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  • Book Overview & Buying Containerization with LXC
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Containerization with LXC

Containerization with LXC

By : Konstantin Ivanov
5 (2)
Buy this Book
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Containerization with LXC

Containerization with LXC

5 (2)
By: Konstantin Ivanov
Buy this Book

Overview of this book

In recent years, containers have gained wide adoption by businesses running a variety of application loads. This became possible largely due to the advent of kernel namespaces and better resource management with control groups (cgroups). Linux containers (LXC) are a direct implementation of those kernel features that provide operating system level virtualization without the overhead of a hypervisor layer. This book starts by introducing the foundational concepts behind the implementation of LXC, then moves into the practical aspects of installing and configuring LXC containers. Moving on, you will explore container networking, security, and backups. You will also learn how to deploy LXC with technologies like Open Stack and Vagrant. By the end of the book, you will have a solid grasp of how LXC is implemented and how to run production applications in a highly available and scalable way.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Introduction to Linux Containers
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1. Introduction to Linux Containers
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The OS kernel and its early limitations
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The case for Linux containers
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Linux namespaces – the foundation of LXC
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Summary
2
2. Installing and Running LXC on Linux Systems
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2. Installing and Running LXC on Linux Systems
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Installing LXC
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Building and manipulating LXC containers
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Summary
3
3. Command-Line Operations Using Native and Libvirt Tools
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3. Command-Line Operations Using Native and Libvirt Tools
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Using the LVM backing store
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Using the Btrfs backing store
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Using the ZFS backing store
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Autostarting LXC containers
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LXC container hooks
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Attaching directories from the host OS and exploring the running filesystem of a container
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Freezing a running container
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Limiting container resource usage
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Building and running LXC containers with libvirt
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Summary
4
4. LXC Code Integration with Python
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4. LXC Code Integration with Python
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LXC Python bindings
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Libvirt Python bindings
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Vagrant and LXC
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Putting it all together – building a simple RESTful API to LXC with Python
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Summary
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5. Networking in LXC with the Linux Bridge and Open vSwitch
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5. Networking in LXC with the Linux Bridge and Open vSwitch
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Software bridging in Linux
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Connecting LXC to the host network
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Summary
6
6. Clustering and Horizontal Scaling with LXC
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6. Clustering and Horizontal Scaling with LXC
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Scaling applications with LXC
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Summary
7
7. Monitoring and Backups in a Containerized World
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7. Monitoring and Backups in a Containerized World
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Backing up and migrating LXC
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Monitoring and alerting on LXC metrics
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Simple autoscaling pattern with LXC, Jenkins, and Sensu
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Summary
8
8. Using LXC with OpenStack
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8. Using LXC with OpenStack
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Deploying OpenStack with LXC support on Ubuntu
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Summary
9
A. LXC Alternatives to Docker and OpenVZ
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A. LXC Alternatives to Docker and OpenVZ
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Building containers with OpenVZ
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Building containers with Docker
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Running unprivileged LXC containers
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Summary

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Manually building the root filesystem and configuration files using tools such as debootstrap and yum."

A block of code is set as follows:

#define _GNU_SOURCE
#include<stdlib.h>
#include<stdio.h>
#include<signal.h>
#include<sched.h>
 
staticintchildFunc(void *arg)
{
  printf("UID inside the namespace is %ld\n", (long) geteuid());
  printf("GID inside the namespace is %ld\n", (long) getegid());
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

<head> 
#define _GNU_SOURCE
#include
#include
#include
#include

staticintchildFunc(void *arg)
{
  printf("UID inside the namespace is %ld\n", (long) geteuid());
  printf("GID inside the namespace is %ld\n", (long) getegid());
}

Any command-line input or output is written as follows:

root@ubuntu:~# lsb_release -dc
Description:   	Ubuntu 14.04.5 LTS
Codename:      	trusty
root@ubuntu:~#

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Navigate to Networking support | Networking options | 802.1d Ethernet Bridging and select either Y to compile the bridging functionality in the kernel, or M to compile it as a module."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

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