karloscodes

Zero downtime deploys with unicorn + nginx + runit + rvm + chef

Below are the actual files we use in one of our latest production applications at Agora Games to achieve zero downtime deploys with unicorn. You've probably already read the GitHub blog post on Unicorn and would like to try zero downtime deploys for your application. I hope these files and notes help. I am happy to update these files or these notes if there are comments/questions. YMMV (of course).

Other application notes:

• Our application uses MongoDB, so we don't have database migrations to worry about as with MySQL or postgresql. That does not mean that we won't have to worry about issues with the database with indexes being built in MongoDB or what have you.
• We use capistrano for deployment.

Salient points for each file:

karloscodes

class Shape
  def initialize(color)
    @color = color
  end

  def repr
    raise 'Abstract method, to be implemented on subclasses'
  end

  def draw

karloscodes

class Email::Validate
  def self.call(email)
    new(email, RFC::CheckSyntaxt, SMTP::CheckUserExistance).call
  end

  attr_reader :email, :rfc_check_syntaxt, :smtp_check_user

  def initialize(email, rfc_check_syntaxt, smtp_check_user)
    @email = email
    @rfc_check_syntaxt = rfc_check_syntaxt

karloscodes

// This is meant to be executed periodically, adapt it depending on you sell pace
// or create reports for previous weeks instead of using doing it in realtime.
var moment = Moment.load();
var ss = SpreadsheetApp.getActiveSpreadsheet();

var startOfLastWeek = moment.utc().startOf('week').add(1, 'd');
var endOfLastWeek = moment.utc().endOf('week').add(1, 'd');

Logger.log('Week starts: ' + startOfLastWeek.toString());
Logger.log('Week ends: ' + endOfLastWeek.toString());

karloscodes

const { forEach, fromIter, map, filter, pipe, interval, take, fromPromise, flatten } = require('callbag-basics');
const request = require('request-promise');
const Promise = require('bluebird');

const events = [
  { type: 'event', value: 1 },
  { type: 'event', value: 2 },
  { type: 'event', value: 3 },

karloscodes

Example to find an object inside an array given a name then, returns its value

const R = require('ramda');

const sesNotification = {
  "notificationType": "Delivery",
  "mail": {
    "headers": [
 {

karloscodes

const R = require('ramda');
const users = [
  { ses: { sesCreds: 1 }, senders: [{ sender: 11 }, { sender: 12 }, { sender: 13 }] },
  { ses: { sesCreds: 2 }, senders: [{ sender: 21 }, { sender: 22 }, { sender: 23 }] },
  { ses: { sesCreds: 3 }, senders: [{ sender: 31 }, { sender: 32 }, { sender: 33 }] }
];

const notificationTypes = ['Bounce', 'Complaint'];

karloscodes

# ruby --version
# ruby 2.6.3p62


require 'benchmark'

def without_splat(a, b, c); end

def with_splat(*a); end

karloscodes

version: '3.3'

services:
 pg:
    image: postgres:10
    volumes:
      - pg_data:/var/lib/postgresql/data
    ports:
      - 5432:5432
      

karloscodes

// -----------------------------------------------
// OOP dependency injection (the repository implementation can be switched in runtime)
// -----------------------------------------------
class UserService {
  constructor(userRepository) {
    this.userRepository = userRepository
  }

  create(params) {
    validate(params)