help adding item with a list of string into a helm yaml template

[lordigon]

Hi all,
I have a yaml template file like this one

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    control-plane: controller-manager
  name: activemq-artemis-controller-manager
spec:
  replicas: 1
  selector:
    matchLabels:
      control-plane: controller-manager
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate
  template:
    metadata:
      labels:
        control-plane: controller-manager
        name: activemq-artemis-operator
    spec:
      containers:
      - args:
        - --zap-log-level=info
        - --zap-encoder=console
        - --zap-time-encoding=iso8601
        - --leader-elect
        command:
        - /home/activemq-artemis-operator/bin/entrypoint
        env:
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2150
          value: {{ include "test.activemqinitbroker.imageName" . }}:0.2.2
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2160
          value: {{ include "test.activemqinitbroker.imageName" . }}:0.2.4

I would like to add an imagePullsecret item with a list with one value to obtain this yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    control-plane: controller-manager
  name: activemq-artemis-controller-manager
spec:
  replicas: 1
  selector:
    matchLabels:
      control-plane: controller-manager
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate
  template:
    metadata:
      labels:
        control-plane: controller-manager
        name: activemq-artemis-operator
    spec:
      imagePullSecrets:
        - name: "{{ include "test.imagePullSecrets" . }}"
      containers:
      - args:
        - --zap-log-level=info
        - --zap-encoder=console
        - --zap-time-encoding=iso8601
        - --leader-elect
        command:
        - /home/activemq-artemis-operator/bin/entrypoint
        env:
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2150
          value: {{ include "test.activemqinitbroker.imageName" . }}:0.2.2
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2160
          value: {{ include "test.activemqinitbroker.imageName" . }}:0.2.4

I was not able to find an example covering this case but I'm pretty new to yq so I need some help.
Thx.

[mikefarah]

The helm template isn't valid yaml - because of helm template expressions using {{ .. }}. You will need to wrap that in quotes to get a valid yaml file first:

# etc
  template:
    metadata:
      labels:
        control-plane: controller-manager
        name: activemq-artemis-operator
    spec:
      containers:
      - args:
        - --zap-log-level=info
        - --zap-encoder=console
        - --zap-time-encoding=iso8601
        - --leader-elect
        command:
        - /home/activemq-artemis-operator/bin/entrypoint
        env:
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2150
          value: '{{ include "test.activemqinitbroker.imageName" . }}:0.2.2'
        - name: RELATED_IMAGE_ActiveMQ_Artemis_Broker_Init_2160
          value: '{{ include "test.activemqinitbroker.imageName" . }}:0.2.4'

Then you can use yq to add the desired entry in:

yq '.template.spec.imagePullSecrets[0].name = "{{ include \"test.imagePullSecrets\" . }}"' data1.yaml