Book Image

Learn Docker - Fundamentals of Docker 19.x - Second Edition

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 19.x - Second Edition

By: Dr. Gabriel N. Schenker

Overview of this book

Containers enable you to package an application with all the components it needs, such as libraries and other dependencies, and ship it as one package. Docker containers have revolutionized the software supply chain in both small and large enterprises. Starting with an introduction to Docker fundamentals and setting up an environment to work with it, you’ll delve into concepts such as Docker containers, Docker images, and Docker Compose. As you progress, the book will help you explore deployment, orchestration, networking, and security. Finally, you’ll get to grips with Docker functionalities on public clouds such as Amazon Web Services (AWS), Azure, and Google Cloud Platform (GCP), and learn about Docker Enterprise Edition features. Additionally, you’ll also discover the benefits of increased security with the use of containers. By the end of this Docker book, you’ll be able to build, ship, and run a containerized, highly distributed application on Docker Swarm or Kubernetes, running on-premises or in the cloud.
Table of Contents (25 chapters)
1
Section 1: Motivation and Getting Started
4
Section 2: Containerization, from Beginner to Black Belt
11
Section 3: Orchestration Fundamentals and Docker Swarm
18
Section 4: Docker, Kubernetes, and the Cloud

Monitoring and Troubleshooting an App Running in Production

In the previous chapter, we learned how to deploy a multi-service application into a Kubernetes cluster. We configured application-level routing for the application and updated its services using a zero-downtime strategy. Finally, we provided confidential data to the running services by using Kubernetes Secrets.

In this chapter, you will learn the different techniques used to monitor an individual service or a whole distributed application running on a Kubernetes cluster. You will also learn how you can troubleshoot an application service that is running in production, without altering the cluster or the cluster nodes on which the service is running.

The chapter covers the following topics:

  • Monitoring an individual service
  • Using Prometheus to monitor your distributed application
  • Troubleshooting a service running in production...