openstack/diskimage-builder

History

Jenkins 41c7dd2e56 Merge "Add tests for building *-minimal images"		2016-09-01 05:44:03 +00:00
..
environment.d	Split the debootstrap functions into an element	2015-04-26 18:04:59 +00:00
pre-install.d	Split the debootstrap functions into an element	2015-04-26 18:04:59 +00:00
test-elements/build-succeeds	Add tests for building *-minimal images	2016-08-22 16:53:32 +00:00
element-deps	Split the debootstrap functions into an element	2015-04-26 18:04:59 +00:00
element-provides	Add minimal ubuntu and centos base elements	2014-12-11 13:27:36 -08:00
README.rst	Explain difference between two envvars	2016-08-25 10:07:29 +08:00

README.rst

ubuntu-minimal

Note: The ubuntu element is likely what you want unless you really know you want this one for some reason. The ubuntu element gets a lot more testing coverage and use.

Create a minimal image based on Ubuntu. We default to trusty but DIB_RELEASE is mapped to any series of Ubuntu.

If necessary, a custom apt keyring and debootstrap script can be supplied to the debootstrap command via DIB_APT_KEYRING and DIB_DEBIAN_DEBOOTSTRAP_SCRIPT respectively. Both options require the use of absolute rather than relative paths.

Use of this element will also require the tool 'debootstrap' to be available on your system. It should be available on Ubuntu, Debian, and Fedora.

The DIB_OFFLINE or more specific DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE variables can be set to prefer the use of a pre-cached root filesystem tarball.

The DIB_DEBOOTSTRAP_EXTRA_ARGS environment variable may be used to pass extra arguments to the debootstrap command used to create the base filesystem image. If --keyring is is used in DIB_DEBOOTSTRAP_EXTRA_ARGS, it will override DIB_APT_KEYRING if that is used as well.

For further information about DIB_DEBIAN_DEBOOTSTRAP_SCRIPT, DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE and DIB_DEBOOTSTRAP_EXTRA_ARGS please consult "README.rst" of the debootstrap element.