// SquashLayers receives a list of ACI layer file names ordered from base image
// to application image and squashes them into one ACI
func SquashLayers(images []acirenderer.Image, aciRegistry acirenderer.ACIRegistry, parsedDockerURL types.ParsedDockerURL, outputDir string) (string, error) {
util.Debug("Squashing layers...")
util.Debug("Rendering ACI...")
renderedACI, err := acirenderer.GetRenderedACIFromList(images, aciRegistry)
if err != nil {
return "", fmt.Errorf("error rendering squashed image: %v", err)
}
manifests, err := getManifests(renderedACI, aciRegistry)
if err != nil {
return "", fmt.Errorf("error getting manifests: %v", err)
}
squashedFilename := getSquashedFilename(parsedDockerURL)
squashedImagePath := path.Join(outputDir, squashedFilename)
squashedImageFile, err := os.Create(squashedImagePath)
if err != nil {
return "", err
}
defer squashedImageFile.Close()
util.Debug("Writing squashed ACI...")
if err := writeSquashedImage(squashedImageFile, renderedACI, aciRegistry, manifests); err != nil {
return "", fmt.Errorf("error writing squashed image: %v", err)
}
util.Debug("Validating squashed ACI...")
if err := common.ValidateACI(squashedImagePath); err != nil {
return "", fmt.Errorf("error validating image: %v", err)
}
util.Debug("ACI squashed!")
return squashedImagePath, nil
}
func (rb *RepositoryBackend) buildACIV1(layerNumber int, layerID string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, curPwl []string, compress bool) (string, *schema.ImageManifest, error) {
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
j, size, err := rb.getJsonV1(layerID, rb.repoData.Endpoints[0], rb.repoData)
if err != nil {
return "", nil, fmt.Errorf("error getting image json: %v", err)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal(j, &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
layerFile, err := rb.getLayerV1(layerID, rb.repoData.Endpoints[0], rb.repoData, size, tmpDir)
if err != nil {
return "", nil, fmt.Errorf("error getting the remote layer: %v", err)
}
defer layerFile.Close()
util.Debug("Generating layer ACI...")
aciPath, manifest, err := common.GenerateACI(layerNumber, layerData, dockerURL, outputDir, layerFile, curPwl, compress)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, manifest, nil
}
func (lb *FileBackend) BuildACI(layerID string, dockerURL *types.ParsedDockerURL, outputDir string, curPwl []string, compress bool) (string, *schema.ImageManifest, error) {
tmpDir, err := ioutil.TempDir("", "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
j, err := getJson(lb.file, layerID)
if err != nil {
return "", nil, fmt.Errorf("error getting image json: %v", err)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal(j, &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
tmpLayerPath := path.Join(tmpDir, layerID)
tmpLayerPath += ".tar"
layerFile, err := extractEmbeddedLayer(lb.file, layerID, tmpLayerPath)
if err != nil {
return "", nil, fmt.Errorf("error getting layer from file: %v", err)
}
defer layerFile.Close()
util.Debug("Generating layer ACI...")
aciPath, manifest, err := common.GenerateACI(layerData, dockerURL, outputDir, layerFile, curPwl, compress)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, manifest, nil
}
func convertPorts(dockerExposedPorts map[string]struct{}, dockerPortSpecs []string) ([]appctypes.Port, error) {
ports := []appctypes.Port{}
for ep := range dockerExposedPorts {
appcPort, err := parseDockerPort(ep)
if err != nil {
return nil, err
}
ports = append(ports, *appcPort)
}
if dockerExposedPorts == nil && dockerPortSpecs != nil {
util.Debug("warning: docker image uses deprecated PortSpecs field")
for _, ep := range dockerPortSpecs {
appcPort, err := parseDockerPort(ep)
if err != nil {
return nil, err
}
ports = append(ports, *appcPort)
}
}
sort.Sort(appcPortSorter(ports))
return ports, nil
}
// SquashLayers receives a list of ACI layer file names ordered from base image
// to application image and squashes them into one ACI
func SquashLayers(images []acirenderer.Image, aciRegistry acirenderer.ACIRegistry, parsedDockerURL types.ParsedDockerURL, outputDir string) (path string, err error) {
util.Debug("Squashing layers...")
