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libkpod: remove non-OCI information from inspect

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Remove the non-OCI version of the configuration structure, and the
parent image ID, from the ImageData that libkpod returns.

At runtime, cri-o is only ever going to use the OCI configuration
(possibly converted from another format by the image library) when
setting up a container, so it can be confusing to display settings in
"kpod inspect" that might be discarded when we try to run a container.

Remove the non-OCI version of the configuration structure, and the
hard-coded Type field, from the ContainerData that libkpod returns.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
This commit is contained in:
Nalin Dahyabhai 2017-07-27 12:49:44 -04:00
parent 40117e8bfe
commit 5e97d2a1e2
3 changed files with 170 additions and 82 deletions
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89
libkpod/containerData.go
View file

@ -2,13 +2,13 @@ package libkpod
import (
"encoding/json"
"os"
"time"
"k8s.io/apimachinery/pkg/fields"
pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
"github.com/containers/storage"
"github.com/kubernetes-incubator/cri-o/cmd/kpod/docker"
"github.com/kubernetes-incubator/cri-o/libkpod/common"
"github.com/kubernetes-incubator/cri-o/libkpod/driver"
libkpodimage "github.com/kubernetes-incubator/cri-o/libkpod/image"
@ -30,17 +30,15 @@ type ContainerData struct {
Metadata *pb.ContainerMetadata
BundlePath string
StopSignal string
Type string `json:"type"`
FromImage string `json:"image,omitempty"`
FromImageID string `json:"image-id"`
MountPoint string `json:"mountpoint,omitempty"`
FromImage string `json:"Image,omitempty"`
FromImageID string `json:"ImageID"`
MountPoint string `json:"Mountpoint,omitempty"`
MountLabel string
Mounts []specs.Mount
AppArmorProfile string
ImageAnnotations map[string]string `json:"annotations,omitempty"`
ImageCreatedBy string `json:"created-by,omitempty"`
OCIv1 v1.Image `json:"ociv1,omitempty"`
Docker docker.V2Image `json:"docker,omitempty"`
ImageAnnotations map[string]string `json:"Annotations,omitempty"`
ImageCreatedBy string `json:"CreatedBy,omitempty"`
Config v1.ImageConfig `json:"Config,omitempty"`
SizeRw uint `json:"SizeRw,omitempty"`
SizeRootFs uint `json:"SizeRootFs,omitempty"`
Args []string
@ -62,19 +60,31 @@ func GetContainerData(store storage.Store, name string, size bool) (*ContainerDa
if err != nil {
return nil, errors.Wrapf(err, "error reading build container %q", name)
}
cid, err := libkpodimage.GetContainerCopyData(store, name)
container, err := store.Container(name)
if err != nil {
return nil, errors.Wrapf(err, "error reading container image data")
}
config, err := store.FromContainerDirectory(ctr.ID(), "config.json")
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error reading container data")
}
var m specs.Spec
// The runtime configuration won't exist if the container has never been started by cri-o or kpod,
// so treat a not-exist error as non-fatal.
m := getBlankSpec()
config, err := store.FromContainerDirectory(ctr.ID(), "config.json")
if err != nil && !os.IsNotExist(errors.Cause(err)) {
return nil, err
}
if len(config) > 0 {
if err = json.Unmarshal(config, &m); err != nil {
return nil, err
}
}
if container.ImageID == "" {
return nil, errors.Errorf("error reading container image data: container is not based on an image")
}
imageData, err := libkpodimage.GetImageData(store, container.ImageID)
if err != nil {
return nil, errors.Wrapf(err, "error reading container image data")
}
driverName, err := driver.GetDriverName(store)
if err != nil {
@ -84,10 +94,20 @@ func GetContainerData(store storage.Store, name string, size bool) (*ContainerDa
if err != nil {
return nil, err
}
layer, err := store.Layer(topLayer)
if err != nil {
return nil, err
}
driverMetadata, err := driver.GetDriverMetadata(store, topLayer)
if err != nil {
return nil, err
}
imageName := ""
if len(imageData.Tags) > 0 {
imageName = imageData.Tags[0]
} else if len(imageData.Digests) > 0 {
imageName = imageData.Digests[0]
}
data := &ContainerData{
ID: ctr.ID(),
Name: ctr.Name(),
@ -99,14 +119,12 @@ func GetContainerData(store storage.Store, name string, size bool) (*ContainerDa
BundlePath: ctr.BundlePath(),
StopSignal: ctr.GetStopSignal(),
Args: m.Process.Args,
Type: cid.Type,
FromImage: cid.FromImage,
FromImageID: cid.FromImageID,
MountPoint: cid.MountPoint,
ImageAnnotations: cid.ImageAnnotations,
ImageCreatedBy: cid.ImageCreatedBy,
OCIv1: cid.OCIv1,
Docker: cid.Docker,
FromImage: imageName,
FromImageID: container.ImageID,
MountPoint: layer.MountPoint,
ImageAnnotations: imageData.Annotations,
ImageCreatedBy: imageData.CreatedBy,
Config: imageData.Config,
GraphDriver: driverData{
Name: driverName,
Data: driverMetadata,
@ -155,21 +173,38 @@ func inspectContainer(store storage.Store, container string) (*oci.Container, er
return ociCtr, nil
}
func getBlankSpec() specs.Spec {
return specs.Spec{
Process: &specs.Process{},
Root: &specs.Root{},
Mounts: []specs.Mount{},
Hooks: &specs.Hooks{},
Annotations: make(map[string]string),
Linux: &specs.Linux{},
Solaris: &specs.Solaris{},
Windows: &specs.Windows{},
}
}
// get an oci.Container instance for a given container ID
func getOCIContainer(store storage.Store, container string) (*oci.Container, error) {
ctr, err := FindContainer(store, container)
if err != nil {
return nil, err
}
// The runtime configuration won't exist if the container has never been started by cri-o or kpod,
// so treat a not-exist error as non-fatal.
m := getBlankSpec()
config, err := store.FromContainerDirectory(ctr.ID, "config.json")
if err != nil {
if err != nil && !os.IsNotExist(errors.Cause(err)) {
return nil, err
}
var m specs.Spec
if len(config) > 0 {
if err = json.Unmarshal(config, &m); err != nil {
return nil, err
}
}
labels := make(map[string]string)
err = json.Unmarshal([]byte(m.Annotations[annotations.Labels]), &labels)

