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

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

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

danbst

function nixeval { eval echo -en "$(nix-instantiate --eval --strict "$@" | sed 's/${/\\${/g')"; }

Evaluate Nix expression and remove quotes from resulting expresssion:

$ nixeval -E 'builtins.toJSON __nixPath' | jq
[             
 {

danbst

####################################################################################
#   Nix shell for nix-powered environments
#   This is like `virtualenv`, but with fine-defined system dependencies
####################################################################################
rec {
    nanomsg-py = pythonPackages.buildPythonPackage {
        name = "nanomsg-1.0";
        src = pkgs.fetchurl { url = "https://pypi.python.org/packages/0b/b1/3037e0e380d5fab2824e69a59bd374da402c0cef264ccb3fe5d71c230c4b/nanomsg-1.0.tar.gz"; sha256 = "843be41258219d9d319cf434a68cac7669834ab9c993ea4bab5b3d87f62a7a13"; };
        doCheck = false;
        buildInputs = [ pkgs.nanomsg ];

danbst

#!/usr/bin/env nix-shell
#!nix-shell -i bash -p gitMinimal nix-prefetch-git jq
set -e
project="$1"
branch="${2:-master}"

owner=$(echo "$project" | cut -d/ -f1)
repo=$(echo "$project" | cut -d/ -f2)
rev=$(git ls-remote "git://github.com/$project.git" "$branch" | head -n1 | awk '{print $1}')
rev=${rev:-$2}