CernVM-FS powered container hub

Containers became the de-facto standard to package and distribute modern applications their dependencies. The HEP community demonstrates an increasing interest in such technology, with scientists encapsulating analysis workflow code inside a container image. is first validated on small dataset minimal hardware resources then run at scale massive computing capacity provided by grid. typical approach for distributing containers consists of pulling image from remote registry extracting it node where runtime (e.g., Docker, Singularity) runs. This approach, however, does not easily large images thousands nodes. CVMFS has long been used efficient distribution software directory trees global scale. In order extend its optimized caching network utilization containers, recently implemented dedicated ingestion service together integrations. based per-file deduplication, instead per-layer deduplication adopted traditional registries. On client-side, implements on-demand fetching chunks required execution whole