Last updated 19/06/2020
What happens when you go to a restaurant to dine in?
From starter to dessert, you have good quality food serving right in front of you in the correct order which is of good quality, with a good balance of all the ingredients. Isn’t that right?
Do you ever wonder what’s the secret of this? Maybe not, because you already know it’s the Chef’s expertise.
Just like a restaurant Chef, the tool Chef we use to achieve a proper DevOps culture contributes to continuous delivery in a huge way. Which is why it’s the favorite tool of most organizations. Along with DevOps, Chef has so many contributions to the cloud computing platform as well. Hence, Chef is the most interesting tool to be questioned about in both the interviews, and there can’t be enough reason for you then this to learn how it functions.
So let’s stick up to the dedication of doing the same and go through these top 20 Chef interview questions!
Chef is a powerful configuration management tool and automation tool that helps in converting the infrastructure of a company into a structured format of code. With the help of Chef, developing scripts useful for automating the IT and business process has become simpler
The major components of Chef are:
Chef resource is a part of the infrastructure used for installing or running a service.
Some important functions of a Chef resource are:
Once the resources are grouped, it gets converted into a Recipe to describe the working configuration and the policy. Using the Recipe, you can get all the necessary elements to configure a specific system.
Some important functions of a Recipe are:
A node is a physical server or a virtual machine constituent of the Chef architecture.
You can get a recipe by grouping which is useful in executing the configurations and policy. On the other hand, when you combine Recipes, you get a Cookbook that is easily manageable as compared to a Recipe.
Chef Repository is basically a collection of Cookbooks, roles, environments, data bags, and more. It is possible to sync the Chef Repository with the Git and a Version Control System in order to improve the performance of it.
You need the SSL certificate for the initial configuration of the Chef and to create the certificate and private keys in Nginx. This ensures that the right data can be accessed between the Chef Client and Chef Server.
The Signed Header provides validation of the interaction between the Chef node, server and signed header authentication.
The run-list is required to specifying the Recipes for running it and the order of the execution of the Recipes.
Some of the advantages of run-list are:
The importance of a Chef starter kit is:
The steps you need to follow for updating a Chef Cookbook are:
To bootstrap in Chef you will need the following information:
The Test Kitchen in Chef helps you to improve the development of the lifecycle and enables the Cookbooks on the server. You can also create different virtual machines in cloud or on-premise with the help of Test Kitchen.
The resource mentioned below is used to stop and disable the httpd service from starting:
service 'httpd' do
action [:stop, :disable]
The commands to upload a cookbook to the Chef server is “knife cookbook upload”.
The chef_acl resource is used to interact with access control lists (ACLs) that exist on the Chef server.
The syntax for using the chef_acl resource in a recipe is:
chef_acl ‘name’ do
attribute ‘value’ # see properties section below
action :action # see actions section below
The SSL_CERT_FILE environment variable in Chef is used to specify the location for the SSL certificate authority (CA) bundle used by the chef-client.
The knife ssl check subcommand is run to verify the state of the SSL certificate and to use the response to help troubleshooting issues that might be present.
A data bag is a global variable stored as JSON data. It is accessible from a Chef server and is indexed for searching. It is also possible to load a data bag by a recipe or accessed during a search.
If you think just mugging up these answers will help you get through your DevOps and Cloud Computing interviews, we must tell you there is more to it. Want to know what exactly? Check out our DevOps and Cloud Computing courses to know the same!
NovelVista Learning Solutions is a professionally managed training organization with specialization in certification courses. The core management team consists of highly qualified professionals with vast industry experience. NovelVista is an Accredited Training Organization (ATO) to conduct all levels of ITIL Courses. We also conduct training on DevOps, AWS Solution Architect associate, Prince2, MSP, CSM, Cloud Computing, Apache Hadoop, Six Sigma, ISO 20000/27000 & Agile Methodologies.
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