Can you explain the concept of Infrastructure-as-Code and its main principles?

Infrastructure-as-Code (IaC) is a practice of managing and provisioning infrastructure through machine-readable configuration files, rather than manual setup processes. The main idea is to describe infrastructure (servers, networks, databases, etc.) in the form of code that can be versioned, tested, and automated.

Key principles of IaC:

• Declarativeness: describes the desired state of the infrastructure, not the sequence of actions to achieve it.
• Idempotency: applying the code repeatedly does not change the state if the infrastructure already matches the description.
• Automation: deployment and modification processes are automated, reducing the likelihood of errors.
• Versioning: configuration files are stored in version control systems, ensuring transparency and rollback capabilities.
• Repeatability: allows quick creation of identical environments for development, testing, and production.

Examples of IaC tools: Terraform, Ansible, CloudFormation. They enable describing infrastructure in code and managing it programmatically.