DockerCLI/cli/command/image/build_buildkit.go

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package image
import (
"bytes"
"context"
"encoding/csv"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/containerd/console"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/image/build"
"github.com/docker/cli/opts"
"github.com/docker/docker/api/types"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/urlutil"
controlapi "github.com/moby/buildkit/api/services/control"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/session/auth/authprovider"
"github.com/moby/buildkit/session/filesync"
"github.com/moby/buildkit/session/secrets/secretsprovider"
"github.com/moby/buildkit/session/sshforward/sshprovider"
"github.com/moby/buildkit/util/appcontext"
"github.com/moby/buildkit/util/progress/progressui"
"github.com/pkg/errors"
fsutiltypes "github.com/tonistiigi/fsutil/types"
"golang.org/x/sync/errgroup"
)
const uploadRequestRemote = "upload-request"
var errDockerfileConflict = errors.New("ambiguous Dockerfile source: both stdin and flag correspond to Dockerfiles")
//nolint: gocyclo
func runBuildBuildKit(dockerCli command.Cli, options buildOptions) error {
ctx := appcontext.Context()
s, err := trySession(dockerCli, options.context, false)
if err != nil {
return err
}
if s == nil {
return errors.Errorf("buildkit not supported by daemon")
}
if options.imageIDFile != "" {
// Avoid leaving a stale file if we eventually fail
if err := os.Remove(options.imageIDFile); err != nil && !os.IsNotExist(err) {
return errors.Wrap(err, "removing image ID file")
}
}
var (
remote string
body io.Reader
dockerfileName = options.dockerfileName
dockerfileReader io.ReadCloser
dockerfileDir string
contextDir string
)
switch {
case options.contextFromStdin():
if options.dockerfileFromStdin() {
return errStdinConflict
}
rc, isArchive, err := build.DetectArchiveReader(os.Stdin)
if err != nil {
return err
}
if isArchive {
body = rc
remote = uploadRequestRemote
} else {
if options.dockerfileName != "" {
return errDockerfileConflict
}
dockerfileReader = rc
remote = clientSessionRemote
// TODO: make fssync handle empty contextdir
contextDir, _ = ioutil.TempDir("", "empty-dir")
defer os.RemoveAll(contextDir)
}
case isLocalDir(options.context):
contextDir = options.context
if options.dockerfileFromStdin() {
dockerfileReader = os.Stdin
} else if options.dockerfileName != "" {
dockerfileName = filepath.Base(options.dockerfileName)
dockerfileDir = filepath.Dir(options.dockerfileName)
} else {
dockerfileDir = options.context
}
remote = clientSessionRemote
case urlutil.IsGitURL(options.context):
remote = options.context
case urlutil.IsURL(options.context):
remote = options.context
default:
return errors.Errorf("unable to prepare context: path %q not found", options.context)
}
if dockerfileReader != nil {
dockerfileName = build.DefaultDockerfileName
dockerfileDir, err = build.WriteTempDockerfile(dockerfileReader)
if err != nil {
return err
}
defer os.RemoveAll(dockerfileDir)
}
if dockerfileDir != "" {
s.Allow(filesync.NewFSSyncProvider([]filesync.SyncedDir{
{
Name: "context",
Dir: contextDir,
Map: resetUIDAndGID,
},
{
Name: "dockerfile",
Dir: dockerfileDir,
},
}))
}
s.Allow(authprovider.NewDockerAuthProvider())
if len(options.secrets) > 0 {
sp, err := parseSecretSpecs(options.secrets)
if err != nil {
return errors.Wrapf(err, "could not parse secrets: %v", options.secrets)
}
s.Allow(sp)
}
if len(options.ssh) > 0 {
sshp, err := parseSSHSpecs(options.ssh)
