[MESOS-2971] Implement OverlayFS based provisioner backend

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.28.0
• Labels: mesosphere twitter unified-containerizer-mvp
• Epic Link: Unified Container
• Sprint: Mesosphere Sprint 29
• Story Points: 5
• Assignee: Shuai Lin
• Reporter: Timothy Chen
• Shepherd: Jie Yu
• Created: 01/Jul/15 00:36
• Updated: 26/Nov/18 12:22
• Resolved: 26/Nov/18 12:22

Description

Part of the image provisioning process is to call a backend to create a root filesystem based on the image on disk layout.
The problem with the copy backend is that it's both waste of IO and space, and bind only can deal with one layer.
Overlayfs backend allows us to utilize the filesystem to merge multiple filesystems into one efficiently.

Issue Links

• is blocked by: MESOS-4707 Add fs:supported() function for detecting whether a file system is supported
• relates to: MESOS-4672 Implement aufs based provisioner backend.