best cloud file storage for k8s

For Kubernetes, the “best” cloud file storage depends on whether you need shared POSIX file storage, high throughput, simple ops, or lowest cost. Here are the top choices by cloud:

Best overall by cloud

• AWS: EFS
  Best default for shared, managed file storage across pods/nodes. Easy with the EFS CSI driver.
• GCP: Filestore
  Good managed NFS option for Kubernetes. Simple and reliable.
• Azure: Azure Files
  Best general-purpose managed SMB/NFS-style file share for AKS.

If you want the simplest Kubernetes-native experience

Use the cloud provider’s managed file storage with the CSI driver:

• AWS EFS CSI
• GCP Filestore CSI
• Azure Files CSI

If you need high performance / specialized workloads

• AWS FSx for Lustre: great for HPC, analytics, ML training
• Azure NetApp Files: very strong performance and enterprise features
• Google Persistent Disk + app-level design: often better than shared file storage if you can avoid NFS

If you want to minimize cost

• Use object storage instead of file storage if your app allows it:
  • AWS S3
  • GCS
  • Azure Blob
• For actual file semantics, pick the cheapest managed NFS option in your cloud, but watch performance and mount limits.

Quick recommendation

• General apps needing shared volumes: EFS / Filestore / Azure Files
• HPC or ML: FSx for Lustre or Azure NetApp Files
• Best architecture if possible: avoid shared file storage and use object storage or block storage per pod

Important K8s note

For Kubernetes, file storage should usually be:

• RWX if multiple pods need the same files
• Backed by a CSI driver
• Used only when you truly need shared filesystem semantics

If you tell me:

1. your cloud provider,
2. workload type, and
3. whether you need RWX or just persistent storage,

I can recommend the best exact option.