kubernetes/cmd/kubelet/app/options/globalflags.go

// AddGlobalFlags explicitly registers flags that libraries (glog, verflag, etc.) register
// against the global flagsets from "flag" and "github.com/spf13/pflag".
// We do this in order to prevent unwanted flags from leaking into the Kubelet's flagset.
func AddGlobalFlags(fs *pflag.FlagSet) { … }

// normalize replaces underscores with hyphens
// we should always use hyphens instead of underscores when registering kubelet flags
func normalize(s string) string { … }

// register adds a flag to local that targets the Value associated with the Flag named globalName in global
func register(global *flag.FlagSet, local *pflag.FlagSet, globalName string) { … }

// registerDeprecated registers the flag with register, and then marks it deprecated
func registerDeprecated(global *flag.FlagSet, local *pflag.FlagSet, globalName, deprecated string) { … }

// addCredentialProviderFlags adds flags from k8s.io/kubernetes/pkg/credentialprovider
func addCredentialProviderFlags(fs *pflag.FlagSet) { … }