Grigore Dutcovici Grigore147

RFC Template

Feature Name: (fill me in with a unique identity, myawesomefeature)

Type: (feature, enhancement)

Start Date: (fill me in with today's date, YYYY-MM-DD)

Author: (your names)

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

What are the Kubernetes certifications?

There are four Kubernetes certifications:

Rough Notes about CQRS and ES

Once upon a time…

I once took notes (almost sentence by sentence with not much editing) about the architectural design concepts - Command and Query Responsibility Segregation (CQRS) and Event Sourcing (ES) - from a presentation of Greg Young and published it as a gist (with the times when a given sentence was heard).

I then found other summaries of the talk and the gist has since been growing up. See the revisions to know the changes and where they came from (aka the sources).

It seems inevitable to throw Domain Driven Design (DDD) in to the mix.

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

	# Source: https://gist.github.com/ed8ad113fff4322ef309198d5455687f

	##############################################################################################
	# Full App Lifecycle In Kubernetes With Argo CD, DevSpace, vCluster, k3d, and GitHub Actions #
	# https://youtu.be/uU-EAQ8Vbvk #
	##############################################################################################

	# Referenced videos:
	# - How To Create Virtual Kubernetes Clusters With vcluster By loft: https://youtu.be/JqBjpvp268Y
	# - DevSpace - Development Environments in Kubernetes: https://youtu.be/nQly_CEjJc4

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

	# Source: https://gist.github.com/6fb3e7da327df9203d9d4c184fcb5831

	##############################################################################
	# Combining Argo CD (GitOps), Crossplane (Control Plane), And Kubevela (OAM) #
	# https://youtu.be/eEcgn_gU3SM #
	##############################################################################

	# Referenced videos:
	# - Argo CD - Applying GitOps Principles To Manage Production Environment In Kubernetes: https://youtu.be/vpWQeoaiRM4
	# - Cloud-Native Apps With Open Application Model (OAM) And KubeVela: https://youtu.be/2CBu6sOTtwk

	// Remove duplicates from an array
	(function() {
	Array.prototype.unique = function() {
	return Array.from(new Set(this));
	};
	console.log([1, 2, 3, 4, 4, 5].unique()); // [1, 2, 3, 4, 5]
	})();

	// Memoized function
	(function() {

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048