Golang reference.Canonical类代码示例

// BuildBlobURL constructs the url for the blob identified by name and dgst.
func (ub *URLBuilder) BuildBlobURL(ref reference.Canonical) (string, error) {
	route := ub.cloneRoute(RouteNameBlob)

	layerURL, err := route.URL("name", ref.Name(), "digest", ref.Digest().String())
	if err != nil {
		return "", err
	}

	return layerURL.String(), nil
}

func (cli *DockerCli) tagTrusted(trustedRef reference.Canonical, ref reference.NamedTagged) error {
	fmt.Fprintf(cli.out, "Tagging %s as %s\n", trustedRef.String(), ref.String())

	options := types.ImageTagOptions{
		ImageID:        trustedRef.String(),
		RepositoryName: trustedRef.Name(),
		Tag:            ref.Tag(),
		Force:          true,
	}

	return cli.client.ImageTag(options)
}

func (cli *DockerCli) tagTrusted(trustedRef reference.Canonical, ref reference.NamedTagged) error {
	fmt.Fprintf(cli.out, "Tagging %s as %s\n", trustedRef.String(), ref.String())
	tv := url.Values{}
	tv.Set("repo", trustedRef.Name())
	tv.Set("tag", ref.Tag())
	tv.Set("force", "1")

	if _, _, err := readBody(cli.call("POST", "/images/"+trustedRef.String()+"/tag?"+tv.Encode(), nil, nil)); err != nil {
		return err
	}

	return nil
}

// NewRegistryPullThroughCache creates a registry acting as a pull through cache
func NewRegistryPullThroughCache(ctx context.Context, registry distribution.Namespace, driver driver.StorageDriver, config configuration.Proxy) (distribution.Namespace, error) {
	remoteURL, err := url.Parse(config.RemoteURL)
	if err != nil {
		return nil, err
	}

	v := storage.NewVacuum(ctx, driver)
	s := scheduler.New(ctx, driver, "/scheduler-state.json")
	s.OnBlobExpire(func(ref reference.Reference) error {
		var r reference.Canonical
		var ok bool
		if r, ok = ref.(reference.Canonical); !ok {
			return fmt.Errorf("unexpected reference type : %T", ref)
		}

		repo, err := registry.Repository(ctx, r)
		if err != nil {
			return err
		}

		blobs := repo.Blobs(ctx)

		// Clear the repository reference and descriptor caches
		err = blobs.Delete(ctx, r.Digest())
		if err != nil {
			return err
		}

		err = v.RemoveBlob(r.Digest().String())
		if err != nil {
			return err
		}

		return nil
	})

	s.OnManifestExpire(func(ref reference.Reference) error {
		var r reference.Canonical
		var ok bool
		if r, ok = ref.(reference.Canonical); !ok {
			return fmt.Errorf("unexpected reference type : %T", ref)
		}

		repo, err := registry.Repository(ctx, r)
		if err != nil {
			return err
		}

		manifests, err := repo.Manifests(ctx)
		if err != nil {
			return err
		}
		err = manifests.Delete(ctx, r.Digest())
		if err != nil {
			return err
		}
		return nil
	})

	err = s.Start()
	if err != nil {
		return nil, err
	}

	cs, err := configureAuth(config.Username, config.Password, config.RemoteURL)
	if err != nil {
		return nil, err
	}

	return &proxyingRegistry{
		embedded:  registry,
		scheduler: s,
		remoteURL: *remoteURL,
		authChallenger: &remoteAuthChallenger{
			remoteURL: *remoteURL,
			cm:        auth.NewSimpleChallengeManager(),
			cs:        cs,
		},
	}, nil
}

func (cli *DockerCli) createContainer(config *runconfig.Config, hostConfig *runconfig.HostConfig, cidfile, name string) (*types.ContainerCreateResponse, error) {
	mergedConfig := runconfig.MergeConfigs(config, hostConfig)

	var containerIDFile *cidFile
	if cidfile != "" {
		var err error
		if containerIDFile, err = newCIDFile(cidfile); err != nil {
			return nil, err
		}
		defer containerIDFile.Close()
	}

	ref, err := reference.ParseNamed(config.Image)
	if err != nil {
		return nil, err
	}

	isDigested := false
	switch ref.(type) {
	case reference.Tagged:
	case reference.Digested:
		isDigested = true
	default:
		ref, err = reference.WithTag(ref, tagpkg.DefaultTag)
		if err != nil {
			return nil, err
		}
	}

	var trustedRef reference.Canonical

	if isTrusted() && !isDigested {
		var err error
		trustedRef, err = cli.trustedReference(ref.(reference.NamedTagged))
		if err != nil {
			return nil, err
		}
		config.Image = trustedRef.String()
	}

