forked from TrueCloudLab/distribution
Adding support for nicer URLs to support standalone registry (+ some registry code cleaning)
This commit is contained in:
Sam Alba
parent
258cbb06c9
commit
ec6d1d6020
1 changed files with 81 additions and 60 deletions
141
docs/registry.go
141
docs/registry.go
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@ -12,18 +12,70 @@ import (
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"net/http"
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"net/http/cookiejar"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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)
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var ErrAlreadyExists = errors.New("Image already exists")
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func UrlScheme() string {
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u, err := url.Parse(auth.IndexServerAddress())
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func pingRegistryEndpoint(endpoint string) error {
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// FIXME: implement the check to discover if it should be http or https
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resp, err := http.Get(endpoint)
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if err != nil {
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return "https"
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return err
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}
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return u.Scheme
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if resp.Header.Get("X-Docker-Registry-Version") == "" {
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return errors.New("This does not look like a Registry server (\"X-Docker-Registry-Version\" header not found in the response)")
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}
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return nil
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}
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func validateRepositoryName(namespace, name string) error {
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validNamespace := regexp.MustCompile(`^([a-z0-9_]{4,30})$`)
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if !validNamespace.MatchString(namespace) {
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return fmt.Errorf("Invalid namespace name (%s), only [a-z0-9_] are allowed, size between 4 and 30", namespace)
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}
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validRepo := regexp.MustCompile(`^([a-zA-Z0-9-_.]+)$`)
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if !validRepo.MatchString(name) {
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return fmt.Errorf("Invalid repository name (%s), only [a-zA-Z0-9-_.] are allowed", name)
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}
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return nil
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}
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// Resolves a repository name to a endpoint + name
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func ResolveRepositoryName(reposName string) (string, string, error) {
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nameParts := strings.SplitN(reposName, "/", 2)
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if !strings.Contains(nameParts[0], ".") {
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// This is a Docker Index repos (ex: samalba/hipache or ubuntu)
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var err error
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if len(nameParts) < 2 {
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err = validateRepositoryName("library", nameParts[0])
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} else {
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err = validateRepositoryName(nameParts[0], nameParts[1])
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}
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return "https://index.docker.io/v1/", reposName, err
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}
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if len(nameParts) < 2 {
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// There is a dot in repos name (and no registry address)
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// Is it a Registry address without repos name?
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return "", "", errors.New("Invalid repository name (ex: \"registry.domain.tld/myrepos\")")
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}
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n := strings.LastIndex(reposName, "/")
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hostname := nameParts[0]
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path := reposName[len(nameParts[0]):n]
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reposName = reposName[n+1:]
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endpoint := fmt.Sprintf("https://%s%s/v1/", hostname, path)
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if err := pingRegistryEndpoint(endpoint); err != nil {
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utils.Debugf("Registry %s does not work (%s), falling back to http", endpoint, err)
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endpoint = fmt.Sprintf("http://%s%s/v1/", hostname, path)
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if err = pingRegistryEndpoint(endpoint); err != nil {
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//TODO: triggering highland build can be done there without "failing"
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return "", "", errors.New("Invalid Registry endpoint: " + err.Error())
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}
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}
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err := validateRepositoryName("library", reposName)
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return endpoint, reposName, err
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}
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func doWithCookies(c *http.Client, req *http.Request) (*http.Response, error) {
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@ -36,7 +88,7 @@ func doWithCookies(c *http.Client, req *http.Request) (*http.Response, error) {
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// Retrieve the history of a given image from the Registry.
