Path: csiph.com!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!2.eu.feeder.erje.net!feeder.erje.net!usenet.goja.nl.eu.org!aioe.org!bofh.it!news.nic.it!robomod
From: john doe <johndoe65534@mail.com>
Newsgroups: linux.debian.user
Subject: Re: systemd-nspawn networking inside VirtualBox VM
Date: Tue, 07 Jul 2020 18:30:01 +0200
Message-ID: <ApYDL-3mL-1@gated-at.bofh.it>
References: <ApVZf-1HS-3@gated-at.bofh.it>
Old-Return-Path: <johndoe65534@mail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: quoted-printable
Approved: robomod@news.nic.it
Lines: 60
Organization: linux.* mail to news gateway
Sender: robomod@news.nic.it
Xref: csiph.com linux.debian.user:224511

On 7/7/2020 3:13 PM, Didar Hossain wrote:
> Hi,
>
> TL;DR
> How to get systemd-nspawn containers networking so that they can talk to=
 each
> other, the host and the internet inside a Buster VM? VirtualBox on Windo=
ws 10
> which has internet connectivity via a wireless interface.
>
>
>
> I am running a Buster VM with hand picked minimal packages, networking i=
s
> configured simply using interfaces(5) file with DHCP. I have configured =
a
> "NatNetwork" on VirtualBox which allows the VMs to connect to each other=
 and the
> internet. I was wondering if I can do similar thing with containers insi=
de the
> buster VM.
>
> I used `debbootstrap' to have a template directory of buster under
> "/opt/templates/buster". I then simply copy the directory tree over to
> "/var/lib/machines". I tried a few networking options of `systemd-nspawn=
', but
> since I am not well educated about macvlan, ipvlan, I could not get the
> networking working at all. I would like to avoid using
> "systemd-networkd/systemd-resolvd" especially on the Buster host - using=
 those
> it seems should make everything work automagically.
>
> If it works then I will be able to test my Dovecot/Exim setup easily in =
such
> throwaway containers. I currently do testing using VMs.
>
> Does anyone have experience in having this kind of scenario working?
>

For testing purposes, I use in a Buster VM systemd-container.
That is if your VM has internet access the containers will also get
internet access .

For sake of simplicity, I would strongly suggest you to use in the VM
systemd-networkd to get the networking working between the containers
and the VM.

$ debootstrap --include=3Dsystemd-container

You need the above debootstrap pkg for systemd-networkd to work in the
container.

Then in the VM and in eatch container, simply enable systemd-networkd.


If you realy want to do the networking yourself, you will need to create
the bridge based on the examples found in '/lib/systemd/network'.

=2D-
John Doe