registry

package
v17.13.4+incompatible Latest Latest
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 Go to latest Published: Mar 18, 2019 License: Apache-2.0 Imports: 38 Imported by: 0

Documentation

Overview

Package registry contains client primitives to interact with a remote Docker registry.

Index

Constants

View Source 
const (
	// AuthClientID is used the ClientID used for the token server
	AuthClientID = "docker"
)
View Source 
const (
	// DefaultSearchLimit is the default value for maximum number of returned search results.
	DefaultSearchLimit = 25
)

Variables

View Source 
var (
	// DefaultNamespace is the default namespace
	DefaultNamespace = "docker.io"
	// DefaultRegistryVersionHeader is the name of the default HTTP header
	// that carries Registry version info
	DefaultRegistryVersionHeader = "Docker-Distribution-Api-Version"

	// IndexHostname is the index hostname
	IndexHostname = "index.docker.io"
	// IndexServer is used for user auth and image search
	IndexServer = "https://" + IndexHostname + "/v1/"
	// IndexName is the name of the index
	IndexName = "docker.io"

	// NotaryServer is the endpoint serving the Notary trust server
	NotaryServer = "https://notary.docker.io"

	// DefaultV2Registry is the URI of the default v2 registry
	DefaultV2Registry = &url.URL{
		Scheme: "https",
		Host:   "registry-1.docker.io",
	}
)
View Source 
var (
	// CertsDir is the directory where certificates are stored
	CertsDir = "/etc/balena-engine/certs.d"
)
View Source 
var (
	// ErrAlreadyExists is an error returned if an image being pushed
	// already exists on the remote side
	ErrAlreadyExists = errors.New("Image already exists")
)
View Source 
var (
	// ErrInvalidRepositoryName is an error returned if the repository name did
	// not have the correct form
	ErrInvalidRepositoryName = errors.New("Invalid repository name (ex: \"registry.domain.tld/myrepos\")")
)
View Source 
var (
	// ErrRepoNotFound is returned if the repository didn't exist on the
	// remote side
	ErrRepoNotFound notFoundError = "Repository not found"
)

Functions

func AuthTransport 

func AuthTransport(base http.RoundTripper, authConfig *types.AuthConfig, alwaysSetBasicAuth bool) http.RoundTripper

AuthTransport handles the auth layer when communicating with a v1 registry (private or official)

For private v1 registries, set alwaysSetBasicAuth to true.

For the official v1 registry, if there isn't already an Authorization header in the request, but there is an X-Docker-Token header set to true, then Basic Auth will be used to set the Authorization header. After sending the request with the provided base http.RoundTripper, if an X-Docker-Token header, representing a token, is present in the response, then it gets cached and sent in the Authorization header of all subsequent requests.

If the server sends a token without the client having requested it, it is ignored.

This RoundTripper also has a CancelRequest method important for correct timeout handling.

func ConvertToHostname 

func ConvertToHostname(url string) string

ConvertToHostname converts a registry url which has http|https prepended to just an hostname.

func GetAuthConfigKey 

func GetAuthConfigKey(index *registrytypes.IndexInfo) string

GetAuthConfigKey special-cases using the full index address of the official index as the AuthConfig key, and uses the (host)name[:port] for private indexes.

func HTTPClient 

func HTTPClient(transport http.RoundTripper) *http.Client

HTTPClient returns an HTTP client structure which uses the given transport and contains the necessary headers for redirected requests

func Headers 

func Headers(userAgent string, metaHeaders http.Header) []transport.RequestModifier

Headers returns request modifiers with a User-Agent and metaHeaders

func NewStaticCredentialStore 

func NewStaticCredentialStore(auth *types.AuthConfig) auth.CredentialStore

NewStaticCredentialStore returns a credential store which always returns the same credential values.

func NewTransport 

func NewTransport(tlsConfig *tls.Config) *http.Transport

NewTransport returns a new HTTP transport. If tlsConfig is nil, it uses the default TLS configuration.

func ParseSearchIndexInfo 

func ParseSearchIndexInfo(reposName string) (*registrytypes.IndexInfo, error)

