/
api.go
375 lines (302 loc) · 10.2 KB
/
api.go
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package docker_registry
import (
"context"
"crypto/tls"
"fmt"
"math/rand"
"net/http"
"os"
"strings"
"time"
dockerReference "github.com/docker/distribution/reference"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/name"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/mutate"
"github.com/google/go-containerregistry/pkg/v1/remote"
"github.com/werf/logboek"
"github.com/werf/werf/pkg/docker_registry/container_registry_extensions"
"github.com/werf/werf/pkg/image"
)
type api struct {
InsecureRegistry bool
SkipTlsVerifyRegistry bool
}
type apiOptions struct {
InsecureRegistry bool
SkipTlsVerifyRegistry bool
}
func newAPI(options apiOptions) *api {
return &api{
InsecureRegistry: options.InsecureRegistry,
SkipTlsVerifyRegistry: options.SkipTlsVerifyRegistry,
}
}
func (api *api) Tags(ctx context.Context, reference string) ([]string, error) {
return api.tags(ctx, reference)
}
func (api *api) tags(_ context.Context, reference string, extraListOptions ...remote.Option) ([]string, error) {
tags, err := api.list(reference, extraListOptions...)
if err != nil {
if IsNameUnknownError(err) {
return []string{}, nil
}
return nil, err
}
return tags, nil
}
func (api *api) tagImage(reference, tag string) error {
ref, err := name.ParseReference(reference, api.parseReferenceOptions()...)
if err != nil {
return fmt.Errorf("parsing reference %q: %v", reference, err)
}
desc, err := remote.Get(ref, api.defaultRemoteOptions()...)
if err != nil {
return fmt.Errorf("getting reference %q: %v", reference, err)
}
dst := ref.Context().Tag(tag)
return remote.Tag(dst, desc, api.defaultRemoteOptions()...)
}
func (api *api) IsRepoImageExists(ctx context.Context, reference string) (bool, error) {
if imgInfo, err := api.TryGetRepoImage(ctx, reference); err != nil {
return false, err
} else {
return imgInfo != nil, nil
}
}
func (api *api) TryGetRepoImage(ctx context.Context, reference string) (*image.Info, error) {
if imgInfo, err := api.GetRepoImage(ctx, reference); err != nil {
if IsBlobUnknownError(err) || IsManifestUnknownError(err) || IsNameUnknownError(err) || IsHarbor404Error(err) || IsQuayTagExpiredErr(err) {
// TODO: 1. auto reject images with manifest-unknown or blob-unknown errors
// TODO: 2. why TryGetRepoImage for rejected image records gives manifest-unknown errors?
// TODO: 3. make sure werf never ever creates rejected image records for name-unknown errors.
// TODO: 4. werf-cleanup should remove broken images
if os.Getenv("WERF_DOCKER_REGISTRY_DEBUG") == "1" {
logboek.Context(ctx).Error().LogF("WARNING: Got an error when inspecting repo image %q: %s\n", reference, err)
}
return nil, nil
}
return imgInfo, err
} else {
return imgInfo, nil
}
}
func (api *api) GetRepoImage(_ context.Context, reference string) (*image.Info, error) {
imageInfo, _, err := api.image(reference)
if err != nil {
return nil, err
}
digest, err := imageInfo.Digest()
if err != nil {
return nil, err
}
manifest, err := imageInfo.Manifest()
if err != nil {
return nil, err
}
configFile, err := imageInfo.ConfigFile()
if err != nil {
return nil, err
}
var totalSize int64
if layers, err := imageInfo.Layers(); err != nil {
return nil, err
} else {
for _, l := range layers {
if lSize, err := l.Size(); err != nil {
return nil, err
} else {
totalSize += lSize
}
}
}
referenceParts, err := api.ParseReferenceParts(reference)
if err != nil {
return nil, fmt.Errorf("unable to parse reference %q: %s", reference, err)
}
repoImage := &image.Info{
Name: reference,
Repository: strings.Join([]string{referenceParts.registry, referenceParts.repository}, "/"),
ID: manifest.Config.Digest.String(),
Tag: referenceParts.tag,
RepoDigest: digest.String(),
ParentID: configFile.Config.Image,
Labels: configFile.Config.Labels,
Size: totalSize,
}
repoImage.SetCreatedAtUnix(configFile.Created.Unix())
return repoImage, nil
}
func (api *api) list(reference string, extraListOptions ...remote.Option) ([]string, error) {
repo, err := name.NewRepository(reference, api.newRepositoryOptions()...)
if err != nil {
return nil, fmt.Errorf("parsing repo %q: %v", reference, err)
}
listOptions := append(
api.defaultRemoteOptions(),
extraListOptions...,
)
tags, err := remote.List(repo, listOptions...)
if err != nil {
return nil, fmt.Errorf("reading tags for %q: %v", repo, err)
}
return tags, nil
}
func (api *api) deleteImageByReference(reference string) error {
r, err := name.ParseReference(reference, api.parseReferenceOptions()...)
if err != nil {
return fmt.Errorf("parsing reference %q: %v", reference, err)
}
if err := remote.Delete(r, api.defaultRemoteOptions()...); err != nil {
return fmt.Errorf("deleting image %q: %v", r, err)
}
return nil
}
func (api *api) MutateAndPushImage(_ context.Context, sourceReference, destinationReference string, mutateConfigFunc func(cfg v1.Config) (v1.Config, error)) error {
img, _, err := api.image(sourceReference)
if err != nil {
return err
}
cfgFile, err := img.ConfigFile()
if err != nil {
return err
}
newConf, err := mutateConfigFunc(cfgFile.Config)
if err != nil {
return err
}
newImg, err := mutate.Config(img, newConf)
if err != nil {
return err
}
ref, err := name.ParseReference(destinationReference, api.parseReferenceOptions()...)
