How to explain the concept of GitOps and its main principles?

GitOps is a methodology for managing infrastructure and applications based on using Git as the single source of truth. The main idea is that all changes to infrastructure and configurations are stored in a Git repository, and automated processes (such as CI/CD pipelines or Kubernetes operators) monitor the system's state and bring it into compliance with the description in Git.

Main principles of GitOps:

• Declarativeness: the system state is described declaratively (e.g., in YAML manifests).
• Versioning: all changes are recorded in Git, providing history and rollback capabilities.
• Automation: deployment and update processes are automated and respond to changes in the repository.
• Observability: the system constantly monitors its state and reports discrepancies with the description in Git.

Example: when a configuration change is made in the Git repository, an automatic process updates the Kubernetes cluster to match the new description.