Helm: Passing array values through --set

Question

i have a cronjob helm chat, i can define many jobs in values.yaml and cronjob.yaml will provision my jobs. I have faced an issue when setting the image tag id in command line, following command throw no errors but it wont update jobs image tag to new one.

helm upgrade cronjobs cronjobs/ --wait --set job.myservice.image.tag=b70d744

cronjobs will run with old image tag how can i resolve this?

here is my cronjobs.yaml

{{- $chart_name := .Chart.Name }}
{{- $chart_version := .Chart.Version | replace "+" "_" }}
{{- $release_name := .Release.Name }}

{{- range $job := .Values.jobs }}
---
apiVersion: batch/v1beta1
kind: CronJob
metadata:
  namespace: "{{ $job.namespace }}"
  name: "{{ $release_name }}-{{ $job.name }}"
  labels:
    chart: "{{ $chart_name }}-{{ $chart_version }}"
spec:
  concurrencyPolicy: {{ $job.concurrencyPolicy }}
  failedJobsHistoryLimit: {{ $job.failedJobsHistoryLimit }}
  suspend: {{ $job.suspend }}
  jobTemplate:
    spec:
      template:
        metadata:
          labels:
            app: {{ $release_name }}
            cron: {{ $job.name }}
        spec:
          containers:
          - image: "{{ $job.image.repository }}:{{ $job.image.tag }}"
            imagePullPolicy: {{ $job.image.imagePullPolicy }}
            ports:
              - name: http
                containerPort: 80
                protocol: TCP
            name: {{ $job.name }}
            args:
{{ toYaml $job.args | indent 12 }}
            env:
{{ toYaml $job.image.env | indent 12 }}
            volumeMounts:
            - name: nfs
              mountPath: "{{ $job.image.nfslogpath }}"
          restartPolicy: OnFailure
          imagePullSecrets:
            - name: {{ $job.image.secret }}
          volumes:
            - name: nfs
              nfs:
                server: "{{ $job.image.server }}"
                path: "{{ $job.image.nfspath }}"
                readOnly: false
  schedule: {{ $job.schedule | quote }}
  successfulJobsHistoryLimit: {{ $job.successfulJobsHistoryLimit }}
  {{- end }}

here is my values.yaml

jobs:
  - name: myservice
    namespace: default
    image:
      repository: xxx.com/myservice
      tag: fe4544
      pullPolicy: Always
      secret: xxx
      nfslogpath: "/var/logs/"
      nfsserver: "xxx"
      nfspath: "/nfs/xxx/cronjobs/"
      nfsreadonly: false
      env:
    schedule: "*/5 * * * *"
    args:
    failedJobsHistoryLimit: 1
    successfulJobsHistoryLimit: 3
    concurrencyPolicy: Forbid
    suspend: false

  - name: myservice2
    namespace: default
    image:
      repository: xxxx/myservice2
      tag: 1dff39a
      pullPolicy: IfNotPresent
      secret: xxxx
      nfslogpath: "/var/logs/"
      nfsserver: "xxxx"
      nfspath: "/nfs/xxx/cronjobs/"
      nfsreadonly: false
      env:
    schedule: "*/30 * * * *"
    args:
    failedJobsHistoryLimit: 1
    successfulJobsHistoryLimit: 2
    concurrencyPolicy: Forbid
    suspend: false

Answer 1

If you need to pass array values you can use curly braces (unix shell require quotes):

--set test={x,y,z}
--set "test={x,y,z}"

Result YAML:

test:
  - x
  - y
  - z

Source: https://helm.sh/docs/intro/using_helm/#the-format-and-limitations-of---set

EDITED : added double-quotes for unix shell like bash