File Systems as a Service

on YouTube ↗36m

" summary

SAP implements a managed volume service for Cloud Foundry that provisions an NFS share per service instance, mounts it into Diego cells via the Docker volume plugin API, and enforces per-share quotas by creating a UID-mapped user and using fuse NFS UID mapping. The broker is a Go-based custom broker that returns a volume_mount JSON with driver and source, while a slightly modified upstream NFSv3 driver performs mounts and a broker callback validates requests. The service works in production but requires high availability to avoid blocking app starts.

AI-written summary · about

" chapters (4)

1. 0:00Introduction and motivation
2. 13:19Volume service architecture
3. 20:28Implementation details and broker setup
4. 32:46Lessons learned and Q&A

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