	//create the container
	response, err := cli.client.ContainerCreate(mergedConfig, name)
	//if image not found try to pull it
	if err != nil {
		if lib.IsErrImageNotFound(err) {
			fmt.Fprintf(cli.err, "Unable to find image '%s' locally\n", ref.String())

			// we don't want to write to stdout anything apart from container.ID
			if err = cli.pullImageCustomOut(config.Image, cli.err); err != nil {
				return nil, err
			}
			if trustedRef != nil && !isDigested {
				if err := cli.tagTrusted(trustedRef, ref.(reference.NamedTagged)); err != nil {
					return nil, err
				}
			}
			// Retry
			var retryErr error
			response, retryErr = cli.client.ContainerCreate(mergedConfig, name)
			if retryErr != nil {
				return nil, retryErr
			}
		} else {
			return nil, err
		}
	}

	for _, warning := range response.Warnings {
		fmt.Fprintf(cli.err, "WARNING: %s\n", warning)
	}
	if containerIDFile != nil {
		if err = containerIDFile.Write(response.ID); err != nil {
			return nil, err
		}
	}
	return &response, nil
}

func (cli *DockerCli) createContainer(config *runconfig.Config, hostConfig *runconfig.HostConfig, cidfile, name string) (*types.ContainerCreateResponse, error) {
	containerValues := url.Values{}
	if name != "" {
		containerValues.Set("name", name)
	}

	mergedConfig := runconfig.MergeConfigs(config, hostConfig)

	var containerIDFile *cidFile
	if cidfile != "" {
		var err error
		if containerIDFile, err = newCIDFile(cidfile); err != nil {
			return nil, err
		}
		defer containerIDFile.Close()
	}

	ref, err := reference.ParseNamed(config.Image)
	if err != nil {
		return nil, err
	}

	isDigested := false
	switch ref.(type) {
	case reference.Tagged:
	case reference.Digested:
		isDigested = true
	default:
		ref, err = reference.WithTag(ref, tagpkg.DefaultTag)
		if err != nil {
			return nil, err
		}
	}

	var trustedRef reference.Canonical

	if isTrusted() && !isDigested {
		var err error
		trustedRef, err = cli.trustedReference(ref.(reference.NamedTagged))
		if err != nil {
			return nil, err
		}
		config.Image = trustedRef.String()
	}

	//create the container
	serverResp, err := cli.call("POST", "/containers/create?"+containerValues.Encode(), mergedConfig, nil)
	//if image not found try to pull it
	if serverResp.statusCode == 404 && strings.Contains(err.Error(), config.Image) {
		fmt.Fprintf(cli.err, "Unable to find image '%s' locally\n", ref.String())

		// we don't want to write to stdout anything apart from container.ID
		if err = cli.pullImageCustomOut(config.Image, cli.err); err != nil {
			return nil, err
		}
		if trustedRef != nil && !isDigested {
			if err := cli.tagTrusted(trustedRef, ref.(reference.NamedTagged)); err != nil {
				return nil, err
			}
		}
		// Retry
		if serverResp, err = cli.call("POST", "/containers/create?"+containerValues.Encode(), mergedConfig, nil); err != nil {
			return nil, err
		}
	} else if err != nil {
		return nil, err
	}

	defer serverResp.body.Close()

	var response types.ContainerCreateResponse
	if err := json.NewDecoder(serverResp.body).Decode(&response); err != nil {
		return nil, err
	}
	for _, warning := range response.Warnings {
		fmt.Fprintf(cli.err, "WARNING: %s\n", warning)
	}
	if containerIDFile != nil {
		if err = containerIDFile.Write(response.ID); err != nil {
			return nil, err
		}
	}
	return &response, nil
}