Scheduled Stress all nodes in K8s

Dockerfile

FROM alpine

RUN apk add stress-ng

ENTRYPOINT ["stress-ng"]

stress.cronjob.yaml

apiVersion: batch/v1
kind: CronJob
metadata:
  name: stress
  labels:
    app: stress
spec:
  concurrencyPolicy: Replace
  successfulJobsHistoryLimit: 1
  failedJobsHistoryLimit: 1
  schedule: "* * * * *" # Run every minute
  jobTemplate:
    spec:
      parallelism: 4 # Number of nodes
      template:
        metadata:
          labels:
            app: stress
        spec:
          affinity:
            podAntiAffinity:
              preferredDuringSchedulingIgnoredDuringExecution:
                - podAffinityTerm:
                    topologyKey: kubernetes.io/hostname
                    labelSelector:
                      matchExpressions:
                      - key: app
                        operator: In
                        values:
                        - stress
                  weight: 100
          containers:
          - name: stress
            image: adyanth/stress-ng
            imagePullPolicy: IfNotPresent
            args:
            - --cpu
            - "1" # 1 core stress
            - --timeout
            - 10s # 10 sec timeout
          restartPolicy: Never