cashlalala cashlalala

Elasticsearch

Templates

Elasticsearch is index based storage. Many things need to be considered when creating indices such as properties, data types, number of shards, number of replicas, refresh interval. Elasticsearch doesn't have schemas. All these things can be set when creating the index or use a template to handle it. After template defined, all the indices that match "index_patterns" will apply all the properties in the template. By using templates, it becomes easier to change index settings, mappings and aliases.

example: https://medium.com/swlh/build-and-use-go-packages-as-c-libraries-889eb0c19838

https://medium.com/@walkert/fun-building-shared-libraries-in-go-639500a6a669

https://www.darkcoding.net/software/building-shared-libraries-in-go-part-2/

https://karthikkaranth.me/blog/calling-c-code-from-go/

A Highcharts example in use with Webpack and Babel.

Install

Download source files
Run npm install to install all dependencies.
Run npm run build to bundle app.js into bundle.js

Open application

Open index.html in a browser.

Introduction

So HAProxy is primalery a load balancer an proxy for TCP and HTTP. But it may act as a traffic regulator. It may also be used as a protection against DDoS and service abuse, by maintening a wide variety of statistics (IP, URL, cookie) and when abuse is happening, action as denying, redirecting to other backend may undertaken ([haproxy ddos config], [haproxy ddos])

	using System;
	using System.Runtime.InteropServices;
	using System.Text;

	namespace GoSharedDLL
	{
	class Program
	{
	[DllImport("shared.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
	private static extern IntPtr ReturnReversedString(byte[] input);

	{
	"annotations": {
	"list": [
	{
	"builtIn": 1,
	"datasource": "-- Grafana --",
	"enable": true,
	"hide": true,
	"iconColor": "rgba(0, 211, 255, 1)",
	"name": "Annotations & Alerts",

	# First install prometheus-operator:
	#
	# helm install coreos/prometheus-operator --name prometheus-operator
	#

	apiVersion: monitoring.coreos.com/v1
	kind: ServiceMonitor
	metadata:
	name: node-exporter
	# Namespace of prometheus operator

	* Shows a message while asserting like:

	ok: [host] => {
	"msg": "disk usage 4.2B of total 20.0GB (21.0%) (should exceed limit 90.0%)"
	}

	* Note this only looks at first mount point on current node
	* Fails if disk is near-full
	* Last step pushes to a push-based monitoring service, which will alert us if it doesn't get there after some time
	* Need to setup a variable `disk_limit`, which is the max acceptable usage ratio, e.g. set it to 0.8 if you want to keep disks within 80% of max size

	'''
	Created on Oct 19, 2017

	@author: cash.chang
	'''
	from argparse import ArgumentParser, ArgumentDefaultsHelpFormatter
	import json
	import logging
	import logging.config
	import os

	package main

	import (
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"io/ioutil"
	"net/http"
	)