Andrew Lipscomb AndrewLipscomb

Getting a minimal Ubuntu 16.04 Xenial nspawn container running

Making this work requires a bit of extra effort to get it to a nice point.

Essentially we are aiming for a container that:

Can be worked properly using machinectl
Can be logged into without having to type passwords (obviously don't do this if you expose it publically)

This guide assumes you run your networking with systemd-networkd - if you don't, you will need to sort out container networking yourself. Check you aren't using network-manager with

How to set up static nspawn IP address networking without a bridge

Note - this article assumes you have reasonable familiarity with systemd, networkd and nspawn/machinectl

What is this guide for

There seem to be a lot of references on the internet for nspawn networking with a bridge - but not on simply using the stock veth networking with static addresses. The default behaviour of nspawn (as of 24/03/20 and systemd:245 on Arch) is to:

Make a virtual ethernet port on the host (defined by /lib/systemd/network/80-container-ve.network)
Make a virtual ethernet port in the container (defined by /lib/systemd/network/80-container-host0.network)
Based on those configurations, serve the host port a random IP from the local network ranges with a 28 bit subnet, and a DHCP server for the host port serves a random IP in the subnet to the container

	import React, { Component } from 'react';
	import { Map, TileLayer, Circle, FeatureGroup } from 'react-leaflet';
	import { EditControl } from '../src';

	let polyline;
	const subs = [ 'a', 'b', 'c', 'd' ];

	export default class EditControlExample extends Component {
	constructor(props) {
	super(props);

	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the examples of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in

	* This command frequently resets itself (gosub Reboot:) to avoid the DA getting stuck.

	set script command: [COMMAND_DOCK_AGENT]

	skip if [HOMEBASE]-> exists
	return null

	$scriptName = get script name
	= [THIS]-> call script 'Lib.Gen.SetEIAutoStartParameters' : Args=null ScriptName=$scriptName
	[THIS]-> connect ship command/signal [SIGNAL_ATTACKED] to script 'Sig.Attacked.DockAgent' with prio 100

	<?xml version="1.0" standalone="yes"?>
	<?xml-stylesheet href="x2script.xsl" type="text/xsl"?>
	<!-- Generated using X-Studio -->
	<script>
	<name>Cmd.DockAgent</name>
	<version>308</version>
	<engineversion>50</engineversion>
	<description>Cmd: Manages a Sanctuary or a Dock by acquiring or distributing wares.</description>
	<arguments />
	<sourcetext>

	const {AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip} = Recharts;
	const data = [
	{wangs: 1.0, uv: 3},
	{wangs: 1.9999999999999, uv: 3},
	{wangs: 2.0, uv: 4},
	{wangs: 2.99999, uv: 4},
	{wangs: 3.0, uv: 2},
	{wangs: 3.99999, uv: 2},
	{wangs: 4.0, uv: 5},
	{wangs: 5.0, uv: 6},

	Wed 2019-04-10 10:38:38.133: job_maintainer_node: Client sent list for:
	Wed 2019-04-10 10:38:38.133: job_maintainer_node: /home/swarmbot/swarmbotCommon/PaddockDefinitions/BendeeWithRoads/GrassDownTheRoad/bendee_1_grass_down_the_road_1_of_1.txt
	Wed 2019-04-10 10:38:38.133: job_maintainer_node: /home/swarmbot/swarmbotCommon/PaddockDefinitions/BendeeWithRoads/HousePaddock/bendee_1_house_paddock_1_of_4.txt
	Wed 2019-04-10 10:38:38.133: job_maintainer_node: While continuing /home/swarmbot/swarmbotCommon/PaddockDefinitions/BendeeWithRoads/Airstrip/demo_goals_airstrip_1_of_3.txt
	Wed 2019-04-10 10:38:39.227: events_node: Setting event DebugEvent:1 -> Time delay exceeded
	Wed 2019-04-10 10:38:39.227: job_maintainer_node: --- Saved an image of the generated path outside the polygon to /home/swarmbot/path_not_in_poly.svg for path of 7 points ---
	Wed 2019-04-10 10:38:39.227: job_maintainer_node: Exception in File: /home/swarmbot/swarmbot4/swarmbot_ws/src/job_maintainer/src/travel_jo

	2019-04-11 14:21:42.525 BugTest[25240:2608649] +[NSValue valueWithMKCoordinate:]: unrecognized selector sent to class 0x7fff872763a8
	2019-04-11 14:21:42.526 BugTest[25240:2608649] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[NSValue valueWithMKCoordinate:]: unrecognized selector sent to class 0x7fff872763a8'
	*** First throw call stack:
	(
	0 CoreFoundation 0x00007fff2eeb0cf9 __exceptionPreprocess + 256
	1 libobjc.A.dylib 0x00007fff59a44a17 objc_exception_throw + 48
	2 CoreFoundation 0x00007fff2ef2aa56 __CFExceptionProem + 0
	3 CoreFoundation 0x00007fff2ee530ef ___forwarding___ + 1485
	4 CoreFoundation 0x00007fff2ee52a98 _CF_forwarding_prep_0 + 120
	5 libswiftCoreLocation.dylib 0x00007fff5ad61664 globalinit_33_25AD2332B1DC67E23B54508C4A7DAD45_func0 + 132

	Upon installation, make sure you have
	`dhclient iwd iwctl htop sudo`
	for networking, perf and basic sandwich needs

	Reboot and once back in normally, fix the keyboard to Norman

	```

	```