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From "Mei Wan (JIRA)" <>
Subject [jira] [Commented] (MESOS-2971) Implement OverlayFS based provisioner backend
Date Thu, 27 Aug 2015 20:55:45 GMT


Mei Wan commented on MESOS-2971:

I've implemented the logic for overlayfs and posted it on review board here (
I mounted the overlay filesystem with multiple lower layer images, which means an upperdir
and workdir are not necessary. It also means this is mounted as read-only. I tested it manually
by creating random files and running a master, slave, and executor with my own executorinfo.

> Implement OverlayFS based provisioner backend
> ---------------------------------------------
>                 Key: MESOS-2971
>                 URL:
>             Project: Mesos
>          Issue Type: Improvement
>            Reporter: Timothy Chen
>            Assignee: Mei Wan
>              Labels: mesosphere
> 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.

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