# Limit the CPU utilization

By

Paul Tomoiu

●

In 

Kubernetes, 

CPU

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Published 2022-12-03

This tutorial explains how we can limit the CPU utilization by the containers in Kubernetes.

Kubernetes provides a shared pool of resources that it allocates based on how we configure our containerized applications.

By default, a pod in Kubernetes will run with no limits on CPU and memory in a default namespace. This can create problems related to contention for resources.

You can provide more information for the scheduler using two parameters that specify CPU utilization:

• Request : sets the minimum amount of CPU required for the container. Kubernetes aggregates all container requests into a single pod request. This information is used by the Scheduler to take a decision regarding where Kubernetes could deploy a pod.
• Limit : sets a maximum amount of allows CPU utilization by specifying a limit on the container.

Here we have an example of Pod definition using CPU limits in my-first-pod-cpu.yml file:

apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod-cpu
  labels:
    zone: prod
    version: v1
spec:
  containers:
  - name: nginx-c
    image: nginx:1.14.2
    ports:
    - containerPort: 8080
    resources:
      requests:
        cpu: "250m"
      limits:
        cpu: "500m"

In order to deploy this Pod we can run the following command:

kubectl apply -f my-first-pod-cpu.yml