// this can happen if the pod was dynamically added to the mesh after it was created.
	// in that case, try finding the netns using procfs.
	if err := s.rescanPod(pod); err != nil {
		log.Errorf("error scanning proc: error was %s", err)
		return nil, err
	}
	// try again. we can still get here if the pod is in the process of being created.
	// in this case the CNI will be invoked soon and provide us with the netns.

	}
}

type PodNetnsFinder interface {
	FindNetnsForPods(filter map[types.UID]*corev1.Pod) (PodToNetns, error)
}

type PodNetnsProcFinder struct {
	proc fs.FS
}

func NewPodNetnsProcFinder(proc fs.FS) *PodNetnsProcFinder {
	return &PodNetnsProcFinder{proc: proc}
}

func isNotNumber(r rune) bool {
	return r < '0' || r > '9'
}