if err != nil {
return fmt.Errorf("parsing reference %q: %v", destinationReference, err)
}
if err = remote.Write(ref, newImg, remote.WithAuthFromKeychain(authn.DefaultKeychain)); err != nil {
return err
}
return nil
}
func (api *api) PushImage(ctx context.Context, reference string, opts *PushImageOptions) error {
retriesLimit := 5
attemptLoop:
for attempt := 1; attempt <= retriesLimit; attempt++ {
if err := api.pushImage(ctx, reference, opts); err != nil {
for _, substr := range []string{
"REDACTED: UNKNOWN",
"http2: server sent GOAWAY and closed the connection",
"http2: Transport received Server's graceful shutdown GOAWAY",
} {
if strings.Contains(err.Error(), substr) {
seconds := rand.Intn(5) + 1
msg := fmt.Sprintf("Retrying publishing in %d seconds (%d/%d) ...\n", seconds, attempt, retriesLimit)
logboek.Context(ctx).Warn().LogLn(msg)
time.Sleep(time.Duration(seconds) * time.Second)
continue attemptLoop
}
}
return err
}
return nil
}
return nil
}
func (api *api) pushImage(_ context.Context, reference string, opts *PushImageOptions) error {
ref, err := name.ParseReference(reference, api.parseReferenceOptions()...)
if err != nil {
return fmt.Errorf("parsing reference %q: %v", reference, err)
}
labels := map[string]string{}
if opts != nil {
labels = opts.Labels
}
img := container_registry_extensions.NewManifestOnlyImage(labels)
oldDefaultTransport := http.DefaultTransport
http.DefaultTransport = api.getHttpTransport()
err = remote.Write(ref, img, remote.WithAuthFromKeychain(authn.DefaultKeychain))
http.DefaultTransport = oldDefaultTransport
if err != nil {
return fmt.Errorf("write to the remote %s have failed: %s", ref.String(), err)
}
return nil
}
func (api *api) image(reference string) (v1.Image, name.Reference, error) {
ref, err := name.ParseReference(reference, api.parseReferenceOptions()...)
if err != nil {
return nil, nil, fmt.Errorf("parsing reference %q: %v", reference, err)
}
// FIXME: Hack for the go-containerregistry library,
// FIXME: that uses default transport without options to change transport to custom.
// FIXME: Needed for the insecure https registry to work.
oldDefaultTransport := http.DefaultTransport
http.DefaultTransport = api.getHttpTransport()
img, err := remote.Image(ref, remote.WithAuthFromKeychain(authn.DefaultKeychain))
http.DefaultTransport = oldDefaultTransport
if err != nil {
return nil, nil, fmt.Errorf("reading image %q: %v", ref, err)
}
return img, ref, nil
}
func (api *api) newRepositoryOptions() []name.Option {
return api.parseReferenceOptions()
}
func (api *api) parseReferenceOptions() []name.Option {
var options []name.Option
options = append(options, name.WeakValidation)
if api.InsecureRegistry {
options = append(options, name.Insecure)
}
return options
}
func (api *api) defaultRemoteOptions() []remote.Option {
return []remote.Option{remote.WithAuthFromKeychain(authn.DefaultKeychain), remote.WithTransport(api.getHttpTransport())}
}
func (api *api) getHttpTransport() (transport http.RoundTripper) {
transport = http.DefaultTransport
if api.SkipTlsVerifyRegistry {
defaultTransport := http.DefaultTransport.(*http.Transport)
newTransport := &http.Transport{
Proxy: defaultTransport.Proxy,
DialContext: defaultTransport.DialContext,
MaxIdleConns: defaultTransport.MaxIdleConns,
IdleConnTimeout: defaultTransport.IdleConnTimeout,
TLSHandshakeTimeout: defaultTransport.TLSHandshakeTimeout,
ExpectContinueTimeout: defaultTransport.ExpectContinueTimeout,
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
TLSNextProto: make(map[string]func(authority string, c *tls.Conn) http.RoundTripper),
}
transport = newTransport
}
return
}
type referenceParts struct {
registry string
repository string
tag string
digest string
}
func (api *api) ParseReferenceParts(reference string) (referenceParts, error) {
// validate reference
parsedReference, err := name.ParseReference(reference, api.parseReferenceOptions()...)
if err != nil {
return referenceParts{}, fmt.Errorf("unable to parse reference %q: %s", reference, err)
}
res := dockerReference.ReferenceRegexp.FindStringSubmatch(reference)
// res[0] full match
// res[1] repository
// res[2] tag
// res[3] digest
if len(res) != 4 {
panic(fmt.Sprintf("unexpected regexp find submatch result %v (%d)", res, len(res)))
}
referenceParts := referenceParts{}
referenceParts.registry = parsedReference.Context().RegistryStr()
referenceParts.repository = parsedReference.Context().RepositoryStr()
referenceParts.tag = res[2]
if referenceParts.tag == "" {
referenceParts.tag = name.DefaultTag
}
referenceParts.digest = res[3]
return referenceParts, nil
}