verdaccio/website/versioned_docs/version-5.x/uplinks.md

id	title
uplinks	Uplinks

An uplink is a link with an external registry that provides access to external packages.

Usage

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 the following properties:

Property	Type	Required	Example	Support	Description	Default
url	string	Yes	https://registry.npmjs.org/	all	The registry url	npmjs
ca	string	No	~./ssl/client.crt'	all	SSL path certificate	No default
timeout	string	No	100ms	all	set new timeout for the request	30s
maxage	string	No	10m	all	the time threshold to the cache is valid	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	cache all remote tarballs in storage	true
auth	list	No	see below	>= 2.5	assigns the header 'Authorization' more info	disabled
headers	list	No	authorization: "Bearer SecretJWToken=="	all	list of custom headers for the uplink	disabled
strict_ssl	boolean	No	[true,false]	>= 3.0	If true, requires SSL certificates be valid.	true
agent_options	object	No	maxSockets: 10	>= 4.0.2	options for the HTTP or HTTPS Agent responsible for managing uplink connection persistence and reuse more info	No default

Auth property

The auth property allows you to use an auth token with an uplink. Using the default environment variable:

uplinks:
  private:
    url: https://private-registry.domain.com/registry
    auth:
      type: bearer
      token_env: true # by defaults points to the environment variable `NPM_TOKEN`

or via a specified custom environment variable:

uplinks:
  private:
    url: https://private-registry.domain.com/registry
    auth:
      type: bearer
      token_env: FOO_TOKEN # override the default `NPM_TOKEN` by a custom one

token_env: FOO_TOKEN internally will use process.env['FOO_TOKEN']

or by directly specifying a token oh the configuration file (not recommended by security corcerns):

uplinks:
  private:
    url: https://private-registry.domain.com/registry
    auth:
      type: bearer
      token: "token"

Note: token has priority over token_env

You Must know

• Uplinks must be registries compatible with the npm endpoints. Eg: verdaccio, sinopia@1.4.0, npmjs registry, yarn registry, JFrog, Nexus and more.
• Setting cache to false will help to save space in your hard drive. This will avoid store tarballs but it will keep metadata in folders.
• Multiple uplinks might slow down the lookup of your packages. For each request an npm client makes, verdaccio makes 1 call to each configured uplink.
• The (timeout, maxage and fail_timeout) format follow the NGINX measurement units
• When using the Helm Chart, you can use secretEnvVars to inject sensitive environment variables, which can be used to configure private uplink auth.