Mastering CoreOS : create production CoreOS clusters and master the art of deploying Container-based microservices / Sreenivas Makam.

Online resource; title from PDF title page (EBSCO, viewed April 19, 2016).

Includes index.

Create production CoreOS clusters and master the art of deploying Container-based microservicesAbout This Book Confidently deploy distributed applications and effectively manage distributed infrastructure using Containers and CoreOS Build secure, scalable CoreOS clusters to deploy distributed applications using open source technologies and industry best practices Every concept and technology in this book is illustrated with practical examples that can be used in both development and production environments. Who This Book Is ForThis book is intended for Cloud application developers and Cloud infrastructure administrators. If you are looking to deploy a CoreOS cluster or you already have a CoreOS cluster that you want to manage better in terms of performance, security, and scaling, then this book is perfect for you. To follow the hands-on stuff, you need to have a Google and an AWS Cloud account and be able to run CoreOS VMs on your machine. A basic understanding of public and private clouds, Containers, Docker, Linux, and CoreOS is required. What You Will Learn Install CoreOS on a VM, on the Cloud, and bare metal, and find out how to keep your cluster secure and up to date Configure and troubleshoot key CoreOS services, such as etcd, systemd, and fleet, for distributed application deployment Study container networking using CoreOS Flannel and other solutions, such as Docker libnetwork, Weave, and Calico Explore the container filesystem and container volume management using Docker volume, NFS, GlusterFS, and Flocker Get to know the internals of container technologies such as Docker, Rkt, and Container orchestration using Openstack, Kubernetes and Docker native solutions Troubleshoot CoreOS cluster and Containers using monitoring and logging tools and master production techniques such as staging, security, and automationIn DetailCoreOS makes Google and Amazon-style Cloud infrastructure available for anyone building their own private Cloud. This book covers the CoreOS internals and the technologies used in the deployment of container-based distributed applications. It starts with an overview of CoreOS and distributed application development while sharing knowledge on related technologies. Critical CoreOS services and networking and storage considerations for CoreOS are covered next. In latter half of the book, you will learn about Container runtime systems such as Docker and Rkt and Container Orchestration using Kubernetes. You will also find out about the integration of popular orchestration solutions such as OpenStack, the AWS Container service, and the Google Container Engine with CoreOS and Docker. Lastly, we cover troubleshooting as well as production considerations. Style and approachThis is an easy-tofollow, comprehensive guide that covers both basic and advanced concepts. All topics are illustrated with practical examples that can be used in both simulation and production environments.

Cover; Copyright; Credits; About the Author; Acknowledgments; About the Reviewers; www.PacktPub.com; Table of Contents; Preface; Chapter 1: CoreOS Overview; Distributed application development; Components of distributed application development; Advantages and disadvantages; A minimalist Container-optimized OS; Containers; Technology; Advantages; An overview of Docker architecture; Advantages of Docker; CoreOS; Properties; Advantages; Supported platforms; CoreOS components; Kernel; Systemd; Etcd; Fleet; Flannel; Rkt; The CoreOS cluster architecture; The development cluster

The production clusterDocker versus Rkt; History; APPC versus OCI; The current status; Differences between Docker and Rkt; A workflow for distributed application development with Docker and CoreOS; Summary; References; Further reading and tutorials; Chapter 2: Setting up the CoreOS Lab; Cloud-config; The CoreOS cloud-config file format; The main sections of cloud-config; A sample CoreOS cloud-config; The cloud-config validator; A hosted validator; The cloudinit validator; Executing cloud-config; The CoreOS cluster with Vagrant; Steps to start the Vagrant environment

Important files to be modifiedVagrantfile; User-data; Config.rb; Vagrant -- a three-node cluster with dynamic discovery; Generating a discovery token; Steps for cluster creation; Vagrant -- a three-node cluster with static discovery; Vagrant -- a production cluster with three master nodes and three worker nodes; A CoreOS cluster with AWS; AWS -- a three-node cluster using Cloudformation; AWS -- a three-node cluster using AWS CLI; A CoreOS cluster with GCE; GCE -- a three-node cluster using GCE CLI; CoreOS installation on Bare Metal; Basic debugging; journalctl; systemctl; Cloud-config

Logging from one CoreOS node to anotherImportant files and directories; Common mistakes and possible solutions; Summary; References; Further reading and tutorials; Chapter 3: CoreOS Autoupdate; The CoreOS release cycle; The partition table on CoreOS; CoreOS automatic update; Update and reboot services; Update-engine.service; Debugging update-engine.service; Locksmithd.service; Locksmith strategy; Groups; Locksmithctl; Debugging locksmithd.service; Setting update options; Using cloud-config; Manual configuration; Update examples; Updating within the same release channel

Updating from one release channel to anotherCoreUpdate; Vagrant CoreOS update; Summary; References; Further reading and tutorials; Chapter 4: CoreOS Primary Services -- Etcd, Systemd, and Fleet; Etcd; Versions; Installation; Standalone installation; Accessing etcd; REST; Etcdctl; Etcd configuration; Etcd operations; Etcd tuning; Etcd proxy; Adding and removing nodes from a cluster; Node migration and backup; Etcd security; Certificate authority -- etcd-ca; Installing etcd-ca; Etcd secure client-to-server communication using a server certificate

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