8th October, 2020
Following are some of the most frequently asked Chef DevOps interview questions in the interview, here are the answers for them.
Most frequently asked Chef Devops Interview Questions
Ans: The chef is a configuration management tool for dealing with machine setup on physical servers, virtual machines, and in the cloud.
Ans: A Node represents a server and is typically a virtual machine, container instance, or physical server – basically any computing resource in your infrastructure that is managed by Chef.
Ans: The chef is a powerful automation platform that transforms infrastructure into code.s The Chef server acts as a hub for configuration data.
Ans: The Chef server acts as a hub for configuration data. The Chef server stores cookbooks, the policies that are applied to nodes, and metadata that describes each registered node that is being managed by Chef. Nodes use the Chef client to ask the Chef server for configuration details, such as recipes, templates, and file distributions.
Ans: An SSL certificate is used between the chef-client and the Chef server to ensure that each node has access to the right data.
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Ans: Use the SSL_CERT_FILE environment variable to specify the location for the SSL certificate authority (CA) bundle that is used by the chef-client.
Ans: Run the knife ssl check subcommand to verify the state of the SSL certificate, and then use the response to help troubleshoot issues that may be present.
Ans: A file resource is used to manage files directly on a node.
A file resource block manages files that exist on nodes. For example, to write the home page for an Apache website:
file ‘/var/www/customers/public_html/index.php’ do content ‘<html>This is a placeholder for the home page.</html>’ mode ‘0755’ owner ‘web_admin’ group ‘web_admin’ end
Ans: A data bag is a global variable that is stored as JSON data and is accessible from a Chef server. A data bag is indexed for searching and can be loaded by a recipe or accessed during a search.
Ans: Use the chef_acl resource to interact with access control lists (ACLs) that exist on the Chef server.
Syntax: The syntax for using the chef_acl resource in a recipe is as follows:
chef_acl ‘name’ do attribute ‘value’ # see properties section below … action :action # see actions section below end
Ans: Just mention the information you need in order to bootstrap:
Ans: You can directly mention the command to upload a cookbook to the Chef server “knife cookbook upload”.
Ans: run-list lets you specify which Recipes to run, and the order in which to run them. The run-list is important when you have multiple Cookbooks and the order in which they run matters.
Depending on the discussion if you think more explanation is required just mention the below points
A run-list is:
Ans: There are three ways to apply an updated Cookbook to a node you can mention all or anyone, I will suggest you mention all three:
Ans: Use the below Resource to stop and disable the httpd service from starting when system boots.
service 'httpd' do action [:stop, :disable] end
Ans: package 'httpd' service 'httpd' do action [:enable, :start] end
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