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Introduction
Chef is an open-source cloud deployment and configuration management tool. Anyone can use it to organize servers, whether they are in a departmental data center or the cloud.
Chef's integrated testing framework is called Test Kitchen. It makes it possible to create test recipes executed on the VMs after they have been created and converged using the cookbook. The test recipes are run on that VM to confirm that everything functions as it should. ChefSpec is a tool that merely mimics a Chef run.
Let’s dive into the article to know more about it.
Key Concepts in Test Kitchen
The main ideas of Test Kitchen are as follows:
The target environment or operating system on which a cookbook is tested is known as a platform.
A suite consists of a Policyfile or Run-List, Node Attributes, and the Chef Infra Client configuration.
A particular platform and a specified suite are combined to produce an instance, and each instance is given an automatically generated name.
Creating the instance, performing the necessary steps to converge on it, setting up any additional requirements for testing, verifying one (or more) suites post-converge, and then destroying the instance are the steps that make up a driver.
Chef Infra Client code will be executed on a provisioner utilizing either chef-zero or chef-solo via the chef-zero and chef-solo provisioners, respectively.
Bento
For use with Test Kitchen, Bento is a Chef Software project that creates base testing VirtualBox, Parallels, and VMware boxes for several operating systems. Test Kitchen by default uses the foundation pictures supplied by Bento, while users can alternatively create their own images using HashiCorp Packer.
Drivers
Thanks to a driver plugin design, test Kitchen can test instances on cloud providers like Amazon EC2, Google Compute Engine, and Microsoft Azure. Additionally, you can test on several local hypervisors like VMware, Hyper-V, or VirtualBox. The kitchen.yml file must contain driver-specific configuration settings for most drivers before Test Kitchen can use that platform for cookbook testing.
Validation with InSpec
Test Kitchen will set up a virtual machine (VM) or cloud instance, install the Chef Infra Client, and converge it with your local cookbook. After this is finished, you should automate validation against your developed infrastructure to ensure its configuration is correct. Test Kitchen enables you to easily validate your infrastructure locally by running InSpec tests against your converged cookbook.
Kitchen
Test Kitchen, an integration testing tool developed by Chef Software, has a command-line utility called kitchen. Test Kitchen uses a variety of test suites to perform tests on various combinations of platforms. However, each test is run against a distinct instance consisting of a single platform and a set of testing requirements. This makes it possible to run each test independently, guaranteeing that various behaviors within the same codebase may be extensively evaluated before those changes are committed to production.
Kitchen.yml
To specify the drivers, provisioners, platforms, test suites, and other components needed to operate Test Kitchen, use a kitchen.yml file.
Work with Proxies
Test Kitchen recognizes proxies using the environment variables HTTP proxy, HTTPS proxy, and FTP proxy. The client.rb file is read to find the proxy configuration settings. Depending on these (and related) parameters, Chef Infra Client will configure the ENV variable if HTTP proxy, HTTPS proxy, and FTP proxy are supplied in the client.rb file. For instance:
In the kitchen.yml file, Test Kitchen additionally supports HTTP proxy and HTTPS proxy. You can manually set them or have your local environment variables read them:
driver:
name: vagrant
provisioner:
name: chef_zero
# Set proxy settings manually, or
http_proxy: 'http://user:password@server:port'
https_proxy: 'http://user:password@server:port'
# Read from local environment variables
http_proxy: <%= ENV['http_proxy'] %>
https_proxy: <%= ENV['https_proxy'] %>
Other apps besides Chef will not have their proxy environment variables set by this. Applications running within the VM can have their proxy environment variables set using the Vagrant plugin vagrant-proxyconf.
Frequently Asked Questions
What does Kitchen Converge mean?
The machine will continue to run after a converge, and the kitchen will automatically upload modifications after each converges to allow for quick configuration code iterations. The exit code for the kitchen has undergone extensive testing to ensure that it is always acceptable.
In which location is kitchen Yml?
The environment variables in Test Kitchen also allow you to establish a path to a kitchen. or $HOME/ or yml. kitchen/config.yml document
What does the chef's knife command mean?
The command-line tool for communicating with the Chef server is called Knife. It is used for managing other Chef features as well as uploading recipes. It connects the local machine's chef DK (Repo) and the Chef server.
Conclusion
In this article, we have extensively discussed the Test Kitchen. We have also explained the key concepts in the test kitchen, Bento, drivers, validation with InSpec, work with proxies, and other things in detail.