helm 图表错误无法评估类型接口 {} 中的字段值

问题描述 投票:0回答:4

我知道这是某种与语法/yaml 结构相关的错误,但该消息是如此神秘,我不知道问题是什么:

Error: render error in "mychart/templates/ingress.yaml": template: mychart/templates/ingress.yaml:35:37: executing "mychart/templates/ingress.yaml" at <.Values.network.appP...>: can't evaluate field Values in type interface {}

这是我的values.yaml:

network:
  appPort: 4141

这是 ingress.yaml:

{{- $fullName := include "mychart.fullname" . -}}
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: {{ $fullName }}
  labels:
    app.kubernetes.io/name: {{ include "mychart.name" . }}
    helm.sh/chart: {{ include "mychart.chart" . }}
    app.kubernetes.io/instance: {{ .Release.Name }}
    app.kubernetes.io/managed-by: {{ .Release.Service }}
  {{- with .Values.ingress.annotations }}
  annotations:
    {{- toYaml . | nindent 4 }}
  {{- end }}
spec:
{{- if .Values.ingress.tls }}
  tls:
  {{- range .Values.ingress.tls }}
    - hosts:
      {{- range .hosts }}
        - {{ . | quote }}
      {{- end }}
      secretName: {{ .secretName }}
  {{- end }}
{{- end }}
  rules:
  {{- range .Values.ingress.hosts }}
    - host: {{ .host | quote }}
      http:
        paths:
        {{- range .paths }}
          - path: {{ . }}
            backend:
              serviceName: {{ $fullName }}
              servicePort: {{ .Values.network.appPort }}
        {{- end }}
  {{- end }}

为什么

{{ .Values.network.appPort }}
不起作用?我在其他地方使用了具有相同结构的值

kubernetes kubernetes-helm
4个回答
52
投票

范围块中

.
指的是执行时间内的当前值。您可以使用
.
来访问范围块中的根数据对象,而不是声明顶级变量,而不是
$

示例:

  {{- range $host := .Values.ingress.hosts }}
    - host: {{ $host }}
      http:
        paths:
        - path: /
          pathType: Prefix
          backend:
            service:
              name: frontend
              port:
                number: {{ $.Values.frontend.service.port }}
  {{- end}}

45
投票

这不只是范围问题吗?

尝试以下操作

{{- $fullName := include "mychart.fullname" . -}}
{{- $networkAppPort  := .Values.network.appPort -}}
...
.... omitted code
...
      http:
        paths:
        {{- range .paths }}
          - path: {{ . }}
            backend:
              serviceName: {{ $fullName }}
              servicePort: {{ $networkAppPort }}
        {{- end }}
  {{- end }}

7
投票

我使用 helm3,当我运行

helm template my-chart
时,我有相同的错误消息。就我而言,我在
values.yaml
,

中定义错误

错误的配置(在我的

values.yaml
中缺少
path
下的
paths
):

ingress:
  enabled: true
  annotations:
     kubernetes.io/ingress.class: "nginx"
     nginx.ingress.kubernetes.io/rewrite-target: /$2
     nginx.ingress.kubernetes.io/ssl-redirect: "false"
     nginx.ingress.kubernetes.io/use-regex: "true"

  hosts:
    - host: "dev"
      paths:
      - /dev(/|$)(.*)
  tls: []

像这样更正入口定义,它可以工作

ingress:
  enabled: true
  annotations:
     kubernetes.io/ingress.class: "nginx"
     nginx.ingress.kubernetes.io/rewrite-target: /$2
     nginx.ingress.kubernetes.io/ssl-redirect: "false"
     nginx.ingress.kubernetes.io/use-regex: "true"

  hosts:
    - host:
      paths:
      - path: "/dev(/|$)(.*)"
  tls: []

我的入口模板,

ingress.yaml
,它是通过 helm 自动生成的

{{- if .Values.ingress.enabled -}}
{{- $fullName := include "bsb-lookup.fullname" . -}}
{{- $svcPort := .Values.service.port -}}
{{- if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
apiVersion: networking.k8s.io/v1beta1
{{- else -}}
apiVersion: extensions/v1beta1
{{- end }}
kind: Ingress
metadata:
  name: {{ $fullName }}
  labels:
    {{- include "bsb-lookup.labels" . | nindent 4 }}
  {{- with .Values.ingress.annotations }}
  annotations:
    {{- toYaml . | nindent 4 }}
  {{- end }}
spec:
  {{- if .Values.ingress.tls }}
  tls:
    {{- range .Values.ingress.tls }}
    - hosts:
        {{- range .hosts }}
        - {{ . | quote }}
        {{- end }}
      secretName: {{ .secretName }}
    {{- end }}
  {{- end }}
  rules:
    {{- range .Values.ingress.hosts }}
    - host: {{ .host | quote }}
      http:
        paths:
          {{- range .paths }}
          - path: {{ .path }}
            backend:
              serviceName: {{ $fullName }}
              servicePort: {{ $svcPort }}
          {{- end }}
    {{- end }}
  {{- end }}

1
投票

对于 YAML,还需要具有任何可选值的直接父级。

就像您尝试在 helm 构建期间在某些 yaml 中检查“a.b.c”一样,它会给出类似的错误。默认值.yaml 中至少需要有 a.b。

通过详细信息解决 - https://github.com/helm/helm/issues/5435

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