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My question is similar to this question Helm Charts with multiple lists in multiple values files however, the change is that the value structure is different and I need a way to merge those

the chart has the following

 env:
   {{- toYaml .Values.env | nindent 12 }}

the default values.yaml file has the following

env:
  - name: Test
    value: "Value"

The custom.yaml file has the values defined as

env:
  - name: Test2
    value: "Value2"

Based on this post Helm Charts with multiple lists in multiple values files, I am able to merge these two into a single by modifying the chart to

 env:
    {{- range $key, $value := .Values.abc.env }}
    - name: {{ $key }}
      value: {{ $value | quote }}
    {{- end }}

However, this doesn't work if the default value file has a key/value that has a different format.

My requirement is that I need to insert the worker node IP into all the pod as an environment name HOST_IP. Any additional env variables in the custom.yaml must be added to this.

env:
  - name: HOST_IP
    valueFrom:
      fieldRef:
        apiVersion: v1
        fieldPath: status.hostIP

So, the final yaml must have

env:
  - name: HOST_IP
    valueFrom:
      fieldRef:
        apiVersion: v1
        fieldPath: status.hostIP
  - name: Test2
    value: "Value2"

The issue here is that when these are merged, it provides an incorrect syntax.

How can I have these two formats merged into a single so that I can add them to the template? Is there a way to merge these in helm?

zeroweb
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1 Answers1

0

You can try this

env:
  {{- range .Values.env }}
  - name: {{ .name }}
    {{- with .value }}
    value: {{ . | quote }}
    {{- end }}
    {{- with .valueFrom }}
    valueFrom:
      {{ . | toYaml | nindent 6 }}
    {{- end }}
  {{- end }}
emjay_010
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