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// Return a list of the parent's json (requested image included)
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func (r *Registry) GetRemoteHistory(imgId, registry string, token []string) ([]string, error) {
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req, err := http.NewRequest("GET", registry+"/images/"+imgId+"/ancestry", nil)
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req, err := http.NewRequest("GET", registry+"images/"+imgId+"/ancestry", nil)
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if err != nil {
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return nil, err
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}
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@ -67,7 +119,7 @@ func (r *Registry) GetRemoteHistory(imgId, registry string, token []string) ([]s
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func (r *Registry) LookupRemoteImage(imgId, registry string, token []string) bool {
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rt := &http.Transport{Proxy: http.ProxyFromEnvironment}
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req, err := http.NewRequest("GET", registry+"/images/"+imgId+"/json", nil)
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req, err := http.NewRequest("GET", registry+"images/"+imgId+"/json", nil)
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if err != nil {
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return false
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}
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@ -79,44 +131,10 @@ func (r *Registry) LookupRemoteImage(imgId, registry string, token []string) boo
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return res.StatusCode == 200
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}
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func (r *Registry) getImagesInRepository(repository string, authConfig *auth.AuthConfig) ([]map[string]string, error) {
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u := auth.IndexServerAddress() + "/repositories/" + repository + "/images"
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req, err := http.NewRequest("GET", u, nil)
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if err != nil {
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return nil, err
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}
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if authConfig != nil && len(authConfig.Username) > 0 {
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req.SetBasicAuth(authConfig.Username, authConfig.Password)
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}
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res, err := r.client.Do(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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// Repository doesn't exist yet
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if res.StatusCode == 404 {
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return nil, nil
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}
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jsonData, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return nil, err
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}
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imageList := []map[string]string{}
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if err := json.Unmarshal(jsonData, &imageList); err != nil {
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utils.Debugf("Body: %s (%s)\n", res.Body, u)
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return nil, err
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}
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return imageList, nil
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}
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// Retrieve an image from the Registry.
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func (r *Registry) GetRemoteImageJSON(imgId, registry string, token []string) ([]byte, int, error) {
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// Get the JSON
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req, err := http.NewRequest("GET", registry+"/images/"+imgId+"/json", nil)
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req, err := http.NewRequest("GET", registry+"images/"+imgId+"/json", nil)
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if err != nil {
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return nil, -1, fmt.Errorf("Failed to download json: %s", err)
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}
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@ -143,7 +161,7 @@ func (r *Registry) GetRemoteImageJSON(imgId, registry string, token []string) ([
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}
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func (r *Registry) GetRemoteImageLayer(imgId, registry string, token []string) (io.ReadCloser, error) {
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req, err := http.NewRequest("GET", registry+"/images/"+imgId+"/layer", nil)
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req, err := http.NewRequest("GET", registry+"images/"+imgId+"/layer", nil)
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if err != nil {
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return nil, fmt.Errorf("Error while getting from the server: %s\n", err)
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}
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@ -162,10 +180,7 @@ func (r *Registry) GetRemoteTags(registries []string, repository string, token [
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repository = "library/" + repository
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}
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for _, host := range registries {
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endpoint := fmt.Sprintf("%s/v1/repositories/%s/tags", host, repository)
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if !(strings.HasPrefix(endpoint, "http://") || strings.HasPrefix(endpoint, "https://")) {
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endpoint = fmt.Sprintf("%s://%s", UrlScheme(), endpoint)
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}
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endpoint := fmt.Sprintf("%srepositories/%s/tags", host, repository)
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req, err := r.opaqueRequest("GET", endpoint, nil)
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if err != nil {
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return nil, err
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@ -198,8 +213,8 @@ func (r *Registry) GetRemoteTags(registries []string, repository string, token [
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return nil, fmt.Errorf("Could not reach any registry endpoint")
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}
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func (r *Registry) GetRepositoryData(remote string) (*RepositoryData, error) {
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repositoryTarget := auth.IndexServerAddress() + "/repositories/" + remote + "/images"
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func (r *Registry) GetRepositoryData(indexEp, remote string) (*RepositoryData, error) {
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repositoryTarget := fmt.Sprintf("%srepositories/%s/images", indexEp, remote)
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req, err := r.opaqueRequest("GET", repositoryTarget, nil)
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if err != nil {
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@ -230,8 +245,12 @@ func (r *Registry) GetRepositoryData(remote string) (*RepositoryData, error) {
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}
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var endpoints []string
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var urlScheme = indexEp[:strings.Index(indexEp, ":")]
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if res.Header.Get("X-Docker-Endpoints") != "" {
