Function createConfigMapVolumeMounts

controllers/object_controls.go:3461–3489

createConfigMapVolumeMounts creates a VolumeMount for each key in the ConfigMap. Use subPath to ensure original contents at destinationDir are not overwritten.

(n ClusterPolicyController, configMapName string, destinationDir string)

// in the ConfigMap. Use subPath to ensure original contents
// at destinationDir are not overwritten.
func createConfigMapVolumeMounts(n ClusterPolicyController, configMapName string, destinationDir string) ([]corev1.VolumeMount, []corev1.KeyToPath, error) {
	ctx := n.ctx
	// get the ConfigMap
	cm := &corev1.ConfigMap{}
	opts := client.ObjectKey{Namespace: n.operatorNamespace, Name: configMapName}
	err := n.client.Get(ctx, opts, cm)
	if err != nil {
		return nil, nil, fmt.Errorf("ERROR: could not get ConfigMap %s from client: %v", configMapName, err)
	}

	// create one volume mount per file in the ConfigMap and use subPath
	var filenames []string
	for filename := range cm.Data {
		filenames = append(filenames, filename)
	}
	// sort so volume mounts are added to spec in deterministic order
	sort.Strings(filenames)
	var itemsToInclude []corev1.KeyToPath
	var volumeMounts []corev1.VolumeMount
	for _, filename := range filenames {
		volumeMounts = append(volumeMounts,
			corev1.VolumeMount{Name: configMapName, ReadOnly: true, MountPath: filepath.Join(destinationDir, filename), SubPath: filename})
		itemsToInclude = append(itemsToInclude, corev1.KeyToPath{
			Key:  filename,
			Path: filename,
		})
	}
	return volumeMounts, itemsToInclude, nil
}

func createConfigMapVolume(configMapName string, itemsToInclude []corev1.KeyToPath) corev1.Volume {
	volumeSource := corev1.VolumeSource{