mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
614 lines
14 KiB
Go
614 lines
14 KiB
Go
package buildkit
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import (
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"context"
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"fmt"
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"io"
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"net"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/containerd/containerd/content"
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"github.com/containerd/containerd/platforms"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/backend"
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"github.com/docker/docker/builder"
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"github.com/docker/docker/daemon/config"
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"github.com/docker/docker/daemon/images"
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"github.com/docker/docker/pkg/streamformatter"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/libnetwork"
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controlapi "github.com/moby/buildkit/api/services/control"
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"github.com/moby/buildkit/client"
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"github.com/moby/buildkit/control"
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"github.com/moby/buildkit/identity"
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"github.com/moby/buildkit/session"
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"github.com/moby/buildkit/solver/llbsolver"
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"github.com/moby/buildkit/util/entitlements"
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"github.com/moby/buildkit/util/resolver"
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"github.com/moby/buildkit/util/tracing"
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"github.com/pkg/errors"
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"golang.org/x/sync/errgroup"
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grpcmetadata "google.golang.org/grpc/metadata"
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)
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type errMultipleFilterValues struct{}
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func (errMultipleFilterValues) Error() string { return "filters expect only one value" }
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func (errMultipleFilterValues) InvalidParameter() {}
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type errConflictFilter struct {
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a, b string
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}
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func (e errConflictFilter) Error() string {
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return fmt.Sprintf("conflicting filters: %q and %q", e.a, e.b)
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}
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func (errConflictFilter) InvalidParameter() {}
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var cacheFields = map[string]bool{
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"id": true,
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"parent": true,
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"type": true,
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"description": true,
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"inuse": true,
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"shared": true,
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"private": true,
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// fields from buildkit that are not exposed
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"mutable": false,
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"immutable": false,
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}
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func init() {
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llbsolver.AllowNetworkHostUnstable = true
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}
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// Opt is option struct required for creating the builder
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type Opt struct {
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SessionManager *session.Manager
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Root string
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Dist images.DistributionServices
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NetworkController libnetwork.NetworkController
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DefaultCgroupParent string
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ResolverOpt resolver.ResolveOptionsFunc
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BuilderConfig config.BuilderConfig
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Rootless bool
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}
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// Builder can build using BuildKit backend
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type Builder struct {
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controller *control.Controller
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reqBodyHandler *reqBodyHandler
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mu sync.Mutex
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jobs map[string]*buildJob
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}
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// New creates a new builder
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func New(opt Opt) (*Builder, error) {
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reqHandler := newReqBodyHandler(tracing.DefaultTransport)
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c, err := newController(reqHandler, opt)
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if err != nil {
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return nil, err
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}
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b := &Builder{
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controller: c,
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reqBodyHandler: reqHandler,
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jobs: map[string]*buildJob{},
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}
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return b, nil
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}
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// Cancel cancels a build using ID
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func (b *Builder) Cancel(ctx context.Context, id string) error {
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b.mu.Lock()
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if j, ok := b.jobs[id]; ok && j.cancel != nil {
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j.cancel()
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}
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b.mu.Unlock()
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return nil
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}
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// DiskUsage returns a report about space used by build cache
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func (b *Builder) DiskUsage(ctx context.Context) ([]*types.BuildCache, error) {
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duResp, err := b.controller.DiskUsage(ctx, &controlapi.DiskUsageRequest{})
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if err != nil {
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return nil, err
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}
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var items []*types.BuildCache
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for _, r := range duResp.Record {
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items = append(items, &types.BuildCache{
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ID: r.ID,
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Parent: r.Parent,
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Type: r.RecordType,
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Description: r.Description,
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InUse: r.InUse,
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Shared: r.Shared,
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Size: r.Size_,
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CreatedAt: r.CreatedAt,
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LastUsedAt: r.LastUsedAt,
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UsageCount: int(r.UsageCount),
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})
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}
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return items, nil
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}
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// Prune clears all reclaimable build cache
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func (b *Builder) Prune(ctx context.Context, opts types.BuildCachePruneOptions) (int64, []string, error) {
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ch := make(chan *controlapi.UsageRecord)
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eg, ctx := errgroup.WithContext(ctx)
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validFilters := make(map[string]bool, 1+len(cacheFields))
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validFilters["unused-for"] = true
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validFilters["until"] = true
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validFilters["label"] = true // TODO(tiborvass): handle label
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validFilters["label!"] = true // TODO(tiborvass): handle label!
