Learning Chef: A Configuration Management and Automation Framework

By Mischa Taylor, Seth Vargo

Resolve configuration administration matters in organisations huge and small with Chef, the software program instrument that is helping approach directors get to the bottom of configuration difficulties and discover new avenues in automation, deployment, and orchestration. With this sensible advisor, you’ll quick research the fundamentals of Chef sooner than diving into advanced use cases.

Not will this publication aid you clear up distinct concerns, comparable to how one can deal with four hundred EC2 nodes, however it also will assist you comprehend the altering organizational politics and thought-processes that include infrastructure automation.

Gain a company knowing of Chef: Who created it and what difficulties does it solve?

Set up your laptop and workflow: fitting Chef could be a headache. There's no prescribed workflow that’s important for everyone.

Write customized recipes: simply because each infrastructure is varied, you'll have to write a customized recipe. Writing reliable cookbooks is important for having a sustainable infrastructure.

Tailor Chef on your infrastructure: finally, even customized recipes won't be adequate. You’ll are looking to expand the Chef’s middle performance.

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Roles offer the way to classify styles of use on your infrastructure. Roles can include attributes and an inventory of recipes and different roles as a run checklist. this lets you package deal the entire settings for a node configuration right into a unmarried position reference. within the subsequent and ultimate bankruptcy of this booklet, we’ll disguise environments, which supply a unique code of abstraction — the way to map your organization’s app deployment workflow to a suite of server configurations and cookbook types. bankruptcy 15. Environments Environments are a characteristic of Chef Server used to version the server configurations required in the course of every one part of your software program improvement lifecycle, as proven in determine 15-1. determine 15-1. Environments assessment Environments mirror your styles and workflow, and will be used to version the existence levels of your software, resembling: improvement trying out Staging creation each Chef Server begins out with a unmarried atmosphere, the _default surroundings. Environments may possibly comprise attributes beneficial for configuring your infrastructure, resembling: The URL of a money provider API the site of a package deal repository The model of Chef configuration records that are supposed to be used Environments permit for setting apart assets on a Chef Server simply because environments can include model constraints, not like with roles. Environments nonetheless have a use even if you will have try out Kitchen at your disposal, simply because you’ll may want to perform a little checking out opposed to servers on your creation surroundings. Create a Dev atmosphere Environments may be created and controlled within the similar style as info baggage and roles, prepared in a listing lower than chef-playground. The listing identify is environments by means of default. Use the chef-playground listing you created in bankruptcy eleven. Use a similar twin command advised setup you used there. begin the chef-zero server on an open port in a single window. we'll be utilizing port 9501 within the examples during this bankruptcy: $ chef-zero --port 9501 ensure that the chef-playground listing is the present operating listing: $ cd chef-playground Create an environments listing in chef-playground: $ mkdir environments We’re going to create a . json dossier representing the recent setting. A simple atmosphere has a reputation: and description:. Environments may have a number of cookbook constraints in addition. the facility to “pin” cookbooks to specific models is the main precious characteristic of environments. Create the dossier chef-playground/roles/dev. json containing the code supplied in instance 15-1. instance 15-1. chef-playground/environments/dev. json { "name": "dev", "description": "For builders! ", "cookbook_versions": { "apache": "= zero. 2. zero" }, "json_class": "Chef::Environment", "chef_type": "environment" } be aware There are different thoughts for a model constraint along with “equal to” (=). Equality is the steered perform. to benefit extra in regards to the different concepts, discuss with http://bit. ly/abt_cookbook_versions. Run knife setting from dossier passing within the dev. json dossier. knife atmosphere from dossier assumes dev.

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