congnt24

Common OpenSSL Commands with Keys and Certificates

SSL Info

Generate RSA private key with certificate in a single command

openssl req -x509 -newkey rsa:4096 -sha256 -keyout example.key -out example.crt -subj "/CN=example.com" -days 3650 -passout pass:foobar

Generate Certificate Signing Request (CSR) from private key with passphrase

openssl x509 -x509toreq -in example.crt -out example.csr -signkey example.key -passin pass:foobar

congnt24

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

congnt24

git clone https://github.com/vfarcic/k8s-specs.git

cd k8s-specs

git pull

open "https://console.aws.amazon.com/iam/home#/security_credential"

export AWS_ACCESS_KEY_ID=[...]

congnt24

// getComponent is a function that returns a promise for a component
// It will not be called until the first mount
function asyncComponent(getComponent) {
  return class AsyncComponent extends React.Component {
    static Component = null;
    state = { Component: AsyncComponent.Component };

    componentWillMount() {
      if (!this.state.Component) {
        getComponent().then(Component => {

congnt24

Step By Step Guide to Configure a CoreOS Cluster From Scratch

This guide describes how to bootstrap new Production Core OS Cluster as High Availability Service in a 15 minutes with using etcd2, Fleet, Flannel, Confd, Nginx Balancer and Docker.

Content

• Introduction
  • Tools Used
• Basic Configuration

congnt24

Client-side SSL

For excessively paranoid client authentication.

Using self-signed certificate.

Create a Certificate Authority root (which represents this server)

Organization & Common Name: Some human identifier for this server CA.

openssl genrsa -des3 -out ca.key 4096
openssl req -new -x509 -days 365 -key ca.key -out ca.crt

congnt24

# Need to do the following steps:
#  1. create /var/prometheus first.
#  2. run: docker-compose run promdash ./bin/rake db:migrate
nodeexporter:
  image: prom/node-exporter
  ports:
    - "9100:9100"

prometheus:
  image: prom/prometheus

congnt24

import UIKit
import MessageUI // Import MessageUI

// Add the delegate protocol
class ViewController: UIViewController, MFMessageComposeViewControllerDelegate {
    
    // Send a message 
    func sendMessage() {
        let messageVC = MFMessageComposeViewController()
        messageVC.body = "Message String"

congnt24

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream