Cloud computing

Cloud computing

1. Cloud model

   • Public
     • N customers on the same data center
   • Private
     • Datacenter dedicated to one customer
   • Hybrid
     • Mixed. Part on public, part on private. Balance cost or security requirement

2. Advantages

   • High availability
     • Resources are available when they need. Uptime garantes.
   • Scalability
     • Vertical / Scaling up
       • Add more power to a single computer. More processing.
     • Horizontal / Scaling out
       • Add more computer, distributing the workload across multiples services.
     • Adjust resources to meet demand
   • Reliability
     • Recovery from failure
   • Predictability
     • Performance
       • Handle a certain level of workload or traffic and still respond quickly and efficiently
     • Cost
       • Monitor resources and ensure you are using efficiently
     • Ability to forecast and plan for future resource requirement based on historical data and analytics. Also base on workload pattern, user behaviour and seasonal trends.
   • Security
     • Protection against cyber threats
   • Simplified compliance
     • Ensure that all deploys resources meet corporate standards and goverment regulatory requirements
   • Centralized governance
     • Manage and governing resources, such as user accounts, access control and data policies
   • Manageability
     • Manage cloud resources and clod enviroments

3. Shared responsability model

   • Client
     • Information and data
     • Connects devices
     • Accounts and identity
   • Provider
     • Physical host
     • Physical network
     • Physical data center
   • Some responsability depends of the cloud service type
     • Operational system
     • Network control
     • Applications
     • Directory infra

4. Cloud services types

   • IaaS
     • Infrastructure as a service
     • Most flexible. Cost effective.
   • PaaS
     • Platform as a service
     • The platform typically includes tools, libraries, and frameworks for developing applications
   • SaaS
     • Software as a service
     • The cloud provider offers software applications that can be accessed and used over the internet

5. Physical infrastructure

   • Region
     • Region pairs
       • Paired "closed" regions to allow replication of resources
     • Physical/Geographical location
   • Availability zone
     • Separate datacenters in the same region

6. Manage infrastructure

   • Resource groups
     • Grouping resources. A resource is the basic building block of Azure
   • Subscription
     • Unit of management. The group of permissions.

7. Azure services

   • Azure Compute and Networking
     • Virtual machines
     • Containers
     • Virtual network
     • VPN
     • Load balancer
     • Firewall
     • DNS
     • Azure Functions
   • Azure Storage
     • Blob storage
     • File storage
     • Queue storage
     • Table storage
   • Azure identity, access and security
     • AD (Active Directory)

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