RuntimeClass

Definition

RuntimeClass in Kubernetes is a feature that allows cluster administrators to define and manage different runtime configurations for pods. It provides a mechanism to specify which container runtime should be used for a particular workload, enabling the use of specialized runtimes for enhanced security, performance, or compliance requirements. By using RuntimeClass, administrators can optimize resource usage and enforce security policies tailored to specific application needs.

Secure Settings Example

apiVersion: node.k8s.io/v1
kind: RuntimeClass
metadata:
  name: gvisor
handler: gvisor

In this example, the RuntimeClass is configured to use gvisor, a secure container runtime that provides additional isolation by running containers in a user-space kernel.

Insecure Settings Example

apiVersion: node.k8s.io/v1
kind: RuntimeClass
metadata:
  name: default
handler: docker

This example uses the default docker runtime without specifying any additional security configurations, potentially exposing the system to vulnerabilities inherent in the default runtime environment.