Upgrade Nexus servers to 3.20.1

Deploy the Nexus 3 3.20.0 upgrade across our infrastructure.

https://help.sonatype.com/repomanager3/release-notes/2019-release-notes#id-2019ReleaseNotes-RepositoryManager3.20.0

https://issues.sonatype.org/secure/ReleaseNote.jspa?projectId=10001&version=18521

 

Many fix and improvements we're concerned with, including:

New and Noteworthy

Ability to Clean Up by "Never downloaded"

NEXUS-19424 

In past versions of cleanup, you could clean up by Last Downloaded but components with no download date would be ignored. This new function allows the ability to include in Cleanup items that have never been downloaded. In this case, uploaded date will be checked instead. In addition to the ticket, see Cleanup Policies documentation for more information.

R Format Support

NEXUS-9837

Nexus Repository Manager now provides native support for R repositories. R is a language used for statistical analysis and machine learning.

Enhanced npm login for private repository usages

NEXUS-12456 

Added support for "npm login" bearer token authentication to proxied upstream npm private repositories.

npm whoami support 

NEXUS-13433

Added support for "npm whoami".

npm package metadata does not return correct status code sometimes 

NEXUS-21371

Conditional request handling added to npm group repositories to prevent errant 200 status codes from showing as 304s.

General Improvements

Blobstore, UI

• [NEXUS-19811  Offline and misconfigured blob store should be noted in UI

Docker

• [NEXUS-21306 Cannot proxy Docker repository on Bintray

Firewall

• [NEXUS-21672 Group repo with proxy repo member to remote group repo responds 404 when remote group repo responds "403 Requested item is quarantined"

PyPI

• [NEXUS-18117 PyPI ignoring python_requires metadata
• [NEXUS-20705 Index can contain absolute URLs which bypass Nexus Repository Manager

Repository Health Check

• [NEXUS-21589 Repository health check can fail if the same asset exists in more than one repository

REST

• [NEXUS-14233 Support managing Realms via the REST API

Scheduled Tasks, Maven

• [NEXUS-21138 Snapshot remover leaves maven-metadata.xml files deleted for a long time, breaking builds