Resource isolation via cgroups/CPU/mem limits

Jan 1, 0001

Definition

Resource isolation via cgroups (control groups) and CPU/memory limits is a technique used to allocate and restrict the amount of system resources that processes or containers can use. This ensures that no single process or container can monopolize system resources, which is crucial for maintaining system stability and performance, especially in multi-tenant environments. By setting limits on CPU and memory usage, administrators can prevent resource exhaustion and ensure fair resource distribution among applications.

Secure Settings Example

# Kubernetes Pod configuration with resource limits
apiVersion: v1
kind: Pod
metadata:
  name: secure-pod
spec:
  containers:
  - name: secure-container
    image: nginx
    resources:
      limits:
        memory: "512Mi"
        cpu: "500m"
      requests:
        memory: "256Mi"
        cpu: "250m"

Insecure Settings Example

# Kubernetes Pod configuration without resource limits
apiVersion: v1
kind: Pod
metadata:
  name: insecure-pod
spec:
  containers:
  - name: insecure-container
    image: nginx
    resources:
      # No limits or requests defined