HELM get first element from a helpers template

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                          I have some template inside _helpers.tpl file like this

    {{- define "clusterNodes" }}
    - ip: "192.168.7.10"
      hostnames:
      - "m1"
    - ip: "192.168.7.20"
      hostnames:
      - "w1"
    - ip: "192.168.7.30"
      hostnames:
      - "w2"
    {{- end }}

and I want to fetch hostnames of first element in above for following yaml

    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: nginx2
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: nginx2
      template:
        metadata:
          labels:
            app: nginx2
        spec:
          nodeName: "{{ (index (index $clusterNodes "clusterNodes") 0).hostnames.0 }}"
          containers:
          - name: nginx2
            image: nginx:alpine
            imagePullPolicy: IfNotPresent

so that this entry look like below

    nodeName: m1
                        

Asked by Sollosa (1993 rep)

Jul 6, 2023, 06:47 PM
Last activity: Sep 20, 2023, 07:58 AM

HELM get first element from a helpers template

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