4d4417c9a6
diskimage-builder usually provides defaults that work out of the box. One default that does not work outside of x86 land is Ubuntu distro mirror url. Considering there are only two valid default options, we can automatically choose a better default. This patch changes behavior only for architectures known to be using http://ports.ubuntu.com/ubuntu-ports. All others still would use http://archive.ubuntu.com/ubuntu as default. It provides some guarantee that we do not introduce a regression. Change-Id: If95a64bac0c88f30736da4bae7f1fdce126c0bf6
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 xenial 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.