Terraform helm_release fails on set labels - amazon-web-services

Question

I wish to set labels inside a Helm chart using the Terraform helm_release resource with a helpers function.
When using the chart values there are no issues, as seen here:
values.yaml
mylabels:
name: "foo"
type: "boo"
_helpers.tpl
{{- define "aws.labels" -}}
{{- range $k, $v := .Values.mylabels }}
{{ $k }}: {{ $v | quote }}
{{- end -}}
{{- end -}}
deployment.yaml
metadata:
labels:
{{- include "aws.labels" . | trim | nindent 4 }}
But when values are passed in from the helm_release resource it fails.
set {
name = "mylabels"
value = yamlencode(var.aws_tags)
}
The output values for the above is:
+ set {
+ name = "mylabels"
+ value = <<-EOT
"Environment": "123"
"Owner": "xyz"
EOT
}
Which generates error:
│ Error: template: aws-efs-csi-driver/templates/controller-deployment.yaml:9:6: executing "aws-efs-csi-driver/templates/controller-deployment.yaml" at <include "aws.tags" .>: error calling include: template: aws-efs-csi-driver/templates/_helpers.tpl:68:27: executing "aws.tags" at <.Values.mylabels>: range can't iterate over
│ "Environment": "123"
│ "Owner": "xyz"
Any ideas or pointers would be greatly appreciated :-)
Solution
Thank you #jordanm that worked :~)

Answer 1

When using set in this way, it's the same as --set on the helm cli. You can't provide a yaml value that includes multiple values and must set each individually.
set {
name = "mylabels.Environment"
value = var.aws_tags["Environment"]
}
set {
name = "mylabels.Owner"
value = var.aws_tags["Owner"]
}
You may also be able the dynamic feature of terraform to iterate over your aws_tags variable:
dynamic "set" {
for_each = var.aws_tags
content {
name = "mylabels.${set.key}"
value = set.value
}
}