Add Vagrantfile, provisioning script

Debian-Vagrant-LXC/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+  # The most common configuration options are documented and commented below.
+  # For a complete reference, please see the online documentation at
+  # https://docs.vagrantup.com.
+
+  # Every Vagrant development environment requires a box. You can search for
+  # boxes at https://vagrantcloud.com/search.
+  config.vm.box = "debian/stretch64"
+  config.vm.provider "libvirt" do |libvirt|
+    # libvirt.cpus = 1
+    # libvirt.memory = 2048
+  end
+  config.vm.synced_folder '.', '/vagrant', disabled: true
+  config.vm.provision "shell", path: "./lxc.sh"
+
+  # Disable automatic box update checking. If you disable this, then
+  # boxes will only be checked for updates when the user runs
+  # `vagrant box outdated`. This is not recommended.
+  # config.vm.box_check_update = false
+
+  # Create a forwarded port mapping which allows access to a specific port
+  # within the machine from a port on the host machine. In the example below,
+  # accessing "localhost:8080" will access port 80 on the guest machine.
+  # NOTE: This will enable public access to the opened port
+  # config.vm.network "forwarded_port", guest: 80, host: 8080
+
+  # Create a forwarded port mapping which allows access to a specific port
+  # within the machine from a port on the host machine and only allow access
+  # via 127.0.0.1 to disable public access
+  # config.vm.network "forwarded_port", guest: 80, host: 8080, host_ip: "127.0.0.1"
+
+  # Create a private network, which allows host-only access to the machine
+  # using a specific IP.
+  # config.vm.network "private_network", ip: "192.168.33.10"
+
+  # Create a public network, which generally matched to bridged network.
+  # Bridged networks make the machine appear as another physical device on
+  # your network.
+  # config.vm.network "public_network"
+
+  # Share an additional folder to the guest VM. The first argument is
+  # the path on the host to the actual folder. The second argument is
+  # the path on the guest to mount the folder. And the optional third
+  # argument is a set of non-required options.
+  # config.vm.synced_folder "../data", "/vagrant_data"
+
+  # Provider-specific configuration so you can fine-tune various
+  # backing providers for Vagrant. These expose provider-specific options.
+  # Example for VirtualBox:
+  #
+  # config.vm.provider "virtualbox" do |vb|
+  #   # Display the VirtualBox GUI when booting the machine
+  #   vb.gui = true
+  #
+  #   # Customize the amount of memory on the VM:
+  #   vb.memory = "1024"
+  # end
+  #
+  # View the documentation for the provider you are using for more
+  # information on available options.
+
+  # Enable provisioning with a shell script. Additional provisioners such as
+  # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
+  # documentation for more information about their specific syntax and use.
+  # config.vm.provision "shell", inline: <<-SHELL
+  #   apt-get update
+  #   apt-get install -y apache2
+  # SHELL
+end

Debian-Vagrant-LXC/lxc.sh

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+#!/usr/bin/env bash
+
+apt-get update
+apt-get install -y vagrant-lxc cgroup-tools
+
+# Configure LXC
+echo "root:100000:65536" > /etc/subuid
+echo "vagrant:100000:65536" >> /etc/subuid
+
+echo "root:100000:65536" > /etc/subgid
+echo "vagrant:100000:65536" >> /etc/subgid
+
+mkdir -p /etc/lxc
+echo 'lxc.id_map = u 0 100000 65536' >> /etc/lxc/default.conf
+echo 'lxc.id_map = g 0 100000 65536' >> /etc/lxc/default.conf
+
+echo "vagrant veth lxcbr0 10" > /etc/lxc/lxc-usernet
+
+mkdir -p /home/vagrant/.config/lxc/
+echo "lxc.include = /etc/lxc/default.conf" > /home/vagrant/.config/lxc/default.conf
+echo 'lxc.id_map = u 0 100000 65536' >> /home/vagrant/.config/lxc/default.conf
+echo 'lxc.id_map = g 0 100000 65536' >> /home/vagrant/.config/lxc/default.conf
+chown -R vagrant:vagrant /home/vagrant/.config
+chmod a+x /home/vagrant
+
+systemctl restart lxc
+
+mkdir -p /etc/sysctl.d/
+echo kernel.unprivileged_userns_clone=1 > /etc/sysctl.d/80-lxc-userns.conf
+sysctl --system