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for k, v := range cacheFields {
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validFilters[k] = v
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}
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if err := opts.Filters.Validate(validFilters); err != nil {
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return 0, nil, err
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}
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pi, err := toBuildkitPruneInfo(opts)
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if err != nil {
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return 0, nil, err
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}
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eg.Go(func() error {
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defer close(ch)
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return b.controller.Prune(&controlapi.PruneRequest{
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All: pi.All,
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KeepDuration: int64(pi.KeepDuration),
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KeepBytes: pi.KeepBytes,
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Filter: pi.Filter,
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}, &pruneProxy{
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streamProxy: streamProxy{ctx: ctx},
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ch: ch,
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})
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})
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var size int64
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var cacheIDs []string
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eg.Go(func() error {
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for r := range ch {
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size += r.Size_
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cacheIDs = append(cacheIDs, r.ID)
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}
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return nil
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})
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if err := eg.Wait(); err != nil {
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return 0, nil, err
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}
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return size, cacheIDs, nil
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}
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// Build executes a build request
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func (b *Builder) Build(ctx context.Context, opt backend.BuildConfig) (*builder.Result, error) {
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var rc = opt.Source
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if buildID := opt.Options.BuildID; buildID != "" {
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b.mu.Lock()
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upload := false
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if strings.HasPrefix(buildID, "upload-request:") {
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upload = true
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buildID = strings.TrimPrefix(buildID, "upload-request:")
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}
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if _, ok := b.jobs[buildID]; !ok {
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b.jobs[buildID] = newBuildJob()
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}
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j := b.jobs[buildID]
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var cancel func()
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ctx, cancel = context.WithCancel(ctx)
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j.cancel = cancel
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b.mu.Unlock()
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if upload {
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ctx2, cancel := context.WithTimeout(ctx, 5*time.Second)
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defer cancel()
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err := j.SetUpload(ctx2, rc)
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return nil, err
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}
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if remoteContext := opt.Options.RemoteContext; remoteContext == "upload-request" {
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ctx2, cancel := context.WithTimeout(ctx, 5*time.Second)
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defer cancel()
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var err error
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rc, err = j.WaitUpload(ctx2)
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if err != nil {
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return nil, err
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}
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opt.Options.RemoteContext = ""
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}
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defer func() {
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delete(b.jobs, buildID)
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}()
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}
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var out builder.Result
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id := identity.NewID()
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frontendAttrs := map[string]string{}
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if opt.Options.Target != "" {
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frontendAttrs["target"] = opt.Options.Target
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}
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if opt.Options.Dockerfile != "" && opt.Options.Dockerfile != "." {
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frontendAttrs["filename"] = opt.Options.Dockerfile
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}
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if opt.Options.RemoteContext != "" {
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if opt.Options.RemoteContext != "client-session" {
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frontendAttrs["context"] = opt.Options.RemoteContext
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}
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} else {
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url, cancel := b.reqBodyHandler.newRequest(rc)
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defer cancel()
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frontendAttrs["context"] = url
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}
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cacheFrom := append([]string{}, opt.Options.CacheFrom...)
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frontendAttrs["cache-from"] = strings.Join(cacheFrom, ",")
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for k, v := range opt.Options.BuildArgs {
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if v == nil {
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continue
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}
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frontendAttrs["build-arg:"+k] = *v
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}
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for k, v := range opt.Options.Labels {
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frontendAttrs["label:"+k] = v
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}
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if opt.Options.NoCache {
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frontendAttrs["no-cache"] = ""
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}
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if opt.Options.PullParent {
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frontendAttrs["image-resolve-mode"] = "pull"
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} else {
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frontendAttrs["image-resolve-mode"] = "default"
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}
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if opt.Options.Platform != "" {
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// same as in newBuilder in builder/dockerfile.builder.go
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// TODO: remove once opt.Options.Platform is of type specs.Platform
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sp, err := platforms.Parse(opt.Options.Platform)
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if err != nil {
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return nil, err
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}
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if err := system.ValidatePlatform(sp); err != nil {
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return nil, err
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}
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frontendAttrs["platform"] = opt.Options.Platform
