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Other Services DVA

Links: 102 AWS DVA Index

AppSync

  • AppSync is a managed service that uses GraphQL
    • Single endpoint.
  • GraphQL makes it easy for applications to get exactly the data they need.
  • This includes combining data from one or more sources
    • NoSQL data stores, Relational databases, HTTP APIs, etc
    • Integrates with DynamoDB, Aurora, Elasticsearch & others
    • Custom sources with AWS Lambda
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  • Retrieve data in real-time with WebSocket or MQTT on WebSocket
  • For mobile apps: local data access & data synchronisation.
    • Replacing cognito sync
  • It all starts with uploading one GraphQL schema
Keywords for AppSync data synchronisation, mobile, graphql api, real time updates, WebSocket, offline.
  • Difference between cognito sync and AppSync:
    • Cognito sync is not real time.

Security

  • There are four ways you can authorise applications to interact with your AWS AppSync GraphQL API:
    • API_KEY: like we have in API Gateway
    • AWS_IAM: IAM users roles / cross-account access
    • OPENID_CONNECT: OpenID Connect provider / JSON Web Token
    • AMAZON_COGNITO_USER_POOLS
  • For custom domain & HTTPS, use CloudFront in front of AppSync

DataSync

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Amplify

  • It is used to create mobile and web applications.
  • It can be thought of as ElasticBeanStalk for mobile and web applications.
  • It includes must-have features such as data storage, authentication, storage, and machine-learning, all powered by AWS services
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    • Front-end libraries with ready-to-use components for React.js, Vue, Javascript, iOS, Android, Flutter, etc
  • Incorporates AWS best practices to for reliability, security, scalability
  • Build and deploy with the Amplify CLI or Amplify Studio
  • Components:
    • Amplify Studio: Visually build a full-stack app, both front-end UI and a backend.
    • Amplify CLI: Configure an Amplify backend with a guided CLI workflow
    • Amplify Libraries: Connect your app to existing AWS Services (Cognito, S3 and more)
    • Amplify Hosting: A Host secure, reliable, fast web apps or websites via the AWS content delivery network.
Amplify deployments are powered by CloudFormation

Important features

  • Authentication: amplify add auth
    • Leverages Amazon Cognito
    • You get all the features provided by cognito
  • Data store: amplify add api
    • Leverages AppSync and DynamoDB
    • Work with local data and have automatic synchronisation to the cloud without complex code
    • Powered by GraphQL
    • Offline and real-time capabilities
    • Visual data modelling with the help of Amplify Studio
  • Hosting: amplify add hosting
    • Competes with services like netlify and vercel.
    • CI/CD
    • Custom domain name
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ACM (AWS Certificate Manager)

  • Let's you easily provision, manage, and deploy SSL/TLS Certificates
  • Used to provide in-flight encryption for websites (HTTPS)
  • Supports both public and private TLS certificates
  • Automatic TLS certificate renewal
  • Integrations with (load TLS certificates on)
    • Elastic Load Balancers
    • CloudFront Distributions
    • APIs on API Gateway
  • A public certificate is used for an internet-facing application.
  • DNS validation should be used when automatic renewal is required.

Difference between ACM and IAM for certificates

  • AWS Certificate Manager (ACM) is the preferred tool to provision, manage, and deploy server certificates.
  • In a supported Region, you can use ACM to manage server certificates from the console or programmatically.
  • IAM is used as a certificate manager only when you must support HTTPS connections in a Region that is not supported by ACM.
  • IAM supports all regions.
IAM supports deploying server certificates in all Regions, but you must obtain your certificate from an external provider for use with AWS.

You cannot upload an ACM certificate to IAM.

CloudMap

  • A fully managed resource discovery service
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    • Automatically update from v1 to v2 without any manual code change
  • Creates a map of the backend services/resources that your applications depend on
  • You register your application components, their locations, attributes, and health status with AWS Cloud Map
  • Integrated health checking (stop sending traffic to unhealthy endpoints)
  • Your applications can query AWS Cloud Map using AWS SDK, API, or DNS

FIS (Fault Injection Simulator)

  • A fully managed service for running fault injection experiments on AWS workloads
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  • Based on chaos engineering.
  • Helps you uncover hidden bugs and performance bottlenecks
  • Use pre-built templates that generate the desired disruptions

Last updated: 2023-03-18