Book Overview & Buying
Table Of Contents

Docker High Performance - Second Edition

By : Espinosa, Russ McKendrick

Buy this Book

Docker High Performance

By: Espinosa, Russ McKendrick

Buy this Book

Overview of this book

Docker is an enterprise-grade container platform that allows you to build and deploy your apps. Its portable format lets you run your code right from your desktop workstations to popular cloud computing providers. This comprehensive guide will improve your Docker work?ows and ensure your application's production environment runs smoothly. This book starts with a refresher on setting up and running Docker and details the basic setup for creating a Docker Swarm cluster. You will then learn how to automate this cluster by using the Chef server and cookbooks. After that, you will run the Docker monitoring system with Prometheus and Grafana, and deploy the ELK stack. You will also learn best practices for optimizing Docker images. After deploying containers with the help of Jenkins, you will then move on to a tutorial on using Apache JMeter to analyze your application's performance. You will learn how to use Docker Swarm and NGINX to load-balance your application, and how common debugging tools in Linux can be used to troubleshoot Docker containers. By the end of this book, you will be able to integrate all the optimizations that you have learned and put everything into practice in your applications.

Preface

Who this book is for

What this book covers

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Free Chapter

Preparing Docker Hosts

Preparing a Docker host

Enabling remote access

Building a Docker Swarm cluster

Summary

Configuring Docker with Chef

Importance of configuration management

Using Chef

Configuring the Docker host

Initializing Docker Swarm

Alternative methods

Summary

Monitoring Docker

The importance of monitoring

Collecting metrics with Prometheus

Consolidating logs in an ELK stack

Other monitoring and logging solutions

Summary

Optimizing Docker Images

Reducing deployment time

Improving image build time

Reducing Docker image size

Guide to Optimization

Summary

Deploying Containers

Deploying and configuring Jenkins

Building and deploying a container

Summary

Benchmarking

Setting up Apache JMeter

Building a benchmark workload

Analyzing benchmark results

Tuning the benchmark

Other benchmarking tools

Summary

Load Balancing

Preparing application backends

Balancing load with NGINX

Scaling out our Docker applications

Other load balancers

Summary

Troubleshooting Containers

Inspecting containers with the docker exec command

Debugging from outside Docker

Other container debugging tools

Summary

Onto Production

Performing web operations

Supporting web applications with Docker

Deploying applications

Scaling applications

Preparing application backends

To create a load balanced application, we must first prepare the application where it is served by several replicas in our Docker Swarm service. In the following steps, we will deploy an application that is scaled in our Docker Swarm cluster:

First, we will provision additional nodes in our Docker Swarm cluster. This is to make sure we have enough capacity in our cluster to scale out our application later. In the following output, we can see that we have four nodes available:

dockerhost$ docker node ls
ID         HOSTNAME   STATUS AVAILA...  MANAGER...   ENGINE VERSION
9tcxzq45 * dockerhost Ready  Active     Leader       18.09.3
thxcn7ev   node-5lfg  Ready  Active                  18.09.0
7lyr93qf   node-ftc0  Ready  Active                  18.09.0
oydrnufp   node-hqvv  Ready  Active                  18.09.0