What is a Kubernetes Operator?
A Kubernetes Operator is a method of packaging, deploying, and managing a Kubernetes application. An Operator extends the Kubernetes API with custom resources and controllers, automating the management of applications and resources. Operators simplify the deployment and lifecycle management of complex applications on Kubernetes by encoding operational knowledge into software.
Operators leverage CRDs to define new types of resources that represent an application’s desired state. A custom controller, a vital operator component, manages these custom resources. The controller continuously monitors the state of the custom resource and performs necessary actions to reconcile the actual state with the desired state.
The concept of Operators was introduced to address the challenge of managing stateful applications on Kubernetes. Stateless applications, such as web servers, are relatively simple to operate using standard Kubernetes primitives....
