Mastering Kubernetes - Second Edition

The cloud-provider interface

The cloud-provider interface is a collection of Go data types and interfaces. It is defined in a file called cloud.go, available at http://bit.ly/2fq4NbW. Here is the main interface:

type Interface interface { 
    Initialize(clientBuilder controller.ControllerClientBuilder) 
    LoadBalancer() (LoadBalancer, bool) 
    Instances() (Instances, bool) 
    Zones() (Zones, bool) 
    Clusters() (Clusters, bool) 
    Routes() (Routes, bool) 
    ProviderName() string 
    HasClusterID() bool 
} 

This is very clear. Kubernetes operates in terms of instances, Zones, Clusters, and Routes, and also requires access to a load balancer and provider name. The main interface is primarily a gateway. Most methods return other interfaces.

For example, the Clusters