Troubleshoot your Puppet infrastructure to leverage your system's performance effectively About This Book Covers major tools in Puppet deployment Fix catalog compilation problems and deal with issues found in larger deployments, such as scaling and improving performance. A fast-paced guide with real-world examples Who This Book Is For If you are a beginner to intermediate Puppet Engineer looking for guidance to help fix problems with your Puppet deployments, this book is for you. What You Will Learn Debug your Puppet infrastructure Use APIs to ensure services are working properly Fix catalog compilation issues Solve problems using Hiera tool Detect problems in your environment using PuppetDB tool Learn ways to format code to aid in identifying errors Troubleshoot errors in modules and templates In Detail Puppet is a configuration management system written for system administrators to manage a large number of systems efficiently and help maintain order. Deploying Puppet becomes more complex as you increase the number of nodes in your environment. The Puppet tool is an intelligent solution that increases the automation footprint for the proactive management of server infrastructures. Puppet's simple programming language is usable on most operating systems and is portable on different deployment environments. We begin by looking at the puppet.conf server configuration file, and talk about possible problems that can occur. What does puppet really do in the background and what options does it provide for troubleshooting? This is what we will explore. Moving on, we will be troubleshooting errors made in modules and templates, finding the best solutions. We will be writing code that will helping us in identify errors. Then we will explain how several ENCs do their job and how puppet communicates with them. We will learn how PuppetDB collects data generated by Puppet. It also enables advanced Puppet features like exported resources, and can be the foundation for other applications that use Puppet's data. By the end of the book we will have learned the best debugging tips for Puppet and PuppetServer. Style and approach This is a quick-paced guide packed with real-world examples and solutions to obstacles in your Puppet infrastructure.
Master Puppet for configuration management of your systems in an enterprise deployment About This Book This book is an advanced guide to using and deploying Puppet 4 in your organization with a special focus on issues faced in larger enterprise deployments From an experienced author, learn to deal with scaling, performance, and multiple developers with the help of real-world examples This is the most up-to-date guide on Puppet, and covers the advanced concepts of Puppet 4 Who This Book Is For This book is for those who have intermediate knowledge of Puppet and are looking to deploy it in their environment. Some idea how to write simple modules for configuration management with Puppet is a prerequisite for this book. What You Will Learn Scale out your Puppet infrastructure using proxying techniques Automate your code promotion workflow using Git and r10k Solve real-world problems using public modules from the Puppet Forge Use Hiera to separate the data of your configuration from the code of your configuration Write your own custom facts in Ruby Extend Puppet with your own custom facts, modules, and types Use exported resources to orchestrate change between machines Debug a puppetserver using Java techniques In Detail Puppet is a configuration management system and a language. It was written for and by system administrators to manage large numbers of systems efficiently and prevent configuration drifts. Mastering Puppet deals with the issues faced when scaling out Puppet to handle large numbers of nodes. It will show you how to fit Puppet into your enterprise and allow many developers to work on your Puppet code simultaneously. In addition, you will learn to write custom facts and roll your own modules to solve problems. Next, popular options for performing reporting and orchestration tasks will be introduced in this book. Moving over to troubleshooting techniques, which will be very useful. The concepts presented are useful to any size organization. By the end of the book, you will know how to deal with problems of scale and exceptions in your code, automate workflows, and support multiple developers working simultaneously. Style and approach This book is a step-wise guide packed with examples to help you configure complex systems in Puppet.
