Where do the resources used to build Google Kubernetes Engine clusters come from?Bare-metal serversCloud StorageCompute EngineApp Engine

In the context of Google Kubernetes Engine (GKE), the resources used to build and manage Kubernetes clusters primarily come from Compute Engine. GKE utilizes Google Cloud's virtual machine instances (VMs) managed by Compute Engine to run the pods and services in the Kubernetes clusters.

Here’s a brief explanation of each of the options:

1. Bare-metal servers: GKE does not use bare-metal servers for its managed service; it primarily operates in a virtualized environment.

2. Cloud Storage: This service is used for object storage and is not directly associated with the infrastructure of GKE clusters but may be used for storing data that the applications within the clusters need.

3. Compute Engine: This is the correct answer. GKE leverages Compute Engine to provision and run the virtual machines that constitute the nodes of the Kubernetes clusters.

4. App Engine: This is a platform-as-a-service (PaaS) that allows developers to build and host applications but does not provide the underlying infrastructure for Kubernetes clusters.

In summary, the primary resource for building GKE clusters comes from Compute Engine, which provides the virtual machines necessary to host and manage containers in the Kubernetes environment.