verdaccio/website/docs/logger.md

id	title
logger	Logger

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

''

logs:
  # console output
  - { type: stdout, format: pretty, level: http }
  # file output
  - { type: file, path: verdaccio.log, level: info }
  # Rotating log stream. Options are passed directly to bunyan. See: https://github.com/trentm/node-bunyan#stream-type-rotating-file
  - {
      type: rotating-file,
      format: json,
      path: /path/to/log.jsonl,
      level: http,
      options: { period: 1d },
    }

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