Table Of ContentLearning CoreOS
Table of Contents
Learning CoreOS
Credits
About the Authors
About the Reviewer
www.PacktPub.com
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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
