Book Image

Modernizing Legacy Applications to Microsoft Azure

By : Steve Read, Larry Mead
Book Image

Modernizing Legacy Applications to Microsoft Azure

By: Steve Read, Larry Mead

Overview of this book

Organizations have varying circumstances, objectives, and prerequisites when contemplating a hyper-scale cloud solution transformation to a platform such as Azure. Modernizing Legacy Applications to Microsoft Azure uncovers potential scenarios and provides choices, methodologies, techniques, and prospective possibilities for transitioning from legacy applications to the Microsoft Azure environment. You’ll start by understanding the legacy systems and the main concerns regarding migration. Then, you’ll investigate why distributed architectures are compelling and the various components of the Azure platform needed during migration. After that, you’ll explore the approaches to modernizing legacy applications and the Rs of modernizing (i.e., rehost, refactor, rearchitect, and retire). You’ll also learn about integration approaches and potential pitfalls. By the end of this book, you’ll be well equipped to modernize your legacy workloads while being aware of pitfalls and best practices.
Table of Contents (18 chapters)
Part 1: Legacy Estate Options
Chapter 2: Strategies for Modernizing IBM and Unisys Mainframes
Part 2: Architecture Options
Part 3: Azure Deployment and Future Considerations

Understanding the Azure approach to hybrid

As we mentioned earlier in the chapter, when Azure was first released, it was very focused on cloud and web development, with really no provision for running any other types of workloads. That all changed, however, in 2013, with the advent of ARM. Since then, Microsoft has put a lot of investment into hybrid options, with a focus on technologies that allow seamless management across on-premises deployments, Azure, and other public clouds.

Typically, when we refer to hybrid environments, we are talking about one of the following three scenarios:

  • On-premises environments: Here, the scenario is to extend the on-premises data center into the Azure cloud. Technologies that you can leverage for this include the following:
    • AAD: To integrate with your on-premises Active Directory.
    • Azure Monitor: This allows you to monitor not only your Azure resources but also your on-premises resources as well. Note there is an agent that needs to be installed...