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package registry // import "github.com/docker/docker/registry"
import (
"context"
"crypto/tls"
"net/url"
"strings"
"sync"
"github.com/containerd/log"
"github.com/distribution/reference"
"github.com/docker/docker/api/types/registry"
"github.com/docker/docker/errdefs"
)
// Service is a registry service. It tracks configuration data such as a list
// of mirrors.
type Service struct {
config *serviceConfig
mu sync.RWMutex
}
// NewService returns a new instance of [Service] ready to be installed into
// an engine.
func NewService(options ServiceOptions) (*Service, error) {
config, err := newServiceConfig(options)
return &Service{config: config}, err
}
// ServiceConfig returns a copy of the public registry service's configuration.
func (s *Service) ServiceConfig() *registry.ServiceConfig {
s.mu.RLock()
defer s.mu.RUnlock()
return s.config.copy()
}
// ReplaceConfig prepares a transaction which will atomically replace the
// registry service's configuration when the returned commit function is called.
func (s *Service) ReplaceConfig(options ServiceOptions) (commit func(), err error) {
config, err := newServiceConfig(options)
if err != nil {
return nil, err
}
return func() {
s.mu.Lock()
defer s.mu.Unlock()
s.config = config
}, nil
}
// 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 (s *Service) Auth(ctx context.Context, authConfig *registry.AuthConfig, userAgent string) (status, token string, err error) {
// TODO Use ctx when searching for repositories
registryHostName := IndexHostname
if authConfig.ServerAddress != "" {
serverAddress := authConfig.ServerAddress
if !strings.HasPrefix(serverAddress, "https://") && !strings.HasPrefix(serverAddress, "http://") {
serverAddress = "https://" + serverAddress
}
u, err := url.Parse(serverAddress)
if err != nil {
return "", "", invalidParamWrapf(err, "unable to parse server address")
}
registryHostName = u.Host
}
// Lookup endpoints for authentication using "LookupPushEndpoints", which
// excludes mirrors to prevent sending credentials of the upstream registry
// to a mirror.
endpoints, err := s.LookupPushEndpoints(registryHostName)
if err != nil {
return "", "", invalidParam(err)
}
for _, endpoint := range endpoints {
status, token, err = loginV2(authConfig, endpoint, userAgent)
if err == nil {
return
}
if errdefs.IsUnauthorized(err) {
// Failed to authenticate; don't continue with (non-TLS) endpoints.
return status, token, err
}
log.G(ctx).WithError(err).Infof("Error logging in to endpoint, trying next endpoint")
}
return "", "", err
}
// ResolveRepository splits a repository name into its components
// and configuration of the associated registry.
func (s *Service) ResolveRepository(name reference.Named) (*RepositoryInfo, error) {
s.mu.RLock()
defer s.mu.RUnlock()
return newRepositoryInfo(s.config, name)
}
// APIEndpoint represents a remote API endpoint
type APIEndpoint struct {
Mirror bool
URL *url.URL
Version APIVersion // Deprecated: v1 registries are deprecated, and endpoints are always v2.
AllowNondistributableArtifacts bool
Official bool
TrimHostname bool
TLSConfig *tls.Config
}
// LookupPullEndpoints creates a list of v2 endpoints to try to pull from, in order of preference.
// It gives preference to mirrors over the actual registry, and HTTPS over plain HTTP.
func (s *Service) LookupPullEndpoints(hostname string) (endpoints []APIEndpoint, err error) {
s.mu.RLock()
defer s.mu.RUnlock()
return s.lookupV2Endpoints(hostname)
}
// LookupPushEndpoints creates a list of v2 endpoints to try to push to, in order of preference.
// It gives preference to HTTPS over plain HTTP. Mirrors are not included.
func (s *Service) LookupPushEndpoints(hostname string) (endpoints []APIEndpoint, err error) {
s.mu.RLock()
defer s.mu.RUnlock()
allEndpoints, err := s.lookupV2Endpoints(hostname)
if err == nil {
for _, endpoint := range allEndpoints {
if !endpoint.Mirror {
endpoints = append(endpoints, endpoint)
}
}
}
return endpoints, err
}
// IsInsecureRegistry returns true if the registry at given host is configured as
// insecure registry.
func (s *Service) IsInsecureRegistry(host string) bool {
s.mu.RLock()
defer s.mu.RUnlock()
return !s.config.isSecureIndex(host)
}
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