pod-cpu-stress

Runs CPU stress workers inside the pod's cgroup namespace, consuming CPU cycles for the experiment duration.

Target kind: Pod
Implementation: Daemon (ExecStressChaos with stressorType: cpu)
Rollback: Yes — sends CancelChaos to terminate stress-ng

Parameters

Name	Type	Required	Default	Description
workers	string	No	"1"	Number of CPU stress worker threads
load	string	No	"100"	Target CPU load percentage (0-100)
duration	string	No	experiment duration	How long to run stress (e.g. 60s, 5m)

Example

apiVersion: chaos.chaosplane.io/v1alpha1
kind: ChaosExperiment
metadata:
  name: pod-cpu-stress-example
  namespace: default
spec:
  target:
    kind: Pod
    namespace: default
    labelSelector:
      matchLabels:
        app: api-server
  action:
    type: pod-cpu-stress
    parameters:
      workers: "2"
      load: "80"
      duration: "60s"
  duration: 60s
  rollback:
    enabled: true
    timeout: 30s

Rollback behavior

The operator stores the execution ID returned by the daemon. On rollback, it sends a CancelChaos RPC with that execution ID. The daemon terminates the stress-ng process.

Implementation notes

The daemon runs stress-ng inside the pod's cgroup namespace so CPU consumption is attributed to the pod and subject to its resource limits. The workers parameter maps to stress-ng --cpu N and load maps to --cpu-load N.

The operator tracks execution IDs per experiment UID to support concurrent experiments on the same node.