stream-file-archive

Easy log rotation for Node.js

Supports:

• Output your logs to time-rotated log files.
• Optionally gzip the logs once they are no longer current
• Optionally maintain a symlink to the currently active log file
• Native Streams2 (0.10.x+) with backwards compatibility

Can directly plug into smart-tee, e.g.:

node foo.js 2>&1 | smart-tee --s stdout --s stream-file-archive --path logs/app-%Y-%m-%d.log

Usage:

var rotator = require("stream-file-archive")({
  path: "logs/app-%Y-%m-%d.log",  // Write logs rotated by the day
  symlink: "logs/current.log",    // Maintain a symlink called current.log
  compress: true,                 // Gzip old log files
})

my_logger_thingy.pipe(rotator)

Options

path

A string file path with any of the below options to define rotation schedule:

e.g. logs/mylog-%Y-%m-%d.log would result in logs like logs/mylog-2013-06-01.log

• %Y 4-digit year e.g. 2013
• %y 2-digit year e.g. 13
• %m month (01..12)
• %d day of month (01..31)
• %F iso8601 date portion (e.g. 2012-09-24)
• %H hour (00..23)
• %M minute (00..59)
• %S second (00..61)
• %T iso8601 time portion to the second (e.g.: 15:12:47)

See strftime documentation for all specifiers.

symlink

A path to a symlink that will be maintained to point at the current log file.

compress

Boolean value, whether to gzip the files once they aren't being written to.

Events

Emits a done event when the source stream has finished and all file stream work is complete.

NOTES:

Currently only timestamps files in UTC timezone. Pull requests welcome!

LICENSE

MIT