How to render helm template yaml file using kubectl command

General Discussions
1

Hi,

I am trying to deploy helm charts to AWS EKS cluster using Flux cd. Having an issue with helm template yaml files.

Example: configMap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
name: {{ include “sample-api.fullname” . | indent 2 }}-env
{{- with .Values.envVariables }}
data:
{{- toYaml . | nindent 2 }}
{{- end }}

I’m testing it locally with command “kubectl apply -k sample-api/templates”

getting this error
error parsing analytics-api/templates/env-configmap.yml: error converting YAML to JSON: yaml: line 3: did not find expected key

Its not able to render the template., its complaing about {{}} statemets in the yaml file. However I tried hardcoded values instead of {{ }} statements that works fine.

my sample-api/templates folder has Kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
-configmap.yml

In my case I wanted to auto deploy helm charts to EKS using flux.
Any suggestions please.

Thanks!

2

kubectl cannot render helm templates, helm can do that first then they can be applied with helm.

3

Got it. Locally, I can run with helm command successfully.

But how do we deploy the helm templates with {{ }} values in EKS with flux
Again, I tried with hardcoded values instead of {{ }} and can deploy successfully.

I have my helm repository added to flux , here is the configuration file


apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
kind: Kustomization
metadata:
  name: fleet-helm
  namespace: flux-system
spec:
  interval: 10m0s
  path: ./charts/src/analytics/sample-api/templates
  prune: true
  sourceRef:
    kind: GitRepository
    name: fleet-helm

I set path: ./charts/src/analytics/sample-api/templates to templates dir where I have yaml files with {{ }}. Throws below error when I check
flux get all

False False failed to decode Kubernetes YAML from /tmp/kustomization-2772309989/charts/src/analytics/analytics-api/templates/sample-api.yaml: MalformedYAMLError: yaml: line 3: did not find expected key.