neerajkumar161/aws-services

Services like EC2, Lambda, S3, DynamoDB and Route 53

AWS - Amazon Web Service that provides multiple cloud services so you don't need to manage on your own.

EC2 - Elastic Computing Cloud or Infrastucture as a Service

• A cloud computer provided by the AWS, so we run anything on the platform without any need to purchase any h/w. Means Virtual Computer on AWS. You can setup your servers, on anything on it.
• Capabilities
  • Renting Virtual machines [EC2]
  • Store data on virtual drives [EBS]
  • Distributing load across machines [ELB]
  • Scaling the services using an auto-scaling group.
• EC2 Sizing and Configurations options:
• OS - Linux or Windows
• CPU, RAM, Storage Space, Network card, Firewall rules, Bootstrap Script (configure at first launch)
• 5 types of EC2 instances available.

LAMBDA - Functions as a Service (FaaS), aks Serverless.

• Why we need to purchase complete server while we can run functions to do some tasks on the cloud.
• Simply upload your code and choose event that should decide when should your code runs.
• Traffic Scaling and Networking are all things are that happen entirely in the backgroud.
• And unlike a complete server, you pay for as per request and computing time that you use.

S3 - Simple Storage Service. First product offered by AWS

• To upload files on the AWS.
• Any type of file or object can be store on s3.
• More than a storage
• Data Ingestion Pipeline -> To consume Stock Market Data
  • Some Service -> Dump to S3
  • Contains S3 event so you can notify things using for example AWS lambda
  • Event trigger from s3 bucket -> invoke the Lambda function. - Analytics and Dashboarding - Event Driven Architectures ->
  • Cutomer -> Image Upload to S3 bucket -> use s3 PUT event -> invoke the AWS lambda function to things on image -> Notify user using GraphQL service provided by AWS Appsync

DynamoDB - Document Database or NoSQL databse.

• https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Introduction.html
• Very easy to scale horizontally.
• Scales, Fast and Cheap. [Provides fast read performance]
• No Joins and Limited Queries.
• Fully Managed NoSQL database service.
• High availability and durability

Amazon Route 53 - DNS service provided by AWS with 100% availability.

• DNS is like a phonebook for the internet, that translate your url address to IP address.
• Distributed nature of the service.
• Can be used to link other AWS Services like S3, EC2, Lambda.

• Key concepts:
  • Domain Registration: Can purchase and manage domain name in Route 53
  • DNS Routing: Translate human redable url to IP address.
  • Health Checks: Router 53 can monitor the health of your resources and route traffic only to healthy instances.
  • Traffic Policies: Create traffic policies for complex routing configurations.
• Basic Components:
  • Hosted zones: A container for records, defines where you want to route traffic for a specific domain.
  • Record Sets: Individual DNS records within hosted zones that specify how you want to route traffic of a particular domain or subdomain.
• Example, you have domain www.neerajkumar.com and one ec2 instance for a node server or web application.
• Now using Router 53, when user goes to www.neerajkumar.com it should redirect to ec2 nodejs instance,
• So using Route 53, we can create records set to redirect to ec2 instance.
• we can create alias for sub domain as well. eg. users.neerajkumar161.com