Identifying the Right Service Type Based on Use Case

Key Skill

• Identify a service type based on use case.

Types of Services

1. On-Premises
2. Infrastructure as a Service (IaaS)
   • Virtual Machines (VM)
3. Platform as a Service (PaaS)
   • Different types available
4. Software as a Service (SaaS)
   • Complete business function delivered

Decision Making on Service Type

• SaaS Preference

  • Preferred when a business function can be delivered fully.
  • Example: For messaging solutions like email and collaboration, use services like Microsoft 365 instead of installing Exchange and SharePoint.

• Virtual Machines (IaaS)

  • Use when needing direct OS access and full control.
  • Suitable for lifting and shifting domain controllers or file servers to the cloud.

• Azure App Services (PaaS)

  • Ideal for web services to minimize responsibility.
  • Example: Running Apache Tomcat or IIS on Azure.

• Azure Container Instances

  • Suitable for running a single Docker image.

• Azure Kubernetes Service (AKS)

  • Best for microservice architectures that need:
    • Auto-scale capabilities
    • Rich networking integration
    • Larger scale deployments
  • Considered the gold standard in container orchestration.

Serverless Solutions

• Azure Functions

  • Used for executing code in response to specific triggers (e.g., file written to storage or a message to a queue).

• Logic Apps

  • No-code solution for designing workflows based on events (e.g., tweets, files received via FTP).
  • Involves dragging and dropping components for logical flows.

Conclusion

• Different services align with specific workloads and needs.
• Selecting the right service type enhances efficiency and minimizes unnecessary responsibilities.