Helm chart 1.4.0 fails templating when rbac.rules or rbac.clusterRules is empty array #4778
Description
Component(s)
No response
What's wrong?
In the latest version of the Alloy Helm chart (1.4.0), when either rbac.rules or rbac.clusterRules is set as an empty array with [], Helm template fails with the following error:
Error: YAML parse error on alloy/templates/rbac.yaml: error converting YAML to JSON: yaml: line 14: did not find expected key
Use --debug flag to render out invalid YAMLSteps to reproduce
Run the following command(s) when using Helm chart version 1.4.0:
-
If repo is not already installed for helm locally:
helm repo add grafana https://grafana.github.io/helm-charts
-
Create
values.yamlfile with one or both ofrbac.rulesandrbac.clusterRulesset as[]. -
Build the chart
# Get chart tar file helm pull grafana/alloy --version 1.4.0 # Build chart to 'output-file.yaml' helm template alloy "alloy-1.4.0.tgz" \ --namespace "monitoring" \ --values=values.yaml \ >output-file.yaml
System information
Arch Linux 6.17.5-1-cachyos
Software version
Grafana Alloy Helm Chart 1.4.0
Helm version v3.19.0
Configuration
# values.yaml
rbac:
create: true
rules: []
clusterRules: []
Logs
install.go:225: 2025-11-05 20:54:43.97915119 +0800 AWST m=+0.016979119 [debug] Original chart version: ""
install.go:242: 2025-11-05 20:54:43.97917433 +0800 AWST m=+0.017002249 [debug] CHART PATH: /tmp/tmp.ImrXxbbqCo/alloy-1.4.0.tgz
Error: YAML parse error on alloy/templates/rbac.yaml: error converting YAML to JSON: yaml: line 14: did not find expected key
helm.go:92: 2025-11-05 20:54:43.9825483 +0800 AWST m=+0.020376229 [debug] error converting YAML to JSON: yaml: line 14: did not find expected key
YAML parse error on alloy/templates/rbac.yaml
helm.sh/helm/v3/pkg/releaseutil.(*manifestFile).sort
/build/helm/src/helm/pkg/releaseutil/manifest_sorter.go:152
helm.sh/helm/v3/pkg/releaseutil.SortManifests
/build/helm/src/helm/pkg/releaseutil/manifest_sorter.go:104
helm.sh/helm/v3/pkg/action.(*Configuration).renderResources
/build/helm/src/helm/pkg/action/action.go:172
helm.sh/helm/v3/pkg/action.(*Install).RunWithContext
/build/helm/src/helm/pkg/action/install.go:317
main.runInstall
/build/helm/src/helm/cmd/helm/install.go:317
main.newTemplateCmd.func2
/build/helm/src/helm/cmd/helm/template.go:95
github.com/spf13/cobra.(*Command).execute
/build/helm/src/helm/vendor/github.com/spf13/cobra/command.go:1015
github.com/spf13/cobra.(*Command).ExecuteC
/build/helm/src/helm/vendor/github.com/spf13/cobra/command.go:1148
github.com/spf13/cobra.(*Command).Execute
/build/helm/src/helm/vendor/github.com/spf13/cobra/command.go:1071
main.main
/build/helm/src/helm/cmd/helm/helm.go:91
runtime.main
/usr/lib/go/src/runtime/proc.go:285
runtime.goexit
/usr/lib/go/src/runtime/asm_amd64.s:1693
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