Using docker container to run legacy brickstrap

[BrendanSimon]

Is it possible to use a Docker container (e.g. running Debian Buster) to run the legacy brickstrap to generate a rootfs ?

My current setup is a Debian Jessie install on a VirtualBox VM (on my Mac). It's time to upgrade.

I initially was going to migrate to a Debian Buster (or Unbuntu 20.04) distro on a VirtualBox VM (on a Windows 10 laptop).

I'm sure that would work, however I thought maybe using Docker and Hyper-V would be lighter and faster. I managed to install an Debian Buster container, with various tool, cloned my frozen brickstrap repo and tried to build.

I got stuck in these places.

• key errors with multistrap
• installing libguestfs requires lvm2, which just hangs during install.
• no /boot/vmlinuz* files required by guestfs

Get:1 http://deb.debian.org/debian buster InRelease [121 kB]
Err:1 http://deb.debian.org/debian buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY DCC9EFBF77E11517
Reading package lists... Done
W: GPG error: http://deb.debian.org/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY DCC9EFBF77E11517
E: The repository 'http://deb.debian.org/debian buster InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
apt update failed. Exit value: 100

I think the install scripts for lvm2 are trying to determine a runlevel but Docker containers are not runlevel aware as they don't run systemd (this is as far as I can workout from good old googling).

So is this thing going to fly or am I better off just running a full Debian or Ubuntu OS in a VM ?

NOTE: this is a first step so I don't break my current build with the legacy brickstrap. After that I want to try the new brickstrap.

Thanks, Brendan.