Book Image

AWS Certified DevOps Engineer - Professional Certification and Beyond

By : Adam Book
Book Image

AWS Certified DevOps Engineer - Professional Certification and Beyond

By: Adam Book

Overview of this book

The AWS Certified DevOps Engineer certification is one of the highest AWS credentials, vastly recognized in cloud computing or software development industries. This book is an extensive guide to helping you strengthen your DevOps skills as you work with your AWS workloads on a day-to-day basis. You'll begin by learning how to create and deploy a workload using the AWS code suite of tools, and then move on to adding monitoring and fault tolerance to your workload. You'll explore enterprise scenarios that'll help you to understand various AWS tools and services. This book is packed with detailed explanations of essential concepts to help you get to grips with the domains needed to pass the DevOps professional exam. As you advance, you'll delve into AWS with the help of hands-on examples and practice questions to gain a holistic understanding of the services covered in the AWS DevOps professional exam. Throughout the book, you'll find real-world scenarios that you can easily incorporate in your daily activities when working with AWS, making you a valuable asset for any organization. By the end of this AWS certification book, you'll have gained the knowledge needed to pass the AWS Certified DevOps Engineer exam, and be able to implement different techniques for delivering each service in real-world scenarios.
Table of Contents (31 chapters)
Section 1: Establishing the Fundamentals
Section 2: Developing, Deploying, and Using Infrastructure as Code
Section 3: Monitoring and Logging Your Environment and Workloads
Section 4: Enabling Highly Available Workloads, Fault Tolerance, and Implementing Standards and Policies
Section 5: Exam Tips and Tricks

Deploying versions using Lambda

If you have a known good state for your Lambda function, you can freeze it from future changes by publishing a version of the function. Once published, this version will be called and used by users and services independently of any changes or updates made to future versions, including iterations done on the $Latest function.

When you publish a version of a Lambda function, it contains the following information:

  • The function code, as well as all the dependencies that are associated with it.
  • The Lambda runtime that invokes the function.
  • All of the function settings, such as memory, VPC association, and IAM role.
  • Any environment variables that have been added to the function.
  • A unique Amazon Resource Name (ARN), so that the distinct version of the function can be identified:

Figure 12.6 – Lambda versions and how they map to aliases

Versions can be referenced in one of two ways: either...