mfikes

We've learned a bit about how ClojureScript's macro system works in bootstrapped mode over the past half year.

Here is a collection of posts I've made on the subject.

But first, it's probably worth reading https://github.com/clojure/clojurescript/wiki/Differences-from-Clojure#macros

• Portable Macro Musing was written prior to bootstrapped macros really being available (really—at the time all you could do was stuff like this.
• Runtime macroexpand is about using bootstrap's runtime capability to expand macros.
• Messing with Macros at the REPL explores a bit about how bootstrap macros are put into a pseudo-namespa

richp10

// This systemd runs iptables-restore on boot:
[Unit]
Description=Packet Filtering Framework
DefaultDependencies=no
After=systemd-sysctl.service
Before=sysinit.target

[Service]
Type=oneshot
ExecStart=/usr/sbin/iptables-restore /opt/docker/scripts/iptables/iptables.rules

dominicsayers

What I actually did

/etc/security/limits.conf

elasticsearch hard memlock 100000

/etc/default/elasticsearch

tancnle

#!/bin/sh

# Update latest epel
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo rpm -Uvh epel-release-6-8.noarch.rpm

# Download and build mosh
sudo yum -y install rpm-build rpmdevtools protobuf-compiler protobuf-devel libutempter-devel zlib-devel ncurses-devel openssh-clients perl-IO-Tty openssl-devel gcc gcc-c++ 
rpmdev-setuptree
cd ~/rpmbuild/SOURCES

mmoulton

Docker stats collection for collectd

This script can be used to feed collectd with cpu and memory usage statistics for running docker containers using the collectd exec plugin.

This script will report the used and cached memory as well as the user and system cpu usage by inspecting the appropriate cgroup stat file for each running container.

Usage

This script is intented to be executed by collectd on a host with running docker containers. To use, simply configure the exec plugin in collectd to execute the collectd-docker.sh script. You may need to adjust the script to match your particulars, such as the mount location for cgroup.

aaronfeng

Application specific host grouping in Riemann-dash

It is generally desirable to group all the hosts for a specific service into a single dashboard view. For example, all the web servers are in single view while all the database servers are in another view.

This is usually not an issue when you are sending custom metrics using Riemann client. However, there are cases where you are using something that you do not control how the metrics are being sent. i.e., Riemann-tools.

Since Riemann-tools scripts are application agnostic, in order for the dashboard view to group hosts, we must inject some application specific information into the tags field. Tags is a collection of arbitrary strings. In the case of Riemann-tools scripts you can pass in arbitrary strings on the command line.

riemann-health --host 127.0.0.1 --tag "prod" --tag "webserver"

Mithrandir0x

// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
// author: Pawel Kozlowski

var myApp = angular.module('myApp', []);

//service style, probably the simplest one
myApp.service('helloWorldFromService', function() {
    this.sayHello = function() {
        return "Hello, World!"

jimbojsb

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

creationix

// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided

necolas

/*
 * Property prefix hacks
 */

/* IE6 only - any combination of these characters */

_ - £ ¬ ¦

/* IE6/7 only - any combination of these characters */