templates/_helpers.tpl文件

helm在安装应用包的时候，会执行template下的文件。在此例中，_helplers.tpl文件定义了判断和设置变量值的逻辑。

  • tpl后缀名并非强制，实际使用场景中也可以使用yaml文件。

  • tpl文件本身也是yaml格式的，文本模板格式使用Golang的文本模板语言编写。

{{/* vim: set filetype=mustache: */}}

{{/*

Expand the name of the chart.

*/}}

{{- define "name" -}}

{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}

{{- end -}}

{{/*

Create a default fully qualified app name.

We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).

If release name contains chart name it will be used as a full name.

*/}}

{{- define "fullName" -}}

{{- if .Values.fullnameOverride -}}

{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}

{{- else -}}

{{- $name := default .Chart.Name .Values.nameOverride -}}

{{- if contains $name .Release.Name -}}

{{- .Release.Name | trunc 63 | trimSuffix "-" -}}

{{- else -}}

{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}

{{- end -}}

{{- end -}}

{{- end -}}

{{/*

Create chart name and version as used by the chart label.

*/}}

{{- define "chartName" -}}

{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}

{{- end -}}