if err != nil {
return errors.Wrapf(err, "could not parse ssh: %v", options.ssh)
}
s.Allow(sshp)
}
eg, ctx := errgroup.WithContext(ctx)
eg.Go(func() error {
return s.Run(context.TODO(), dockerCli.Client().DialSession)
})
buildID := stringid.GenerateRandomID()
if body != nil {
eg.Go(func() error {
buildOptions := types.ImageBuildOptions{
Version: types.BuilderBuildKit,
BuildID: uploadRequestRemote + ":" + buildID,
}
response, err := dockerCli.Client().ImageBuild(context.Background(), body, buildOptions)
if err != nil {
return err
}
defer response.Body.Close()
return nil
})
}
eg.Go(func() error {
defer func() { // make sure the Status ends cleanly on build errors
s.Close()
}()
buildOptions := imageBuildOptions(dockerCli, options)
buildOptions.Version = types.BuilderBuildKit
buildOptions.Dockerfile = dockerfileName
//buildOptions.AuthConfigs = authConfigs // handled by session
buildOptions.RemoteContext = remote
buildOptions.SessionID = s.ID()
buildOptions.BuildID = buildID
return doBuild(ctx, eg, dockerCli, options, buildOptions)
})
return eg.Wait()
}
//nolint: gocyclo
func doBuild(ctx context.Context, eg *errgroup.Group, dockerCli command.Cli, options buildOptions, buildOptions types.ImageBuildOptions) (finalErr error) {
response, err := dockerCli.Client().ImageBuild(context.Background(), nil, buildOptions)
if err != nil {
return err
}
defer response.Body.Close()
done := make(chan struct{})
defer close(done)
eg.Go(func() error {
select {
case <-ctx.Done():
return dockerCli.Client().BuildCancel(context.TODO(), buildOptions.BuildID)
case <-done:
}
return nil
})
t := newTracer()
ssArr := []*client.SolveStatus{}
if err := opts.ValidateProgressOutput(options.progress); err != nil {
return err
}
displayStatus := func(out *os.File, displayCh chan *client.SolveStatus) {
var c console.Console
// TODO: Handle tty output in non-tty environment.
if cons, err := console.ConsoleFromFile(out); err == nil && (options.progress == "auto" || options.progress == "tty") {
c = cons
}
// not using shared context to not disrupt display but let is finish reporting errors
eg.Go(func() error {
return progressui.DisplaySolveStatus(context.TODO(), "", c, out, displayCh)
})
}
if options.quiet {
eg.Go(func() error {
// TODO: make sure t.displayCh closes
for ss := range t.displayCh {
ssArr = append(ssArr, ss)
}
<-done
// TODO: verify that finalErr is indeed set when error occurs
if finalErr != nil {
displayCh := make(chan *client.SolveStatus)
go func() {
for _, ss := range ssArr {
displayCh <- ss
}
close(displayCh)
}()
displayStatus(os.Stderr, displayCh)
}
return nil
})
} else {
displayStatus(os.Stdout, t.displayCh)
}
defer close(t.displayCh)
buf := bytes.NewBuffer(nil)
imageID := ""
writeAux := func(msg jsonmessage.JSONMessage) {
if msg.ID == "moby.image.id" {
var result types.BuildResult
if err := json.Unmarshal(*msg.Aux, &result); err != nil {
fmt.Fprintf(dockerCli.Err(), "failed to parse aux message: %v", err)
}
imageID = result.ID
return
}
t.write(msg)
}
err = jsonmessage.DisplayJSONMessagesStream(response.Body, buf, dockerCli.Out().FD(), dockerCli.Out().IsTerminal(), writeAux)
if err != nil {
if jerr, ok := err.(*jsonmessage.JSONError); ok {
// If no error code is set, default to 1
if jerr.Code == 0 {
jerr.Code = 1
}
return cli.StatusError{Status: jerr.Message, StatusCode: jerr.Code}
}
}
// Everything worked so if -q was provided the output from the daemon
// should be just the image ID and we'll print that to stdout.
