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manager.go
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manager.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package oci
import (
"context"
"crypto/tls"
"errors"
"fmt"
"net/http"
"slices"
"strings"
"sync"
"github.com/gobwas/glob"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/crane"
"github.com/google/go-containerregistry/pkg/name"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/remote"
"github.com/google/go-containerregistry/pkg/v1/remote/transport"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"kraftkit.sh/config"
"kraftkit.sh/internal/set"
"kraftkit.sh/internal/version"
"kraftkit.sh/log"
"kraftkit.sh/oci/cache"
"kraftkit.sh/oci/handler"
"kraftkit.sh/oci/simpleauth"
ociutils "kraftkit.sh/oci/utils"
"kraftkit.sh/pack"
"kraftkit.sh/packmanager"
"kraftkit.sh/unikraft"
"kraftkit.sh/unikraft/component"
"kraftkit.sh/unikraft/target"
)
type ociManager struct {
registries []string
auths map[string]config.AuthConfig
handle func(ctx context.Context) (context.Context, handler.Handler, error)
}
const OCIFormat pack.PackageFormat = "oci"
// NewOCIManager instantiates a new package manager based on OCI archives.
func NewOCIManager(ctx context.Context, opts ...any) (packmanager.PackageManager, error) {
manager := ociManager{}
for _, mopt := range opts {
opt, ok := mopt.(OCIManagerOption)
if !ok {
return nil, fmt.Errorf("cannot cast OCI Manager option")
}
if err := opt(ctx, &manager); err != nil {
return nil, err
}
}
if manager.handle == nil {
return nil, fmt.Errorf("cannot instantiate OCI Manager without handler")
}
return &manager, nil
}
// Update implements packmanager.PackageManager
func (manager *ociManager) Update(ctx context.Context) error {
packs, err := manager.update(ctx, nil, nil)
if err != nil {
return err
}
for _, pack := range packs {
pack := pack.(*ociPackage) // Safe since we're in the oci package
log.G(ctx).Infof("saving %s", pack.String())
if _, err := pack.index.Save(ctx, pack.imageRef(), nil); err != nil {
return fmt.Errorf("error saving %s: %w", pack.String(), err)
}
}
return nil
}
func (manager *ociManager) update(ctx context.Context, auths map[string]config.AuthConfig, query *packmanager.Query) (map[string]pack.Package, error) {
ctx, handle, err := manager.handle(ctx)
if err != nil {
return nil, err
}
if auths == nil {
auths, err = defaultAuths(ctx)
if err != nil {
return nil, fmt.Errorf("accessing credentials: %w", err)
}
}
packs := make(map[string]pack.Package)
for _, domain := range manager.registries {
log.G(ctx).
WithField("registry", domain).
Trace("querying")
nopts := []name.Option{}
authConfig := &authn.AuthConfig{}
transport := http.DefaultTransport.(*http.Transport).Clone()
// Annoyingly convert between regtypes and authn.
if auth, ok := auths[domain]; ok {
authConfig.Username = auth.User
authConfig.Password = auth.Token
if !auth.VerifySSL {
transport.TLSClientConfig = &tls.Config{
InsecureSkipVerify: true,
}
nopts = append(nopts, name.Insecure)
}
}
regName, err := name.NewRegistry(domain, nopts...)
if err != nil {
log.G(ctx).
WithField("registry", domain).
Debugf("could not parse registry: %v", err)
continue
}
catalog, err := remote.Catalog(ctx, regName,
remote.WithContext(ctx),
remote.WithAuth(&simpleauth.SimpleAuthenticator{
Auth: authConfig,
}),
remote.WithTransport(transport),
)
if err != nil {
log.G(ctx).
WithField("registry", domain).
Debugf("could not query catalog: %v", err)
continue
}
var wg sync.WaitGroup
wg.Add(len(catalog))
var mu sync.RWMutex
for _, fullref := range catalog {
go func(fullref string) {
defer wg.Done()
ref, err := name.ParseReference(fullref,
name.WithDefaultRegistry(domain),
name.WithDefaultTag(DefaultTag),
)
if err != nil {
log.G(ctx).
WithField("ref", fullref).
Tracef("skipping index: could not parse reference: %s", err.Error())
return
}
index, err := cache.RemoteIndex(ref,
remote.WithContext(ctx),
remote.WithAuth(&simpleauth.SimpleAuthenticator{
Auth: authConfig,
}),
remote.WithTransport(transport),
)
if err != nil {
log.G(ctx).
WithField("ref", fullref).
Tracef("skipping index: could not retrieve image: %s", err.Error())
return
}
v1IndexManifest, err := index.IndexManifest()
if err != nil {
log.G(ctx).