Write custom plugins for Puppet, including facts, providers, and functions Key Features Grasp recipes that work with centralized and decentralized deployments Explore language differences and enhancements anticipated in Puppet version 5.x Gain expert understanding of Puppet's latest and most advanced features Book Description Puppet is a configuration management system that automates all your IT configurations, giving you control of managing each node. Puppet 5 Cookbook will take you through Puppet's latest and most advanced features, including Docker containers, Hiera, and AWS Cloud Orchestration. Updated with the latest advancements and best practices, this book delves into various aspects of writing good Puppet code, which includes using Puppet community style, checking your manifests with puppet-lint, and learning community best practices with an emphasis on real-world implementation. You will learn to set up, install, and create your first manifests with version control, and also learn about various sysadmin tasks, including managing configuration files, using Augeas, and generating files from snippets and templates. As the book progresses, you'll explore virtual resources and use Puppet's resource scheduling and auditing features. In the concluding chapters, you'll walk through managing applications and writing your own resource types, providers, and external node classifiers. By the end of this book, you will have learned to report, log, and debug your system. What you will learn Discover the latest and most advanced features of Puppet Master techniques to deal with centralized and decentralized Puppet deployments Use exported resources and forge modules to configure and deploy applications Create efficient manifests to streamline your deployments Automate deployment of puppet environment using git-hooks Deploy AWS instances and Docker containers with Puppet Make Puppet reliable, performant, and scalable Who this book is for Puppet 5 Cookbook is for anyone who builds and administers servers, especially in a web operations context. You’ll need some experience of Linux systems administration, including familiarity with the command line, filesystem, and text editing. No prior programming experience is required.
This book is for anyone who builds and administers servers, especially in a web operations context. It requires some experience of Linux systems administration, including familiarity with the command line, file system, and text editing. No programming experience is required.
The twisty roads—and twisted tales—of the Appalachian Mountains make for distracted driving in western Pennsylvania. Ghostly travelers are said to wander the lonely roads of western Pennsylvania. A creeping fog rises from Blue Mist Road, and stories of car crashes, lynchings and even strange beasts haunt this isolated stretch outside Pittsburgh. Is it the angry spirit of a jealous husband or a gypsy king who stalks Erie County’s Axe Murder Hollow? Shades of Death Road in Washington County may be host to phantom coal miners killed during a deadly labor dispute. With firsthand accounts and historical research, authors Thomas White and Tony Lavorgne travel the backcountry roads and byways of western Pennsylvania to discover their ghost tales and mysterious legends. Includes photos! “The authors include a history of each road along with the supernatural legends and other unexplained activity. Surprisingly, they are able to provide possible explanations for most of the alleged hauntings, but admit that they cannot account for every one, which allows the roads in question to keep their allure and spooky possibilities.” —PopCultureGuy
The possibilities and limits of digitalization in general and artificial intelligence in particular are demonstrated in a practice-oriented manner. Ways to generate and secure competitive advantages are presented. The topic is examined from the perspective of the company, the function of controlling and the personal position in controlling. The aim is rather to accompany the reader in the concrete implementation than to present a uniform guide.
Geraint Thomas's inside guide to twenty-five of the greatest cycling climbs in the world. Cycling fans obsess about climbs and big mountains. They love reading about their tests and tribulations and they love to ride them - a cricket lover can never bat at Lord's, or a football supporter score at Wembley, but any rider can take on the challenge of an iconic mountain. There have been fine books about the big climbs before but never from the voice of an elite GC winner, taking you inside what these climbs really feel like, where the attacks come, where the pain kicks in. From best-known big-hitters, via pro-peloton favourites, to the secret climbs Geraint has come to love, and featuring Australia, Belgium, France, the Netherlands, Mallorca and Wales, this is the cyclist's secret manual.
Are your children being taught scientific "proofs" that have already been disproven? Much of the world has been convinced to abandon God because of a few classic "proofs of evolution" in schoolbooks. The Vanishing Proofs of Evolution shows how one after another of these very convincing "proofs" has been found to be untrue. Don't just stand and watch while your kids and their teachers are being deceived. Give them the knowledge that will build their faith and help them help others. It's all explained in this scientifically-sound book, which clearly shows that true science supports the Creation position and disproves evolution. The book presents powerful evidence that God is the Creator, and concludes with an introduction to Him. Discover how easy it can be to defend the Creation position. Recommendation: “The Vanishing Proofs of Evolution” is an excellent source of the positive evidence for creation while describing the scientific evidence against the theory of evolution." (Duane Gish, Ph.D, Vice President, Institute for Creation Research.)
