kubernetes/vendor/github.com/coredns/corefile-migration/migration/migrate.go

// Deprecated returns a list of deprecation notifications affecting the given Corefile.  Notifications are returned for
// any deprecated, removed, or ignored plugins/directives present in the Corefile.  Notifications are also returned for
// any new default plugins that would be added in a migration.
func Deprecated(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string) ([]Notice, error) { … }

// Unsupported returns a list notifications of plugins/options that are not handled supported by this migration tool,
// but may still be valid in CoreDNS.
func Unsupported(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string) ([]Notice, error) { … }

func getStatus(fromCoreDNSVersion, toCoreDNSVersion, corefileStr, status string) ([]Notice, error) { … }

// Migrate returns the Corefile converted to toCoreDNSVersion, or an error if it cannot.  This function only accepts
// a forward migration, where the destination version is => the start version.
// If deprecations is true, deprecated plugins/options will be migrated as soon as they are deprecated.
// If deprecations is false, deprecated plugins/options will be migrated only once they become removed or ignored.
func Migrate(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string, deprecations bool) (string, error) { … }

// MigrateDown returns the Corefile converted to toCoreDNSVersion, or an error if it cannot. This function only accepts
// a downward migration, where the destination version is <= the start version.
func MigrateDown(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string) (string, error) { … }

// Default returns true if the Corefile is the default for a given version of Kubernetes.
// Or, if k8sVersion is empty, Default returns true if the Corefile is the default for any version of Kubernetes.
func Default(k8sVersion, corefileStr string) bool { … }

// Released returns true if dockerImageSHA matches any released image of CoreDNS.
func Released(dockerImageSHA string) bool { … }

// VersionFromSHA returns the version string matching the dockerImageSHA.
func VersionFromSHA(dockerImageSHA string) (string, error) { … }

// ValidVersions returns a list of all versions defined
func ValidVersions() []string { … }

func ValidUpMigration(fromCoreDNSVersion, toCoreDNSVersion string) error { … }

func validateVersion(fromCoreDNSVersion string) error { … }

func validDownMigration(fromCoreDNSVersion, toCoreDNSVersion string) error { … }

func matchOption(oName string, p plugin) (*option, bool) { … }