关于 helm yaml 语法

Question

the configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ include "test.fullname" . }}-config-map
data:
  brokerConf: |
    {{ .Values.configmap }}

the below values.yaml is right.

configmap: |
  key=values

but the values.yaml is wrong

configmap: |
  key=values
  key2=values2

the helm template core content is

apiVersion: v1
kind: ConfigMap
metadata:
  name: test-config-map
data:
  brokerConf: |
    key=values
key2=values2

the error

Error: YAML parse error on test/templates/config-map.yaml: error converting YAML to JSON: yaml: line 9: could not find expected ':'
helm.go:84: [debug] error converting YAML to JSON: yaml: line 9: could not find expected ':'
YAML parse error on v5-proxy/templates/config-map.yaml
helm.sh/helm/v3/pkg/releaseutil.(*manifestFile).sort
    helm.sh/helm/v3/pkg/releaseutil/manifest_sorter.go:146
helm.sh/helm/v3/pkg/releaseutil.SortManifests
    helm.sh/helm/v3/pkg/releaseutil/manifest_sorter.go:106
helm.sh/helm/v3/pkg/action.(*Configuration).renderResources
    helm.sh/helm/v3/pkg/action/action.go:165

how to fix it?

Answer 1

You may update the configmap as below:

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-map
data:
  brokerConf:
    {{ .Values.configmap| indent 4|trim }}

The error is caused because the 2nd line in data.brokerConf is not indented properly. Something like below, where key2=values2 is an invalid statement in yaml world, the correct is key2: values2 .

configmap: 
  key=values
key2=values2

To fix it we have to use indent , but it will do indent the first line additionally. To address that , trim is used.