Briana.Augenreich

@capitalone.com

Cynthia.Carter

@capitalone.com

Level Set: What is the cloud?

Getting Hands-on: Build Infrastructure to Host your Website.

Powerful Tools to Research Next

Passing the Interview

Feel comfortable exploring/developing in the Cloud!

Today's Goals

Agenda

What is Cloud Computing?

Network of Remote Servers
Platform to help build scalable applications
Fast access to low cost resources over the internet

What are the benefits?

Cost! Pay for infrastructure as needed

Scale up to balance load

Low risk- great for experiments (hello start-up)

Deploy applications in multiple regions

Which is why so many companies run on AWS!

So Let's Deploy Our Website on AWS too

https://aws.amazon.com/console/

https://932727539571.signin.aws.amazon.com/console

https://amzn.to/2IEhr4e

Non-Functional Requirements?

Resources Could Use:

https://d0.awsstatic.com/whitepapers/aws-overview.pdf

Architecture Diagram

Regions vs Availability Zones

Region

Separate geographical area

Ex: California & Oregon (US West Regions)

Availability Zone (AZ)

Isolated location within a region

How does this help our NFRs?

Architecture Diagram

Let's talk security !

All resources are deny by default

Security Groups open up our firewall

Allow access to our resources

Review the course-sg

Create Security Group

Firewall controlling traffic around our database and web servers

Architecture Diagram

Configure the Database

RDS Instance: Relational Database Service

Relational Database
Resizable capacity
MySQL, PostgreSQL, etc.

Object Storage
Pay for storage use
Glacier for long-term archive
Good for big data analytics, backup, and other applications

S3

RDS

Create RDS Instance

Architecture Diagram

Automagically deploy a web application

Configure Elastic Beanstalk

Automagically deploy a web application

Review our environment

Review sample php app

Configure DB

Configure Autoscaling Group

Modify Security Group

What did we just do?

Elastic Compute Cloud (EC2)

Scalable compute capacity in the cloud

AKA our servers

Variety of sizes and optimizations

Secured by our security group

The Security Group

Firewall controlling traffic around the application.

Architecture Diagram

Elastic Load Balancer (ELB)

Distributes application traffic across multiple EC2s.

Also secured by our security group

Helps meet business requirements of:

Fault tolerant
Scalable to help app performance
Availability

Architecture Diagram

Auto Scaling Group

Launch or terminate EC2 instances based off of policy.

Maintain application performance by adding and removing EC2s based on CPU, requests, time of day
Decrease cost by "turning off the lights"
Cross region availability

Deploy our app

download application from http://bit.ly/2FhRupO and deploy to beanstalk environment

index.php

<?php

require __DIR__ . '/../src/app.php';

app.php

db-connect.php

<?php

require __DIR__ . '/../vendor/autoload.php';
require __DIR__ . '/db-connect.php';

<?php 
  define('DB_NAME', $_SERVER['RDS_DB_NAME']);
  define('DB_USER', $_SERVER['RDS_USERNAME']);
  define('DB_PASSWORD', $_SERVER['RDS_PASSWORD']);
  define('DB_HOST', $_SERVER['RDS_HOSTNAME']);
  define('DB_TABLE', 'urler');
?>

/ Setup the application
$app = new Application();
$app->register(new TwigServiceProvider, array(
    'twig.path' => __DIR__ . '/templates',
));

// Setup the database
$app['db.table'] = DB_TABLE;
$app['db.dsn'] = 'mysql:dbname=' . DB_NAME . ';host=' . DB_HOST;
$app['db'] = $app->share(function ($app) {
    return new PDO($app['db.dsn'], DB_USER, DB_PASSWORD);
});

// Handle the index page
$app->match('/', function () use ($app) {
    $query = $app['db']->prepare("SELECT message, author FROM {$app['db.table']}");
    $thoughts = $query->execute() ? $query->fetchAll(PDO::FETCH_ASSOC) : array();

    return $app['twig']->render('index.twig', array(
        'title'    => 'Your Thoughts',
        'thoughts' => $thoughts,
    ));
});

// Handle the add page
$app->match('/add', function (Request $request) use ($app) {
    $alert = null;
    // If the form was submitted, process the input
    if ('POST' == $request->getMethod()) {
        try {
            // Make sure the photo was uploaded without error
            $message = $request->request->get('thoughtMessage');
            $author = $request->request->get('thoughtAuthor');
            if ($message && $author && strlen($author) < 64) {
                // Save the thought record to the database
                $sql = "INSERT INTO {$app['db.table']} (message, author) VALUES (:message, :author)";
                $query = $app['db']->prepare($sql);
                $data = array(
                    ':message' => $message,
                    ':author'  => $author,
                );
                if (!$query->execute($data)) {
                    throw new \RuntimeException('Saving your thought to the database failed.');
                }
            } else {
                throw new \InvalidArgumentException('Sorry, The format of your thought was not valid.');
            }

            // Display a success message
            $alert = array('type' => 'success', 'message' => 'Thank you for sharing your thought.');
        } catch (Exception $e) {
            // Display an error message
            $alert = array('type' => 'error', 'message' => $e->getMessage());
        }
    }

    return $app['twig']->render('add.twig', array(
        'title' => 'Share Your Thought!',
        'alert' => $alert,
    ));
});

$app->run();