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verdaccio/website/docs/uplinks.md
Sergio Moreno a6b0d63afb
feat: migrate Verdaccio.org to Docusaurus v2 and new design (#2343)
Co-authored-by: Juan Picado <juanpicado19@gmail.com>
2021-07-27 21:52:49 +02:00

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---
id: uplinks
title: "Uplinks"
---
An *uplink* is a link with an external registry that provides access to external packages.
![Uplinks](https://user-images.githubusercontent.com/558752/52976233-fb0e3980-33c8-11e9-8eea-5415e6018144.png)
### Usage {#usage}
```yaml
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 {#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](uplinks.md#auth-property) | >= 2.5 | assigns the header 'Authorization' [more info](http://blog.npmjs.org/post/118393368555/deploying-with-npm-private-modules) | 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](https://nodejs.org/api/http.html#http_class_http_agent) | No default
#### Auth property {#auth-property}
The `auth` property allows you to use an auth token with an uplink. Using the default environment variable:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token_env: true # defaults to `process.env['NPM_TOKEN']`
```
or via a specified environment variable:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token_env: FOO_TOKEN
```
`token_env: FOO_TOKEN `internally will use `process.env['FOO_TOKEN']`
or by directly specifying a token:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token: "token"
```
> Note: `token` has priority over `token_env`
### You Must know {#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](https://github.com/verdaccio/verdaccio/issues/391).
* 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](http://nginx.org/en/docs/syntax.html)