Daily Dev Tracker

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Day 1 - Azure Learning Plan

Cloud Fundamentals

Introduction to Cloud Computing

• Definition and benefits of cloud computing A service that is available over the internet, allowing users to access computing resources on-demand.

Types of Cloud Deployments

• Private Cloud: Cloud infrastructure operated solely for a single organization.
  • Maintaining control over data and security.
  • Customization to meet specific business needs.
• Public Cloud: Cloud services offered over the public internet and available to anyone.
  • Cost-effective and scalable.
  • Managed by third-party providers.
  • Scale without changing underlying infrastructure.
  • can access resources from anywhere with an internet connection.
  • cost saving because cloud services are shared between multiple users.
• Hybrid Cloud: A combination of private and public clouds, allowing data and applications to be shared between them.
  • Flexibility to choose optimal deployment for each workload.
  • Enhanced security for sensitive data.
  • Cost efficiency by leveraging public cloud resources when needed.
  • Cons complexity in management and integration.

Compare capex and opex in different cloud models.

• Capital Expenditure (CapEx): Upfront costs for physical hardware and infrastructure in traditional IT setups.
• Operational Expenditure (OpEx): Ongoing costs for cloud services, typically billed based on usage, allowing for more predictable budgeting and reduced upfront investment.

Consumption-based pricing model: Pay only for the resources you use, allowing for cost efficiency and scalability, better cost prediction, and reduced upfront investment.

Cloud Service Models

• Types of cloud services: IaaS, PaaS, SaaS
  • IaaS (Infrastructure as a Service): Provides virtualized computing resources over the internet. Most flexible
  • PaaS (Platform as a Service): Provides a platform allowing customers to develop, run, and manage applications. Focus on application development without worrying about underlying infrastructure.
  • SaaS (Software as a Service): Delivers software applications over the internet, on a subscription basis. Pay as you go model, ready to use applications.

Cloud Benifits

• High Availability
• Elasticity
• Scalability
  • vertical scaling - adding more power (CPU, RAM) to an existing machine.
  • horizontal scaling - adding more machines to handle increased load.
• Reliability
• Predicibility
• Security
• Governance - policies and rules to manage cloud resources effectively, production standards, compliance, and cost management.
• Managability

Related Concepts

• Virtualization: Creating virtual versions of resources like servers or storage to maximize hardware use.
  Example: Running several virtual servers on one physical machine.

• Hypervisor: Software that enables virtualization by running and managing virtual machines.
  Example: VMware ESXi, Microsoft Hyper-V.

• API (Application Programming Interface): A set of rules for software to communicate and interact.
  Example: Using REST APIs to automate cloud resource management.

• Regions: Physical locations around the world where cloud providers host data centers.
  Example: Azure “East US” or “West Europe”.

• Availability Zones: Separate, isolated locations within a region for higher redundancy and reliability.
  Example: Deploying resources across zones to ensure uptime if one fails.

• Scalability: The ability to grow or shrink resources to meet demand.
  Example: Adding servers during peak usage.

• Elasticity: Automatically adjusting resources based on real-time demand.
  Example: Auto-scaling web servers up or down as traffic changes.

• High Availability: Designing systems to minimize downtime and ensure continuous service.
  Example: Using redundant servers and load balancers.

• Disaster Recovery: Plans and tools to restore data and services after failures or disasters.
  Example: Backing up data to another region for quick recovery.

• Agility: Rapidly adapting to changes and deploying new solutions.
  Example: Rolling out new app features in hours instead of weeks.