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}
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switch opt.Options.NetworkMode {
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case "host", "none":
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frontendAttrs["force-network-mode"] = opt.Options.NetworkMode
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case "", "default":
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default:
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return nil, errors.Errorf("network mode %q not supported by buildkit", opt.Options.NetworkMode)
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}
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extraHosts, err := toBuildkitExtraHosts(opt.Options.ExtraHosts)
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if err != nil {
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return nil, err
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}
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frontendAttrs["add-hosts"] = extraHosts
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exporterName := ""
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exporterAttrs := map[string]string{}
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if len(opt.Options.Outputs) > 1 {
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return nil, errors.Errorf("multiple outputs not supported")
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} else if len(opt.Options.Outputs) == 0 {
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exporterName = "moby"
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} else {
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// cacheonly is a special type for triggering skipping all exporters
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if opt.Options.Outputs[0].Type != "cacheonly" {
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exporterName = opt.Options.Outputs[0].Type
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exporterAttrs = opt.Options.Outputs[0].Attrs
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}
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}
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if exporterName == "moby" {
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if len(opt.Options.Tags) > 0 {
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exporterAttrs["name"] = strings.Join(opt.Options.Tags, ",")
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}
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}
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cache := controlapi.CacheOptions{}
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if inlineCache := opt.Options.BuildArgs["BUILDKIT_INLINE_CACHE"]; inlineCache != nil {
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if b, err := strconv.ParseBool(*inlineCache); err == nil && b {
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cache.Exports = append(cache.Exports, &controlapi.CacheOptionsEntry{
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Type: "inline",
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})
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}
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}
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req := &controlapi.SolveRequest{
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Ref: id,
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Exporter: exporterName,
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ExporterAttrs: exporterAttrs,
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Frontend: "dockerfile.v0",
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FrontendAttrs: frontendAttrs,
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Session: opt.Options.SessionID,
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Cache: cache,
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}
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if opt.Options.NetworkMode == "host" {
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req.Entitlements = append(req.Entitlements, entitlements.EntitlementNetworkHost)
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}
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aux := streamformatter.AuxFormatter{Writer: opt.ProgressWriter.Output}
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eg, ctx := errgroup.WithContext(ctx)
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eg.Go(func() error {
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resp, err := b.controller.Solve(ctx, req)
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if err != nil {
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return err
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}
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if exporterName != "moby" {
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return nil
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}
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id, ok := resp.ExporterResponse["containerimage.digest"]
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if !ok {
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return errors.Errorf("missing image id")
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}
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out.ImageID = id
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return aux.Emit("moby.image.id", types.BuildResult{ID: id})
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})
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ch := make(chan *controlapi.StatusResponse)
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eg.Go(func() error {
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defer close(ch)
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// streamProxy.ctx is not set to ctx because when request is cancelled,
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// only the build request has to be cancelled, not the status request.
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stream := &statusProxy{streamProxy: streamProxy{ctx: context.TODO()}, ch: ch}
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return b.controller.Status(&controlapi.StatusRequest{Ref: id}, stream)
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})
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eg.Go(func() error {
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for sr := range ch {
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dt, err := sr.Marshal()
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if err != nil {
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return err
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}
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if err := aux.Emit("moby.buildkit.trace", dt); err != nil {
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return err
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}
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}
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return nil
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})
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if err := eg.Wait(); err != nil {
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return nil, err
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}
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return &out, nil
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}
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type streamProxy struct {
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ctx context.Context
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}
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func (sp *streamProxy) SetHeader(_ grpcmetadata.MD) error {
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return nil
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}
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func (sp *streamProxy) SendHeader(_ grpcmetadata.MD) error {
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return nil
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}
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func (sp *streamProxy) SetTrailer(_ grpcmetadata.MD) {
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}
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func (sp *streamProxy) Context() context.Context {
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return sp.ctx
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}
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func (sp *streamProxy) RecvMsg(m interface{}) error {
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return io.EOF
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}
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type statusProxy struct {
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streamProxy
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ch chan *controlapi.StatusResponse
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}
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func (sp *statusProxy) Send(resp *controlapi.StatusResponse) error {
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return sp.SendMsg(resp)
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}
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func (sp *statusProxy) SendMsg(m interface{}) error {
