Md. Sany Ahmed sany2k8

This is a sample of how to send some information to logstash via the TCP input in nodejs or python. It assumes the logstash host is on 10.10.10.100 and the TCP listening input is 9563.

The logstash.conf should look something like the sample file.

The log message should be a stringified JSON object with the log message in the @message field.

To use, run the node script node sendMessageToLogstash.js, or the python script python sendMessageToLogstash.js

Installing with apt-get

#!/bin/sh
# https://docs.docker.com/engine/installation/linux/ubuntu/#install-using-the-repository
sudo apt-get update && sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88 | grep docker@docker.com || exit 1
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update

(still a work-in-progress)

Shortlinks:

Cluster Health
- Index Level
- Shard Level
Nodes Overview
Indices Overview
Cluster Maintenance

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

sudo apt-get install python-setuptools
wget http://downloads.sourceforge.net/project/s3tools/s3cmd/1.5.0-alpha1/s3cmd-1.5.0-alpha1.tar.gz
tar xvfz s3cmd-1.5.0-alpha1.tar.gz
cd s3cmd-1.5.0-alpha1
python setup.py install
s3cmd --configure

	// This is super slow though: http://jsperf.com/summing-objects/2

	var sumObj = function (object) {
	if (Object.keys(object).length) {
	var firstKey = Object.keys(object)[0];
	var clone = Object.assign({}, object);
	delete clone[firstKey];
	return parseInt(object[firstKey]) + sumObj(clone);
	}

	# coding:utf-8

	from elasticsearch import Elasticsearch
	import json

	# Define config
	host = "127.0.0.1"
	port = 9200
	timeout = 1000
	index = "index"

	# Ask for the user password
	# Script only works if sudo caches the password for a few minutes
	sudo true

	# Install kernel extra's to enable docker aufs support
	# sudo apt-get -y install linux-image-extra-$(uname -r)

	# Add Docker PPA and install latest version
	# sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
	# sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

	First install pip for Python2. Download the get-pip.py file from https://bootstrap.pypa.io/get-pip.py
	$ cd <download location>
	$ sudo -H python ./get-pip.py

	Installing pip also installs Python3
	To run Python3
	$ python3

	Install pip3 by just executing the same file as in the step above, but this time using Python3
	$ sudo -H python3 ./get-pip.py

	<?php

	function get_combinations($arrays) {
	$result = array(array());
	foreach ($arrays as $property => $property_values) {
	$tmp = array();
	foreach ($result as $result_item) {
	foreach ($property_values as $property_value) {
	$tmp[] = array_merge($result_item, array($property => $property_value));
	}