Use overlayfs when deploying

When deploying, configuration extensions are run against the unpacked
tarball of a system created by a build. If we are to use OSTree to
store systems (rather than tarballs) this will not be possible as the
result of `ostree checkout` would be read-only.

To solve this, we use overlayfs to mount the unpacked tarball
underneath a temporary directory somewhere, and run the configuration
extensions on that mount point. This means that the changes are
made in the temporary directory rather than directly on the tarball.

Change-Id: Iafcb78feaa1d6d37be4f52420c03d5b96d5c81ee

0 files changed, 0 insertions, 0 deletions