Helm Variables: Difference between revisions
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</syntaxhighlight> | </syntaxhighlight> | ||
Variables are less frequently used, as an alternative preferred construct is the [[Helm_Named_Templates|named template]]. | Variables are less frequently used, as an alternative preferred construct is the [[Helm_Named_Templates|named template]]. | ||
Variables are particularly useful in range loops. They can be used on list-like objects to capture both the index and the value: | |||
<syntaxhighlight lang='yaml'> | |||
toppings: |- | |||
{{- range $index, $topping := .Values.pizzaToppings }} | |||
{{ $index }}: {{ $topping }} | |||
{{- end }} | |||
</syntaxhighlight> | |||
This will assign the integer index (0-based) to $index and the value to $topping. | |||
For data structures that have both key and value, range can be used to get both and assign them to variables: | |||
<syntaxhighlight lang='yaml'> | |||
{{- range $key, $val := .Values.favorite }} | |||
{{ $key }}: {{ $val | quote }} | |||
{{- end }} | |||
</syntaxhighlight> | |||
Revision as of 00:59, 8 October 2020
External
Internal
Overview
A variable is a named reference to another object. It is assigned and referred using the $<name> syntax. := is used as assignment operator.
{{- $relname := .Release.Name -}}
...
data:
release: {{ $relname }}
Variables are less frequently used, as an alternative preferred construct is the named template.
Variables are particularly useful in range loops. They can be used on list-like objects to capture both the index and the value:
toppings: |-
{{- range $index, $topping := .Values.pizzaToppings }}
{{ $index }}: {{ $topping }}
{{- end }}
This will assign the integer index (0-based) to $index and the value to $topping. For data structures that have both key and value, range can be used to get both and assign them to variables:
{{- range $key, $val := .Values.favorite }}
{{ $key }}: {{ $val | quote }}
{{- end }}