Faster images download
The images registry is normally a single web app which is not scalable, and several gigabyte images can take a long time to be downloaded. In our cluster we're running the UBER Kraken - a peer-to-peer layer that caches images layers on cluster nodes and provides significantly improved download speed.
Currently it's set up to serve the images from the following registries:
|docker hub (hub.docker.io) official images||library|
|docker hub (hub.docker.io) user images|
If you need some other image cached, let us know in Matrix.
The way to use kraken is to specify the image as
localhost:30081/prefix/<your_image>, for example
localhost:30081/prp/jupyter:latest. For user-uploaded docker hub images use the user name as prefix. Nodes will download and cache your image, and next time the download to another node will be much faster.