What is the cloud? DevOps approach Basic AWS overview - Cloud .pdf · 14 Cloud & AWS Essentials EBS (Elastic Block Store) and snapshots •An EBS is an highly available and reliable

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Cloud & AWS EssentialsAgenda

• Introduction

• What is the cloud?

• DevOps approach

• Basic AWS overview

⚫ VPC

⚫ EC2 and EBS

⚫ S3

⚫ RDS

• Hands-on exercise

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Cloud & AWS EssentialsWhat is the cloud?

Cloud computing it is a model for enabling ubiquitous,

on-demand access to a shared pool of

configurable computing resources

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Cloud & AWS EssentialsCloud characteristics

•On demand self service

•Anywhere, anytime

•Quick resources provisioning

•Elasticity

•Pay as you go

•Automation

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Cloud & AWS EssentialsWhat are the benefits?

Costs saving

Scaling up

Rapid delivery

High Availability

Fault Tolerance

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Cloud & AWS EssentialsCloud models

SaaS

PaaS

IaaS

• Software as a Service (SaaS)

⚫ Usually run from a web browser

⚫ Pay per user model

⚫ No worry about installation and setup

• Platform as a Service (PaaS)

⚫ Offers tools to deploy and distribute apps

⚫ Limited setup effort

• Infrastructure as a Service (IaaS)

⚫ Automated IT infrastructure

⚫ Pay on demand model

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Cloud & AWS EssentialsCloud models

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Cloud & AWS EssentialsInfrastructure paradigms: Snowflakes vs Phoenix

Mutable infrastructure

• Every server is unique and inimitable

• Every server is lovingly hand raised and cared for, leading to a unique

environment

• When a server goes down everyone gets upset

Immutable infrastructure

• Always built from scratch and easy to recreate (“rise from the ashes”)

via automated procedure

• If a server goes down, it is promptly replaced by another identical one

• No manual updates / changes

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Cloud & AWS EssentialsDevOps approach (or how to embrace the cloud efficiently)

What is DevOps?

• It’s a culture and a mindset promoting a closer

collaboration and tighter integration between teams

that historically worked as separated silos

• Set of practices and tools to automate the processes

between software development and IT teams

• Software could then be built, tested and released

faster and more reliably

DEV OPS

Infrastructure as Code (IaC)

an approach to infrastructure automation based on well-known practices

taken from software development

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Cloud & AWS EssentialsWhat is AWS?

Amazon Web Services is a

cloud services provider

(IaaS)

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Cloud & AWS EssentialsAWS Global Infrastructure

• Region. Separate, independent geographic area grouping

AWS resources, and containing multiple Availability Zones

• Availability Zone. It contains a physical data-center. AZs

within the same region are connected via low latency links

• 18 Regions

• 55 Availability Zones

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Cloud & AWS EssentialsVPC (Virtual Private Cloud)

• A VPC is a private, isolated section where it is

possible to place AWS resources

• A VPC can spawn across several different AZs

• A VPC defines also the networking

configuration, such as:

⚫ Subnets

⚫ Route tables

⚫ Internet Gateway

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Cloud & AWS EssentialsEC2 (Elastic Compute Cloud)

• An EC2 instance is essentially a (virtual) machine

• Instance types define the number of cores and amount

of memory

• An instance is created from an AMI (Amazon Machine

Image)

• Traffic can be controlled through security group (a sort

of virtual firewall)

• An instance can be created, stopped or terminated

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Cloud & AWS EssentialsEC2 (Elastic Compute Cloud)

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Cloud & AWS EssentialsEBS (Elastic Block Store) and snapshots

• An EBS is an highly available and reliable storage volume that

can be attached to a running instance (in the same AZ)

• EBS is recommended for quick data access and when long-term

persistence is required. Different kind of volumes are available

• EBS volumes can be encrypted

• EBS can be backed up by taking a snapshot

• It is possible to expand the size and performance of an EBS

volume on-demand

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Cloud & AWS EssentialsS3 (Simple Storage Service)

• S3 is an online bulk storage, accessible from any device

to store and retrieve any amount of data (it’s like

DropBox or Google Drive)

• S3 is a region-based resource (can be accessed by

many different VPCs), highly available and cheap

• 11 9’s of reliability (99.99999999999%)

• S3 is also used internally to store EBS snapshots and

AMIs

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Cloud & AWS EssentialsRDS (Relational Database Service)

• Web service that makes it easier to setup, operate and

scale a relation database in the cloud

• Possibility to create Single and Multi AZ for high

availability

• Many different kind of DBMS supported

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Q&A

Cloud & AWS Essentials

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Cloud & AWS Essentials

1) Login to Amazon AWS console:

aws.amazon.com -> "Sign In to the Console"

2) Go to the S3 service:

3) Instructions are available in folder "iongroup-training-lab/trainee_<identifier>"

Hands-on exercise

Field Value

Account ID or alias 755957107301

IAM user name trainee_<identifier_assigned_by_the_relator>

Password 42

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Cloud & AWS EssentialsContacts

• Andrea Fasano - [email protected]

• Marco Martinucci – [email protected]