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if sr, ok := m.(*controlapi.StatusResponse); ok {
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sp.ch <- sr
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}
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return nil
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}
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type pruneProxy struct {
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streamProxy
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ch chan *controlapi.UsageRecord
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}
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func (sp *pruneProxy) Send(resp *controlapi.UsageRecord) error {
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return sp.SendMsg(resp)
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}
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func (sp *pruneProxy) SendMsg(m interface{}) error {
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if sr, ok := m.(*controlapi.UsageRecord); ok {
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sp.ch <- sr
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}
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return nil
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}
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type contentStoreNoLabels struct {
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content.Store
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}
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func (c *contentStoreNoLabels) Update(ctx context.Context, info content.Info, fieldpaths ...string) (content.Info, error) {
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return content.Info{}, nil
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}
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type wrapRC struct {
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io.ReadCloser
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once sync.Once
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err error
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waitCh chan struct{}
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}
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func (w *wrapRC) Read(b []byte) (int, error) {
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n, err := w.ReadCloser.Read(b)
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if err != nil {
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e := err
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if e == io.EOF {
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e = nil
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}
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w.close(e)
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}
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return n, err
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}
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func (w *wrapRC) Close() error {
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err := w.ReadCloser.Close()
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w.close(err)
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return err
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}
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func (w *wrapRC) close(err error) {
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w.once.Do(func() {
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w.err = err
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close(w.waitCh)
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})
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}
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func (w *wrapRC) wait() error {
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<-w.waitCh
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return w.err
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}
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type buildJob struct {
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cancel func()
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waitCh chan func(io.ReadCloser) error
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}
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func newBuildJob() *buildJob {
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return &buildJob{waitCh: make(chan func(io.ReadCloser) error)}
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}
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func (j *buildJob) WaitUpload(ctx context.Context) (io.ReadCloser, error) {
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done := make(chan struct{})
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var upload io.ReadCloser
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fn := func(rc io.ReadCloser) error {
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w := &wrapRC{ReadCloser: rc, waitCh: make(chan struct{})}
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upload = w
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close(done)
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return w.wait()
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}
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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case j.waitCh <- fn:
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<-done
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return upload, nil
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}
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}
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func (j *buildJob) SetUpload(ctx context.Context, rc io.ReadCloser) error {
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select {
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case <-ctx.Done():
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return ctx.Err()
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case fn := <-j.waitCh:
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return fn(rc)
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}
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}
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// toBuildkitExtraHosts converts hosts from docker key:value format to buildkit's csv format
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func toBuildkitExtraHosts(inp []string) (string, error) {
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if len(inp) == 0 {
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return "", nil
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}
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hosts := make([]string, 0, len(inp))
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for _, h := range inp {
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parts := strings.Split(h, ":")
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if len(parts) != 2 || parts[0] == "" || net.ParseIP(parts[1]) == nil {
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return "", errors.Errorf("invalid host %s", h)
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}
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hosts = append(hosts, parts[0]+"="+parts[1])
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}
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return strings.Join(hosts, ","), nil
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}
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func toBuildkitPruneInfo(opts types.BuildCachePruneOptions) (client.PruneInfo, error) {
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var until time.Duration
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untilValues := opts.Filters.Get("until") // canonical
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unusedForValues := opts.Filters.Get("unused-for") // deprecated synonym for "until" filter
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if len(untilValues) > 0 && len(unusedForValues) > 0 {
|
|
return client.PruneInfo{}, errConflictFilter{"until", "unused-for"}
|
|
}
|
|
filterKey := "until"
|
|
if len(unusedForValues) > 0 {
|
|
filterKey = "unused-for"
|
|
}
|
|
untilValues = append(untilValues, unusedForValues...)
|
|
|
|
switch len(untilValues) {
|
|
case 0:
|
|
// nothing to do
|
|
case 1:
|
|
var err error
|
|
until, err = time.ParseDuration(untilValues[0])
|
|
if err != nil {
|
|
return client.PruneInfo{}, errors.Wrapf(err, "%q filter expects a duration (e.g., '24h')", filterKey)
|
|
}
|
|
default:
|
|
return client.PruneInfo{}, errMultipleFilterValues{}
|
|
}
|
|
|
|
bkFilter := make([]string, 0, opts.Filters.Len())
|
|
for cacheField := range cacheFields {
|
|
if opts.Filters.Include(cacheField) {
|
|
values := opts.Filters.Get(cacheField)
|
|
switch len(values) {
|
|
case 0:
|
|
bkFilter = append(bkFilter, cacheField)
|
|
case 1:
|
|
if cacheField == "id" {
|
|
bkFilter = append(bkFilter, cacheField+"~="+values[0])
|
|
} else {
|
|
bkFilter = append(bkFilter, cacheField+"=="+values[0])
|
|
}
|
|
default:
|
|
return client.PruneInfo{}, errMultipleFilterValues{}
|
|
}
|
|
}
|
|
}
|
|
return client.PruneInfo{
|
|
All: opts.All,
|
|
KeepDuration: until,
|
|
KeepBytes: opts.KeepStorage,
|
|
Filter: []string{strings.Join(bkFilter, ",")},
|
|
}, nil
|
|
}
|