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Docker Cookbook

Docker Cookbook

By : Cochrane, Jeeva S. Chelladhurai, K Khare
3.5 (2)
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Docker Cookbook

Docker Cookbook

3.5 (2)
By: Cochrane, Jeeva S. Chelladhurai, K Khare

Overview of this book

Docker is an open source tool used for creating, deploying, and running applications using containers. With more than 100 self-contained tutorials, this book examines common pain points and best practices for developers building distributed applications with Docker. Each recipe in this book addresses a specific problem and offers a proven, best practice solution with insights into how it works, so that you can modify the code and configuration files to suit your needs. The Docker Cookbook begins by guiding you in setting up Docker in different environments and explains how to work with its containers and images. You’ll understand Docker orchestration, networking, security, and hosting platforms for effective collaboration and efficient deployment. The book also covers tips and tricks and new Docker features that support a range of other cloud offerings. By the end of this book, you’ll be able to package and deploy end-to-end distributed applications with Docker and be well-versed with best practice solutions for common development problems.
Table of Contents (13 chapters)
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Introduction

Docker containers, actually, are not Sandbox applications, which means they are not recommended to run random applications on the system as root with Docker. You should always treat a container running a service/process as a service/process running on the host system, and put all the security measures inside the container you put on the host system.

We saw in Chapter 1, Introduction and Installation, how Docker uses namespaces for isolation. The six namespaces that Docker uses are Process, Network, Mount, Hostname, Shared Memory, and User. Not everything in Linux is namespaced, for example, SELinux, Cgroups, Devices (/dev/mem, /dev/sd*), and Kernel Modules. Filesystems under /sys, /proc/sys, /proc/sysrq-trigger, /proc/irq, and /proc/bus are also not namespaced, but they are mounted as read-only by default with the containerD container runtime.

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