Cloud Computing Tutorial Notes

Introduction

• Speaker: Samuel, Multi-platform Cloud Architect and Trainer at Simply Learn.
• Topics Covered:
  • Purpose and necessity of Cloud Computing
  • Definition of Cloud Computing
  • Types of Cloud Computing
  • Dominant Cloud Providers
  • Lifecycle of a Cloud Computing solution
  • Implementation of Cloud Computing in AWS
  • Demo using EC2 and S3

Why Cloud Computing Was Needed

• Problem Solved by Cloud Computing:
  • High costs of on-premises infrastructure.
  • Lack of flexibility and scalability in traditional data centers.

Key Differences Between Cloud and On-Premises

• Billing Model:
  • Cloud: Pay-as-you-go; less usage = less cost.
  • On-Premises: Upfront costs + ongoing operational costs.
• Space Requirements:
  • Cloud: No physical space required for servers.
  • On-Premises: Large space needed for hardware.
• Management Needs:
  • Cloud: Managed by provider; simpler management interface.
  • On-Premises: Requires dedicated IT team.
• Data Security:
  • Cloud: Higher security standards due to provider investments.
  • On-Premises: Security is often limited by budget.
• Data Recovery:
  • Cloud: Advanced recovery options available.
  • On-Premises: Limited focus and capability.
• Flexibility:
  • Cloud: Easily scale up or down; migrate environments quickly.
  • On-Premises: Difficult to restructure.
• Updates:
  • Cloud: Automatic updates.
  • On-Premises: Manual updates required.
• Global Collaboration:
  • Cloud: Easy data sharing with global teams.
  • On-Premises: Difficult to access data remotely.
• Implementation Time:
  • Cloud: Deploy in weeks.
  • On-Premises: Can take years.

Understanding Cloud Computing

• Definition:
  • Delivering computing services (like storage, processing) over the internet on a pay-as-you-go basis.
• Access:
  • Data stored in the cloud can be accessed from anywhere with an internet connection.

Types of Cloud Computing

Based on Deployment Models

1. Public Cloud:
   • Available to the general public; owned by cloud providers.
   • Example: AWS, Azure.
2. Private Cloud:
   • Exclusively operated for a single organization; can be on-premises or off-premises.
   • Example: VMware, AWS Private Cloud.
3. Hybrid Cloud:
   • Combination of public and private clouds.
   • Allows integration with existing on-premises data centers.

Based on Service Models

1. Infrastructure as a Service (IaaS):
   • Basic computing infrastructure; pay-for-what-you-use.
   • Example: AWS EC2.
2. Platform as a Service (PaaS):
   • Platform for developing/testing applications without managing underlying infrastructure.
   • Example: AWS Elastic Beanstalk.
3. Software as a Service (SaaS):
   • Software hosted and managed by the vendor; accessed via internet.
   • Example: Google Workspace.

Key Cloud Providers

• Amazon Web Services (AWS):
  • Comprehensive cloud services provider; includes IaaS, PaaS, SaaS.
• Microsoft Azure:
  • Offers a range of cloud services for building, deploying applications.
• IBM Cloud:
  • Provides public, private, and hybrid cloud solutions.
• Google Cloud Platform:
  • Offers services for computing, data storage, analytics.
• DigitalOcean:
  • Focused on simplicity for developers to deploy applications.

Cloud Computing in AWS

• AWS Overview:
  • Cloud computing service provided by Amazon.
  • Key offering: IaaS with pay-as-you-go subscriptions.

Lifecycle of a Cloud Computing Solution

1. Understanding Requirements:
2. Define Hardware:
   • Select appropriate compute services (e.g., EC2, Lambda).
3. Define Storage:
   • Identify storage services (e.g., S3 for backup, Glacier for archival).
4. Define Network:
   • Choose network services for secure data delivery.
5. Set Up Security Services:
   • IAM for authentication; KMS for encryption.
6. Deployment & Monitoring:
   • Use tools like CloudWatch, Auto Scaling, CloudFormation.
7. Testing & Analytics:
   • Tools for building, testing, deploying code.
   • Use analytics services like Athena or EMR.

Demo: Using EC2 & S3

• Create AWS Account:
• Create S3 Bucket:
  • Store files that EC2 will access.
• Create EC2 Instance:
  • Virtual machine in the cloud; install web server.
• Synchronize S3 with EC2:
  • Use aws s3 sync command to pull files.

Conclusion

• Covered basics of cloud computing, types, dominant providers, AWS lifecycle, and practical demo using EC2 & S3.
• Next Steps: Explore more about cloud computing in later videos.