ParseSearchIndexInfo will use repository name to get back an indexInfo.

func PingV2Registry 

func PingV2Registry(endpoint *url.URL, transport http.RoundTripper) (challenge.Manager, bool, error)

PingV2Registry attempts to ping a v2 registry and on success return a challenge manager for the supported authentication types and whether v2 was confirmed by the response. If a response is received but cannot be interpreted a PingResponseError will be returned. nolint: interfacer

func ReadCertsDirectory 

func ReadCertsDirectory(tlsConfig *tls.Config, directory string) error

ReadCertsDirectory reads the directory for TLS certificates including roots and certificate pairs and updates the provided TLS configuration.

func ResolveAuthConfig 

func ResolveAuthConfig(authConfigs map[string]types.AuthConfig, index *registrytypes.IndexInfo) types.AuthConfig

ResolveAuthConfig matches an auth configuration to a server address or a URL

func ValidateIndexName 

func ValidateIndexName(val string) (string, error)

ValidateIndexName validates an index name.

func ValidateMirror 

func ValidateMirror(val string) (string, error)

ValidateMirror validates an HTTP(S) registry mirror

Types

type APIEndpoint 

type APIEndpoint struct {
	Mirror                         bool
	URL                            *url.URL
	Version                        APIVersion
	AllowNondistributableArtifacts bool
	Official                       bool
	TrimHostname                   bool
	TLSConfig                      *tls.Config
}

APIEndpoint represents a remote API endpoint

func (APIEndpoint) ToV1Endpoint 

func (e APIEndpoint) ToV1Endpoint(userAgent string, metaHeaders http.Header) *V1Endpoint

ToV1Endpoint returns a V1 API endpoint based on the APIEndpoint

type APIVersion 

type APIVersion int

APIVersion is an integral representation of an API version (presently either 1 or 2) 

const (
	APIVersion1 APIVersion = iota
	APIVersion2
)

API Version identifiers.

func (APIVersion) String 

func (av APIVersion) String() string

type DefaultService 

type DefaultService struct {
	// contains filtered or unexported fields
}

DefaultService is a registry service. It tracks configuration data such as a list of mirrors.

func NewService 

func NewService(options ServiceOptions) (*DefaultService, error)

NewService returns a new instance of DefaultService ready to be installed into an engine.

func (*DefaultService) Auth 

func (s *DefaultService) Auth(ctx context.Context, authConfig *types.AuthConfig, userAgent string) (status, token string, err error)

Auth contacts the public registry with the provided credentials, and returns OK if authentication was successful. It can be used to verify the validity of a client's credentials.

func (*DefaultService) LoadAllowNondistributableArtifacts 

func (s *DefaultService) LoadAllowNondistributableArtifacts(registries []string) error

LoadAllowNondistributableArtifacts loads allow-nondistributable-artifacts registries for Service.

func (*DefaultService) LoadInsecureRegistries 

func (s *DefaultService) LoadInsecureRegistries(registries []string) error

LoadInsecureRegistries loads insecure registries for Service

func (*DefaultService) LoadMirrors 

func (s *DefaultService) LoadMirrors(mirrors []string) error

LoadMirrors loads registry mirrors for Service

func (*DefaultService) LookupPullEndpoints 

func (s *DefaultService) LookupPullEndpoints(hostname string) (endpoints []APIEndpoint, err error)

LookupPullEndpoints creates a list of endpoints to try to pull from, in order of preference. It gives preference to v2 endpoints over v1, mirrors over the actual registry, and HTTPS over plain HTTP.

func (*DefaultService) LookupPushEndpoints 

func (s *DefaultService) LookupPushEndpoints(hostname string) (endpoints []APIEndpoint, err error)

LookupPushEndpoints creates a list of endpoints to try to push to, in order of preference. It gives preference to v2 endpoints over v1, and HTTPS over plain HTTP. Mirrors are not included.

func (*DefaultService) ResolveRepository 

func (s *DefaultService) ResolveRepository(name reference.Named) (*RepositoryInfo, error)

ResolveRepository splits a repository name into its components and configuration of the associated registry.

