Kubernetes - 如何定义使用 yaml 中的文件构建的 ConfigMap?

问题描述

目前我正在通过执行以下命令从文件 config.json 创建一个 configmap:

At present I am creating a configmap from the file config.json by executing:

kubectl create configmap jksconfig --from-file=config.json

我希望将 ConfigMap 作为部署的一部分创建并尝试这样做:

I would want the ConfigMap to be created as part of the deployment and tried to do this:

apiVersion: v1
kind: ConfigMap
metadata:
  name: jksconfig
data:
  config.json: |-
    {{ .Files.Get "config.json" | indent 4 }}

但似乎不起作用.什么应该进入 configmap.yaml 以便创建相同的 configmap?

But doesn't seem to work. What should be going into configmap.yaml so that the same configmap is created?

---更新---

当我进行 helm install 试运行时:

when I do a helm install dry run:

# Source: mychartv2/templates/jks-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: jksconfig
data:
  config.json: |

注意:我使用 minikube 作为我的 kubernetes 集群

Note: I am using minikube as my kubernetes cluster

推荐答案

你的 config.json 文件应该在你的 mychart/ 目录中，而不是在 mychart 中/模板

Your config.json file should be inside your mychart/ directory, not inside mychart/templates

图表模板指南

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ .Release.Name }}-configmap
data:
  config.json: |-
{{ .Files.Get "config.json" | indent 4}}

config.json

{
    "val": "key"
}

helm install --dry-run --debug mychart

[debug] Created tunnel using local port: '52091'

[debug] SERVER: "127.0.0.1:52091"

...

NAME:   dining-saola
REVISION: 1
RELEASED: Fri Nov 23 15:06:17 2018
CHART: mychart-0.1.0
USER-SUPPLIED VALUES:
{}

...

---
# Source: mychart/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: dining-saola-configmap
data:
  config.json: |-
    {
        "val": "key"
    }

但我希望从 values.yaml 获取 config.json 文件中的值.这可能吗?

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ .Release.Name }}-configmap
data:
  config.json: |-
    {
{{- range $key, $val := .Values.json }}
{{ $key | quote | indent 6}}: {{ $val | quote }}
{{- end}}
    }

values.yaml

json:
  key1: val1
  key2: val2
  key3: val3

helm install --dry-run --debug mychart

# Source: mychart/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: mangy-hare-configmap
data:
  config.json: |-
    {
      "key1": "val1"
      "key2": "val2"
      "key3": "val3"
    }

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