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On Thu, Apr 16, 2020 at 10:11:47AM +0100, Lee Yarwood wrote:
> Understood, going off on a slight tangent here but has virt-builder ever
> been considered for building these CI images? I appreciate there's a
> huge amount of logic built up in the dib elements at this point but I've
> always assumed you could inject that into a virt-builder run somehow.

Not seriously -- for a start I'm yet to find a tool that can build
*everything* we're interested in; including centos, fedora, debian,
suse and gentoo; despite [1] being impressive it still lacks coverage
of some of them.

As you say, most of the logic is in the various elements doing
customisation.  If anything the trend is to *decrease* the logic there
and move it into Zuul base jobs -- there is a lot of history, and the
amazing templating and inheritance that we have in our jobs now was
not always available, leading to some of the choices we made at the
time to do various things to the images we make available which we
would not do now.

There is some interest in making dib builds bootstrap themselves from
containers; see [2] for a WIP change.  This avoids some of the issues
with requiring the host to have tools to build guest chroots.

-i

[1] http://builder.libguestfs.org/index.asc
[2] https://review.opendev.org/#/c/700083/