func (*DefaultService) Search 

func (s *DefaultService) Search(ctx context.Context, term string, limit int, authConfig *types.AuthConfig, userAgent string, headers map[string][]string) (*registrytypes.SearchResults, error)

Search queries the public registry for images matching the specified search terms, and returns the results.

func (*DefaultService) ServiceConfig 

func (s *DefaultService) ServiceConfig() *registrytypes.ServiceConfig

ServiceConfig returns the public registry service configuration.

func (*DefaultService) TLSConfig 

func (s *DefaultService) TLSConfig(hostname string) (*tls.Config, error)

TLSConfig constructs a client TLS configuration based on server defaults

type ImgData 

type ImgData struct {
	// ID is an opaque string that identifies the image
	ID              string `json:"id"`
	Checksum        string `json:"checksum,omitempty"`
	ChecksumPayload string `json:"-"`
	Tag             string `json:",omitempty"`
}

ImgData is used to transfer image checksums to and from the registry

type PingResponseError 

type PingResponseError struct {
	Err error
}

PingResponseError is used when the response from a ping was received but invalid.

func (PingResponseError) Error 

func (err PingResponseError) Error() string

type PingResult 

type PingResult struct {
	// Version is the registry version supplied by the registry in an HTTP
	// header
	Version string `json:"version"`
	// Standalone is set to true if the registry indicates it is a
	// standalone registry in the X-Docker-Registry-Standalone
	// header
	Standalone bool `json:"standalone"`
}

PingResult contains the information returned when pinging a registry. It indicates the registry's version and whether the registry claims to be a standalone registry.

type RepositoryData 

type RepositoryData struct {
	// ImgList is a list of images in the repository
	ImgList map[string]*ImgData
	// Endpoints is a list of endpoints returned in X-Docker-Endpoints
	Endpoints []string
}

RepositoryData tracks the image list, list of endpoints for a repository

type RepositoryInfo 

type RepositoryInfo struct {
	Name reference.Named
	// Index points to registry information
	Index *registrytypes.IndexInfo
	// Official indicates whether the repository is considered official.
	// If the registry is official, and the normalized name does not
	// contain a '/' (e.g. "foo"), then it is considered an official repo.
	Official bool
	// Class represents the class of the repository, such as "plugin"
	// or "image".
	Class string
}

RepositoryInfo describes a repository

func ParseRepositoryInfo 

func ParseRepositoryInfo(reposName reference.Named) (*RepositoryInfo, error)

ParseRepositoryInfo performs the breakdown of a repository name into a RepositoryInfo, but lacks registry configuration.

type Service 

type Service interface {
	Auth(ctx context.Context, authConfig *types.AuthConfig, userAgent string) (status, token string, err error)
	LookupPullEndpoints(hostname string) (endpoints []APIEndpoint, err error)
	LookupPushEndpoints(hostname string) (endpoints []APIEndpoint, err error)
	ResolveRepository(name reference.Named) (*RepositoryInfo, error)
	Search(ctx context.Context, term string, limit int, authConfig *types.AuthConfig, userAgent string, headers map[string][]string) (*registrytypes.SearchResults, error)
	ServiceConfig() *registrytypes.ServiceConfig
	TLSConfig(hostname string) (*tls.Config, error)
	LoadAllowNondistributableArtifacts([]string) error
	LoadMirrors([]string) error
	LoadInsecureRegistries([]string) error
}

Service is the interface defining what a registry service should implement.

type ServiceOptions 

type ServiceOptions struct {
	AllowNondistributableArtifacts []string `json:"allow-nondistributable-artifacts,omitempty"`
	Mirrors                        []string `json:"registry-mirrors,omitempty"`
	InsecureRegistries             []string `json:"insecure-registries,omitempty"`

	// V2Only controls access to legacy registries.  If it is set to true via the
	// command line flag the daemon will not attempt to contact v1 legacy registries
	V2Only bool `json:"disable-legacy-registry,omitempty"`
}

ServiceOptions holds command line options.

