AWS Fundamentals

Elastic Compute Cloud (EC2) Basics

S3 Basics

S3 101

• Global Storage Plataform - regional based/resilent
• S3 is a Public service, unlimited data & multi-user
• S3 can be accessed via
  • UI
  • CLI
  • API
  • HTTP
• S3 main elements:
  • Object
  • Buckets

S3 Objects

• S3 Object main two componentes
  • Key = think like the file name
  • Value =Content being stored
• S3 Objects size can be Zero byte to 5 TB
• Another components for an S Object
  • Vesion ID
  • Metadata
  • Access Control
  • Subresources

S3 Buckets

• S3 is a Global based services, however when you create an S3 Buckets you have to select an specific AWS region.
  • True
• The data inside a S3 Bucket has a primary home region
• Data never leaves that region, unless you configure it.
• S3 buckets Blast Radius = Region
• S3 Bucket names are Globally Unique
• An S3 Buckets could have unlimited objects
• S3 Buckets have flat structure, it not a file system with folders and subfolders
• Even the UI present the data in folders, it is a flat structure, what happen is that object keys are like this: /folder/Koala1.jpg
• folders are commonly reffered as prefixes of S3 objects

Summary

• Bucket names are globally unique
  • Yes
• S3 Bucket names limitations
  • 3-63 characters, all lower case, no underscores
  • Start with a lowercase letter or a number
  • Can’t be IP formated
• S3 Bucket quantity limitations
  • 100 soft bucket limits per AWS account
  • 1000 hard bucket limit per AWS account
• Unlimited object in bucket, 0 bytes to 5TB
• Key = Name, Value = Data

S3 Patterns and Anti-Patterns

• S3 is an object store - not file or block
• You CAN’T MOUNT an S3 bucket on Windows or Linux.
• Great for large scale data storage, distribution or upload
• Great of ‘offload’
• INPUT and/or OUTPUT to MANY AWS products
• S3 buckets are not public accessible by default

Cloud Formation Basics

The basics

• It uses templates writen in
  • YAML
  • JSON
• The only mandatory part of a template is:
  • A list of resources
• Description must directly follow AWSTemplateFormatVersion on a YAML Cloud formation template
• AWSTemplateFormat Version
  • the way that AWS allow for extending the standard over time
• Metadata, controls how the template will be shown on the UI
• Another elements of CloudFormation templates
  • Parameters, prompt user for information.
  • Mappings
  • Conditions
  • Transform
  • Outputs
• Resources in CloudFormation templates are logical resources
• A stack (or stacks) or logical resoureces is created from a teomplate, then converted to physical resources
• CloudFormation keeps sync between the stack and the physical resources

Route53 (R53) Fundamentals

• Global-based service
  • Globally Resillient
• 2 main services
  • Register Domains
  • Host Zones… managed nameservers
• Host Zones
  • Zone files in AW
  • Hosted in our managed name servers
  • Can be public or private (linked to VPC(s))
  • stores records (recorsets)
• AWS is the registar
• .COM, .ORG, .IO etc, TLD are the registry