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Migrating Applications to the Cloud with Azure
Migrating Applications to the Cloud with Azure

Migrating Applications to the Cloud with Azure: Re-architect and rebuild your applications using cloud-native technologies

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Migrating Applications to the Cloud with Azure

Strategies for Application Modernization Using Azure

This book will cover the different migration strategies, services, resources, and functionalities that Microsoft Azure has to offer to migrate your applications to Azure.

This first chapter introduces application modernization for Azure. It describes the different strategies and steps that companies can take to eventually end up with a full cloud-native app that is fully designed for elastic scaling, is cost-effective, can be decomposed into several loosely coupled services, and is easy to deploy, manage, and maintain.

In this chapter, we will cover the following topics:

  • Introducing application modernization
  • The value of application modernization
  • The cloud maturity model
  • Different migration strategies

Introducing application modernization

The cloud is rapidly changing the way in which applications are designed and architected. We are shifting from monolithic applications to applications that are designed as loosely coupled services that can either communicate through APIs or are using asynchronous messaging and eventing. These applications need to be designed to easily scale horizontally, and new instances should be added or removed rapidly, and mostly automatically. 

This brings big challenges to the underlying architecture of your applications. Operations should be able to be processed in parallel and deployments must be fully automated. The system as a whole, with all the different services included, should be resilient when failures occur.

Monitoring and telemetry must be embedded for the system as a whole as well, to gain insights into the health and performance...

The cloud maturity model

For an application to eventually become fully cloud-native, it should follow an iterative process called the cloud maturity model. The first two steps will either require minimal code or simply the configuration changes necessary to connect to Azure PaaS services or to optimize the application for cloud scale. Applications are moved to the cloud, but are mostly using the same code base as they were using when they were deployed on the on-premises systems. The last step, that is, the step to rebuild the application, will require a complete redesign and refactoring of the application. This step will be the most difficult and most intensive part of the application migration process.

The order of this process can be completely random. Organizations can decide to rebuild their applications from scratch to fully modernized applications immediately...

Different migration strategies

There are four migration strategies that are defined in the cloud maturity model: rehost, refactor, rearchitect, and rebuild. In the upcoming sections, these migration strategies will be explained in more detail.

Rehost

Rehost is often referred to as lift-and-shift migration. When you rehost your applications to the cloud, each application is migrated as-is to the cloud. This technically means that you move the VMs or on-premises servers and put them into the cloud infrastructure. The applications that are installed on the on-premises VMs and servers are then moved in their original state, without any code changes or refactoring of the application.

You can use some of the managed...

Summary

In this chapter, we covered the value that application migration can bring to organizations. We introduced the different migration strategies that are available for migrating your applications to Azure, from a simple lift and shift to a complete rebuild of your application.

In the upcoming chapter, we are going to create a roadmap for application migration to Azure and discuss the different migration strategies.

Questions

Answer the following questions to test your knowledge of the information found in this chapter. You can find the answers in the Assessments section at the end of this book.

  1. What values can migrating applications to Microsoft Azure bring to your organization?
    1. Reducing costs
    2. No investments in developing the skills of your developers
    3. Faster time to market
    4. IT simplification
  1. What are the biggest pros of using the rehost migration strategy for your applications?
    1. No code changes
    2. Migrate quickly to Azure
    3. No infrastructure to manage
    4. Maximum cost reduction
  2. Which migration strategy do you need to choose to start making use of the DevOps practices in Azure?
    1. Rehost
    2. Refactor
    3. Rearchitect
    4. Rebuild

Further reading

You can refer to the following links for more information about the topics covered in this chapter:

Left arrow icon Right arrow icon

Key benefits

  • Decide which migration strategy is most suitable for your organization and create a migration roadmap
  • Move existing infrastructure to Azure and learn strategies to reduce cost, increase storage, and improve ROI
  • Design secure, scalable, and cost-effective solutions with the help of practical examples

Description

Whether you are trying to re-architect a legacy app or build a cloud-ready app from scratch, using the Azure ecosystem with .NET and Java technologies helps you to strategize and plan your app modernization process effectively. With this book, you’ll learn how to modernize your applications by using Azure for containerization, DevOps, microservices, and serverless solutions to reduce development time and costs, while also making your applications robust, secure, and scalable. You will delve into improving application efficiency by using container services such as Azure Container Service, Azure Kubernetes Service (AKS), and more. Next, you will learn to modernize your application by implementing DevOps throughout your application development life cycle. You will then focus on increasing the scalability and performance of your overall application with microservices, before learning how to add extra functionality to your application with Azure serverless solutions. Finally, you’ll get up to speed with monitoring and troubleshooting techniques. By the end of this book, you will have learned how to use the Azure ecosystem to refactor, re-architect, and rebuild your web, mobile, and desktop applications.

Who is this book for?

This book is for.NET and Java developers who want to modernize their applications using Azure. Solution architects and experienced developers interested in modernizing legacy applications using Azure will also find this book useful. Some prior understanding of cloud computing concepts will be beneficial.

What you will learn

  • Use DevOps and containerization technologies to modernize your applications and infrastructure
  • Build microservices using Azure Service Fabric
  • Develop scalable applications using Azure Functions
  • Manage and deploy your application code and database connectivity
  • Secure and monitor your applications in Azure effectively
  • Design for high availability and disaster recovery
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Table of Contents

21 Chapters
Planning Application Modernization Chevron down icon Chevron up icon
Strategies for Application Modernization Using Azure Chevron down icon Chevron up icon
Building Your Application Migration Roadmap Chevron down icon Chevron up icon
Implementing Containerization and DevOps in a Development Cycle Chevron down icon Chevron up icon
Getting Started with Docker and Kubernetes Chevron down icon Chevron up icon
Deploying Highly Scalable Apps with Kubernetes Chevron down icon Chevron up icon
Modernizing Apps and Infrastructure with DevOps Chevron down icon Chevron up icon
Building a Web and Microservices Architecture on Azure Chevron down icon Chevron up icon
Designing Web Applications Chevron down icon Chevron up icon
Scalability and Performance Chevron down icon Chevron up icon
Building Microservices with Service Fabric Chevron down icon Chevron up icon
Going Serverless and Deploying to the Cloud Chevron down icon Chevron up icon
Building Scalable Systems with Azure Functions Chevron down icon Chevron up icon
Connecting to the Database Chevron down icon Chevron up icon
Managing and Deploying Your Code Chevron down icon Chevron up icon
Securing Your Azure Services Chevron down icon Chevron up icon
Planning for Security, Availability, and Monitoring Chevron down icon Chevron up icon
Diagnostics and Monitoring Chevron down icon Chevron up icon
Designing for High Availability and Disaster Recovery Chevron down icon Chevron up icon
Assessments Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
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