apiVersion: v1
kind: Pod
metadata:
  name: ml-worker
spec:
  restartPolicy: Never # The pod itself should not restart unless explicitly told to.
  initContainers:
  - name: setup-environment
    image: registry.k8s.io/busybox:1.27.2
    command: ['sh', '-c', 'echo "Setting up environment"']
    # This init container runs once to prepare the environment.
    # It will run again after a RestartAllContainers action.
  - name: watcher-sidecar
    image: registry.k8s.io/busybox:1.27.2
    # In a real-world scenario, this would be a dedicated watcher image.
    # This command simulates the watcher exiting with a special code.
    command: ['sh', '-c', 'sleep 60; exit 88']
    restartPolicy: Always
    restartPolicyRules:
    - action: RestartAllContainers
      exitCodes:
        # Exit code 88 triggers a full pod restart.
        operator: In
        values: [88]
  containers:
  - name: main-application
    image: registry.k8s.io/busybox:1.27.2
    command: ['sh', '-c', 'echo "Application is running"; sleep 3600']