winston-logrotate

winston-logrotate

Overview

Winston's default file transport rotation creates new logs daily, or if the file exceeds a max size, but it does not expunge old logs. This means that an additional module must be used to delete old log files.

winston-logrotate provides a transport with full support for size based rotation, compression and pruning log files.

winston-logrotate uses logrotate-stream under the covers, which is used to perform compression/rotation and winston's common.log to get timestamps, colorization, and log formatting.

Options

Field	Required	Description
file	yes	The filename of the logfile to write output to.
colorize	no	Boolean flag indicating if we should colorize output.
timestamp	no	Boolean flag indicating if we should prepend output with timestamps (default false). If function is specified, its return value will be used instead of timestamps.
json	no	If true, messages will be logged as JSON (default true).
size	no	The max file size of a log before rotation occurs. Supports 1024, 1k, 1m, 1g. Defaults to 100m
keep	no	The number of rotated log files to keep (including the primary log file). Defaults to 5
compress	no	Optionally compress rotated files with gzip. Defaults to true.

Usage

Require:

require('winston-logrotate');

Create a rotate transport:

var rotateTransport = new winston.transports.Rotate({
        file: '/tmp/my.log', // this path needs to be absolute
        colorize: false,
        timestamp: true,
        json: false,
        size: '100m',
        keep: 5,
        compress: true
});

and add it to default winston logger:

winston.add(rotateTransport)

or create a custom logger using the transport:

var logger = new (winston.Logger)({ transports: [rotateTransport] });