Before the Exam

Note

Types of Cloud Computing

  • Saas(Software as a Service)
    • e.g. Google Workspace/ Office 365…
    • Product provided and run by service provider
    • It just works and remains available
    • You don’t need to worry about the infrastructure
  • Paas(Platform as a Service)
    • e.g. Google App Engine
    • You can run your own code on the service provider’s infrastructure
    • You don’t need to worry about the infrastructure like provisioning, configuring or understanding the underlying hardware or OS
  • IaaS(Infrastructure as a Service)
    • e.g. Google Cloud
    • Basic blocks of cloud computing, providing access to
    • You can run your own code on the service provider’s infrastructure
    • You need to worry about the IT staff, data centers and hardware

Shared Responsibility Model

If you can configure or store it then you are responsible for it.

IaaS PaaS SaaS FaaS

IaaS

This means you are basically responsible for everything

  • Compute Engine - Bare Metal

    • 裸机服务器是仅供一个消费者或租户使用的物理计算机服务器

    • Customer
      • Host OS Configuration
      • Hypervisor
    • Google
      • Physical Hardware
  • Compute Engine - Virtual Machine
    • Customer
      • The Guest OS
      • Container Runtime
        • You can check the box on if you want a VM to have containerization, and that will make it Google’s responsibility, but you can install it very much yourself which will make it your responsibility.
    • Google
      • Hypervisor, Physical Hardware
  • Containers - GKE(Google Kubernetes Engine)
    • Customer
      • Container Configuration
      • Deployment of Containers
      • Storage
    • Google
      • OS, Hypervisor, Physical Hardware

PaaS

  • Managed Platform - App Engine
    • Customer
      • Application Code
      • Environment Configuration
      • Deployment strategy
      • Configuration of services related to the application
    • Google
      • Server, OS, Networking, Storage, Security

SaaS

  • Word Processor - Google Docs
    • Customer
      • Document content
      • Management of files
      • Configuration of sharing access control
    • Google
      • Server, OS, Networking, Storage, Security

FaaS

  • Functions - Cloud Functions
    • Customer
      • Upload code
    • Google
      • Deployment, Container Runtime, Networking, Storage, Security, Physical Hardware(Almost everything)
  • Serverless Container - Cloud Run

Dedicate Host - Sole-tenant Node

Sole-tenant Node: A node that is dedicated to a single customer, you are the only person on that physical machine.

Conclusion

\ Bare Metal Dedicate Host Virtual Machine Container Function
Code √ √ √ √ √
App Container √ √ √ √ x
Runtime √ √ √ x x
OS √ √ √ x x
Virtualization √ x x x x

Cloud Computing Deployment Models

  • Public Cloud
    • Everything built on the Cloud Provider’s infrastructure, also known as Cloud-Native.
    • [ VM + DB sitting in a subnet ] sitting in a VPC provided by the Cloud Provider
  • Private Cloud
    • Everything built on company’s data centers, also known as On-Premise.
    • You may need something like OpenStack to manage the infrastructure and make it look like a cloud.