Angelo Weiss FerraBraiZ

Terraform Certification Revision

Terraform by default provision concurrently 10 resources, to change use -parallelism=n on plan, apply and destroy commands.

Terraform is an immutable, declarative, Infraestructure as Code provisioning tool.

IaC provides benefits:

	#!/bin/bash

	# Get memory usage per child process
	memory_usage_per_child=$(ps --no-headers -o "rss,cmd" -C php-fpm \| awk '{ sum+=$1 } END { printf ("%d\n", sum/NR/1024) }');
	echo
	echo "Average memory usage per child: ${memory_usage_per_child}MB"

	# Get total available memory
	total_available_memory=$(free -m \| awk 'NR==2{print $2}');
	total_available_memory_gb=$(echo "scale=2; $total_available_memory / 1024" \| bc)

	<!doctype html>
	<html lang="pt-br">
	<head>

	<!-- Required meta tags -->
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

	<!-- CSRF Token -->
	<meta name="csrf-token" content="{{ csrf_token() }}">

	Author: https://blog.programster.org/creating-phar-files

	I write lots of helper scripts to do everyday tasks on my computer. These usually start out as BASH scripts, but quite often turn into PHP scripts/tools as they get more complex. For example, I use a PHP CLI tool for a personal password manager.

	Sometimes a script turn into a "tool" that requires a couple of classes, so I stick them into a folder and have an external BASH script in my $PATH that calls the folders "entrypoint". However, wouldn't it be great if I could just package up the entire folder into a single executable file, much like Java's JAR. This is where the PHAR comes in.

	If you use PHP you probably use a phar file every day in the form of composer. I had never bothered to learn how to create these files before because I assumed it would be hard, but it's actually easier than I could have believed.

	Steps
	Simply create a folder for your project, before creating a folder within there called "app" for your application's source code.

	#!/bin/bash -xe
	# Verifies the connectivity and validity of the objects in the database
	git fsck --full

	# Manage reflog information
	git reflog expire --expire=now --all

	# Pack unpacked objects in a repository
	git repack -a -d -l

	An Article by Hynek Schlawack all credits goes to him!
	https://hynek.me/articles/docker-signals/

	Why Your Dockerized Application Isn’t Receiving Signals - 19 June 2017

	Proper cleanup when terminating your application isn’t less important when it’s running inside of a Docker container.
	Although it only comes down to making sure signals reach your application and handling them, there’s a bunch of
	things that can go wrong.

	In principle it’s really simple: when you – or your cluster management tool – run docker stop, Docker sends a

	# Changed to use content-type flag instead of header: -H 'Content-Type: application/json'
	siege -c50 -t60S --content-type "application/json" 'http://domain.com/path/to/json.php POST {"ids": ["1","2","3"]}'

	~$ cat /etc/nginx/conf.d/default.conf
	server {
	listen 80;
	listen [::]:80;
	# listen 443 ssl default_server;
	# listen [::]:443 ssl default_server;
	server_name _;
	root /var/www;
	index /index.php;

	<?php
	declare(ticks = 1);

	function handleExit($signal)
	{
	error_log("Caught a $signal signal, a worker process exiting\n", 3, './error-child-log');
	exit(1);
	}

	pcntl_signal(SIGTERM, 'handleExit');

	<?php

	/* set the HTTP_ORIGIN to the requester origin if empty */
	if( isset( $_SERVER['HTTP_ORIGIN'] ) && $_SERVER['HTTP_ORIGIN'] != '' )
	{

	header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
	header('Access-Control-Allow-Credentials: true');
	header('Access-Control-Max-Age: 0'); // cache for 0 day