func addImagesToGraph(g graph.Graph, images *imageapi.ImageList) {
for i := range images.Items {
image := &images.Items[i]
glog.V(4).Infof("Adding image %q to graph", image.Name)
imageNode := imagegraph.EnsureImageNode(g, image)
topLayerAdded := false
// We're looking through layers in reversed order since we need to
// find first layer (from top) which is not an empty layer, we're omitting
// empty layers because every image has those and they're giving us
// false positives about parents. This applies only to schema v1 images
// schema v2 does not have that problem.
for i := len(image.DockerImageLayers) - 1; i >= 0; i-- {
layer := image.DockerImageLayers[i]
layerNode := imagegraph.EnsureImageComponentLayerNode(g, layer.Name)
edgeKind := ImageLayerEdgeKind
if !topLayerAdded && layer.Name != digest.DigestSha256EmptyTar && layer.Name != digestSHA256GzippedEmptyTar {
edgeKind = ImageTopLayerEdgeKind
topLayerAdded = true
}
g.AddEdge(imageNode, layerNode, edgeKind)
glog.V(4).Infof("Adding image layer %q to graph (%q)", layer.Name, edgeKind)
}
}
}
// addImagesToGraph adds all images to the graph that belong to one of the
// registries in the algorithm and are at least as old as the minimum age
// threshold as specified by the algorithm. It also adds all the images' layers
// to the graph.
func addImagesToGraph(g graph.Graph, images *imageapi.ImageList, algorithm pruneAlgorithm) {
for i := range images.Items {
image := &images.Items[i]
glog.V(4).Infof("Examining image %q", image.Name)
if image.Annotations == nil {
glog.V(4).Infof("Image %q with DockerImageReference %q belongs to an external registry - skipping", image.Name, image.DockerImageReference)
continue
}
if value, ok := image.Annotations[imageapi.ManagedByOpenShiftAnnotation]; !ok || value != "true" {
glog.V(4).Infof("Image %q with DockerImageReference %q belongs to an external registry - skipping", image.Name, image.DockerImageReference)
continue
}
age := unversioned.Now().Sub(image.CreationTimestamp.Time)
if !algorithm.pruneOverSizeLimit && age < algorithm.keepYoungerThan {
glog.V(4).Infof("Image %q is younger than minimum pruning age, skipping (age=%v)", image.Name, age)
continue
}
glog.V(4).Infof("Adding image %q to graph", image.Name)
imageNode := imagegraph.EnsureImageNode(g, image)
if len(image.DockerImageConfig) > 0 {
configName := image.DockerImageMetadata.ID
glog.V(4).Infof("Adding image config %q to graph", configName)
configNode := imagegraph.EnsureImageComponentConfigNode(g, configName)
g.AddEdge(imageNode, configNode, ReferencedImageConfigEdgeKind)
}
for _, layer := range image.DockerImageLayers {
glog.V(4).Infof("Adding image layer %q to graph", layer.Name)
layerNode := imagegraph.EnsureImageComponentLayerNode(g, layer.Name)
g.AddEdge(imageNode, layerNode, ReferencedImageLayerEdgeKind)
}
}
}