//
// TODO: we may want to use Aux messages with ID "moby.image.id" regardless of options.quiet (i.e. don't send HTTP param q=1)
// instead of assuming that output is image ID if options.quiet.
if options.quiet {
imageID = buf.String()
fmt.Fprint(dockerCli.Out(), imageID)
}
if options.imageIDFile != "" {
if imageID == "" {
return errors.Errorf("cannot write %s because server did not provide an image ID", options.imageIDFile)
}
imageID = strings.TrimSpace(imageID)
if err := ioutil.WriteFile(options.imageIDFile, []byte(imageID), 0666); err != nil {
return errors.Wrap(err, "cannot write image ID file")
}
}
return err
}
func resetUIDAndGID(s *fsutiltypes.Stat) bool {
s.Uid = 0
s.Gid = 0
return true
}
type tracer struct {
displayCh chan *client.SolveStatus
}
func newTracer() *tracer {
return &tracer{
displayCh: make(chan *client.SolveStatus),
}
}
func (t *tracer) write(msg jsonmessage.JSONMessage) {
var resp controlapi.StatusResponse
if msg.ID != "moby.buildkit.trace" {
return
}
var dt []byte
// ignoring all messages that are not understood
if err := json.Unmarshal(*msg.Aux, &dt); err != nil {
return
}
if err := (&resp).Unmarshal(dt); err != nil {
return
}
s := client.SolveStatus{}
for _, v := range resp.Vertexes {
s.Vertexes = append(s.Vertexes, &client.Vertex{
Digest: v.Digest,
Inputs: v.Inputs,
Name: v.Name,
Started: v.Started,
Completed: v.Completed,
Error: v.Error,
Cached: v.Cached,
})
}
for _, v := range resp.Statuses {
s.Statuses = append(s.Statuses, &client.VertexStatus{
ID: v.ID,
Vertex: v.Vertex,
Name: v.Name,
Total: v.Total,
Current: v.Current,
Timestamp: v.Timestamp,
Started: v.Started,
Completed: v.Completed,
})
}
for _, v := range resp.Logs {
s.Logs = append(s.Logs, &client.VertexLog{
Vertex: v.Vertex,
Stream: int(v.Stream),
Data: v.Msg,
Timestamp: v.Timestamp,
})
}
t.displayCh <- &s
}
func parseSecretSpecs(sl []string) (session.Attachable, error) {
fs := make([]secretsprovider.FileSource, 0, len(sl))
for _, v := range sl {
s, err := parseSecret(v)
if err != nil {
return nil, err
}
fs = append(fs, *s)
}
store, err := secretsprovider.NewFileStore(fs)
if err != nil {
return nil, err
}
return secretsprovider.NewSecretProvider(store), nil
}
func parseSecret(value string) (*secretsprovider.FileSource, error) {
csvReader := csv.NewReader(strings.NewReader(value))
fields, err := csvReader.Read()
if err != nil {
return nil, errors.Wrap(err, "failed to parse csv secret")
}
fs := secretsprovider.FileSource{}
for _, field := range fields {
parts := strings.SplitN(field, "=", 2)
key := strings.ToLower(parts[0])
if len(parts) != 2 {
return nil, errors.Errorf("invalid field '%s' must be a key=value pair", field)
}
value := parts[1]
switch key {
case "type":
if value != "file" {
return nil, errors.Errorf("unsupported secret type %q", value)
}
case "id":
fs.ID = value
case "source", "src":
fs.FilePath = value
default:
return nil, errors.Errorf("unexpected key '%s' in '%s'", key, field)
}
}
return &fs, nil
}
func parseSSHSpecs(sl []string) (session.Attachable, error) {
configs := make([]sshprovider.AgentConfig, 0, len(sl))
for _, v := range sl {
c, err := parseSSH(v)
if err != nil {
return nil, err
}
configs = append(configs, *c)
}
return sshprovider.NewSSHAgentProvider(configs)
}
func parseSSH(value string) (*sshprovider.AgentConfig, error) {
parts := strings.SplitN(value, "=", 2)
cfg := sshprovider.AgentConfig{
ID: parts[0],
}
if len(parts) > 1 {
cfg.Paths = strings.Split(parts[1], ",")
}
return &cfg, nil
}