CPU Limits Not Set

Query id: 4ac0e2b7-d2d2-4af7-8799-e8de6721ccda
Query name: CPU Limits Not Set
Platform: Kubernetes
Severity: Medium
Category: Resource Management
URL: Github

Description¶

CPU limits should be set because if the system has CPU time free, a container is guaranteed to be allocated as much CPU as it requests
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Positive test num. 1 - yaml file

apiVersion: v1
kind: Pod
metadata:
  name: frontend
spec:
  containers:
    - name: app
      image: images.my-company.example/app:v4
      resources:
        limits:
          memory: "64Mi"
    - name: log-aggregator
      image: images.my-company.example/log-aggregator:v6
      resources:
        requests:
          memory: "64Mi"
          cpu: "250m"
---
apiVersion: serving.knative.dev/v1
kind: Configuration
metadata:
  name: dummy-config
  namespace: knative-sequence
spec:
  template:
    spec:
      containers:
        - name: app
          image: images.my-company.example/app:v4
          resources:
            limits:
              memory: "64Mi"
        - name: log-aggregator
          image: images.my-company.example/log-aggregator:v6
          resources:
            requests:
              memory: "64Mi"
              cpu: "250m"

Code samples without security vulnerabilities¶

Negative test num. 1 - yaml file

apiVersion: v1
kind: Pod
metadata:
  name: frontend
spec:
  containers:
  - name: app
    image: images.my-company.example/app:v4
    resources:
      limits:
        cpu: "500m"

  - name: log-aggregator
    image: images.my-company.example/log-aggregator:v6
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"