CentOS High Performance

Packt Publishing Limited
  • 1. Auflage
  • |
  • erschienen am 30. Januar 2016
  • |
  • 146 Seiten
E-Book | ePUB mit Adobe DRM | Systemvoraussetzungen
978-1-78528-434-2 (ISBN)
Create high availability clusters to enhance system performance using CentOS 7About This BookMaster the concepts of high performance and high availability to eliminate performance bottlenecksMaximize the uptime of services running in a CentOS 7 clusterA step-by-step guide that will provide knowledge of methods and approaches to optimize the performance of CentOS clustersWho This Book Is ForThis book is targeted at system administrators: those who want a detailed, step-by-step guide to learn how to set up a high-availability CentOS 7 cluster, and those who are looking for a reference book to help them learn or refresh the necessary skills to ensure their systems and respective resources are utilized optimally. No previous knowledge of high-availability systems is needed, though the reader is expected to have at least some degree of familiarity with any spin-off of the Fedora family of Linux distributions, preferably CentOS.What You Will LearnInstall a CentOS 7 cluster and network infrastructureConfigure firewall, networking, and clustering services and settingsSet up and test a HAC (high-availability cluster) to host an Apache web server and a MariaDB database serverMonitor performance and availabilityIdentify bottlenecks and troubleshoot issuesImprove performance and ensure high availabilityIn DetailCentOS is the enterprise level Linux OS, which is 100% binary compatible to Red Hat Enterprise Linux (RHEL). It acts as a free alternative to RedHat's commercial Linux offering, with only a change in the branding. A high performance cluster consists in a group of computers that work together as one set parallel, hence minimizing or eliminating the downtime of critical services and enhancing the performance of the application.Starting with the basic principles of clustering, you will learn the necessary steps to install a cluster with two CentOS 7 servers. We will then set up and configure the basic required network infrastructure and clustering services. Further, you will learn how to take a proactive approach to the split-brain issue by configuring the failover and fencing of the cluster as a whole and the quorum of each node individually. Further, we will be setting up HAC and HPC clusters as a web server and a database server. You will also master the art of monitoring performance and availability, identifying bottlenecks, and exploring troubleshooting techniques.At the end of the book, you'll review performance-tuning techniques for the recently installed cluster, test performance using a payload simulation, and learn the necessary skills to ensure that the systems, and the corresponding resources and services, are being utilized to their best capacity.Style and approachAn easy-to-follow and step-by-step guide with hands-on instructions to set up real-world simple cluster scenarios that will start you on the path to building more complex applications on your own.
  • Englisch
  • Birmingham
  • |
  • Großbritannien
978-1-78528-434-2 (9781785284342)
1785284347 (1785284347)
weitere Ausgaben werden ermittelt
Gabriel Canepa is a Linux Foundation certified system administrator (LFCS-1500-0576-0100) and web developer from Villa Mercedes, San Luis, Argentina. He works for a worldwide leading consumer product company and takes great pleasure in using FOSS tools to increase productivity in all areas of his daily work. When he's not typing commands or writing code or articles, he enjoys telling bedtime stories with his wife to his two little daughters and playing with them, which is a great pleasure in his life.
  • Cover
  • Copyright
  • Credits
  • About the Author
  • About the Reviewers
  • www.PacktPub.com
  • Table of Contents
  • Preface
  • Chapter 1: Cluster Basics and Installation on CentOS 7
  • Clustering fundamentals
  • Why Linux and CentOS 7?
  • Downloading CentOS
  • Setting up CentOS 7 nodes
  • Installing CentOS 7
  • Setting up the network infrastructure
  • Installing the packages required for clustering
  • Key software components
  • Setting up key-based authentication for SSH access
  • Summary
  • Chapter 2: Installing Cluster Services and Configuring Network Components
  • Configuring and starting clustering services
  • Starting and enabling clustering services
  • Troubleshooting
  • Security fundamentals
  • Letting in and letting out
  • Getting acquainted with PCS
  • Managing authentication and creating the cluster
  • Setting up a virtual IP for the cluster
  • Adding a virtual IP as a cluster resource
  • Viewing the status of the virtual IP
  • Summary
  • Chapter 3: A Closer Look at High Availability
  • Failover - an introduction to high availability and performance
  • Fencing - isolating the malfunctioning nodes
  • Installing and configuring a STONITH device
  • Split-brain - preparing to avoid inconsistencies
  • Quorum - scoring inside your cluster
  • Configuring our cluster with PCS GUI
  • Summary
  • Chapter 4: Real-world Implementations of Clustering
  • Setting up storage
  • ELRepo repository and DRBD availability
  • Configuring DRBD
  • Adding DRBD as a PCS cluster resource
  • Installing the web and database servers
  • Configuring the web server as a cluster resource
  • Mounting the DRBD resource and using it with Apache
  • Testing the DRBD resource along with Apache
  • Setting up a high-availability database with replicated storage
  • Troubleshooting
  • Summary
  • Chapter 5: Monitoring the Cluster Health
  • Cluster services and performance
  • Monitoring the node status
  • Monitoring the resources
  • When a resource refuses to start
  • Checking the availability of core components
  • Summary
  • Chapter 6: Measuring and Increasing Performance
  • Setting up a sample database
  • Downloading and installing the Employees database
  • Introducing initial cluster tests
  • Test 1 - retrieving all fields from all records
  • Test 2 - performing JOIN operations
  • Performing a failover
  • Measuring and improving performance
  • Apache's configuration and settings
  • Loading and disabling modules
  • Placing limits on the number of Apache processes and children
  • Database resource
  • Creating indexes
  • Using query cache
  • Moving to an A/A cluster
  • Summary
  • Index

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