Saroj Mahato Creator54

Autologin a user at the console (NixOS)

Problem

NixOS provide services.mingetty.autologinUser option, but it can’t be used for the specific TTY.

Minimal working example

TTY1 and user “guest”:

Add on top of default.nix: with import {}; or simply run as nix-build '' (i. e. for nix-build complaining) or rather nix-build -E 'with import {}; callPackage ./default.nix {}' (or even import)

Shifting an unprivileged LXC container to privileged

Still experimental...

Assume that the unprivileged container test already exists. We want a privileged container called test2 to have the same rootfs as test.

Create `test2`

Create a privileged container first. Probably need to be the exact same OS as test1!

Setting up docker to run in a PRIVILEGED LXC container

Set up a privileged container

Create container

Let's call the container docker_test1.

$ sudo lxc-create -t download -n docker_test1
...
Follow the prompts on the screen to set up the new container.

PCI Passthrough

Warning: unfinished (but successfull!)

I did PCI passthrough on Archlinux and Debian with the old PCI-stub method (this was pre-4.0 era). And later I did PCI passthrough on the 4.1+ kernels on Arch and Ubuntu (16.10 I think?).

This is my attempt at doing the same on Nixos.

Requirements

Installing NVIDIA Driver & CUDA inside an LXC container running Ubuntu 16.04 on a neuroscience computing server.

Introduction: I was trying to run some neuroscience image processing commands that uses NVIDIA GPU. The challenge is that most of our computation will be run inside an LXC container running Ubuntu 16.04 (the host runs Ubuntu 16.04 as well). Installing the NVIDIA driver on the host is not so hard, but doing it inside the LXC container is much more challenging.

I already have an unprivileged container running, so I will not repeat the steps to create an LXC container here.

Our graphics card is NVIDIA GeForce GTX 1080 Ti.

Here are the main steps:

PCI Passthrough

Warning: unfinished (but successfull!)

I did PCI passthrough on Archlinux and Debian with the old PCI-stub method (this was pre-4.0 era). And later I did PCI passthrough on the 4.1+ kernels on Arch and Ubuntu (16.10 I think?).

This is my attempt at doing the same on Nixos.

	{ pkgs ? import <nixpkgs> {} }:

	let

	# To use this shell.nix on NixOS your user needs to be configured as such:
	# users.extraUsers.adisbladis = {
	# subUidRanges = [{ startUid = 100000; count = 65536; }];
	# subGidRanges = [{ startGid = 100000; count = 65536; }];
	# };

	@echo off
	set /p Y=Enter adb.exe folder path:
	cd /d %Y%
	adb devices
	pause
	for %%X in (
	"com.amazon.appmanager"
	"com.android.browser"
	"com.android.chrome"
	"com.android.email"

	<!DOCTYPE html>
	<html lang="pt-BR">
	<head>
	<meta chatset="UTF-8" />
	<title>CSS Progress Bar</title>

	<style>
	.wrapper {
	width: 500px;
	}

Saroj Mahato Creator54

Autologin a user at the console (NixOS)

Problem

Minimal working example

Shifting an unprivileged LXC container to privileged

Create test2

Setting up docker to run in a PRIVILEGED LXC container

Set up a privileged container

Create container

PCI Passthrough

Warning: unfinished (but successfull!)

Requirements

Installing NVIDIA Driver & CUDA inside an LXC container running Ubuntu 16.04 on a neuroscience computing server.

PCI Passthrough

Warning: unfinished (but successfull!)

Requirements

Create `test2`