37
libkpod/image/image.go
View file

@ -6,6 +6,7 @@ import (
"time"
is "github.com/containers/image/storage"
"github.com/containers/image/transports"
"github.com/containers/image/types"
"github.com/containers/storage"
"github.com/kubernetes-incubator/cri-o/libkpod/common"
@ -174,7 +175,7 @@ func FormattedSize(size int64) string {
return fmt.Sprintf("%.4g %s", formattedSize, suffixes[count])
}
// FindImage searches for an image with a matching the given name or ID in the given store
// FindImage searches for a *storage.Image with a matching the given name or ID in the given store.
func FindImage(store storage.Store, image string) (*storage.Image, error) {
var img *storage.Image
ref, err := is.Transport.ParseStoreReference(store, image)
@ -194,6 +195,23 @@ func FindImage(store storage.Store, image string) (*storage.Image, error) {
return img, nil
}
// FindImageRef searches for and returns a new types.Image matching the given name or ID in the given store.
func FindImageRef(store storage.Store, image string) (types.Image, error) {
img, err := FindImage(store, image)
if err != nil {
return nil, errors.Wrapf(err, "unable to locate image %q", image)
}
ref, err := is.Transport.ParseStoreReference(store, "@"+img.ID)
if err != nil {
return nil, errors.Wrapf(err, "error parsing reference to image %q", img.ID)
}
imgRef, err := ref.NewImage(nil)
if err != nil {
return nil, errors.Wrapf(err, "error reading image %q", img.ID)
}
return imgRef, nil
}
func findImageInSlice(images []storage.Image, ref string) (storage.Image, error) {
for _, image := range images {
if MatchesID(image.ID, ref) {
@ -211,23 +229,22 @@ func findImageInSlice(images []storage.Image, ref string) (storage.Image, error)
// InfoAndDigestAndSize returns the inspection info and size of the image in the given
// store and the digest of its manifest, if it has one, or "" if it doesn't.
func InfoAndDigestAndSize(store storage.Store, img storage.Image) (*types.ImageInspectInfo, digest.Digest, int64, error) {
is.Transport.SetStore(store)
storeRef, err := is.Transport.ParseStoreReference(store, "@"+img.ID)
if err != nil {
return nil, "", -1, errors.Wrapf(err, "error parsing image reference %q", "@"+img.ID)
}
imgRef, err := storeRef.NewImage(nil)
imgRef, err := FindImageRef(store, "@"+img.ID)
if err != nil {
return nil, "", -1, errors.Wrapf(err, "error reading image %q", img.ID)
}
defer imgRef.Close()
return infoAndDigestAndSize(imgRef)
}
func infoAndDigestAndSize(imgRef types.Image) (*types.ImageInspectInfo, digest.Digest, int64, error) {
imgSize, err := imgRef.Size()
if err != nil {
return nil, "", -1, errors.Wrapf(err, "error reading size of image %q", img.ID)
return nil, "", -1, errors.Wrapf(err, "error reading size of image %q", transports.ImageName(imgRef.Reference()))
}
manifest, _, err := imgRef.Manifest()
if err != nil {
return nil, "", -1, errors.Wrapf(err, "error reading manifest for image %q", img.ID)
return nil, "", -1, errors.Wrapf(err, "error reading manifest for image %q", transports.ImageName(imgRef.Reference()))
}
manifestDigest := digest.Digest("")
if len(manifest) > 0 {
@ -235,7 +252,7 @@ func InfoAndDigestAndSize(store storage.Store, img storage.Image) (*types.ImageI
}
info, err := imgRef.Inspect()
if err != nil {
return nil, "", -1, errors.Wrapf(err, "error inspecting image %q", img.ID)
return nil, "", -1, errors.Wrapf(err, "error inspecting image %q", transports.ImageName(imgRef.Reference()))
}
return info, manifestDigest, imgSize, nil
}

