server

package
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Published: Mar 15, 2018 License: Apache-2.0 Imports: 54 Imported by: 0

Documentation

Overview

Package server wraps repository and blob store objects of docker/distribution upstream. Most significantly, the wrappers cause manifests to be stored in OpenShift's etcd store instead of registry's storage. Registry's middleware API is utilized to register the object factories.

Module with quotaRestrictedBlobStore defines a wrapper for upstream blob store that does an image quota and limits check before committing image layer to a registry. Master server contains admission check that will refuse the manifest if the image exceeds whatever quota or limit set. But the check occurs too late (after the layers are written). This addition allows us to refuse the layers and thus keep the storage clean.

*Note*: Here, we take into account just a single layer, not the image as a whole because the layers are uploaded before the manifest. This leads to a situation where several layers can be written until a big enough layer will be received that exceeds the limit.

Index

Constants

View Source
const (
	RealmKey      = "realm"
	TokenRealmKey = "tokenrealm"
)
View Source
const (
	// DockerRegistryURLEnvVar is a mandatory environment variable name specifying url of internal docker
	// registry. All references to pushed images will be prefixed with its value.
	// DEPRECATED: Use the OPENSHIFT_DEFAULT_REGISTRY instead.
	DockerRegistryURLEnvVar = "DOCKER_REGISTRY_URL"

	// DockerRegistryURLEnvVarOption is an optional environment that overrides the
	// DOCKER_REGISTRY_URL.
	DockerRegistryURLEnvVarOption = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_DOCKERREGISTRYURL"

	// OpenShiftDefaultRegistry overrides the DockerRegistryURLEnvVar as in OpenShift the
	// default registry URL is controller by this environment variable.
	OpenShiftDefaultRegistryEnvVar = "OPENSHIFT_DEFAULT_REGISTRY"

	// EnforceQuotaEnvVar is a boolean environment variable that allows to turn quota enforcement on or off.
	// By default, quota enforcement is off. It overrides openshift middleware configuration option.
	// Recognized values are "true" and "false".
	EnforceQuotaEnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_ENFORCEQUOTA"

	// ProjectCacheTTLEnvVar is an environment variable specifying an eviction timeout for project quota
	// objects. It takes a valid time duration string (e.g. "2m"). If empty, you get the default timeout. If
	// zero (e.g. "0m"), caching is disabled.
	ProjectCacheTTLEnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_PROJECTCACHETTL"

	// AcceptSchema2EnvVar is a boolean environment variable that allows to accept manifest schema v2
	// on manifest put requests.
	AcceptSchema2EnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_ACCEPTSCHEMA2"

	// BlobRepositoryCacheTTLEnvVar  is an environment variable specifying an eviction timeout for <blob
	// belongs to repository> entries. The higher the value, the faster queries but also a higher risk of
	// leaking a blob that is no longer tagged in given repository.
	BlobRepositoryCacheTTLEnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_BLOBREPOSITORYCACHETTL"

	// Pullthrough is a boolean environment variable that controls whether pullthrough is enabled.
	PullthroughEnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_PULLTHROUGH"

	// MirrorPullthrough is a boolean environment variable that controls mirroring of blobs on pullthrough.
	MirrorPullthroughEnvVar = "REGISTRY_MIDDLEWARE_REPOSITORY_OPENSHIFT_MIRRORPULLTHROUGH"
)

Environment variables.

Variables

View Source
var (
	// Challenging errors
	ErrTokenRequired         = errors.New("authorization header required")
	ErrTokenInvalid          = errors.New("failed to decode credentials")
	ErrOpenShiftAccessDenied = errors.New("access denied")

	// Non-challenging errors
	ErrNamespaceRequired   = errors.New("repository namespace required")
	ErrUnsupportedAction   = errors.New("unsupported action")
	ErrUnsupportedResource = errors.New("unsupported resource")
)

Errors used and exported by this package.

View Source
var (
	ErrorCodeSignatureInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
		Value:          "SIGNATURE_INVALID",
		Message:        "invalid image signature",
		HTTPStatusCode: http.StatusBadRequest,
	})

	ErrorCodeSignatureAlreadyExists = errcode.Register(errGroup, errcode.ErrorDescriptor{
		Value:          "SIGNATURE_EXISTS",
		Message:        "image signature already exists",
		HTTPStatusCode: http.StatusConflict,
	})
)

Functions

func NewApp

func NewApp(ctx context.Context, registryClient client.RegistryClient, dockerConfig *configuration.Configuration, extraConfig *registryconfig.Configuration, writeLimiter maxconnections.Limiter) http.Handler

NewApp configures the registry application and returns http.Handler for it. The program will be terminated if an error happens.

func NewSignatureDispatcher

func NewSignatureDispatcher(isImageClient client.ImageStreamImagesNamespacer) func(*handlers.Context, *http.Request) http.Handler

NewSignatureDispatcher provides a function that handles the GET and PUT requests for signature endpoint.

