Book Image

Designing and Implementing Microsoft DevOps Solutions AZ-400 Exam Guide - Second Edition

By : Subhajit Chatterjee, Swapneel Deshpande, Henry Been, Maik van der Gaag
Book Image

Designing and Implementing Microsoft DevOps Solutions AZ-400 Exam Guide - Second Edition

By: Subhajit Chatterjee, Swapneel Deshpande, Henry Been, Maik van der Gaag

Overview of this book

The AZ-400 Designing and Implementing Microsoft DevOps Solutions certification helps DevOps engineers and administrators get to grips with practices such as continuous integration and continuous delivery (CI/CD), containerization, and zero downtime deployments using Azure DevOps Services. This new edition is updated with advanced topics such as site reliability engineering (SRE), continuous improvement, and planning your cloud transformation journey. The book begins with the basics of CI/CD and automated deployments, and then moves ahead to show you how to apply configuration management and Infrastructure as Code (IaC) along with managing databases in DevOps scenarios. As you make progress, you’ll explore fitting security and compliance with DevOps and find out how to instrument applications and gather metrics to understand application usage and user behavior. This book will also help you implement a container build strategy and manage Azure Kubernetes Services. Lastly, you’ll discover quick tips and tricks to confidently apply effective DevOps practices and learn to create your own Azure DevOps organization. By the end of this DevOps book, you'll have gained the knowledge needed to ensure seamless application deployments and business continuity.
Table of Contents (27 chapters)
1
Part 1 – Digital Transformation through DevOps
5
Part 2 – Getting to Continuous Delivery
9
Part 3 – Expanding Your DevOps Pipeline
15
Part 4 – Closing the Loop
18
Part 5 – Advanced Topics

Upgrading containers

In Kubernetes, applications are very easily updated. For this, Kubernetes uses rolling updates, which means that traffic to a container is first drained before the container is replaced. During an upgrade of the application, Kubernetes will deploy an additional Pod and run it through some specified probes.

A probe is a diagnostic that is periodically performed on a Pod to check its status. During the upgrading or creation of a Pod, Kubernetes brings up the additional Pod and makes sure that it passes the liveness and readiness probes.

If the newly created Pod succeeds with both probes, the traffic to a single, old Pod is terminated and traffic to the new Pod is opened. For this termination, Kubernetes uses a termination grace period. During this period, the connection to the load balancer is stopped and active connections are processed successfully, and new traffic is routed to a running Pod. During the 30-second default grace period, the Pod is in a termination...