kubernetes-helm - 在 Go 模板中使用 include inside range (helm)

Question

我有一个使用 range 多次渲染的模板迭代，我可以访问变量外部变量，例如 $.Release.Name没有问题。但是，当我包含模板时，我无法让它工作:

{{ range $key, $val := $.Values.resources }}
      ...
      annotations:
        checksum/config: {{ include (print $.Template.BasePath "/secrets.yaml") . | sha256sum }}
{{ end }}

而在 secrets.yaml :

apiVersion: "v1"
kind: "Secret"
metadata:
  name: {{ $.Release.Name }}-secrets

我收到此错误:

Error: render error in "botfront-project/templates/deployment.yaml": template: [filename] :19:28: executing [filename] at <include (print $.Template.BasePath "/secrets.yaml") .>: error calling include: template: .../secrets.yaml:4:19: executing ".../secrets.yaml" at <$.Release.Name>: nil pointer evaluating interface {}.Name

如何访问包含模板中的变量？

Answer 1

TL; 博士;
只需更换 .与 $使用全局范围而不是您创建的本地范围。
例子:

{{- include "my-chart.labels" $ | nindent 4 }}

说明
根据文档， https://helm.sh/docs/chart_template_guide/control_structures/#modifying-scope-using-with :

we can use $ for accessing the object Release.Name from the parentscope.$ is mapped to the root scope when template execution beginsand it does not change during template execution

与 range我们改变循环内的范围。确实， {{- include "my-chart.labels" . | nindent 4 }}将调用当前作用域 . .
所以如果你在 helm doc 中深入研究这个“范围”的东西，你最终会发现这部分: https://helm.sh/docs/chart_template_guide/variables/
通过这个例子:

{{- range .Values.tlsSecrets }}
apiVersion: v1
kind: Secret
metadata:
  name: {{ .name }}
  labels:
    # Many helm templates would use `.` below, but that will not work,
    # however `$` will work here
    app.kubernetes.io/name: {{ template "fullname" $ }}
    # I cannot reference .Chart.Name, but I can do $.Chart.Name
    helm.sh/chart: "{{ $.Chart.Name }}-{{ $.Chart.Version }}"
    app.kubernetes.io/instance: "{{ $.Release.Name }}"
    # Value from appVersion in Chart.yaml
    app.kubernetes.io/version: "{{ $.Chart.AppVersion }}"
    app.kubernetes.io/managed-by: "{{ $.Release.Service }}"
type: kubernetes.io/tls
data:
  tls.crt: {{ .certificate }}
  tls.key: {{ .key }}
---
{{- end }}