kubernetes/vendor/github.com/sirupsen/logrus/writer.go

// Writer at INFO level. See WriterLevel for details.
func (logger *Logger) Writer() *io.PipeWriter { … }

// WriterLevel returns an io.Writer that can be used to write arbitrary text to
// the logger at the given log level. Each line written to the writer will be
// printed in the usual way using formatters and hooks. The writer is part of an
// io.Pipe and it is the callers responsibility to close the writer when done.
// This can be used to override the standard library logger easily.
func (logger *Logger) WriterLevel(level Level) *io.PipeWriter { … }

// Writer returns an io.Writer that writes to the logger at the info log level
func (entry *Entry) Writer() *io.PipeWriter { … }

// WriterLevel returns an io.Writer that writes to the logger at the given log level
func (entry *Entry) WriterLevel(level Level) *io.PipeWriter { … }

// writerScanner scans the input from the reader and writes it to the logger
func (entry *Entry) writerScanner(reader *io.PipeReader, printFunc func(args ...interface{ … }

// WriterFinalizer is a finalizer function that closes then given writer when it is garbage collected
func writerFinalizer(writer *io.PipeWriter) { … }