What is Cluster API in Kubernetes?

Cluster API is a Kubernetes project that provides a declarative way to manage the lifecycle of Kubernetes clusters and their infrastructure. It implements the Infrastructure as Code concept, allowing creation, updating, and deletion of clusters using standard Kubernetes resources and controllers.

Main features of Cluster API:

• Infrastructure management of clusters (virtual machines, networks, etc.) through providers (e.g., AWS, Azure, vSphere).
• Automation of cluster creation, scaling, and updates.
• Use of declarative manifests to describe the desired state of the cluster.

Example: you describe a cluster and its nodes in a YAML manifest, and Cluster API controllers create the corresponding resources in the cloud and configure the Kubernetes cluster automatically.

This significantly simplifies the management of multiple clusters and integration with CI/CD processes.