The new name is Analytics-Cluster , the URL is still the same [1]

We changed the name because some of the tasks logged in this project went beyond the scope of the Refinery code repository and involved actual work on the cluster.

More on the project is on Wikitech [2]

[1] https://phabricator.wikimedia.org/project/view/655/
[2] https://wikitech.wikimedia.org/wiki/Analytics/Cluster/Overview