NewFileStore returns a concrete implementation of a Store that is based on storing the cert/key pairs in a single file per pair on disk in the designated directory.

NewKubeletClientCertificateManager sets up a certificate manager without a client that can be used to sign new certificates (or rotate).

NewKubeletServerCertificateManager creates a certificate manager for the kubelet when retrieving a server certificate or returns an error.

NewManager returns a new certificate manager.

Config is the set of configuration parameters available for a new Manager.

Manager maintains and updates the certificates in use by this certificate manager.

Store is responsible for getting and updating the current certificate.

NoCertKeyError indicates there is no cert/key currently available.