func NewTokenHandler added in v1.3.0

func NewTokenHandler(ctx context.Context, client client.RegistryClient) http.Handler

NewTokenHandler returns a handler that implements the docker token protocol

func RegisterMetricHandler

func RegisterMetricHandler(app *handlers.App)

func RegisterSignatureHandler added in v1.5.1

func RegisterSignatureHandler(app *handlers.App, isImageClient client.ImageStreamImagesNamespacer)

RegisterSignatureHandler registers the Docker image signature extension to Docker registry.

func TokenRealm added in v1.3.0

func TokenRealm(options map[string]interface{}) (*url.URL, error)

TokenRealm returns the template URL to use as the token realm redirect. An empty scheme/host in the returned URL means to match the scheme/host on incoming requests.

func WithUserInfoLogger added in v1.5.1

func WithUserInfoLogger(ctx context.Context, username, userid string) context.Context

WithUserInfoLogger creates a new context with provided user infomation.

Types

type AccessController

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

func (*AccessController) Authorized

func (ac *AccessController) Authorized(ctx context.Context, accessRecords ...registryauth.Access) (context.Context, error)

Authorized handles checking whether the given request is authorized for actions on resources allowed by openshift. Sources of access records:

origin/pkg/cmd/dockerregistry/dockerregistry.go#Execute
docker/distribution/registry/handlers/app.go#appendAccessRecords

type App

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

App is a global registry application object. Shared resources can be placed on this object that will be accessible from all requests.

type BlobGetterService added in v1.5.1

BlobGetterService combines the operations to access and read blobs.

func NewBlobGetterService added in v1.5.1

func NewBlobGetterService(
	namespace, name string,
	cacheTTL time.Duration,
	imageStreamGetter ImageStreamGetter,
	isSecretsNamespacer client.ImageStreamSecretsNamespacer,
	cachedLayers digestToRepositoryCache,
) BlobGetterService

NewBlobGetterService returns a getter for remote blobs. Its cache will be shared among different middleware wrappers, which is a must at least for stat calls made on manifest's dependencies during its verification.

type ByGeneration added in v1.3.0

type ByGeneration []*imageapiv1.TagEvent

ByGeneration allows for sorting tag events from latest to oldest.

func (ByGeneration) Len added in v1.3.0

func (b ByGeneration) Len() int

func (ByGeneration) Less added in v1.3.0

func (b ByGeneration) Less(i, j int) bool

func (ByGeneration) Swap added in v1.3.0

func (b ByGeneration) Swap(i, j int)

type ErrManifestBlobBadSize

type ErrManifestBlobBadSize struct {
	Digest         digest.Digest
	ActualSize     int64
	SizeInManifest int64
}

ErrManifestBlobBadSize is returned when the blob size in a manifest does not match the actual size. The docker/distribution does not check this and therefore does not provide an error for this.

func (ErrManifestBlobBadSize) Error

func (err ErrManifestBlobBadSize) Error() string

type ImageStreamGetter added in v1.5.1

type ImageStreamGetter func() (*imageapiv1.ImageStream, error)

type ManifestHandler added in v1.3.3

type ManifestHandler interface {
	// Config returns a blob with image configuration associated with the manifest. This applies only to
	// manifet schema 2.
	Config(ctx context.Context) ([]byte, error)

	// Digest returns manifest's digest.
	Digest() (manifestDigest digest.Digest, err error)

	// Manifest returns a deserialized manifest object.
	Manifest() distribution.Manifest

	// Layers returns image layers and a value for the dockerLayersOrder annotation.
	Layers(ctx context.Context) (order string, layers []imageapiv1.ImageLayer, err error)

	// Payload returns manifest's media type, complete payload with signatures and canonical payload without
	// signatures or an error if the information could not be fetched.
	Payload() (mediaType string, payload []byte, canonical []byte, err error)

	// Verify returns an error if the contained manifest is not valid or has missing dependencies.
	Verify(ctx context.Context, skipDependencyVerification bool) error
}

A ManifestHandler defines a common set of operations on all versions of manifest schema.

func NewManifestHandler added in v1.3.3

func NewManifestHandler(repo *repository, manifest distribution.Manifest) (ManifestHandler, error)

NewManifestHandler creates a manifest handler for the given manifest.

func NewManifestHandlerFromImage added in v1.3.3

func NewManifestHandlerFromImage(repo *repository, image *imageapiv1.Image) (ManifestHandler, error)

NewManifestHandlerFromImage creates a new manifest handler for a manifest stored in the given image.

Directories

Path Synopsis
Package api describes routes and urls that extends the Registry JSON HTTP API.
Package api describes routes and urls that extends the Registry JSON HTTP API.
Package audit log the beginning and end of each API request to different logger.
Package audit log the beginning and end of each API request to different logger.
Package client provides functions to make requests to external APIs.
Package client provides functions to make requests to external APIs.
Package metrics provides functions to collect runtime registry statistics and expose the registered metrics via HTTP.
Package metrics provides functions to collect runtime registry statistics and expose the registered metrics via HTTP.

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