Exemple #1
0
// PushImageJSONRegistry pushes JSON metadata for a local image to the registry
func (r *Session) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string) error {

	u := registry + "images/" + imgData.ID + "/json"

	logrus.Debugf("[registry] Calling PUT %s", u)

	req, err := http.NewRequest("PUT", u, bytes.NewReader(jsonRaw))
	if err != nil {
		return err
	}
	req.Header.Add("Content-type", "application/json")

	res, err := r.client.Do(req)
	if err != nil {
		return fmt.Errorf("Failed to upload metadata: %s", err)
	}
	defer res.Body.Close()
	if res.StatusCode == 401 && strings.HasPrefix(registry, "http://") {
		return httputils.NewHTTPRequestError("HTTP code 401, Docker will not send auth headers over HTTP.", res)
	}
	if res.StatusCode != 200 {
		errBody, err := ioutil.ReadAll(res.Body)
		if err != nil {
			return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res)
		}
		var jsonBody map[string]string
		if err := json.Unmarshal(errBody, &jsonBody); err != nil {
			errBody = []byte(err.Error())
		} else if jsonBody["error"] == "Image already exists" {
			return ErrAlreadyExists
		}
		return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata: %q", res.StatusCode, errBody), res)
	}
	return nil
}
Exemple #2
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// PushImageLayerRegistry sends the checksum of an image layer to the registry
func (r *Session) PushImageLayerRegistry(imgID string, layer io.Reader, registry string, jsonRaw []byte) (checksum string, checksumPayload string, err error) {
	u := registry + "images/" + imgID + "/layer"

	logrus.Debugf("[registry] Calling PUT %s", u)

	tarsumLayer, err := tarsum.NewTarSum(layer, false, tarsum.Version0)
	if err != nil {
		return "", "", err
	}
	h := sha256.New()
	h.Write(jsonRaw)
	h.Write([]byte{'\n'})
	checksumLayer := io.TeeReader(tarsumLayer, h)

	req, err := http.NewRequest("PUT", u, checksumLayer)
	if err != nil {
		return "", "", err
	}
	req.Header.Add("Content-Type", "application/octet-stream")
	req.ContentLength = -1
	req.TransferEncoding = []string{"chunked"}
	res, err := r.client.Do(req)
	if err != nil {
		return "", "", fmt.Errorf("Failed to upload layer: %v", err)
	}
	if rc, ok := layer.(io.Closer); ok {
		if err := rc.Close(); err != nil {
			return "", "", err
		}
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		errBody, err := ioutil.ReadAll(res.Body)
		if err != nil {
			return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res)
		}
		return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("Received HTTP code %d while uploading layer: %q", res.StatusCode, errBody), res)
	}

	checksumPayload = "sha256:" + hex.EncodeToString(h.Sum(nil))
	return tarsumLayer.Sum(jsonRaw), checksumPayload, nil
}
Exemple #3
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// LookupRemoteImage checks if an image exists in the registry
func (r *Session) LookupRemoteImage(imgID, registry string) error {
	res, err := r.client.Get(registry + "images/" + imgID + "/json")
	if err != nil {
		return err
	}
	res.Body.Close()
	if res.StatusCode != 200 {
		return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res)
	}
	return nil
}
Exemple #4
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// SearchRepositories performs a search against the remote repository
func (r *Session) SearchRepositories(term string) (*SearchResults, error) {
	logrus.Debugf("Index server: %s", r.indexEndpoint)
	u := r.indexEndpoint.VersionString(1) + "search?q=" + url.QueryEscape(term)

