kubernetes/cmd/kube-apiserver/app/options/validation.go

// TODO: Longer term we should read this from some config store, rather than a flag.
// validateClusterIPFlags is expected to be called after Complete()
func validateClusterIPFlags(options Extra) []error { … }

func validateMaxCIDRRange(cidr net.IPNet, maxCIDRBits int, cidrFlag string) error { … }

func validateServiceNodePort(options Extra) []error { … }

func validatePublicIPServiceClusterIPRangeIPFamilies(extra Extra, generic genericoptions.ServerRunOptions) []error { … }

// Validate checks ServerRunOptions and return a slice of found errs.
func (s CompletedOptions) Validate() []error { … }