So What is Chef? Chef serves as a robust configuration management tool. Let's dive into this concept. Imagine having a fleet of multiple servers in operation. This responsibility falls into the hands of system administrators who manage tasks like creation, management, and updates. However, when dealing with a substantial number, say 500 servers, this task becomes considerably intricate. This complexity is where the power of automation shines.
Now, let's explore the essence of configuration. It encompasses the minutiae of your machine, encompassing factors like version updates, metadata, permissions, and more. And then comes management, which involves the pivotal CRUD operations—Create, Read, Update, Delete.
Configuration management tools come in two primary types: pull-based and push-based. In the realm of push-based services, the servers take the initiative, sending update notifications directly to your device. This mechanism draws parallels to how tools like WhatsApp function. A notable example of this approach is Ansible, a tool highly regarded for its proficiency.
PUSH BASED
eg-Ansible ,Saltstack
PULL BASED
Server doesn't tell you to update you have to approach the server
pull configuration node checks with the server ,Periodically and fetches the configuration from it.
eg -:chef,puppet
chef is a configuration-management tool which is written in Ruby and Erlang
Configuration management tool turns your code into Infrastructure as code .So your code would be repeatable testable .
ADVANTAGES
- Complete Automation
- Increase up time
- Improve performance
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