How do you execute a command in a Chefs recipe?
Use the script resource to execute a script using a specific interpreter (Ruby, Python, Perl, csh, or Bash). execute is the resource. name is the name given to the resource block. action identifies which steps Chef Infra Client will take to bring the node into the desired state.
What are resources in Chef?
Chef resource represents a piece of the operating system at its desired state. It is a statement of configuration policy that describes the desired state of a node to which one wants to take the current configuration to using resource providers.
What are phases of Chef execution?
There are two phases to a Chef client run. the ruby is loaded, node attributes are resolved and a run list generated. Next is the execution phase, where the recipes in the run list are executed. How to Force the order of recipes with Chef?.
How do you create a recipe in Chef?
Implementation Steps Create cookbooks. Create a new cookbook ktexperts-cookbookinside the cookbooks. Create a new recipe ktexperts-recipe inside the cookbook ktexperts-cookbook. Go to cookbooks. Open the Recipe ktexperts-recipe. Verify syntax of recipe. Execute the recipe Locally/Call chef-client.
What is chef exec?
The chef executable is a command-line tool that does the following: Generates repositories, cookbooks, recipes, attributes, templates, and custom resources. Installs gems into the Chef development environments Ruby installation.
What is chef command?
Knife is Chefs command-line tool to interact with the Chef server. One uses it for uploading cookbooks and managing other aspects of Chef. It provides an interface between the chefDK (Repo) on the local machine and the Chef server. It helps in managing ? Chef nodes.
What is resource in recipe?
A resource is a statement of configuration policy that: Describes the desired state for a configuration item. Lists additional details (also known as resource properties), as necessary. Are grouped into recipes, which describe working configurations.
What is attribute in chef?
An attribute is a specific detail about a node. Attributes are used by the chef-client to understand: The current state of the node. What the state of the node was at the end of the previous chef-client run.
What is chef and how it works?
Chef is a declarative configuration management and automation platform used to translate infrastructure into code. This enables a development and deployment process with better testing, efficient and predictable deployments, centralized versioning, and reproducible environments across all servers.
What is converge in Chef?
Convergence is when the configuration management system brings the node into compliance with policy. In other words, the node is configured based on the roles and recipes in its run list. Convergence in Chef happens in two phases. Compile. Execute.
What is Chef template?
Chef uses templates to be able to fill the configuration file with dynamic values. Chef provides templates as a resource which can be used in the recipe.
How does a Chef client work?
A chef-client is an agent that runs locally on every node that is under management by Chef. When a chef-client is run, it will perform all of the steps that are required to bring the node into the expected state, including: Registering and authenticating the node with the Chef server.
What is recipe in Devops?
A recipe is basically a collection of resource definitions that will create a step-by-step set of instructions to be executed by the nodes. These resource definitions can be mixed with Ruby code for more flexibility and modularity.
What is recipe in Chef tool?
A recipe is a file that contains Chef code. Using your favorite text editor, create the recipe file hello. This file can be anywhereno specific directory structure is required. By convention, files that contain Chef code have the extension . rb to show they are written in Ruby.
How do you make a Chef repossession?
Download/install Chef DevKit. Add chef and ruby to your path (if not already done, see below for more info) $ chef generate repo chef-repo (note: last argument is name for your chef repo).
How does a chef cookbook work?
Cookbooks are basically packages for infrastructure choices. Cookbooks are created on the workstation and then uploaded to a Chef server. From there, recipes and policies described within the cookbook can be assigned to nodes as part of the nodes run-list.
What is chefs knife command?
knife is a command-line tool that provides an interface between a local chef-repo and the Chef Infra Server. knife helps users to manage: Nodes. Cookbooks and recipes.
What is chef Shell?
chef-shell is a recipe debugging tool that allows the use of breakpoints within recipes. chef-shell runs as an Interactive Ruby (IRb) session. chef-shell supports both recipe and attribute file syntax, as well as interactive debugging features. The chef-shell executable is run as a command-line tool.
What is the difference between recipe and cookbook?
As nouns the difference between recipe and cookbook is that recipe is (medicine|archaic) a formula for preparing or using a medicine; a prescription; also, a medicine prepared from such instructions while cookbook is a book or an encyclopedia of recipes and cookery tips.
How do you write a chef cookbook?
The first thing to do when writing a cookbook is to create the cookbook directory structure with knife cookbook create . This command will create a README. rdoc by default, and I prefer Markdown, so I specify the -r md option.
What is chef client command?
A chef-client is an agent that runs locally on every node that is under management by Chef. When a chef-client is run, it will perform all of the steps that are required to bring the node into the expected state, including: Registering and authenticating the node with the Chef server. Building the node object.