Kubebuilder project with a component config - could not decode file into runtime.Object

[tomasfabian]

I tried to add a custom config for a Kubernetes operator with a kubebuilder ComponentConfig, but I received the bellow mentioned error:

ERROR setup unable to load the config file {"error": "could not decode file into runtime.Object"}

I set the value of configFile to config/manager/controller_manager_config.yaml, because by default it is an empty string:

	var configFile string
	flag.StringVar(&configFile, "config", "config/manager/controller_manager_config.yaml",
		"The controller will load its initial configuration from this file. "+
			"Omit this flag to use the default configuration values. "+
			"Command-line flags override configuration from this file.")

	var err error
	var options ctrl.Options
	ctrlConfig := v1alpha1.ProjectConfig{}

	if configFile != "" {
		options = ctrl.Options{Scheme: scheme}

		c := ctrl.ConfigFile().AtPath(configFile).OfKind(&ctrlConfig)
		options, err = options.AndFrom(c)

		if err != nil {
			setupLog.Error(err, "unable to load the config file")
			os.Exit(1)
		}
	}

I'm not pasting all the changes I did because I also tried to run the example from kubebuilder's repository with the same result.

When I try to load the options without the OfKind the options are loaded correctly:

c := ctrl.ConfigFile().AtPath(configFile) //.OfKind(&ctrlConfig)
options, err = options.AndFrom(c)

Is it a bug in one of the packages or is my configFile set improperly, because that's the only thing I changed in the example project?
The full list of used packages is available here:

require (
	k8s.io/apimachinery v0.23.5 // for `kubebuilder alpha config-gen`
	sigs.k8s.io/controller-runtime v0.11.2
	sigs.k8s.io/controller-tools v0.8.0 // for `kubebuilder alpha config-gen`
	sigs.k8s.io/kustomize/kyaml v0.13.6 // for `kubebuilder alpha config-gen`
	sigs.k8s.io/yaml v1.3.0
)

projectconfig_types.go:

package v1alpha1

import (
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	cfg "sigs.k8s.io/controller-runtime/pkg/config/v1alpha1"
)

// +kubebuilder:object:root=true

// ProjectConfig is the Schema for the projectconfigs API
type ProjectConfig struct {
	metav1.TypeMeta `json:",inline"`

	// ControllerManagerConfigurationSpec returns the configurations for controllers
	cfg.ControllerManagerConfigurationSpec `json:",inline"`

	ClusterName string `json:"clusterName,omitempty"`
}

func init() {
	SchemeBuilder.Register(&ProjectConfig{})
}

Thanks.

[tomasfabian]

I received an answer to this issue in Stackoverflow. It looks like that there is a bug in the sample controller_manager_config.yaml manifest.

[camilamacedo86]

Closing since it is answered.