| Goal |
- Sometimes you may need to use an external service like the ones typically offered by the cloud provider
- When you want to integrate RDS into your existing Kubernetes cluster, you need to be able to deal with it the same way you deal with any other Kubernetes resource
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| Service Catalog |
- Is an extension API that enables applications running inside the cluster to access applications and services provided by external sources, typically the cloud provider
- Kubernetes uses the Service Catalog to connect to the external provider using a Service Broker
- The Broker acts as an interface between the Service Catalog and the internals of the provided service
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| Architecture |
- Think of the Service Catalog as another Kubernetes cluster running inside the main one
- While Kubernetes has many types of resources, the Service Catalog offers only four resource types
- The Service Catalog can be managed and accessed by kubectl like any other Kubernetes resource. However, there is a command-line tool designed specifically to communicate with the Service Catalog called
svcat
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