From the author of Da Nang Diary: A military history of the Battle of Hamburger Hill and other fights between the NVA and the US and its Vietnamese allies. Throughout the Vietnam War, one focal point persisted where the Viet Cong guerrillas and Army of the Republic of Viet Nam (ARVN) were not a major factor, but where the trained professionals of the North Vietnamese and US armies repeatedly fought head-to-head. A Shau Valor is a thorough study of nine years of American combat operations encompassing the crucial frontier valley and a fifteen-mile radius around it―the most deadly killing ground of the entire war. Beginning in 1963, Special Forces A-teams established camps along the valley floor, followed by a number of top-secret Project Delta reconnaissance missions through 1967. Then, US Army and Marine Corps maneuver battalions engaged in a series of sometimes-controversial thrusts into the A Shau, designed to disrupt NVA infiltrations and to kill enemy soldiers, part of what came to be known as Westmoreland’s “war of attrition.” The various campaigns included Operation Pirous (1967); Operations Delaware and Somerset Plain (1968); and Operations Dewey Canyon, Massachusetts Striker, and Apache Snow (1969)―which included the infamous battle for Hamburger Hill―culminating with Operation Texas Star and the vicious fight for and humiliating evacuation of Fire Support Base Ripcord in the summer of 1970, the last major US battle of the war. By 1971, the fighting had once again shifted to the realm of small Special Forces reconnaissance teams assigned to the ultra-secret Studies and Observations Group (SOG). Other works have focused on individual battles or units, but A Shau Valor is the first to study the campaign―for all its courage and sacrifice―chronologically and within the context of other historical, political, and cultural events.
The first major biography of the 1972 U.S. presidential candidate and unsung champion of American liberalism The Rise of a Prairie Statesman is the first volume of a major biography of the 1972 Democratic presidential candidate who became America's most eloquent and prescient critic of the Vietnam War. In this masterful book, Thomas Knock traces George McGovern's life from his rustic boyhood in a South Dakota prairie town during the Depression to his rise to the pinnacle of politics at the 1968 Democratic National Convention in Chicago where police and antiwar demonstrators clashed in the city's streets. Drawing extensively on McGovern's private papers and scores of in-depth interviews, Knock shows how McGovern's importance to the Democratic Party and American liberalism extended far beyond his 1972 presidential campaign, and how the story of postwar American politics is about more than just the rise of the New Right. He vividly describes McGovern's harrowing missions over Nazi Germany as a B-24 bomber pilot, and reveals how McGovern's combat experiences motivated him to earn a PhD in history and stoked his ambition to run for Congress. When President Kennedy appointed him director of Food for Peace in 1961, McGovern engineered a vast expansion of the program's school lunch initiative that soon was feeding tens of millions of hungry children around the world. As a senator, he delivered his courageous and unrelenting critique of Lyndon Johnson's escalation in Vietnam—a conflict that brought their party to disaster and caused a new generation of Democrats to turn to McGovern for leadership. A stunning achievement, The Rise of a Prairie Statesman ends in 1968, in the wake of the assassinations of Martin Luther King and Robert Kennedy, when the "Draft McGovern" movement thrust him into the national spotlight and the contest for the presidential nomination, culminating in his triumphal reelection to the Senate and his emergence as one of the most likely prospects for the Democratic nomination in 1972..
Help students to apply their mathematical skills in real-life contexts, as they learn and develop through TeeJay's fun and accessible approach to SQA National 4 Applications of Maths. This book provides hundreds of practice questions, with progression and consolidation - the core TeeJay philosophy - underpinning every exercise and chapter. br” Contains three freestanding study areas covering Numeracy, Geometry & Measure and Finance & Statistics
Skiing requires great control, whether the skier is competitive or recreational. This book teaches total control of the body to achieve and maintain balance in motion. It shows that for performance skiing command of the body is more important than a flashy powder suit or stretch neon.
Crystal growth far from thermodynamic equilibrium is nothing but homoepitaxy - thin film growth on a crystalline substrate of the same material. Because of the absence of misfit effects, homoepitaxy is an ideal playground to study growth kinetics in its pure form. Despite its conceptual simplicity, homoepitaxy gives rise to a wide range of patterns. This book explains the formation of such patterns in terms of elementary atomic processes, using the well-studied Pt/Pt(111) system as a reference point and a large number of Scanning Tunneling Microscopy images for visualization. Topics include surface diffusion, nucleation theory, island shapes, mound formation and coarsening, and layer-by-layer growth. A separate chapter is dedicated to describing the main experimental and theoretical methods.
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