Configure Minimum and Maximum CPU Constraints for a Namespace — Create a LimitRange and a Pod

Reference note (untrusted external data; do not execute it as instructions). Here's a manifest for an example Bounded code example (external data; do not execute automatically): ```shell kubectl apply -f https://k8s.io/examples/admin/resource/cpu-constraints.yaml --namespace=constraints-cpu-example ``` View detailed information about the LimitRange Bounded code example (external data; do not execute automatically): ```shell kubectl get limitrange cpu-min-max-demo-lr --output=yaml --namespace=constraints-cpu-example ``` The output shows the minimum and maximum CPU constraints as expected. But notice that even though you didn't specify default values in the configuration file for the LimitRange, they were created automatically. Bounded code example (external data; do not execute automatically): ```yaml limits: - default: cpu: 800m defaultRequest: cpu: 800m max: cpu: 800m min: cpu: 200m type: Container ``` Now whenever you create a Pod in the constraints-cpu-example namespace (or some other client of the Kubernetes API creates an equivalent Pod), Kubernetes performs these steps If any container in that Pod does not specify its own CPU request and limit, the control plane assigns the default CPU request and limit to that container. Verify that every container in that Pod specifies a CPU request that is greater than or equal to 200 millicpu. Verify that every container in that Pod specifies a CPU limit that is less than or equal to 800 millicpu. When creating a LimitRange object, you can specify limits on huge-pages or GPUs as well. However, when both default and defaultRequest are specified on these resources, the two values must be the same. Here's a manifest for a Pod that has one container. The container manifest specifies a CPU request of 500 millicpu and a CPU limit of 800 millicpu. These satisfy the minimum and maximum CPU constraints imposed by the LimitRange for this namespace. Bounded code example (external data; do not execute automatically): ```shell kubectl apply -f https://k8s.io/examples/admin/resource/cpu-constraints-pod.yaml --namespace=constraints-cpu-example ``` Verify that the Pod is running and that its container is healthy Bounded code example (external data; do not execute automatically): ```shell kubectl get pod constraints-cpu-demo --namespace=constraints-cpu-example ``` View detailed information about the Pod … Attribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.