scratchoo

Create Bridge interface on the host and give internet access

sudo ip link add name br0 type bridge
sudo ip addr add 172.20.0.1/24 dev br0
sudo ip link set dev br0 up
sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables --table nat --append POSTROUTING --out-interface enp3s0 -j MASQUERADE
sudo iptables --insert FORWARD --in-interface br0 -j ACCEPT

Create a tap device and link to the bridge

	#!/usr/bin/env bash

	apt_wait () {
	while sudo fuser /var/lib/dpkg/lock >/dev/null 2>&1 ; do
	sleep 1
	done
	while sudo fuser /var/lib/apt/lists/lock >/dev/null 2>&1 ; do
	sleep 1
	done
	if [ -f /var/log/unattended-upgrades/unattended-upgrades.log ]; then

	require "open3"

	def execute_shell(command, verbose: false)
	Rails.logger.info "[SHELL] #{command}"

	# see: https://nickcharlton.net/posts/ruby-subprocesses-with-stdout-stderr-streams.html
	# see: http://stackoverflow.com/a/1162850/83386
	output = []
	Open3.popen3(command) do \|stdin, stdout, stderr, thread\|
	# read each stream from a new thread