What is chef OHAI?
What is chef 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 recipe in chef?
Recipe: a file that contains a set of instructions (resources) to be executed. A recipe must be contained inside a Cookbook. Resource: a portion of code that declares an element of the system and what action should be executed.
How do chefs create the environment?
Chef – Environment
- Creating an Environment. Creation of environment on the fly can be done using the knife utility.
- Testing a Created Environment.
- List Node for All Environments.
- _default Environment.
- Environment Attributes.
- Attribute Type.
- Order of Applying an Attribute.
What are the chef shell modes?
We can run Chef-Shell in three different modes: Standalone mode, Client mode, and Solo mode. Standalone mode − It is the default mode. No cookbooks are loaded, and the run-list is empty. Client mode − Here, the chef-shell acts as a chef-client.
What is bootstrap in chef?
A bootstrap is a process that installs the chef-client on a target system so that it can run as a chef-client and communicate with a Chef Server.
What are attributes in chef?
An attribute is a specific detail about a node. Attributes are used by the chef-client to understand: The current state of the node. What the state of the node was at the end of the previous chef-client run.
What are attributes in Chef?
What is the difference between cookbook and recipe?
Instead of focusing on direct recipes, cooking books are more devoted to techniques or even the science of cooking and flavor. Each cooking book isn’t a carbon copy of the other, though. They all teach a deeper understanding of cooking a little differently, so each is helpful in their own way.
How do I set environment variables in Chef?
Setting Environment Variable Using Chef Recipe Step 1 − Update the default recipe of cookbook with an environment variable. Step 2 − Upload the updated cookbook to the server. Step 3 − Running the Chef client to create a temp file. user@server:~$ sudo chef-client …
How do chefs create roles?
Create a Role Using the Ruby DSL We can create roles using the roles directory in our chef-repo directory on our workstation. Within this directory, we can create different files that define the roles we want in our organization. Each role file can be written either in Chef’s Ruby DSL, or in JSON.
Where are chef logs stored?
The log file name includes the node name, as well as, an integer time stamp. Up to 44 log files are kept for each node in the /var/log/icm-deployer/nodes folder on the Chef server.
How do I debug a chef-client?
Some more complex ways to debug issues with a chef-client run include:
- Using the chef_handler cookbook.
- Using the chef-shell and the breakpoint resource to add breakpoints to recipes, and to then step through the recipes using the breakpoints.