Erika Heidi In a nutshell, server configuration management also popularly referred to as IT Automation is a solution for turning your infrastructure administration into a codebase, describing all processes necessary for deploying a server in a set of provisioning scripts that can be versioned and easily reused. It can greatly improve the integrity of any server infrastructure over time. In a previous guidewe talked about the main benefits of implementing a configuration management strategy for your server infrastructure, how configuration management tools work, and what these tools typically have in common.
Justin Ellingwood Introduction Chef is a configuration management system designed to allow you to automate and control vast numbers of computers in an automated, reliable, and scalable manner. In previous tutorials, we have looked at some common Chef terminology and discussed how to install a Chef server, workstation, and nodes with Chef 12 or Chef In this guide, we will use these guides as a jumping off point to begin talking about how to automate your environment.
In this article, we will discuss the basics of creating a Chef cookbook.
Cookbooks are the configuration units that allow us to configure and perform specific tasks within Chef on our remote nodes. We build cookbooks and then tell Chef which nodes we want to run the steps outlined in the cookbook. In this guide, we will assume that you are starting with the three machines that we ended the last lesson with.
You should have a server, a workstation, and at least one node to push configuration changes to. Basic Cookbook Concepts Cookbooks serve as the fundamental unit of configuration and policy details that Chef uses to bring a node into a specific state. This just means that Chef uses cookbooks to perform work and make sure things are as they should be on the node.
Cookbooks are usually used to handle one specific service, application, or functionality. For instance, a cookbook can be created to use NTP to set and sync the node's time with a specific server.
It may install and configure a database application. 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 node's "run-list". A run-list is a sequential list of recipes and roles that are run on a node by chef-client in order to bring the node into compliance with the policy you set for it.
In this way, the configuration details that you write in your cookbook are applied to the nodes you want to adhere to the scenario described in the cookbook. Cookbooks are organized in a directory structure that is completely self-contained.
There are many different directories and files that are used for different purposes.
Let's go over some of the more important ones now. Recipes A recipe is the main workhorse of the cookbook. A cookbook can contain more than one recipe, or depend on outside recipes.
Recipes are used to declare the state of different resources. Chef resources describe a part of the system and its desired state. For instance, a resource could say "the package x should be installed".
Another resource may say "the x service should be running".The enclosed document can provide a good starting point for your catering arrangement.
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Configuration Management Writing Chef Recipes April 14, This tutorial will walk you through the process of automating server provisioning using Chef, a powerful configuration management tool that leverages the Ruby programming language to automate infrastructure administration and provisioning.
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Chef is a configuration management system designed to allow you to automate and control vast numbers of computers in an automated, reliable, and scalable manner. In this article, we will discuss the basics of creating a Chef cookbook.
Cookbooks are the configuration units that allow us to configure. Writing an Effective Business Document In the professional world, writing well is a key to being a success.
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