StabilityLevel: metrics.ALPHA,
		},
		[]string{"container_type", "code"},
	)
	// ManagedEphemeralContainers is a gauge that indicates how many ephemeral containers are managed by this kubelet.
	ManagedEphemeralContainers = metrics.NewGauge(
		&metrics.GaugeOpts{
			Subsystem:      KubeletSubsystem,
			Name:           ManagedEphemeralContainersKey,

	var numEC int
	if oldPod != nil {
		numEC -= len(oldPod.Spec.EphemeralContainers)
	}
	if newPod != nil {
		numEC += len(newPod.Spec.EphemeralContainers)
	}
	if numEC != 0 {
		metrics.ManagedEphemeralContainers.Add(float64(numEC))
	}
}

// updatePodsInternal replaces the given pods in the current state of the
// manager, updating the various indices. The caller is assumed to hold the
// lock.