	req, err := http.NewRequest("GET", u, nil)
	if err != nil {
		return nil, fmt.Errorf("Error while getting from the server: %v", err)
	}
	// Have the AuthTransport send authentication, when logged in.
	req.Header.Set("X-Docker-Token", "true")
	res, err := r.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	if res.StatusCode != 200 {
		return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Unexpected status code %d", res.StatusCode), res)
	}
	result := new(SearchResults)
	return result, json.NewDecoder(res.Body).Decode(result)
}
Exemple #5
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// PushRegistryTag pushes a tag on the registry.
// Remote has the format '<user>/<repo>
func (r *Session) PushRegistryTag(remote, revision, tag, registry string) error {
	// "jsonify" the string
	revision = "\"" + revision + "\""
	path := fmt.Sprintf("repositories/%s/tags/%s", remote, tag)

	req, err := http.NewRequest("PUT", registry+path, strings.NewReader(revision))
	if err != nil {
		return err
	}
	req.Header.Add("Content-type", "application/json")
	req.ContentLength = int64(len(revision))
	res, err := r.client.Do(req)
	if err != nil {
		return err
	}
	res.Body.Close()
	if res.StatusCode != 200 && res.StatusCode != 201 {
		return httputils.NewHTTPRequestError(fmt.Sprintf("Internal server error: %d trying to push tag %s on %s", res.StatusCode, tag, remote), res)
	}
	return nil
}
Exemple #6
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// GetRemoteHistory retrieves the history of a given image from the registry.
// It returns a list of the parent's JSON files (including the requested image).
func (r *Session) GetRemoteHistory(imgID, registry string) ([]string, error) {
	res, err := r.client.Get(registry + "images/" + imgID + "/ancestry")
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	if res.StatusCode != 200 {
		if res.StatusCode == 401 {
			return nil, errLoginRequired
		}
		return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch remote history for %s", res.StatusCode, imgID), res)
	}

	var history []string
	if err := json.NewDecoder(res.Body).Decode(&history); err != nil {
		return nil, fmt.Errorf("Error while reading the http response: %v", err)
	}

	logrus.Debugf("Ancestry: %v", history)
	return history, nil
}
Exemple #7
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// GetRemoteImageJSON retrieves an image's JSON metadata from the registry.
func (r *Session) GetRemoteImageJSON(imgID, registry string) ([]byte, int, error) {
	res, err := r.client.Get(registry + "images/" + imgID + "/json")
	if err != nil {
		return nil, -1, fmt.Errorf("Failed to download json: %s", err)
	}
	defer res.Body.Close()
	if res.StatusCode != 200 {
		return nil, -1, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res)
	}
	// if the size header is not present, then set it to '-1'
	imageSize := -1
	if hdr := res.Header.Get("X-Docker-Size"); hdr != "" {
		imageSize, err = strconv.Atoi(hdr)
		if err != nil {
			return nil, -1, err
		}
	}

	jsonString, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return nil, -1, fmt.Errorf("Failed to parse downloaded json: %v (%s)", err, jsonString)
	}
	return jsonString, imageSize, nil
}
Exemple #8
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// PushImageJSONIndex uploads an image list to the repository
func (r *Session) PushImageJSONIndex(remote string, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error) {
	cleanImgList := []*ImgData{}
	if validate {
		for _, elem := range imgList {
			if elem.Checksum != "" {
				cleanImgList = append(cleanImgList, elem)
			}
		}
	} else {
		cleanImgList = imgList
	}

	imgListJSON, err := json.Marshal(cleanImgList)
	if err != nil {
		return nil, err
	}
	var suffix string
	if validate {
		suffix = "images"
	}
	u := fmt.Sprintf("%srepositories/%s/%s", r.indexEndpoint.VersionString(1), remote, suffix)
	logrus.Debugf("[registry] PUT %s", u)
	logrus.Debugf("Image list pushed to index:\n%s", imgListJSON)
	headers := map[string][]string{
		"Content-type": {"application/json"},
		// this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests
		"X-Docker-Token": {"true"},
	}
	if validate {
		headers["X-Docker-Endpoints"] = regs
	}

