遍历地图列表的 Golang 模板(helm) [英] Golang template (helm) iterating over a list of maps

问题描述

我正在使用 helm 生成 kubernetes yaml.

I'm using helm to generate kubernetes yamls.

我的 values.yaml 看起来像这样:

My values.yaml looks like this:

...
jobs:
  - nme: job1
    command: [sh, -c, "/app/deployment/start.sh job1"]
    activeDeadlineSeconds: 600
  - name: job2
    command: [sh, -c, "/app/deployment/start.sh job2"]
    activeDeadlineSeconds: 600
...

templates/jobs.yaml

{{ range $i, $job := .Values.jobs -}}
apiVersion: batch/v1
kind: Job
metadata:
  name: {{ template "name" . }}-{{ $job.name }}
  labels:
    chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
spec:
  activeDeadlineSeconds: {{ $job.activeDeadlineSeconds }}
  template:
    metadata:
      labels:
        app: {{ template "name" . }}-{{ $job.name }}
    spec:
      containers:
      - name: {{ .Chart.Name }}
        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
        imagePullPolicy: {{ .Values.image.pullPolicy }}
        command: {{ $job.command }}
        env:
{{ toYaml .Values.service.env | indent 10 }}
        ports:
        - containerPort: {{ .Values.service.internalPort }}
{{- end }}

Helm 因此错误而失败:

Helm is failing with this error:

Error: UPGRADE FAILED: render error in "app1/templates/jobs.yaml": template: app1/templates/_helpers.tpl:6:18: executing "name" at <.Chart.Name>: can't evaluate field Name in type interface {}

当我查看 _helpers.tpl 时:

When I look at _helpers.tpl:

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

如果我在 jobs.yaml 中删除范围循环和对 $job 的引用，_helpers.tpl name 模板可以正常工作.当我在循环中添加时，它失败了.

If I remove the range loop and references to $job in my jobs.yaml, the _helpers.tpl name template works fine. When I add in the loop, it fails.

似乎在循环中，包含 .Chart 和 .Values 范围的所有点 . 管道都被重新分配给别的东西.

It seems like within the loop, all dot . pipeline, which contains the scope for .Chart and .Values, is reassigned to something else.

我做错了什么?

推荐答案

在循环内部，. 的值被设置为当前元素，你必须使用 $.Chart.名称以访问您的数据.

Inside the loop the value of the . is set to the current element and you have to use $.Chart.Name to access your data.

我问了一个类似的问题，我认为答案https://stackoverflow.com/a/44734585/8131948也会回答你的问题.

I asked a similar question and I think the answer https://stackoverflow.com/a/44734585/8131948 will answer your question too.

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