Learning CoreOS电子书

Learning CoreOS

Table of Contents

Learning CoreOS

Credits

About the Authors

About the Reviewer

www.PacktPub.com

eBooks, discount offers, and more

Why subscribe?

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the color images of this book

Errata

Piracy

Questions

1. CoreOS, Yet Another Linux Distro?

Introduction to CoreOS

CoreOS versus other Linux distributions

CoreOS high-level architecture

Service discovery

etcd

Container management

Linux Container

cgroups

Namespace

Chroot

Docker

Docker versus LXC

Rocket

CoreOS cluster management:

systemd

fleet

CoreOS and OpenStack

Summary

2. Setting Up Your CoreOS Environment

Installing GIT

Installing VirtualBox

Introduction to Vagrant

Installing Vagrant

Vagrant configuration files

Cloud-config

The config.rb configuration file

Starting a CoreOS VM using Vagrant

Setting up CoreOS on VMware vSphere

Installing VMware vSphere Client

Introduction to Docker

Image

Container

Volumes

Links

Installing Docker

Creating a sample Docker image using Docker File

Docker File

Pulling the Docker image from Docker Hub

Running Docker Image

Summary

3. Creating Your CoreOS Cluster and Managing the Cluster

Introduction to clustering

The why and the benefits of clustering

CoreOS clustering

Cluster discovery

Static discovery

etcd discovery

DNS discovery

systemd

Service unit files

Starting and stopping a service

fleet

Architectural overview

Engine

Agent

fleetctl

Standard (local) and global units

Unit file options for fleet

Instantiating the service unit in the cluster

Recovering from node failure

Summary

4. Managing Services with User-Defined Constraints

Introduction to service constraints

Predefined constraints using metadata

Service level affinity/anti-affinity

Node-level affinity

High availability

Summary

5. Discovering Services Running in a Cluster

Introduction and necessity of service discovery

Mechanism for service discovery

Operations of etcd

Operations using etcdctl

etcd write using etcdctl

etcd read using etcdctl

etcd watch using etcdctl

Example of etcd using etcdctl

Operations using cURL

etcd read using curl

etcd write using curl

etcd watch using curl

Example using curl

HAProxy and service discovery

Summary

6. Service Chaining and Networking Across Services

Introduction to and necessity of service chaining

Introduction to Docker networking

Container–Container communication

Docker0 bridge and veth pair

Using Link

Using common network stack

Container to CoreOS host communication

Host networking

docker0 bridge

Container to CoreOS outside world communication

Host networking

Port mapping

Container – Container communication in different CoreOS nodes

Introduction to Weave

Introduction to Flannel/Rudder

Installation

Setting up Weave

Container startup

Integrating Flannel with CoreOS

Summary

7. Creating a Virtual Tenant Network and Service Chaining Using OVS

Introduction to OVS

OVS architectural overview

Advantages of using OVS in CoreOS

Introduction to overlay and underlay networks

Introduction to network virtualization

OpenFlow support in OVS

OpenFlow switch

OpenFlow controller

OpenFlow channel

Running OVS in CoreOS

Attaching docker0 bridge to OVS

Configuration in CoreOS Instance 1

Configurations during the instantiation of a CoreOS node 1 in a cluster

Configurations during the creation of a container for CoreOS Instance 1

Configuration in CoreOS Instance 2

Configurations during the instantiation of CoreOS node 2 in a cluster

Configurations during the creation of a container for CoreOS Instance 2

Attaching container's veth interface to OVS

Configuration in CoreOS Instance 1

Configurations during the instantiation of a CoreOS node in a cluster

Configurations during the creation of the first container for a tenant

Configurations during the creation of subsequent containers for a tenant

Configuration in CoreOS Instance 2

Configurations during the instantiation of a CoreOS node in a cluster

Configurations during the creation of the first container for a tenant

Configurations during the creation of subsequent containers for a tenant

Looping issue

Summary

8. What Next?

Container security

Update and patches – CoreUpdate

Dex

sysdig

Competitive container orchestration mechanism

Kubernetes

Kubernetes master

Kubernetes nodes

Kubernetes pods

Kubernetes service

CoreOS and Kubernetes

Apache-Mesos

Mesos master

Mesos agent

ZooKeeper

Mesos frameworks

Swarm

Docker data volume management

Introduction to Flocker

Flocker control services

Flocker agents

Flocker plugin for Docker

Open Container Project

Summary

Index