diskimage-builder/elements/fedora-minimal/README.rst
Ian Wienand 4585955a8b Remove yum chroot caching
Every run we are doing a full tar.gz of the chroot environment that
never gets used.

It's not suitable for CI since we use fresh images each time there.

The cache in general isn't really isn't a very safe thing to have
around, because there's no invalidation procedure and no real way to
make one -- we've no guarantee that a new chroot build even moments
after a previous one wouldn't bring in or different packages, etc (of
course this is *unlikely*, but the longer you go between builds the
worse the problem becomes.  Also, tons of packages get installed after
this not from any cache, so potential speed-up is rather marginal.

Debian turned this off with I58fc485aacacaa17243bf9ce760ed91256d1f182.
However, given the reasons above and it's complete lack of testing, I
don't see this as useful.

If we really want this type of thing, I think we should come up with a
way to use a persistent external yum/dnf cache that yum/dnf keeps in
sync with it's usual invalidation rules.

Change-Id: I66789c35db75c41bc45ea1ad2e26f87456de4e4d
2016-12-20 13:56:46 +11:00

17 lines
688 B
ReStructuredText

==============
fedora-minimal
==============
Create a minimal image based on Fedora.
Use of this element will require 'yum' and 'yum-utils' to be installed on
Ubuntu and Debian. Nothing additional is needed on Fedora or CentOS. The
element will need `python-lzma` everywhere.
Due to a bug in the released version of urlgrabber, on many systems an
installation of urlgrabber from git is required. The git repository
can be found here: http://yum.baseurl.org/gitweb?p=urlgrabber.git;a=summary
This element sets the ``DIB_RELEASE`` var to 'fedora'. The release of
fedora to be installed can be controlled through the ``DIB_RELEASE``
variable, which defaults the latest supported release.