Backwards compatibility with former ERR log level.

NewGRPCLogger creates a grpclog.LoggerV2 that will output to the supplied logger with Severity/Verbosity level appropriate for the given config.

Setup logging from Config, and return an hclog Logger.

ValidateLogLevel verifies that a new log level is valid.

Config is used to set up logging.

GatedWriter is an io.Writer implementation that buffers all of its data into an internal buffer until it is told to let data through.

GRPCLogger wrapps a hclog.Logger and implements the grpclog.LoggerV2 interface allowing gRPC servers to log to the standard Consul logger.

LogFile is used to setup a file based logger that also performs log rotation.

SyslogWrapper is used to cleanup log messages before writing them to a Syslogger.