Clivern

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

Clivern

# Docker
docker pull rabbitmq
docker run -d --hostname my-rabbit --name some-rabbit -p 4369:4369 -p 5671:5671 -p 5672:5672 -p 15672:15672 rabbitmq
docker exec some-rabbit rabbitmq-plugins enable rabbitmq_management

# Login at http://localhost:15672/ (or the IP of your docker host)
# using guest/guest

Clivern

#! /bin/bash

sudo apt-get install -y software-properties-common python-software-properties

# 1. Add Ondrejs PPA Repo and update
echo "$(tput setaf 2)1. Add Ondrejs PPA Repo and update...$(tput sgr 0)"
sudo add-apt-repository ppa:ondrej/php -y -u

# 2. Remove default PHP 7.0
echo "$(tput setaf 2)2. Update PHP to latest$(tput sgr 0)"

Clivern

#!/usr/bin/env bash
set -e

echo "Installing dependencies..."
sudo apt-get update -y
sudo apt-get install -y unzip


echo "Fetching vault..."
VAULT=0.6.5

Clivern

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

type Artist struct {

Clivern

// Now available in package form at https://github.com/rjz/githubhook

package handler

// https://developer.github.com/webhooks/
import (
	"crypto/hmac"
	"crypto/sha1"
	"encoding/hex"
	"errors"

Clivern

Let's migrate a Symfony 2.8 LTS application to Symfony 3 LTS

Handle deprecations

First of all, ensure you don't have any deprecated!

The Symfony documentation explains it well, but let's sum up:

• install the phpunit bridge ($ composer require --dev symfony/phpunit-bridge)
• also check all your pages using web profiler and be ensure there is no deprecation error handled
• found errors and need help about how to fix it ? I did a sort of guide.

Clivern

From Symfony 2.3 to Symfony 2.7: the complete guide

Objectives

• assume your code doesn't use any deprecated from versions below Symfony 2.3
• update dependencies from 2.3 to 2.7
• do not support "deprecated", be "Symfony3-ready"
• list tasks component by component, bundle by bundle.

Clivern

A lack of memory or swap, or not having swap configured

$ sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
$ sudo /sbin/mkswap /var/swap.1
$ sudo /sbin/swapon /var/swap.1

Clivern

import datetime
import pytz

unaware = datetime.datetime(2019, 8, 15, 8, 15, 12, 0)
aware = datetime.datetime(2019, 8, 15, 8, 15, 12, 0, pytz.UTC)

now_aware = unaware.replace(tzinfo=pytz.UTC)


assert aware == now_aware