kubernetes/cmd/kubeadm/app/util/config/joinconfiguration.go

// SetJoinDynamicDefaults checks and sets configuration values for the JoinConfiguration object
func SetJoinDynamicDefaults(cfg *kubeadmapi.JoinConfiguration, skipCRIDetect bool) error { … }

// SetJoinControlPlaneDefaults checks and sets configuration values for the JoinControlPlane object
func SetJoinControlPlaneDefaults(cfg *kubeadmapi.JoinControlPlane) error { … }

// LoadOrDefaultJoinConfiguration takes a path to a config file and a versioned configuration that can serve as the default config
// If cfgPath is specified, defaultversionedcfg will always get overridden. Otherwise, the default config (often populated by flags) will be used.
// Then the external, versioned configuration is defaulted and converted to the internal type.
// Right thereafter, the configuration is defaulted again with dynamic values (like IP addresses of a machine, etc)
// Lastly, the internal config is validated and returned.
func LoadOrDefaultJoinConfiguration(cfgPath string, defaultversionedcfg *kubeadmapiv1.JoinConfiguration, opts LoadOrDefaultConfigurationOptions) (*kubeadmapi.JoinConfiguration, error) { … }

// LoadJoinConfigurationFromFile loads versioned JoinConfiguration from file, converts it to internal, defaults and validates it
func LoadJoinConfigurationFromFile(cfgPath string, opts LoadOrDefaultConfigurationOptions) (*kubeadmapi.JoinConfiguration, error) { … }

// documentMapToJoinConfiguration takes a map between GVKs and YAML documents (as returned by SplitYAMLDocuments),
// finds a JoinConfiguration, decodes it, dynamically defaults it and then validates it prior to return.
func documentMapToJoinConfiguration(gvkmap kubeadmapi.DocumentMap, allowDeprecated, allowExperimental, strictErrors, skipCRIDetect bool) (*kubeadmapi.JoinConfiguration, error) { … }

// DefaultedJoinConfiguration takes a versioned JoinConfiguration (usually filled in by command line parameters), defaults it, converts it to internal and validates it
func DefaultedJoinConfiguration(defaultversionedcfg *kubeadmapiv1.JoinConfiguration, opts LoadOrDefaultConfigurationOptions) (*kubeadmapi.JoinConfiguration, error) { … }