WithField("ref", fullref).
Tracef("could not access the index's manifest object: %s", err.Error())
return
}
v1ManifestPackages := processV1IndexManifests(ctx,
handle,
fullref,
query,
FromGoogleV1DescriptorToOCISpec(v1IndexManifest.Manifests...),
)
mu.Lock()
for checksum, pack := range v1ManifestPackages {
var title []string
for _, column := range pack.Columns() {
if len(column.Value) > 12 {
continue
}
title = append(title, column.Value)
}
log.G(ctx).
Tracef("found %s (%s)", pack.String(), strings.Join(title, ", "))
packs[checksum] = pack
}
mu.Unlock()
}(fullref)
}
wg.Wait()
}
return packs, nil
}
// Pack implements packmanager.PackageManager
func (manager *ociManager) Pack(ctx context.Context, entity component.Component, opts ...packmanager.PackOption) ([]pack.Package, error) {
targ, ok := entity.(target.Target)
if !ok {
return nil, fmt.Errorf("entity is not Unikraft target")
}
pkg, err := NewPackageFromTarget(ctx, targ, opts...)
if err != nil {
return nil, err
}
return []pack.Package{pkg}, nil
}
// Unpack implements packmanager.PackageManager
func (manager *ociManager) Unpack(ctx context.Context, entity pack.Package, opts ...packmanager.UnpackOption) ([]component.Component, error) {
return nil, fmt.Errorf("not implemented: oci.manager.Unpack")
}
// processV1IndexManifests is an internal utility method which is able to
// iterate over the supplied slice of ocispec.Descriptors which represent a
// Manifest from an Index. Based on the provided criterium from the query,
// identify the Descriptor that is compatible and instantiate a pack.Package
// structure from it.
func processV1IndexManifests(ctx context.Context, handle handler.Handler, fullref string, query *packmanager.Query, manifests []ocispec.Descriptor) map[string]pack.Package {
packs := make(map[string]pack.Package)
var wg sync.WaitGroup
wg.Add(len(manifests))
var mu sync.RWMutex
for _, descriptor := range manifests {
go func(descriptor ocispec.Descriptor) {
defer wg.Done()
if ok, err := IsOCIDescriptorKraftKitCompatible(&descriptor); !ok {
log.G(ctx).
WithField("digest", descriptor.Digest.String()).
WithField("ref", fullref).
Tracef("incompatible index structure: %s", err.Error())
return
}
if query != nil && query.Platform() != "" && query.Platform() != descriptor.Platform.OS {
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
WithField("want", query.Platform()).
WithField("got", descriptor.Platform.OS).
Trace("skipping manifest: platform does not match query")
return
}
if query != nil && query.Architecture() != "" && query.Architecture() != descriptor.Platform.Architecture {
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
WithField("want", query.Architecture()).
WithField("got", descriptor.Platform.Architecture).
Trace("skipping manifest: architecture does not match query")
return
}
if query != nil && len(query.KConfig()) > 0 {
// If the list of requested features is greater than the list of
// available features, there will be no way for the two to match. We
// are searching for a subset of query.KConfig() from
// m.Platform.OSFeatures to match.
if len(query.KConfig()) > len(descriptor.Platform.OSFeatures) {
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
Trace("skipping descriptor: query contains more features than available")
return
}
available := set.NewStringSet(descriptor.Platform.OSFeatures...)
// Iterate through the query's requested set of features and skip only
// if the descriptor does not contain the requested KConfig feature.
for _, a := range query.KConfig() {
if !available.Contains(a) {
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
WithField("feature", a).
Trace("skipping manifest: missing feature")
return
}
}
}
var auths map[string]config.AuthConfig
if query != nil {
auths = query.Auths()
}
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
Trace("found")
// If we have made it this far, the query has been successfully
// satisfied by this particular manifest and we can generate a package
// from it.
pack, err := NewPackageFromOCIManifestDigest(ctx,
handle,
fullref,
auths,
descriptor.Digest,
)
if err != nil {
log.G(ctx).
WithField("ref", fullref).
WithField("digest", descriptor.Digest.String()).
Tracef("skipping manifest: could not instantiate package from manifest digest: %s", err.Error())
return
}
checksum, err := ociutils.PlatformChecksum(pack.String(), descriptor.Platform)
if err != nil {
log.G(ctx).
WithField("ref", fullref).