util.Debug("Rendering ACI...")
renderedACI, err := acirenderer.GetRenderedACIFromList(images, aciRegistry)
if err != nil {
return "", fmt.Errorf("error rendering squashed image: %v", err)
}
manifests, err := getManifests(renderedACI, aciRegistry)
if err != nil {
return "", fmt.Errorf("error getting manifests: %v", err)
}
squashedFilename := getSquashedFilename(parsedDockerURL)
squashedImagePath := filepath.Join(outputDir, squashedFilename)
squashedTempFile, err := ioutil.TempFile(outputDir, "docker2aci-squashedFile-")
if err != nil {
return "", err
}
defer func() {
if err == nil {
err = squashedTempFile.Close()
} else {
// remove temp file on error
// we ignore its error to not mask the real error
os.Remove(squashedTempFile.Name())
}
}()
util.Debug("Writing squashed ACI...")
if err := writeSquashedImage(squashedTempFile, renderedACI, aciRegistry, manifests); err != nil {
return "", fmt.Errorf("error writing squashed image: %v", err)
}
util.Debug("Validating squashed ACI...")
if err := common.ValidateACI(squashedTempFile.Name()); err != nil {
return "", fmt.Errorf("error validating image: %v", err)
}
if err := os.Rename(squashedTempFile.Name(), squashedImagePath); err != nil {
return "", err
}
util.Debug("ACI squashed!")
return squashedImagePath, nil
}
func convertReal(backend Docker2ACIBackend, dockerURL string, squash bool, outputDir string, tmpDir string) ([]string, error) {
util.Debug("Getting image info...")
ancestry, parsedDockerURL, err := backend.GetImageInfo(dockerURL)
if err != nil {
return nil, err
}
layersOutputDir := outputDir
if squash {
layersOutputDir, err = ioutil.TempDir(tmpDir, "docker2aci-")
if err != nil {
return nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(layersOutputDir)
}
conversionStore := NewConversionStore()
var images acirenderer.Images
var aciLayerPaths []string
var curPwl []string
for i := len(ancestry) - 1; i >= 0; i-- {
layerID := ancestry[i]
// only compress individual layers if we're not squashing
aciPath, manifest, err := backend.BuildACI(i, layerID, parsedDockerURL, layersOutputDir, tmpDir, curPwl, !squash)
if err != nil {
return nil, fmt.Errorf("error building layer: %v", err)
}
key, err := conversionStore.WriteACI(aciPath)
if err != nil {
return nil, fmt.Errorf("error inserting in the conversion store: %v", err)
}
images = append(images, acirenderer.Image{Im: manifest, Key: key, Level: uint16(i)})
aciLayerPaths = append(aciLayerPaths, aciPath)
curPwl = manifest.PathWhitelist
}
// acirenderer expects images in order from upper to base layer
images = util.ReverseImages(images)
if squash {
squashedImagePath, err := SquashLayers(images, conversionStore, *parsedDockerURL, outputDir)
if err != nil {
return nil, fmt.Errorf("error squashing image: %v", err)
}
aciLayerPaths = []string{squashedImagePath}
}
return aciLayerPaths, nil
}
func (rb *RepositoryBackend) buildACIV2(layerNumber int, layerID string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, curPwl []string, compress bool) (string, *schema.ImageManifest, error) {
manifest := rb.imageManifests[*dockerURL]
layerIndex, err := getLayerIndex(layerID, manifest)
if err != nil {
return "", nil, err
}
if len(manifest.History) <= layerIndex {
return "", nil, fmt.Errorf("history not found for layer %s", layerID)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal([]byte(manifest.History[layerIndex].V1Compatibility), &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
layerFile, err := rb.getLayerV2(layerID, dockerURL, tmpDir)
if err != nil {
return "", nil, fmt.Errorf("error getting the remote layer: %v", err)
}
defer layerFile.Close()
util.Debug("Generating layer ACI...")
aciPath, aciManifest, err := common.GenerateACI(layerNumber, layerData, dockerURL, outputDir, layerFile, curPwl, compress)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, aciManifest, nil
}