What is node attribute in Chef?

What is node attribute in Chef?

At the end of every chef-client run, the node object that defines the current state of the node is uploaded to the Chef server so that it can be indexed for search. We can specify the attribute at node level while running chef-client. Those attributes are referred to as node attributes.

What is the difference between Chef-solo and Chef zero?

Because Chef Zero runs in memory, it’s super fast and lightweight. This makes it perfect for testing against a “real” Chef Server without mocking the entire Internet. chef-solo is an open source version of the chef-client that allows using cookbooks with nodes without requiring access to a Chef server.

How do you override attributes in Chef?

Use the force_override attribute to ensure that an attribute defined in a cookbook (by an attribute file or by a recipe) takes precedence over an override attribute set by a role or an environment. An automatic attribute contains data that is identified by Ohai at the beginning of every chef-client run.

How do you set up a Chef-solo?

solo. rb Configuration

1. Step 1 − Create a solo.
2. Step 2 − Add the file to git repo.
3. Step 3 − Create a node.
4. Step 4 − Get the ntp cookbook inside the chef repo using knife.
5. Step 5 − Add the node.
6. Step 6 − Commit and push the files to git repo.
7. Step 1 − Login to the node where one wants to provision the Chef-Solo.

What is OHAI in Chef?

What is Ohai? Ohai is a tool that is used to collect system configuration data, which is provided to the chef-client for use within cookbooks. Ohai is run by the chef-client at the beginning of every Chef run to determine system state.

What is Chef_zero?

Chef Zero is a simple, easy-install, in-memory Chef server that can be useful for Chef Client testing and chef-solo-like tasks that require a full Chef Server. It IS intended to be simple, Chef 11+ compliant, easy to run and fast to start. It is NOT intended to be secure, scalable, performant or persistent.

What is Chef Infra?

Chef Infra is a configuration management tool for defining infrastructure as code (IAC), making the process of managing configurations and system state automated and testable.

How do chefs create the environment?

Chef – Environment

1. Creating an Environment. Creation of environment on the fly can be done using the knife utility.
2. Testing a Created Environment.
3. List Node for All Environments.
4. _default Environment.
5. Environment Attributes.
6. Attribute Type.
7. Order of Applying an Attribute.

Why is Ansible over Chef?

Chef has been around longer and is great for handling extremely complex tasks. Ansible is easier to install and use, and therefore is more limited in how difficult the tasks can be. It’s just a matter of understanding what’s important for your business, and that goes beyond a simply Ansible vs Chef exercise.

What are resources in Chef?

Chef resource represents a piece of the operating system at its desired state. It is a statement of configuration policy that describes the desired state of a node to which one wants to take the current configuration to using resource providers.

How many Collect_data block can a OHAI plugin have?

one collect_data block
It’s important to remember that within a plugin you can only define one collect_data block for each operating system— ohai will throw an error if you try to define two blocks with the :windows symbol, for example.

How do node-specific attributes work in chef-solo?

chef-solo does not interact with the Chef Infra Server. Consequently, node-specific attributes must be located in a JSON file on the target system, a remote location (such as Amazon Simple Storage Service (S3)), or a web server on the local network. The JSON file must also specify the recipes that are part of the run-list.

Where does chef-solo store its node objects?

When the tar.gz archive contains all of the cookbooks required by chef-solo, upload it to the web server from which chef-solo will access the archive. Unlike Chef Infra Client, where the node object is stored on the Chef Infra Server, chef-solo stores its node objects as JSON files on local disk.

How do I get the name of a node in chef?

The name of a node can be obtained from the node_name attribute in the client.rb file or by allowing Ohai to collect this data during a Chef Infra Client run. When Ohai collects this data during a Chef Infra Client run, it uses the node’s FQDN, which is always unique within an organization, as the name of the node.

How do I use chef solo with cookbook_PATH variable?

The cookbook_path variable in the solo.rb file must include both directories. For example: When the tar.gz archive contains all of the cookbooks required by chef-solo, upload it to the web server from which chef-solo will access the archive.