Chris Olstrom colstrom

YARD CHEATSHEET http://yardoc.org

May 2020 - updated fork: https://gist.github.com/phansch/db18a595d2f5f1ef16646af72fe1fb0e

cribbed from http://pastebin.com/xgzeAmBn

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

Modules

So, to get something like /etc/rc.local you can use the custom SMF import facility. (See the source for more information about how this actually works.)

/opt is mounted out of zones/opt by default. You can create a directory /opt/custom/smf and populate it with SMF manifests. Any manifests you put in there will be imported by SmartOS when it boots. Below is an example SMF manifest that simply starts /opt/custom/bin/postboot, a self-explanatory shell script that you can use like /etc/rc.local.

Note that it would likely be better to customise and respin your own images, as putting a bunch of platform state in the zones pool undoes some of the benefits of the ramdisk platform architecture that SmartOS has.

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"

Create SHA512 passwords

# make sure to use a leading space so that the command is not stored in your bash history!!
 mkpasswd -m sha-512 password1
# generates -> $6$yMgsow58.g/Z$mBjHfdVzqcF/LN.iwV23Eyqg.yGPTsp9pOwaStsJ6c4I4zL7BhucVVAkv5guf7OVRr8Pw0mHF4NrWBRCG5ci7/
 mkpasswd -m sha-512 password2
# generates -> $6$RZ86vRkQ$aRKN1HOsk6bDHBbMhS7jSo/p1NGFl4PvwY3KpU.72i./LvITi41nL84EkxOFXl.6Bmhynj/L7pYbfF0rUHtOB0

	;; outlet code for implementing traditional macro expansion

	;; macros

	(define (expand form)
	(cond
	((variable? form) form)
	((literal? form) form)
	((macro? (car form))
	(expand ((macro-function (car form)) form)))

	#!/usr/bin/env python
	# zmqc: a small but powerful command-line interface to ZMQ.

	## Usage:
	# zmqc [-0] (-r \| -w) (-b \| -c) SOCK_TYPE [-o SOCK_OPT=VALUE...] address [address ...]

	## Examples:
	# zmqc -rc SUB 'tcp://127.0.0.1:5000'
	#
	# Subscribe to 'tcp://127.0.0.1:5000', reading messages from it and printing

	#!/bin/bash

	# node.js using PPA (for statsd)
	sudo apt-get install python-software-properties
	sudo apt-add-repository ppa:chris-lea/node.js
	sudo apt-get update
	sudo apt-get install nodejs npm

	# Install git to get statsd
	sudo apt-get install git

	# Licensed under CC BY 3.0 http://creativecommons.org/licenses/by/3.0/
	# Derived works must attribute https://gist.github.com/4492300 at the beginning, and the date.

	##################################################################
	Installing and Configuring SmartOS on a budget server (with a /29)
	##################################################################

	# if you find this gist useful, please star it

	# please be aware that budget hosting companies usually cut corners somewhere,

	license: gpl-3.0
	height: 600
	redirect: https://observablehq.com/@d3/d3-force-directed-graph