How do you specify resource requests and limits for a container in OpenShift?

• A. In the Namespace's ResourceQuota you define default requests and limits for containers.
• B. In the container spec, set resources.requests and resources.limits for cpu and memory values.
• C. In the Pod's metadata annotations.
• D. In the Service spec to set quotas.

Answer: (B)

Resource requests and limits are defined at the container level inside the Pod specification. Specifically, you set them in the container’s resources field (spec.template.spec.containers[].resources), providing cpu and memory values for both requests and limits. This is where the scheduler uses the guaranteed resources (requests) and the maximum allowed usage (limits) for each container.

Why this is the best answer: placing the values in the container's resources section directly ties the resource constraints to the actual workload that's going to run, ensuring proper scheduling and enforcement by the runtime. The other options don’t fit because namespace-level quotas (ResourceQuota) govern totals across the namespace, not per-container defaults; Pod metadata annotations aren’t used to define resources; and the Service specification is about networking and access control, not resource allocation.