arif setiawan arifsetiawan

Setting up a SSL Cert from Comodo

I use Namecheap.com as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Purchase the cert

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

Producers send messages to brokers
Consumers read messages from brokers
Messages are sent to a topic

Benchmarking Nginx with Go

There are a lot of ways to serve a Go HTTP application. The best choices depend on each use case. Currently nginx looks to be the standard web server for every new project even though there are other great web servers as well. However, how much is the overhead of serving a Go application behind an nginx server? Do we need some nginx features (vhosts, load balancing, cache, etc) or can you serve directly from Go? If you need nginx, what is the fastest connection mechanism? This are the kind of questions I'm intended to answer here. The purpose of this benchmark is not to tell that Go is faster or slower than nginx. That would be stupid.

So, these are the different settings we are going to compare:

Go HTTP standalone (as the control group)
Nginx proxy to Go HTTP
Nginx fastcgi to Go TCP FastCGI
Nginx fastcgi to Go Unix Socket FastCGI

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two main modes to run the Let's Encrypt client (called Certbot):

Standalone: replaces the webserver to respond to ACME challenges
Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80).

In the following, we're setting up mydomain.com. HTML is served from /var/www/mydomain, and challenges are served from /var/www/letsencrypt.

	---
	# ^^^ YAML documents must begin with the document separator "---"
	#
	#### Example docblock, I like to put a descriptive comment at the top of my
	#### playbooks.
	#
	# Overview: Playbook to bootstrap a new host for configuration management.
	# Applies to: production
	# Description:
	# Ensures that a host is configured for management with Ansible.

	/*
	* Selenium WebDriver JavaScript test with Mocha and NodeJS
	*
	* Start with: SELENIUM=PATH_TO_SELENIUM_JAR/selenium-server-standalone-2.31.0.jar mocha -t 10000 -R list google-sample.js
	*
	* Download selenium-server-standalone-2.31.0.jar from https://selenium.googlecode.com/files/selenium-server-standalone-2.31.0.jar
	* 'sudo su' and 'npm install -g colors mocha selenium-webdriver'
	*
	* http://visionmedia.github.io/mocha/
	* https://code.google.com/p/selenium/wiki/WebDriverJs

	docker-machine create \
	--driver=digitalocean \
	--digitalocean-access-token=$DO_TOKEN \
	--digitalocean-size=512mb \
	--digitalocean-region=nyc3 \
	--digitalocean-private-networking=true \
	--digitalocean-image=ubuntu-15-04-x64 \
	docker-swarm-kv-store

	docker $(docker-machine config docker-swarm-kv-store) run -d \

	package main

	import (
	"fmt"
	"net/http"
	"reflect"
	"strconv"

	"github.com/jinzhu/gorm"
	"github.com/labstack/echo"

	package main

	import (
	"fmt"
	"github.com/codegangsta/negroni"
	"github.com/gorilla/mux"
	"log"
	"net/http"
	)

	a.myhost.com {
	tls off
	root /var/www/
	proxy / localhost:8091
	log log/access.a.log
	}

	b.myhost.com {
	tls off
	root /var/www/