Debugf("could not calculate platform digest for '%s': %s", descriptor.Digest.String(), err)
return
}
mu.Lock()
packs[checksum] = pack
mu.Unlock()
}(descriptor)
}
wg.Wait()
return packs
}
// Catalog implements packmanager.PackageManager
func (manager *ociManager) Catalog(ctx context.Context, qopts ...packmanager.QueryOption) ([]pack.Package, error) {
query := packmanager.NewQuery(qopts...)
// Do not perform a search if a query for a specific type is requested and it
// does not include the application-type.
if len(query.Types()) > 0 && !slices.Contains(query.Types(), unikraft.ComponentTypeApp) {
return nil, nil
}
var qglob glob.Glob
var err error
packs := make(map[string]pack.Package)
qname := query.Name()
total := 0
if strings.ContainsRune(qname, '*') {
qglob, err = glob.Compile(qname)
if err != nil {
return nil, fmt.Errorf("query name is not globable: %w", err)
}
} else if !strings.ContainsRune(qname, ':') && len(query.Version()) > 0 {
qname = fmt.Sprintf("%s:%s", qname, query.Version())
}
qversion := query.Version()
// Adjust for the version being suffixed in a prototypical OCI reference
// format.
ref, refErr := name.ParseReference(qname,
name.WithDefaultRegistry(""),
name.WithDefaultTag(DefaultTag),
)
if refErr == nil {
qname = ref.Context().Name()
if ref.Identifier() != "latest" && qversion != "" && ref.Identifier() != qversion {
return nil, fmt.Errorf("cannot determine which version as name contains version and version query paremeter set")
} else if qversion == "" {
qversion = ref.Identifier()
}
}
unsetRegistry := false
// No default registry found, re-parse with
if ref != nil && ref.Context().RegistryStr() == "" {
unsetRegistry = true
ref, refErr = name.ParseReference(fmt.Sprintf("%s:%s", qname, qversion),
name.WithDefaultRegistry(DefaultRegistry),
name.WithDefaultTag(DefaultTag),
)
}
log.G(ctx).
WithFields(query.Fields()).
Debug("querying catalog")
ctx, handle, err := manager.handle(ctx)
if err != nil {
return nil, err
}
var auths map[string]config.AuthConfig
if query.Auths() == nil {
auths, err = defaultAuths(ctx)
if err != nil {
return nil, fmt.Errorf("could not access credentials: %w", err)
}
} else {
auths = query.Auths()
}
// If a direct reference can be made, attempt to generate a package from it.
if query.Remote() && refErr == nil && !unsetRegistry {
authConfig := &authn.AuthConfig{}
ropts := []remote.Option{
remote.WithContext(ctx),
}
// Annoyingly convert between regtypes and authn.
if auth, ok := auths[ref.Context().RegistryStr()]; ok {
authConfig.Username = auth.User
authConfig.Password = auth.Token
if !auth.VerifySSL {
rt := http.DefaultTransport.(*http.Transport).Clone()
rt.TLSClientConfig = &tls.Config{
InsecureSkipVerify: true,
}
ropts = append(ropts,
remote.WithTransport(rt),
)
}
ropts = append(ropts,
remote.WithAuth(&simpleauth.SimpleAuthenticator{
Auth: authConfig,
}),
)
}
log.G(ctx).
WithField("ref", ref.Name()).
Trace("getting remote index")
v1ImageIndex, err := cache.RemoteIndex(ref, ropts...)
if err != nil {
log.G(ctx).
Debugf("could not get index: %v", err)
goto resolveLocalIndex
}
v1IndexManifest, err := v1ImageIndex.IndexManifest()
if err != nil {
log.G(ctx).
WithField("ref", ref).
Tracef("could not access the index's manifest object: %s", err.Error())
goto resolveLocalIndex
}
for checksum, pack := range processV1IndexManifests(ctx,
handle,
ref.String(),
query,
FromGoogleV1DescriptorToOCISpec(v1IndexManifest.Manifests...),
) {
packs[checksum] = pack
total++
}
// No need to search remote indexes by registry if the registry has been
// included as part of the ref.
goto searchLocalIndexes
}
if query.Remote() {
more, err := manager.update(ctx, auths, query)
if err != nil {
log.G(ctx).
Debugf("could not update: %v", err)
} else {
for checksum, pack := range more {
total++
ref, err := name.ParseReference(fmt.Sprintf("%s:%s", pack.Name(), pack.Version()))
if err != nil {
log.G(ctx).
WithField("ref", pack.Name()).
Tracef("skipping index: could not parse reference: %s", err.Error())
continue
}
fullref := fmt.Sprintf("%s:%s", ref.Context().RepositoryStr(), ref.Identifier())
// If the query did specify a registry include this in check otherwise
// search for indexes without this as prefix.
if !unsetRegistry {
fullref = fmt.Sprintf("%s/%s", ref.Context().RegistryStr(), fullref)
}
if qglob != nil && !qglob.Match(fullref) {
log.G(ctx).