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endpoints = res.Header["X-Docker-Endpoints"]
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// The Registry's URL scheme has to match the Index'
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for _, ep := range res.Header["X-Docker-Endpoints"] {
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endpoints = append(endpoints, fmt.Sprintf("%s://%s/v1/", urlScheme, ep))
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}
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} else {
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return nil, fmt.Errorf("Index response didn't contain any endpoints")
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}
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@ -260,9 +279,8 @@ func (r *Registry) GetRepositoryData(remote string) (*RepositoryData, error) {
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// Push a local image to the registry
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func (r *Registry) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string, token []string) error {
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registry = registry + "/v1"
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// FIXME: try json with UTF8
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req, err := http.NewRequest("PUT", registry+"/images/"+imgData.ID+"/json", strings.NewReader(string(jsonRaw)))
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req, err := http.NewRequest("PUT", registry+"images/"+imgData.ID+"/json", strings.NewReader(string(jsonRaw)))
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if err != nil {
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return err
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}
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@ -296,8 +314,7 @@ func (r *Registry) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, regis
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}
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func (r *Registry) PushImageLayerRegistry(imgId string, layer io.Reader, registry string, token []string) error {
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registry = registry + "/v1"
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req, err := http.NewRequest("PUT", registry+"/images/"+imgId+"/layer", layer)
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req, err := http.NewRequest("PUT", registry+"images/"+imgId+"/layer", layer)
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if err != nil {
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return err
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}
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@ -334,9 +351,8 @@ func (r *Registry) opaqueRequest(method, urlStr string, body io.Reader) (*http.R
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func (r *Registry) PushRegistryTag(remote, revision, tag, registry string, token []string) error {
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// "jsonify" the string
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revision = "\"" + revision + "\""
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registry = registry + "/v1"
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req, err := r.opaqueRequest("PUT", registry+"/repositories/"+remote+"/tags/"+tag, strings.NewReader(revision))
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req, err := r.opaqueRequest("PUT", registry+"repositories/"+remote+"/tags/"+tag, strings.NewReader(revision))
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if err != nil {
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return err
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}
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@ -354,7 +370,7 @@ func (r *Registry) PushRegistryTag(remote, revision, tag, registry string, token
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return nil
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}
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func (r *Registry) PushImageJSONIndex(remote string, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error) {
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func (r *Registry) PushImageJSONIndex(indexEp, remote string, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error) {
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imgListJSON, err := json.Marshal(imgList)
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if err != nil {
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return nil, err
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@ -364,9 +380,10 @@ func (r *Registry) PushImageJSONIndex(remote string, imgList []*ImgData, validat
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suffix = "images"
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}
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u := fmt.Sprintf("%srepositories/%s/%s", indexEp, remote, suffix)
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utils.Debugf("PUT %s", u)
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utils.Debugf("Image list pushed to index:\n%s\n", imgListJSON)
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req, err := r.opaqueRequest("PUT", auth.IndexServerAddress()+"/repositories/"+remote+"/"+suffix, bytes.NewReader(imgListJSON))
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req, err := r.opaqueRequest("PUT", u, bytes.NewReader(imgListJSON))
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if err != nil {
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return nil, err
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}
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@ -404,6 +421,7 @@ func (r *Registry) PushImageJSONIndex(remote string, imgList []*ImgData, validat
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}
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var tokens, endpoints []string
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var urlScheme = indexEp[:strings.Index(indexEp, ":")]
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if !validate {
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if res.StatusCode != 200 && res.StatusCode != 201 {
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errBody, err := ioutil.ReadAll(res.Body)
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@ -420,7 +438,10 @@ func (r *Registry) PushImageJSONIndex(remote string, imgList []*ImgData, validat
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}
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if res.Header.Get("X-Docker-Endpoints") != "" {
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endpoints = res.Header["X-Docker-Endpoints"]
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// The Registry's URL scheme has to match the Index'
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for _, ep := range res.Header["X-Docker-Endpoints"] {
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endpoints = append(endpoints, fmt.Sprintf("%s://%s/v1/", urlScheme, ep))
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}
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} else {
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return nil, fmt.Errorf("Index response didn't contain any endpoints")
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}
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@ -442,7 +463,7 @@ func (r *Registry) PushImageJSONIndex(remote string, imgList []*ImgData, validat
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}
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func (r *Registry) SearchRepositories(term string) (*SearchResults, error) {
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u := auth.IndexServerAddress() + "/search?q=" + url.QueryEscape(term)
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u := auth.IndexServerAddress() + "search?q=" + url.QueryEscape(term)
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req, err := http.NewRequest("GET", u, nil)
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if err != nil {
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return nil, err
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