NewMySQLBackend constructs a MySQL backend using the given API client and server address and credential for accessing mysql database.

NewMySQLLock helper function.

You were unable to update that you are the new leader in the DB.

ErrLockHeld is returned when another vault instance already has a lock held for the given key.

Error to thow if inbetween getting the lock and checking the ID of it we lost it.

ErrUnlockFailed.

This is the GlobalLockID for checking if the lock we got is still the current lock.

MySQLBackend is a physical backend that stores data within MySQL database.

MySQLHALock is a MySQL Lock implementation for the HABackend.

MySQLLock provides an easy way to grab and release mysql locks using the built in GET_LOCK function.