Add documentation to clarify the ContentType behavior

Signed-off-by: FillZpp <[email protected]>

Author: FillZpp

alias.go

@@ -110,6 +110,9 @@ var (
 	NewWebhookManagedBy = builder.WebhookManagedBy
 
 	// NewManager returns a new Manager for creating Controllers.
+	// Note that if ContentType in the given config is not set, "application/vnd.kubernetes.protobuf"
+	// will be used for all built-in resources of Kubernetes, and "application/json" is for other types
+	// including all CRD resources.
 	NewManager = manager.New
 
 	// CreateOrUpdate creates or updates the given object obj in the Kubernetes

pkg/manager/manager.go

@@ -390,6 +390,9 @@ type LeaderElectionRunnable interface {
 }
 
 // New returns a new Manager for creating Controllers.
+// Note that if ContentType in the given config is not set, "application/vnd.kubernetes.protobuf"
+// will be used for all built-in resources of Kubernetes, and "application/json" is for other types
+// including all CRD resources.
 func New(config *rest.Config, options Options) (Manager, error) {
 	// Set default values for options fields
 	options = setOptionsDefaults(options)