type Session 

type Session struct {
	// contains filtered or unexported fields
}

A Session is used to communicate with a V1 registry

func NewSession 

func NewSession(client *http.Client, authConfig *types.AuthConfig, endpoint *V1Endpoint) (*Session, error)

NewSession creates a new session TODO(tiborvass): remove authConfig param once registry client v2 is vendored

func (*Session) GetRemoteHistory 

func (r *Session) GetRemoteHistory(imgID, registry string) ([]string, error)

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 (*Session) GetRemoteImageJSON 

func (r *Session) GetRemoteImageJSON(imgID, registry string) ([]byte, int64, error)

GetRemoteImageJSON retrieves an image's JSON metadata from the registry.

func (*Session) GetRemoteImageLayer 

func (r *Session) GetRemoteImageLayer(imgID, registry string, imgSize int64) (io.ReadCloser, error)

GetRemoteImageLayer retrieves an image layer from the registry

func (*Session) GetRemoteTag 

func (r *Session) GetRemoteTag(registries []string, repositoryRef reference.Named, askedTag string) (string, error)

GetRemoteTag retrieves the tag named in the askedTag argument from the given repository. It queries each of the registries supplied in the registries argument, and returns data from the first one that answers the query successfully.

func (*Session) GetRemoteTags 

func (r *Session) GetRemoteTags(registries []string, repositoryRef reference.Named) (map[string]string, error)

GetRemoteTags retrieves all tags from the given repository. It queries each of the registries supplied in the registries argument, and returns data from the first one that answers the query successfully. It returns a map with tag names as the keys and image IDs as the values.

func (*Session) GetRepositoryData 

func (r *Session) GetRepositoryData(name reference.Named) (*RepositoryData, error)

GetRepositoryData returns lists of images and endpoints for the repository

func (*Session) ID 

func (r *Session) ID() string

ID returns this registry session's ID.

func (*Session) LookupRemoteImage 

func (r *Session) LookupRemoteImage(imgID, registry string) error

LookupRemoteImage checks if an image exists in the registry

func (*Session) PushImageChecksumRegistry 

func (r *Session) PushImageChecksumRegistry(imgData *ImgData, registry string) error

PushImageChecksumRegistry uploads checksums for an image

func (*Session) PushImageJSONIndex 

func (r *Session) PushImageJSONIndex(remote reference.Named, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error)

PushImageJSONIndex uploads an image list to the repository

func (*Session) PushImageJSONRegistry 

func (r *Session) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string) error

PushImageJSONRegistry pushes JSON metadata for a local image to the registry

func (*Session) PushImageLayerRegistry 

func (r *Session) PushImageLayerRegistry(imgID string, layer io.Reader, registry string, jsonRaw []byte) (checksum string, checksumPayload string, err error)

PushImageLayerRegistry sends the checksum of an image layer to the registry

func (*Session) PushRegistryTag 

func (r *Session) PushRegistryTag(remote reference.Named, revision, tag, registry string) error

PushRegistryTag pushes a tag on the registry. Remote has the format '<user>/<repo>

func (*Session) SearchRepositories 

func (r *Session) SearchRepositories(term string, limit int) (*registrytypes.SearchResults, error)

SearchRepositories performs a search against the remote repository

type V1Endpoint 

type V1Endpoint struct {
	URL      *url.URL
	IsSecure bool
	// contains filtered or unexported fields
}

V1Endpoint stores basic information about a V1 registry endpoint.

func NewV1Endpoint 

func NewV1Endpoint(index *registrytypes.IndexInfo, userAgent string, metaHeaders http.Header) (*V1Endpoint, error)

NewV1Endpoint parses the given address to return a registry endpoint.

func (*V1Endpoint) Path 

func (e *V1Endpoint) Path(path string) string

Path returns a formatted string for the URL of this endpoint with the given path appended.

func (*V1Endpoint) Ping 

func (e *V1Endpoint) Ping() (PingResult, error)

Ping returns a PingResult which indicates whether the registry is standalone or not.

func (*V1Endpoint) String 

func (e *V1Endpoint) String() string

Get the formatted URL for the root of this registry Endpoint

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