[Pkg-libvirt-maintainers] Bug#775514: No networking running virt-builder scripts after upgrading from 1.26 to 1.28

[Richard W.M. Jones]

I went through this with Adam and there are two bugs:

(1) isc-dhcp-client is not listed in
/usr/lib/x86_64-linux-gnu/guestfs/supermin.d/packages

As a result, dhclient is not loaded into the appliance, and
the dhclient command fails.

I thought this was strange, because upstream we have 'isc-dhcp-client'
listed in packagelist.in, but then I realized that the problem is
really that 'isc-dhcp-client' is a missing build dependency of
libguestfs on Debian.  It also needs to be a runtime dependency.

Because it's not a build-time dependency, it doesn't get pulled in to
the 'packages' file.  It also has to be a runtime dependency so that
users will have it installed on their machines.

(2) The second problem is that we run 'dhclient', but for some reason
this command cannot acquire an IP address unless you name a specific
interface (eg 'dhclient eth0').  This was already reported for Ubuntu:

https://bugzilla.redhat.com/show_bug.cgi?id=1224795

The workaround is just this patch (to appliance/init):

-      dhclient
+      dhclient eth0

but I don't know why that works.  I believe this to be a bug in
dhclient, not in libguestfs.

Rich.

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