Use this book to learn the Distributed Application Runtime (Dapr),
a new event-driven runtime from Microsoft designed to help
developers build microservices applications, using a palette of
languages and frameworks that run everywhere: on-premises, in any
cloud, and even on the edge. One of the most popular architectural
patterns for implementing large, complex, distributed solutions is
the microservices architectural style. Because solutions are
composed of services based on various languages, frameworks, and
platforms, the more complex and compartmentalized an application
becomes, the more considerations a developer has to keep in mind.
Much of the time this proves to be difficult. Introducing
Distributed Application Runtime (Dapr) is your guide to achieving
more with less through patterns. Part I of the book is about
understanding microservices and getting up and running with Dapr,
either on your machine or in any Kubernetes cluster. From there you
are guided through the concepts of Dapr, how it works, and what it
can do for you. You will wrap up with various ways to debug Dapr
applications using Visual Studio Code locally, inside a container
or Kubernetes. In Part II you will jump into the reusable patterns
and practices, the building blocks of Dapr. You will go from
service invocation, publish and subscribe, state management,
resource bindings, and the Actor model to secrets; each building
block is covered in detail in its own dedicated chapter. You will
learn what Dapr offers from a functional perspective and also how
you can leverage the three pillars of observability (logs, metrics,
and traces) in order to gain insight into your applications. In
Part III you will explore advanced concepts, including using
middleware pipelines, integrating Dapr into web frameworks such as
ASP.NET Core, or the runtimes of Azure Logic Apps and Azure
Functions. The book features a multi-versed set of examples that
cover not only the plain API of Dapr, but also the .NET SDK. Hence,
most of the examples are in .NET 5, with a small number in
JavaScript to exemplify the use of multiple languages. Examples
show you how to securely use Dapr to leverage a variety of services
in Microsoft Azure, including Azure Kubernetes Service, Azure
Storage, Azure Service Bus, Azure Event Grid, Azure Key Vault,
Azure Monitor, and Azure Active Directory among others. What You
Will Learn Recognize the challenges and boundaries of microservices
architecture Host Dapr inside a Kubernetes cluster or as a
standalone process Leverage and use Dapr's ready-to-use patterns
and practices Utilize its HTTP/gRPC APIs Use Dapr with ASP.NET Core
and in .NET applications (with or without the SDK) Implement
observability for Dapr applications Secure Dapr applications
Integrate Dapr with the runtime of Azure Logic Apps and Azure
Functions Realize the full potential of Visual Studio Code by using
the right extensions that will contribute to a better development
experience Who This Book Is For Developers and architects who want
to utilize a proven set of patterns to help easily implement
microservices applications
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