Extending Puppet -- Table of Contents -- Extending Puppet -- Credits -- Foreword -- About the Author -- Acknowledgments -- About the Reviewers -- www.PacktPub.com -- Support files, eBooks, discount offers, and more -- Why subscribe? -- Free access for Packt account holders -- Preface -- What this book covers -- What you need for this book -- Who this book is for -- Conventions -- Reader feedback -- Customer support -- Downloading the example code -- Errata -- Piracy -- Questions -- 1. Puppet Essentials -- The Puppet ecosystem -- Why configuration management matters -- Puppet components -- Installation and configuration -- Puppet in action -- Resources -- The resource abstraction layer -- Nodes -- Classes and defines -- Class inheritance -- Resource defaults -- Resource references -- Variables, facts, and scopes -- System's facts -- User variables in Puppet DSL -- User variables in an ENC -- User variables in Hiera -- Puppet's built-in variables -- A variable's scope -- Meta parameters -- Managing order and dependencies -- Run stages -- Reserved names and allowed characters -- Conditionals -- Comparison operators -- The In operator -- Expressions combinations -- Exported resources -- Virtual resources -- Modules -- The paths of a module and autoloading -- ERB templates -- Restoring files from a filebucket -- Summary -- 2. Hiera -- Installing and configuring Hiera -- Global settings -- Backend-specific settings -- The hiera.yaml examples -- Working with the command line on a YAML backend -- Using Hiera in Puppet -- Dealing with hashes in the Puppet code -- Puppet 3 automatic parameter lookup -- Evolving usage patterns for class parameters -- Additional Hiera backends -- The hiera-file backend -- The hiera-gpg backend -- The hiera-eyaml backend -- The hiera-http and hiera-mysql backends -- Using Hiera as an ENC -- Summary -- 3. PuppetDB.

Installation and configuration -- PuppetDB configurations -- The init script configuration -- Configuration settings -- Logging configuration -- Configurations on the Puppet Master -- Dashboards -- PuppetDB performance dashboard -- Puppetboard - query PuppetDB from the Web -- The PuppetDB API -- Querying PuppetDB (Read) -- The PuppetDB commands (Write) -- Querying PuppetDB for fun and profit -- The /facts endpoint -- The /resources endpoint -- The /nodes endpoint -- The /catalogs endpoint -- The /facts-names endpoint -- The /metrics endpoint -- The /reports endpoint -- The /events endpoint -- The /event-counts endpoint -- The /aggregated-event-counts endpoint -- The /server-time endpoint -- The /version endpoint -- The puppetdbquery module -- Query format -- Query from the command line -- Query from Puppet manifests -- The PuppetDB Hiera backend -- How Puppet code may change in the future -- Summary -- 4. Designing Puppet Architectures -- The components of Puppet architecture -- Defining the classes to include in each node -- Defining the parameters to use for each node -- Defining the configuration files provided to the nodes -- Defining custom resources and classes -- The Foreman -- Roles and profiles -- The data and the code -- Sample architectures -- The default approach -- Basic ENC, logic in the site module, and Hiera backend -- The Foreman and Hiera -- The Hiera-based setup -- The Hiera-only setup -- Foreman smart variables -- Fact-driven truths -- Nodeless site.pp -- Node inheritance done right -- Summary -- 5. Using and Writing Reusable Modules -- The evolution of modules' layouts -- Class parameters - from zero to data bindings -- The params pattern -- Data in modules -- Files and class names -- The anchor pattern -- The parameters dilemma -- Naming standards -- Reusability patterns -- Managing files -- Managing configuration hash patterns.

Managing multiple configuration files -- Managing users and dependencies -- Managing the installation options -- Managing extra resources -- Summary -- 6. Higher Abstraction Modules -- Understanding the need for higher abstractions -- The OpenStack example -- Component (application) modules -- Raising abstraction - the official openstack module -- Raising abstraction - the Puppet Labs OpenStack module -- Raising abstraction - the scenario-based approach -- Taking an alternate approach -- An approach to reusable stack modules -- Summary -- 7. Deploying and Migrating Puppet -- Examining the potential scenarios and approaches -- New infrastructures -- Existing manually managed infrastructures -- Node migration -- Node update -- Existing automated infrastructures -- Upgrading the Puppet Master -- Patterns for extending Puppet coverage -- Raising the bar, step by step -- Knowing the territory -- Defining priorities -- Automate servers deployment -- Automate common configurations -- Automate the most important roles -- Refine and automate application deployments -- Integrate what already works well -- Automate monitoring -- Evaluating solutions -- Coding -- Applying changes -- Things change -- Infrastructure as code -- Versioning -- Reproducibility and predictability -- Testing -- Maintenance -- Evolution of the system administrator -- Designing a Puppet-friendly infrastructure -- Summary -- 8. Code Workflow Management -- Writing the Puppet code -- Geppetto -- Vim -- Git workflows -- Git's basic principles and commands -- Git hooks -- Environments and branches -- Branch-based automatic environments -- Simplified developer workdir environments -- Code review -- Gerrit -- Online resources for peer review -- Testing the Puppet code -- Using rspec-puppet -- rspec-system-puppet and Beaker -- Vagrant -- Deploying the Puppet code.

Using librarian-puppet for deployments -- Deploying code with r10k -- Propagating Puppet changes -- Puppet Continuous Integration tools -- Travis -- Jenkins -- Summary -- 9. Scaling Puppet Infrastructures -- Scaling Puppet -- As simple as puppet apply -- Default Puppet Master -- Puppet Master with Passenger -- Installing and configuring Passenger -- Multi-Master scaling -- Managing certificates -- Managing SSL termination -- Managing code and data -- Load balancing alternatives -- Masterless Puppet -- Configurations and infrastructure optimizations -- Traffic compression -- Caching -- Distributing Puppet execution times -- Checking the interval for changes in files -- Scaling stored configs -- Measuring performance -- Puppet metrics -- Optimizing code -- Testing different Puppet versions -- Summary -- 10. Writing Puppet Plugins -- Anatomy of a Puppet run, under the hood -- ENC and Hiera extendibility -- Modules' pluginsync -- Puppet indirector and its termini -- Custom functions -- Custom facts -- Ruby facts distributed via pluginsync -- External facts in the facts.d directory -- Custom types and providers -- Custom report handlers -- Custom faces -- Summary -- 11. Beyond the System -- Puppet on a network equipment -- A Proxy mode with the puppet device application -- Native Puppet on the network equipment -- Cisco onePK -- Juniper and netdev_stdlib -- Puppet for cloud and virtualization -- VMware -- VM provisioning on vCenter and vSphere -- The integration of vCloud Automation Center -- The configuration of vCenter -- Amazon Web Services -- Cloud provisioning on AWS -- AWS provisioning and configuration with resource types -- Managing CloudFormation -- Cloud provisioning on Google Compute Engine -- Puppet on storage devices -- Summary -- 12. Future Puppet -- Introducing the future parser -- Lambdas and Iterations.

Manipulating and validating hashes and arrays -- Other features -- Restrictions and backward incompatibilities -- Directory environments -- Heredoc support -- The new type system -- Other new features -- EPP Templates -- The contain function -- Serialization with MessagePack -- Improved error system -- Data in modules -- Facter 2 -- Trapperkeeper -- Summary -- Index.