Describe Cloud Concepts Flashcards
What is CapEx
Purchasing an asset upfront (typically on premises)
What is OpEx
Purchasing a resource or service as we use it (ie. for the cloud), consumption based
Infrastructure as a Service - Responsibilities of Provider/Customer
Responsibility of Azure:
- H/V VM
- Compute
- Network
- Storage
Responsibility of Customer: (Azure helps with tooling)
- Data
- Application
- Runtime
- OS
examples: VMs
Platform as a Service- Responsibilities of Provider/Customer
Responsibility of Azure:
- Runtime
- OS
- H/V VM
- Compute
- Network
- Storage
Responsibility of Customer: (Azure helps with tooling)
- Data
- Application
examples: Serverless (Functions, Logic Apps)
Software as a Service- Responsibilities of Provider/Customer
Delivery of business value, application, etc. The customer is not responsible for anything except using the product.
examples: Microsoft 365
Public Cloud
- Opex
- Limitless
- Many Regions
- Many Services
- Over the internet
Hybrid Cloud
public and private cloud
- seamless
- Use Azure Arc
Private Cloud
- Capex
- Hypervisor
Reliability
- Auto Healing
- Storage (x3)
- Auto Scale
- SLA
- Design for failure (multi-region)
- Monitor
Predictability
- SKU (defined compute, memory, IOps, etc.)
- Behavior (pricing, tools)
- Use templates (Json, Terraform, etc.)
- Automation (Devops, pipelines, CI/CD)
Region
Multiple datacenters in a latency envelope
- 2 ms latency window
Special regions - sovereign regions (US Govt cloud)
Choosing regions
- Performance
- Regulatory
- Disaster Recovery
Region pairs
- Disaster Recovery
- Two regions hundreds of miles apart
- Used for resiliency (updates are applied to only one region first)
Availability Zones
- Independent power, cooling, networking in separate data centers
- Three Availability Zones per Region
- Services can be Zonal or Zone redundant
Resource Groups
- Multiple regions
- Multiple resources
- Shared lifecycles
- Role based access control
- Policy
- Budget
- Metadata (tagging)
- One resource is in one resource group
- Flat structure (can’t have a resource group in another one)
Subscription
Base unit of an agreement between the customer and Microsoft
- Billing boundary
- Has one and only one Azure AD Tenant
- Budget
- Policy
- Resource Group inherits the subscription metadata
- Limits (soft vs. hard limits)
Management Groups
One Azure AD Tenant root with a hierarchy of groups inherited down
- Access Control
- Policy
- Budget
Azure Resource Manager
Everything in Azure is a resource
- Access control
- tags
ARM is an endpoint to the resource (portal, powershell, az cli, REST, API, etc.)
Everything in Azure is stored in JSON ARM template(a declarative template) or BICEP (human friendly translated to JSON)
Azure Arc
Extends the Azure control plane to services outside of Azure (on prem, other clouds, etc.)
Arc-enabled server
- Runs inside the OS
- Enables the resource to be arc enabled
