Package slinstance provides functionality for acquiring sqlliveness leases via sessions that have a unique id and expiration.

Package slprovider exposes an implementation of the sqlliveness.Provider interface.

NotStartedError can be returned from calls to the sqlliveness subsystem prior to its being started.

TestingKnobs contains test knobs for sqlliveness system behavior.

Instance represents a SQL tenant server instance and is responsible for maintaining at most once session for this instance and heart beating the current live one if it exists and otherwise creating a new live one.

Provider is a wrapper around the sqlliveness subsystem for external consumption.

Reader abstracts over the state of session records.

Session represents a SQL instance lock with expiration.

StorageReader provides access to Readers which either block or do not block.

SessionID represents an opaque identifier for a session.