82
libkpod/image/imageData.go
View file

@ -1,11 +1,12 @@
package image
import (
"encoding/json"
"time"
"github.com/containers/image/docker/reference"
"github.com/containers/image/transports"
"github.com/containers/storage"
"github.com/kubernetes-incubator/cri-o/cmd/kpod/docker"
"github.com/kubernetes-incubator/cri-o/libkpod/driver"
digest "github.com/opencontainers/go-digest"
ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
@ -19,15 +20,15 @@ type ImageData struct {
Tags []string
Digests []string
Digest digest.Digest
Parent string
Comment string
Created *time.Time
Container string
ContainerConfig docker.Config
Author string
Config ociv1.ImageConfig
Architecture string
OS string
Annotations map[string]string
CreatedBy string
Size uint
VirtualSize uint
GraphDriver driver.Data
@ -60,6 +61,20 @@ func ParseImageNames(names []string) (tags, digests []string, err error) {
return tags, digests, nil
}
func annotations(manifest []byte, manifestType string) map[string]string {
annotations := make(map[string]string)
switch manifestType {
case ociv1.MediaTypeImageManifest:
var m ociv1.Manifest
if err := json.Unmarshal(manifest, &m); err == nil {
for k, v := range m.Annotations {
annotations[k] = v
}
}
}
return annotations
}
// GetImageData gets the ImageData for a container with the given name in the given store.
func GetImageData(store storage.Store, name string) (*ImageData, error) {
img, err := FindImage(store, name)
@ -67,10 +82,11 @@ func GetImageData(store storage.Store, name string) (*ImageData, error) {
return nil, errors.Wrapf(err, "error reading image %q", name)
}
cid, err := GetImageCopyData(store, name)
imgRef, err := FindImageRef(store, "@"+img.ID)
if err != nil {
return nil, errors.Wrapf(err, "error reading image %q", name)
return nil, errors.Wrapf(err, "error reading image %q", img.ID)
}
defer imgRef.Close()
tags, digests, err := ParseImageNames(img.Names)
if err != nil {
@ -79,50 +95,70 @@ func GetImageData(store storage.Store, name string) (*ImageData, error) {
driverName, err := driver.GetDriverName(store)
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error reading name of storage driver")
}
topLayerID := img.TopLayer
driverMetadata, err := driver.GetDriverMetadata(store, topLayerID)
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error asking storage driver %q for metadata", driverName)
}
layer, err := store.Layer(topLayerID)
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error reading information about layer %q", topLayerID)
}
size, err := store.DiffSize(layer.Parent, layer.ID)
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error determining size of layer %q", layer.ID)
}
_, digest, virtualSize, err := InfoAndDigestAndSize(store, *img)
imgSize, err := imgRef.Size()
if err != nil {
return nil, err
return nil, errors.Wrapf(err, "error determining size of image %q", transports.ImageName(imgRef.Reference()))
}
manifest, manifestType, err := imgRef.Manifest()
if err != nil {
return nil, errors.Wrapf(err, "error reading manifest for image %q", img.ID)
}
manifestDigest := digest.Digest("")
if len(manifest) > 0 {
manifestDigest = digest.Canonical.FromBytes(manifest)
}
annotations := annotations(manifest, manifestType)
config, err := imgRef.OCIConfig()
if err != nil {
return nil, errors.Wrapf(err, "error reading image configuration for %q", img.ID)
}
historyComment := ""
historyCreatedBy := ""
if len(config.History) > 0 {
historyComment = config.History[len(config.History)-1].Comment
historyCreatedBy = config.History[len(config.History)-1].CreatedBy
}
return &ImageData{
ID: img.ID,
Tags: tags,
Digests: digests,
Digest: digest,
Parent: string(cid.Docker.Parent),
Comment: cid.OCIv1.History[0].Comment,
Created: cid.OCIv1.Created,
Container: cid.Docker.Container,
ContainerConfig: cid.Docker.ContainerConfig,
Author: cid.OCIv1.Author,
Config: cid.OCIv1.Config,
Architecture: cid.OCIv1.Architecture,
OS: cid.OCIv1.OS,
Digest: manifestDigest,
Comment: historyComment,
Created: config.Created,
Author: config.Author,
Config: config.Config,
Architecture: config.Architecture,
OS: config.OS,
Annotations: annotations,
CreatedBy: historyCreatedBy,
Size: uint(size),
VirtualSize: uint(virtualSize),
VirtualSize: uint(size + imgSize),
GraphDriver: driver.Data{
Name: driverName,
Data: driverMetadata,
},
RootFS: cid.OCIv1.RootFS,
RootFS: config.RootFS,
}, nil
}