guide/#the-chart-template-developer-s-guide

Internal

• Helm Concepts

Overview

Templates are files living under a chart's templates/ directory.

Built-in Objects

Built-in Objects

Chart

Exposes all contents of Chart.yaml. An existing field is available as (note leading dot) .Chart.<UpperCasedFirstLetterFieldName>.

Example:

{{ .Chart.Name }}
{{ .Chart.Version }}

Release

Release.Name

Exposes the release name:

{{ .Release.Name }}

Release.Revision

Exposes the release revision:

{{ .Release.Revision }}

Release.Time

Exposes the time of the release:

{{ .Release.Time }}

Release.Namespace

Exposes the namespace to be released info, if the manifest does not override:

{{ .Release.Namespace }}

Release.IsUpgrade

This is set to true if the current operation is an upgrade or rollback.

{{ .Release.IsUpgrade }}

Release.IsInstall

This is set to true if the current operation is an install.

{{ .Release.IsInstall }}

Release.Service

Exposes the releasing service - always Tiller

TODO

Template Comments

# This is a comment

{{- /*
This is another comment
*/ -}}

TODO

• https://helm.sh/docs/chart_template_guide/#the-chart-template-developer-s-guide
• https://helm.sh/docs/chart_best_practices/#templates
• https://helm.sh/docs/developing_charts/#templates-and-values
• https://helm.sh/docs/developing_charts/#know-your-template-functions
• https://helm.sh/docs/developing_charts/#quote-strings-don-t-quote-integers
• https://helm.sh/docs/developing_charts/#using-the-include-function
• https://helm.sh/docs/developing_charts/#using-the-required-function
• https://helm.sh/docs/developing_charts/#using-the-tpl-function
• https://helm.sh/docs/developing_charts/#creating-image-pull-secrets
• https://helm.sh/docs/developing_charts/#automatically-roll-deployments-when-configmaps-or-secrets-change
• https://helm.sh/docs/developing_charts/#tell-tiller-not-to-delete-a-resource
• https://helm.sh/docs/developing_charts/#using-partials-and-template-includes
• https://helm.sh/docs/chart_best_practices/#pods-and-podtemplates
• https://helm.sh/docs/chart_best_practices/#images
• https://helm.sh/docs/chart_best_practices/#imagepullpolicy
• https://helm.sh/docs/chart_best_practices/#podtemplates-should-declare-selectors