	// Redirect if necessary
	var res *http.Response
	for {
		if res, err = r.putImageRequest(u, headers, imgListJSON); err != nil {
			return nil, err
		}
		if !shouldRedirect(res) {
			break
		}
		res.Body.Close()
		u = res.Header.Get("Location")
		logrus.Debugf("Redirected to %s", u)
	}
	defer res.Body.Close()

	if res.StatusCode == 401 {
		return nil, errLoginRequired
	}

	var tokens, endpoints []string
	if !validate {
		if res.StatusCode != 200 && res.StatusCode != 201 {
			errBody, err := ioutil.ReadAll(res.Body)
			if err != nil {
				logrus.Debugf("Error reading response body: %s", err)
			}
			return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push repository %s: %q", res.StatusCode, remote, errBody), res)
		}
		tokens = res.Header["X-Docker-Token"]
		logrus.Debugf("Auth token: %v", tokens)

		if res.Header.Get("X-Docker-Endpoints") == "" {
			return nil, fmt.Errorf("Index response didn't contain any endpoints")
		}
		endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.VersionString(1))
		if err != nil {
			return nil, err
		}
	} else {
		if res.StatusCode != 204 {
			errBody, err := ioutil.ReadAll(res.Body)
			if err != nil {
				logrus.Debugf("Error reading response body: %s", err)
			}
			return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push checksums %s: %q", res.StatusCode, remote, errBody), res)
		}
	}

	return &RepositoryData{
		Endpoints: endpoints,
	}, nil
}
Exemple #9
0
// GetRepositoryData returns lists of images and endpoints for the repository
func (r *Session) GetRepositoryData(remote string) (*RepositoryData, error) {
	repositoryTarget := fmt.Sprintf("%srepositories/%s/images", r.indexEndpoint.VersionString(1), remote)

	logrus.Debugf("[registry] Calling GET %s", repositoryTarget)

	req, err := http.NewRequest("GET", repositoryTarget, nil)
	if err != nil {
		return nil, err
	}
	// this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests
	req.Header.Set("X-Docker-Token", "true")
	res, err := r.client.Do(req)
	if err != nil {
		// check if the error is because of i/o timeout
		// and return a non-obtuse error message for users
		// "Get https://index.docker.io/v1/repositories/library/busybox/images: i/o timeout"
		// was a top search on the docker user forum
		if strings.HasSuffix(err.Error(), "i/o timeout") {
			return nil, fmt.Errorf("Network timed out while trying to connect to %s. You may want to check your internet connection or if you are behind a proxy.", repositoryTarget)
		}
		return nil, fmt.Errorf("Error while pulling image: %v", err)
	}
	defer res.Body.Close()
	if res.StatusCode == 401 {
		return nil, errLoginRequired
	}
	// TODO: Right now we're ignoring checksums in the response body.
	// In the future, we need to use them to check image validity.
	if res.StatusCode == 404 {
		return nil, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code: %d", res.StatusCode), res)
	} else if res.StatusCode != 200 {
		errBody, err := ioutil.ReadAll(res.Body)
		if err != nil {
			logrus.Debugf("Error reading response body: %s", err)
		}
		return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to pull repository %s: %q", res.StatusCode, remote, errBody), res)
	}

	var endpoints []string
	if res.Header.Get("X-Docker-Endpoints") != "" {
		endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.VersionString(1))
		if err != nil {
			return nil, err
		}
	} else {
		// Assume the endpoint is on the same host
		endpoints = append(endpoints, fmt.Sprintf("%s://%s/v1/", r.indexEndpoint.URL.Scheme, req.URL.Host))
	}

	remoteChecksums := []*ImgData{}
	if err := json.NewDecoder(res.Body).Decode(&remoteChecksums); err != nil {
		return nil, err
	}

	// Forge a better object from the retrieved data
	imgsData := make(map[string]*ImgData, len(remoteChecksums))
	for _, elem := range remoteChecksums {
		imgsData[elem.ID] = elem
	}

	return &RepositoryData{
		ImgList:   imgsData,
		Endpoints: endpoints,
	}, nil
}