kitchen.yml Used to configure virtual environments for Test Kitchen Gemfile Bundler uses this file to configure the gem repository and the list of gems to down‐load. Bundler will automatically determine a gem’s dependencies by its references to other gems, so you need only list the top level gems you require. Gemfile.lock Records all the versions…
Example of .kitchen.yml for driver_plugin vagrant with ubuntu for Chef Test Kitchen
How to test Chef recipes/cookbooks on your workstation with VAGRANT and VirtualBox using Test Kitchen Install Test Kitchen, VAGRANT and VirtualBox: Chef Test Kitchen: Test Kitchen is a testing tool that can execute your CHEF recipes on one or more platforms in isolation. A driver plugin architecture is used which lets you run your recipes…
What is Chef Solo? chef-solo is a command that executes Chef Infra Client in a way that does not require the Chef Infra Server to converge cookbooks. chef-solo uses Chef Infra Client’s Chef local mode, and does not support the following functionality present in Chef Infra Client / server configurations: Centralized distribution of cookbooksA centralized…
What is Role? A role is a way to define certain patterns and processes that exist across nodes in an organization as belonging to a single job function. Each role consists of zero (or more) attributes and a run-list. Each node can have zero (or more) roles assigned to it. When a role is run…
The world has become more complex, moving from an industrial to a digital age. The ability to program opens up opportunities and skill sets that can be learned through practical experience. As software becomes central to all industries, learning basic understanding of programming by enrolling in online courses like python certification training courses and other…
What is the Fibonacci sequence? The Fibonacci sequence is a set of integers (the Fibonacci numbers) that starts with a zero, followed by a one, then by another one, and then by a series of steadily increasing numbers. The sequence follows the rule that each number is equal to the sum of the preceding two numbers….
What is Namespace in Python? A namespace is a collection of currently defined symbolic names along with information about the object that each name references. You can think of a namespace as a dictionary in which the keys are the object names and the values are the objects themselves. Each key-value pair maps a name…
Install Chef Workstation Configure Chef Workstation with Chef Infra Server using Knife
Guards A guard property can be used to evaluate the state of a node during the execution phase of a Chef Infra Client run. Based on the results of this evaluation, a guard property is then used to tell Chef Infra Client if it should continue executing a resource. A guard property accepts either a…
Chef notifies and subscribes explained with examples A notification is a property on a resource that listens to other resources in the resource collection and then takes actions based on the notification type (notifies or subscribes). Timers A timer specifies the point during the chef-client run at which a notification is run. The…
What is cookbook template (.erb) A cookbook template is an Embedded Ruby (ERB) template that is used to dynamically generate static text files. Templates may contain Ruby expressions and statements, and are a great way to manage configuration files. Use the template resource to add cookbook templates to recipes; place the corresponding Embedded Ruby (ERB)…
Ohai is a tool for collecting system configuration data, which it then provides to Chef Infra Client to use in cookbooks. Chef Infra Client runs Ohai at the start of every Chef Infra run to determine system state. The attributes that Ohai collects are called automatic attributes. Chef Infra Client uses these attributes to ensure…
Attributes represent information about your node. In addition to the information that can be automatically generated by ohai, you can set attributes in Chef recipes or in separate attribute files. Because attributes can be defined in multiple places, all attribute values are composed together during a Chef run according to the priority levels Attributes defined by ohai have…
Bash vs execute For a single script, use an execute. The bash resource is for including the script contents inline in the recipe code. Use the bash resource to execute scripts using the Bash interpreter. Commands that are executed with this resource are (by their nature) not idempotent, as they are typically unique to the…
Step 1 – Install & Verify Chef Workstation Step 2 – Write a following content in hello.rb Step 3 – Write a following content in hello.rb Run the executable in why-run mode, which is a type of Chef Infra Client run that does everything except modify the system. Use why-run mode to understand why the…
chef-apply chef-apply is an executable program that runs a single recipe from the command line. Is part of the Chef development kit. A great way to explore resources chef-apply is an executable program that runs a single recipe from the command line: Chef Automate Chef Automate is a centralized dashboard for following product of chef…
Introduction The web development segment in Australia has been growing for quite some time. And, truth be told, it’s about to improve even more. Hence, if you consider yourself to be a budding web developer, you probably are thinking about moving to the country too. But, how do you do it? Well, when it comes…