How does hiera work with puppet?

How does hiera work with puppet?

Hiera is a built-in key-value configuration data lookup system, used for separating data from Puppet code. Puppet’s strength is in reusable code. Code that serves many needs must be configurable: put site-specific information in external configuration data files, rather than in the code itself.

How is hiera organized?

Hiera looks up data by following a hierarchy — an ordered list of data sources. Hierarchies are configured in a hiera. yaml configuration file. Each level of the hierarchy tells Hiera how to access some kind of data source.

What is Hiera_include?

Hiera provides an interesting function called hiera_include , which allows users to include all the classes defined for a given key. This, in practice, exploits the Hiera flexibility to provide classes to nodes as an External Node Classifier does.

What is hiera Yaml?

The Hiera configuration file is called hiera. yaml . It configures the hierarchy for a given layer of data.

What is r10k puppet?

r10k is a code management tool that allows you to manage your environment configurations (such as production, testing, and development) in a source control repository.

How do I use Eyaml?

eyaml file in your VCS repository directory. You can use the eyaml command to input your sensitive data and receive an encrypted block. Next, copy and paste the text from after block: to the end of the block into yoursecure. eyaml file as you would any other Hiera yaml file.

What is Puppet code?

Puppet code is made up mostly of resource declarations. A resource describes a specific element about the system’s desired state. For example, it can include that a specific file should exist or a package should be installed. A Puppet program, called a manifest, has a file name that uses the “. pp” extension.

What is Puppetfile?

A Puppetfile is a formatted text file that specifies the modules and data that you want brought into your control repo. Typically, a Puppetfile controls content such as: Modules from the Forge. Modules from Git repositories. Data from Git repositories.

What is the latest version of Puppet?

Release notes

What is librarian puppet?

Librarian-puppet is a bundler for your puppet infrastructure. You can use librarian-puppet to manage the puppet modules your infrastructure depends on. It is based on Librarian, a framework for writing bundlers, which are tools that resolve, fetch, install, and isolate a project’s dependencies.

Is there a free version of Puppet?

Open source Puppet is free for use and open to modification and customization. You get a comprehensive tool with core CM capabilities and functionality out-of-the-box, and—if you possess the skill set— can be tweaked and improved upon directly through modifying its source code directly.

How do I set up Hiera in puppet?

Make a hiera.yaml config file. Arrange a hierarchy that fits your site and data. Write data sources. Use your Hiera data in Puppet. To get to grips with Hiera, it’s worth following the Puppet Labs complete example, in which the ntp service is configured. So we first need to install the ntp puppet module on the Puppet Master…

What are the advantages of using Hiera with puppet?

Hiera allows hierarchical configuration in Puppet, which is difficult to achieve with native Puppet code. Another major advantage is the separation of configuration data from the code, which makes everything generally easier. This is probably why Hiera comes bundled with Puppet Enterprise.

How can I test my Hiera configuration without repeated Puppet Agent runs?

To test this, we can run the hiera command line tool, which allows you to test your Hiera configuration without repeated puppet agent runs: # hiera ntp::service_ensure ::environment=uat stopped # hiera ntp::service_ensure ::environment=dev running

What happens before a lookup in Hiera?

Before a lookup, Hiera combines them into a single super-hierarchy: global → environment → module. Note: There is a fourth layer – default_hierarchy – that can be used in a module’s hiera.yaml. It only comes into effect when there is no data for a key in any of the other regular hierarchies