24-28 August 2020
US/Pacific timezone

Overlayfs new features

24 Aug 2020, 08:10
30m
Microconference1/Virtual-Room (LPC 2020)

Microconference1/Virtual-Room

LPC 2020

150
Containers and Checkpoint/Restore MC Containers and Checkpoint/Restore MC

Speaker

Amir Goldstein (CTERA Networks)

Description

Containers are by far the biggest use case for overlayfs.
Yet, there seems to be very little cross talk between overlayfs and containers mailing lists.

This talk is going to present some opt-in overlayfs features that were added in recent years (redirect_dir, index, nfs_export, xino, metacopy).

Most of those features have not been enabled by most container runtimes, because of various reasons:

  • Requires more development in userspace (image migration)
  • Unrelated runtime bugs (mount leaks)
  • Mismatch for containers needs
  • Lack of promotion

This talk is about giving the opportunity to container runtime developers to better understand what they may get from overlayfs.

This talk is not about containers wish list from overlayfs, because userns overlayfs mount needs 45 minutes on its own...

I agree to abide by the anti-harassment policy I agree

Primary author

Amir Goldstein (CTERA Networks)

Presentation Materials