Cloud-Based Application Deployment

Cloud Deployment Models

• Public Cloud
  • Suitable for applications accessible by anyone on the internet.
• Private Cloud
  • Ideal for internal-use-only applications.
  • Hosted in a virtualized local data center.
• Hybrid Cloud
  • Combines both public and private clouds to meet varied application needs.

Cloud Service Models

Software as a Service (SaaS)

• Provides software on demand.
• Applications are accessed via login on a browser.
• Managed by third-party providers; no local installation needed.
• Centralized management for application and data.
• Example: Google Mail, Office 365.

Infrastructure as a Service (IaaS)

• Also known as Hardware as a Service (HaaS).
• Offers computing resources for deploying custom applications.
• Users manage their own software, data, and upgrades.
• Provides more control over data access and security.
• Example: Web service providers offering server time.

Platform as a Service (PaaS)

• Provides tools for application development.
• Users customize applications to their specifications.
• Platform provider manages underlying infrastructure.
• Example: Salesforce.com.

Cloud Responsibility Matrix

• On-Prem: Full customer responsibility from data to physical data center.
• IaaS: Cloud provider manages physical infrastructure, customer handles software and data.
• PaaS: Shared management between provider and customer for infrastructure, customer holds responsibility for applications and data.
• SaaS: Provider responsible for most application management, customer handles remaining aspects like accounts.

Choosing the Right Cloud Model

• Depends on desired infrastructure and level of management responsibility.
• Evaluate based on application needs and security requirements.