[Bug 1989596] Re: Completing Copying of Logs stage takes a very long time

[Nick Rosbrook]

The cause of this is that livecd.ubuntu.squashfs contains an
/etc/resolv.conf with private DNS servers (I think it was copied from
the build environment). This is copied to the target chroot, so the call
of `apt-get update` in d-i/source/apt-setup/finish-install.d/10apt-
cdrom-setup[1] repeatedly fails with timeouts, until finally giving up
after 10 minutes or so.

I have not figured out if this is due to a change in the build
environment, or if systemd-resolved packaging changes broke assumptions
in live-build build scripts such as lb_chroot_resolv [2].

[1] https://git.launchpad.net/ubuntu/+source/ubiquity/tree/d-i/source/apt-setup/finish-install.d/10apt-cdrom-setup
[2] https://git.launchpad.net/ubuntu/+source/live-build/tree/scripts/build/lb_chroot_resolv

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https://bugs.launchpad.net/bugs/1989596

Title:
  Completing Copying of Logs stage takes a very long time

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