// generateTestingImageList generate randomly generated image list and corresponding expectedImageList.
func generateTestingImageList(count int) ([]kubecontainer.Image, []api.ContainerImage) {
// imageList is randomly generated image list
var imageList []kubecontainer.Image
for ; count > 0; count-- {
imageItem := kubecontainer.Image{
ID: string(uuid.NewUUID()),
RepoTags: generateImageTags(),
Size: rand.Int63nRange(minImgSize, maxImgSize+1),
}
imageList = append(imageList, imageItem)
}
// expectedImageList is generated by imageList according to size and maxImagesInNodeStatus
// 1. sort the imageList by size
sort.Sort(sliceutils.ByImageSize(imageList))
// 2. convert sorted imageList to api.ContainerImage list
var expectedImageList []api.ContainerImage
for _, kubeImage := range imageList {
apiImage := api.ContainerImage{
Names: kubeImage.RepoTags[0:maxNamesPerImageInNodeStatus],
SizeBytes: kubeImage.Size,
}
expectedImageList = append(expectedImageList, apiImage)
}
// 3. only returns the top maxImagesInNodeStatus images in expectedImageList
return imageList, expectedImageList[0:maxImagesInNodeStatus]
}
// Set images list for the node
func (kl *Kubelet) setNodeStatusImages(node *v1.Node) {
// Update image list of this node
var imagesOnNode []v1.ContainerImage
containerImages, err := kl.imageManager.GetImageList()
if err != nil {
glog.Errorf("Error getting image list: %v", err)
} else {
// sort the images from max to min, and only set top N images into the node status.
sort.Sort(sliceutils.ByImageSize(containerImages))
if maxImagesInNodeStatus < len(containerImages) {
containerImages = containerImages[0:maxImagesInNodeStatus]
}
for _, image := range containerImages {
names := append(image.RepoDigests, image.RepoTags...)
// Report up to maxNamesPerImageInNodeStatus names per image.
if len(names) > maxNamesPerImageInNodeStatus {
names = names[0:maxNamesPerImageInNodeStatus]
}
imagesOnNode = append(imagesOnNode, v1.ContainerImage{
Names: names,
SizeBytes: image.Size,
})
}
}
node.Status.Images = imagesOnNode
}