danbst

# onsub.py - execute commands recursively on subrepositories
#
# Copyright 2010, 2011 aragost Trifork
#
# This software may be used and distributed according to the terms of
# the GNU General Public License version 2 or any later version.

import os
from mercurial.i18n import _
from mercurial import extensions, subrepo, util, cmdutil

danbst

#! /usr/bin/env nix-build
{ pkgs ? import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/2fa9bd50597c3089cc00abb3f20d7510fcc8ad6a.tar.gz) { }
}:
let
  inherit (pkgs) stdenv lib;
  theoremDistrib = pkgs.fetchurl {
    url = https://download.microsoft.com/download/D/1/D/D1D6FCF9-4D04-49FE-9952-0D295B180CF4/4ct.msi;
    sha256 = null;
  };
  theoremSrc = stdenv.mkDerivation {

danbst

{ pkgs, config, ...}: {

  boot.kernel.sysctl."net.core.rps_sock_flow_entries" = "32768";

  networking.usePredictableInterfaceNames = false; # we want eth0

  system.activationScripts.network_debloat = {
    text = ''
      interface=eth0
      ${pkgs.iproute}/bin/tc qdisc replace dev "$interface" root fq_codel

danbst

{ pkgs }:
let
   old_iproute = { fetchurl, stdenv, flex, bison, db4, iptables, pkgconfig }:
        stdenv.mkDerivation rec {
          name = "iproute2-3.6.0";

          src = fetchurl {
            url = http://kernel.org/pub/linux/utils/net/iproute2/iproute2-3.6.0.tar.xz;
            sha256 = "0d05av2s7p552yszgj6glz6d74jlmg392s7n74hicgqfl16m85rd";
          };

danbst

# based on https://gist.github.com/thoughtpolice/1faff37f0a17e1ab291d
# updated for nixos-16.09

/*
Example usage (in configuration.nix):
          services.phabricator = {
            enable = true;
            baseURI      = "https://phabricator.example.org";
            baseFilesURI = config.services.phabricator.baseURI;
            rootDir = "/var/phabricator";

danbst

{ pkgs, lib, config, ...}:

let

  cfg = config.services.postgresql;

  initConfigScript = ''
    ln -sf ${pkgs.writeText "pg_hba.conf" cfg.authentication} ${cfg.dataDir}/pg_hba.conf
    ln -sf ${pkgs.writeText "pg_ident.conf" cfg.identMap} ${cfg.dataDir}/pg_ident.conf
    ln -sf ${configFile} ${cfg.dataDir}/postgresql.conf

danbst

# this example adds an option `.tomcatProxy` in namespace
#   services.nginx.virtualHosts.*.locations.*
# that acts as alternative to specifying actual nginx config in .extraConfig
#
# execute with
/*
  cat $(grep -o "/nix/store/[a-z0-9]*-nginx.conf" \
        $(NIX_PATH=nixos-config=./example.nix:$NIX_PATH \
          nix-build --no-out-link -E '
            with import <nixpkgs/nixos> {};

danbst

Munin service ver 2.999.5

Use like
```
    services.mm.munin-cron.enable = true;
    services.mm.munin-cron.hosts = ''
        [server1]
        address server1
        [server2]
        address server2

danbst

with import <nixpkgs> {};
with import (stdenv.mkDerivation {
  name = "trick-to-make-binary-channels-go-away";
  buildCommand = ''
    grep -iq nixos /proc/sys/kernel/version || (echo "Can be built only on NixOS!" && exit 1)
    echo '{}' > $out
  '';
});
stdenv.mkDerivation {
  name = "build-only-on-nixos";

danbst

Switching NixOS architecture (32bit -> 64bit)

There are rumors, that you can switch from system architecture just adding 1 configuration option:

nixpkgs.system = "x86_64-linux"

and running nixos-rebuild boot && reboot.