WithField("want", qname).
WithField("got", fullref).
Trace("skipping manifest: glob does not match")
continue
} else if qglob == nil {
if len(qversion) > 0 && len(qname) > 0 {
if fullref != fmt.Sprintf("%s:%s", qname, qversion) {
log.G(ctx).
WithField("want", fmt.Sprintf("%s:%s", qname, qversion)).
WithField("got", fullref).
Trace("skipping manifest: name does not match")
continue
}
} else if len(qname) > 0 && fullref != qname {
log.G(ctx).
WithField("want", qname).
WithField("got", fullref).
Trace("skipping manifest: name does not match")
continue
}
}
packs[checksum] = pack
}
}
}
resolveLocalIndex:
// If the query is local and the reference is a fully qualified OCI reference,
// attempt to resolve the exact index and generate packages from it.
if query.Local() && len(qversion) > 0 && len(qname) > 0 {
oref := fmt.Sprintf("%s:%s", qname, qversion)
index, err := handle.ResolveIndex(ctx, oref)
if err != nil {
log.G(ctx).
WithField("ref", oref).
Trace("could not resolve exact index")
goto searchLocalIndexes
}
for checksum, pack := range processV1IndexManifests(ctx,
handle,
oref,
query,
index.Manifests,
) {
packs[checksum] = pack
total++
}
// If the register was set, then an exact local index lookup was expected so
// we can return here.
if !unsetRegistry {
goto returnPacks
}
}
searchLocalIndexes:
if query.Local() {
// Access local indexes that are available on the host
indexes, err := handle.ListIndexes(ctx)
if err != nil {
return nil, err
}
for oref, index := range indexes {
ref, err := name.ParseReference(oref,
name.WithDefaultRegistry(""),
name.WithDefaultTag(DefaultTag),
)
if err != nil {
log.G(ctx).
WithField("ref", oref).
Tracef("skipping index: invalid reference format: %s", err.Error())
total += len(index.Manifests)
continue
}
fullref := fmt.Sprintf("%s:%s", ref.Context().RepositoryStr(), ref.Identifier())
// If the query did specify a registry include this in check otherwise
// search for indexes without this as prefix.
if !unsetRegistry {
fullref = fmt.Sprintf("%s/%s", ref.Context().RegistryStr(), fullref)
}
if ok, err := IsOCIIndexKraftKitCompatible(index); !ok {
log.G(ctx).
WithField("ref", fullref).
Tracef("skipping index: incompatible index structure: %s", err.Error())
total += len(index.Manifests)
continue
}
if qglob != nil && !qglob.Match(fullref) {
log.G(ctx).
WithField("want", qname).
WithField("got", fullref).
Trace("skipping index: glob does not match")
total += len(index.Manifests)
continue
} else if qglob == nil {
if len(qversion) > 0 && len(qname) > 0 {
if fullref != fmt.Sprintf("%s:%s", qname, qversion) {
log.G(ctx).
WithField("want", fmt.Sprintf("%s:%s", qname, qversion)).
WithField("got", fullref).
Trace("skipping index: name does not match")
total += len(index.Manifests)
continue
}
} else if len(qname) > 0 && fullref != qname {
log.G(ctx).
WithField("want", qname).
WithField("got", fullref).
Trace("skipping index: name does not match")
total += len(index.Manifests)
continue
}
}
for checksum, pack := range processV1IndexManifests(ctx,
handle,
oref,
query,
index.Manifests,
) {
packs[checksum] = pack
total++
}
}
}
returnPacks:
var ret []pack.Package
for _, pack := range packs {
var title []string
for _, column := range pack.Columns() {
if len(column.Value) > 12 {
continue
}
title = append(title, column.Value)
}
log.G(ctx).
Infof("found %s (%s)", pack.String(), strings.Join(title, ", "))
ret = append(ret, pack)
}
log.G(ctx).Debugf("found %d/%d matching packages in oci catalog", len(packs), total)
return ret, nil
}
// SetSources implements packmanager.PackageManager
func (manager *ociManager) SetSources(_ context.Context, sources ...string) error {
manager.registries = sources
return nil
}
// AddSource implements packmanager.PackageManager
func (manager *ociManager) AddSource(ctx context.Context, source string) error {
if manager.registries == nil {
manager.registries = make([]string, 0)
}
manager.registries = append(manager.registries, source)
return nil
}
// Delete implements packmanager.PackageManager.
func (manager *ociManager) Delete(ctx context.Context, qopts ...packmanager.QueryOption) error {
packs, err := manager.Catalog(ctx, qopts...)
if err != nil {
return err
}
var errs []error
for _, pack := range packs {
if err := pack.Delete(ctx); err != nil {
errs = append(errs, err)
}
}
return errors.Join(errs...)
