verdaccio/docs/website/logger.md

id	title
logger	Logger

As with any web application, Verdaccio has a customisable built-in logger. You can define multiple types of outputs.

# console output
logs: { type: stdout, format: pretty, level: http }

or file output.

# file output
logs: { type: file, path: verdaccio.log, level: info }

Verdaccio 5 does not support rotation file anymore, here more details.

Use SIGUSR2 to notify the application, the log-file was rotated and it needs to reopen it. Note: Rotating log stream is not supported in cluster mode. See here

Configuration

Property	Type	Required	Example	Support	Description
type	string	No	[stdout, file]	all	define the output
path	string	No	verdaccio.log	all	if type is file, define the location of that file
format	string	No	[pretty, pretty-timestamped]	all	output format
level	string	No	[fatal, error, warn, http, info, debug, trace]	all	verbose level