Matt Wagner wags

Elasticsearch Cluster Installation & Configuration

A guide for installing and configuring an Elasticsearch cluster according to best practices. It contains a mix of setup steps and theory. Assuming that Ubuntu Server is already installed, and you have the server resources at your disposal (I used virtual machines), you can set up a complete, robust Elasticsearch cluster.

The information in this guide was assembled from the Elasticsearch documentation, notes from online training classes, and personal experience with the software.

What We're Building

A fully-functional Elasticsearch cluster consisting of nine total servers. There will be two client nodes, three master nodes and four data nodes. The theory section will provide insight into the node types and how to plan accordingly. The hands-on installation section will go through all the steps required to build it.

Theory

Use this code before performing a rolling restart of an Elasticsearch cluster. The transient field means that the setting will be reset the next time Elasticsearch is restarted on the node.

Disable

PUT /_cluster/settings
{
  "transient": {
    "cluster.routing.allocation.enable": "none"
 }

5 entertaining things you can find with the GitHub Search API

Let's have some command-line fun with curl, [jq][1], and the [new GitHub Search API][2].

Today we're looking for:

The hottest repositories created in the last week.
The oldest user accounts with zero followers. (So sad.)
Issue trends by language.
Clojure projects defying convention.

Handy notes from this article.

git submodule add https://github.com/caarlos0/shell-travis-build.git build
cp build/travis.yml.example .travis.yml

Adds ShellCheck verification via Travis CI for any shell scripts in the repo.

	.button {
	border: 1px solid #DDD;
	border-radius: 3px;
	text-shadow: 0 1px 1px white;
	box-shadow: 0 1px 1px #fff;
	font: bold 11px Sans-Serif;
	padding: 6px 10px;
	white-space: nowrap;
	vertical-align: middle;
	color: #666;

	***
	*** Get the computer name (Windows) from the data returned by the ENV[IRONMENT] command.
	*** Local function technique requires UniVerse version 11.2 or greater
	***

	DEFFUN getComputerName

	RESULT = getComputerName()
	CRT "COMPUTER NAME IS ":RESULT
	END

	function DATE.UTILITY(method,arguments)
	* DTV: Various date & time methods not handled by OCONV, eg.ISO8601, RFC1123
	*// Stuart Boydell 2003-02-24
	*//
	*// Change E.DEFAULT.TZ for target server time zone locale.
	*//
	*// see http://www.timeanddate.com for more information about times and time zones
	*//
	*// Catalog this globally.
	*// Call as either function ! i-type subr() with method and arguments.

	-vm
	C:/Program Files/Java/jre1.8.0_60/bin/server
	-startup
	plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
	--launcher.library
	plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.300.v20150602-1417
	-product
	org.eclipse.epp.package.jee.product
	--launcher.defaultAction
	openFile

	require_relative "test_helper"

	require "open-uri"
	require "net/http"

	class EmojiTest < Blog::Test
	def test_no_emoji
	posts.each do \|post\|
	content = File.read(post)
	refute_match /:[a-zA-Z0-9_]+:/, content,

	EOM = OCONV(ICONV(OCONV(@DATE+31,'D-YM[4,2]'):'-01','D-YMD[4,2,2')-1,'D-YMD[4,2,2]')
	CRT "END OF MONTH: ":EOM