verdaccio/wiki/uplinks.md

Uplinks

An upnlink is a link with an external registry that provides acccess to external packages.

uplinks:
  npmjs:
   url: https://registry.npmjs.org/
  server2:
    url: http://mirror.local.net/
    timeout: 100ms
  server3:
    url: http://mirror2.local.net:9000/
  baduplink:
    url: http://localhost:55666/

Configuration

You can define mutiple uplinks and each of them must have an unique name (key). They can have two properties:

Property	Type	Required	Example	Support	Description	Default
url	string	Yes	https://registry.npmjs.org/	all	The registry url
timeout	string	No	100ms	all	set new timeout for the request	30s
maxage	string	No	10m	all	limit maximun failure request	2m
fail_timeout	string	No	10m	all	defines max time when a request becomes a failure	5m
max_fails	number	No	2	all	limit maximun failure request	2
cache	boolean	No	[true,false]	>= 2.1	avoid cache tarballs	true

You Must know

• Uplinks must be registries compatible with the npm endpoints. Eg: verdaccio, sinopia@1.4.0, npmjs registry, yarn registry and more.
• Setting cache to false will help to save space in your hard drive.
• Exceed with multiple uplinks might slow down the lookup of your packages due for each request a npm client does, verdaccio does 1 call for each uplink.
• The (timeout, maxage and fail_timeout) format follow the NGINX measurement units