}
// RemoveSource implements packmanager.PackageManager
func (manager *ociManager) RemoveSource(ctx context.Context, source string) error {
for i, needle := range manager.registries {
if needle == source {
ret := make([]string, 0)
ret = append(ret, manager.registries[:i]...)
manager.registries = append(ret, manager.registries[i+1:]...)
break
}
}
return nil
}
// IsCompatible implements packmanager.PackageManager
func (manager *ociManager) IsCompatible(ctx context.Context, source string, qopts ...packmanager.QueryOption) (packmanager.PackageManager, bool, error) {
ctx, handle, err := manager.handle(ctx)
if err != nil {
return nil, false, err
}
isFullyQualifiedNameReference := func(source string) bool {
_, err := name.ParseReference(source)
if err != nil && errors.Is(err, &name.ErrBadName{}) {
return false
}
return true
}
query := packmanager.NewQuery(qopts...)
// Check if the provided source is a fully qualified OCI reference
isLocalImage := func(source string) bool {
// First try without known registries
if _, err := handle.ResolveIndex(ctx, source); err == nil {
return true
}
// Now try with known registries
for _, registry := range manager.registries {
ref, err := name.ParseReference(source,
name.WithDefaultRegistry(registry),
name.WithDefaultTag(DefaultTag),
)
if err != nil {
continue
}
if _, err := handle.ResolveIndex(ctx, ref.Context().String()); err == nil {
return true
}
}
return false
}
// Check if the provided source an OCI Distrubtion Spec capable registry
isRegistry := func(source string) bool {
log.G(ctx).
WithField("source", source).
Tracef("checking if source is registry")
regName, err := name.NewRegistry(source)
if err != nil {
return false
}
if _, err := transport.Ping(ctx, regName, http.DefaultTransport.(*http.Transport).Clone()); err == nil {
return true
}
return false
}
// Check if the provided source is OCI registry
isRemoteImage := func(source string) bool {
log.G(ctx).
WithField("source", source).
Tracef("checking if source is remote image")
ref, err := name.ParseReference(source,
name.WithDefaultRegistry(DefaultRegistry),
name.WithDefaultTag(DefaultTag),
)
if err != nil {
return false
}
source = fmt.Sprintf("%s:%s", ref.Context().String(), ref.Identifier())
// log.G(ctx).WithField("source", source).Debug("checking if source is registry")
opts := []crane.Option{
crane.WithContext(ctx),
crane.WithUserAgent(version.UserAgent()),
crane.WithPlatform(&v1.Platform{
OS: query.Platform(),
OSFeatures: query.KConfig(),
Architecture: query.Architecture(),
}),
}
if auth, ok := config.G[config.KraftKit](ctx).Auth[ref.Context().Registry.RegistryStr()]; ok {
// We split up the options for authenticating and the option for
// "verifying ssl" such that a user can simply disable secure connection
// to a registry if desired.
if auth.User != "" && auth.Token != "" {
log.G(ctx).
WithField("registry", source).
Debug("authenticating")
opts = append(opts,
crane.WithAuth(authn.FromConfig(authn.AuthConfig{
Username: auth.User,
Password: auth.Token,
})),
)
}
if !auth.VerifySSL {
rt := http.DefaultTransport.(*http.Transport).Clone()
rt.TLSClientConfig = &tls.Config{
InsecureSkipVerify: true,
}
opts = append(opts,
crane.Insecure,
crane.WithTransport(rt),
)
}
}
desc, err := crane.Head(source, opts...)
if err == nil && desc != nil {
return true
}
log.G(ctx).WithField("source", source).Trace(err)
return false
}
checks := []func(string) bool{
isLocalImage,
isFullyQualifiedNameReference,
}
if query.Remote() {
checks = append(checks,
isRegistry,
isRemoteImage,
)
}
for _, check := range checks {
if check(source) {
return manager, true, nil
}
}
return nil, false, nil
}
// From implements packmanager.PackageManager
func (manager *ociManager) From(pack.PackageFormat) (packmanager.PackageManager, error) {
return nil, fmt.Errorf("not possible: oci.manager.From")
}
// Format implements packmanager.PackageManager
func (manager *ociManager) Format() pack.PackageFormat {
return OCIFormat
}