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dockerfile_builder.go
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dockerfile_builder.go
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package imgsrc
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net"
"os"
"path/filepath"
"time"
"github.com/containerd/console"
"github.com/docker/docker/api/types"
dockerclient "github.com/docker/docker/client"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/session/secrets/secretsprovider"
"github.com/moby/buildkit/util/progress/progressui"
"github.com/moby/term"
"github.com/pkg/errors"
"github.com/superfly/flyctl/helpers"
"github.com/superfly/flyctl/internal/cmdfmt"
"github.com/superfly/flyctl/internal/render"
"github.com/superfly/flyctl/iostreams"
"github.com/superfly/flyctl/terminal"
"golang.org/x/sync/errgroup"
)
type dockerfileBuilder struct{}
func (*dockerfileBuilder) Name() string {
return "Dockerfile"
}
// lastProgressOutput is the same as progress.Output except
// that it only output with the last update. It is used in
// non terminal scenarios to suppress verbose messages
type lastProgressOutput struct {
output progress.Output
}
// WriteProgress formats progress information from a ProgressReader.
func (out *lastProgressOutput) WriteProgress(prog progress.Progress) error {
if !prog.LastUpdate {
return nil
}
return out.output.WriteProgress(prog)
}
func (*dockerfileBuilder) Run(ctx context.Context, dockerFactory *dockerClientFactory, streams *iostreams.IOStreams, opts ImageOptions, build *build) (*DeploymentImage, string, error) {
build.BuildStart()
if !dockerFactory.mode.IsAvailable() {
// Where should debug messages be sent?
terminal.Debug("docker daemon not available, skipping")
build.BuildFinish()
return nil, "", nil
}
var dockerfile string
if opts.DockerfilePath != "" {
if !helpers.FileExists(opts.DockerfilePath) {
build.BuildFinish()
return nil, "", fmt.Errorf("Dockerfile '%s' not found", opts.DockerfilePath)
}
dockerfile = opts.DockerfilePath
} else {
dockerfile = resolveDockerfile(opts.WorkingDir)
}
if dockerfile == "" {
terminal.Debug("dockerfile not found, skipping")
build.BuildFinish()
return nil, "", nil
}
build.BuilderInitStart()
docker, err := dockerFactory.buildFn(ctx, build)
if err != nil {
build.BuildFinish()
build.BuilderInitFinish()
return nil, "", errors.Wrap(err, "error connecting to docker")
}
build.BuilderInitFinish()
defer clearDeploymentTags(ctx, docker, opts.Tag)
build.ContextBuildStart()
tb := render.NewTextBlock(ctx, "Creating build context")
archiveOpts := archiveOptions{
sourcePath: opts.WorkingDir,
compressed: dockerFactory.IsRemote(),
}
excludes, err := readDockerignore(opts.WorkingDir, opts.IgnorefilePath)
if err != nil {
build.BuildFinish()
build.ContextBuildFinish()
return nil, "", errors.Wrap(err, "error reading .dockerignore")
}
archiveOpts.exclusions = excludes
var relativedockerfilePath string
// copy dockerfile into the archive if it's outside the context dir
if !isPathInRoot(dockerfile, opts.WorkingDir) {
dockerfileData, err := os.ReadFile(dockerfile)
if err != nil {
build.BuildFinish()
build.ContextBuildFinish()
return nil, "", errors.Wrap(err, "error reading Dockerfile")
}
archiveOpts.additions = map[string][]byte{
"Dockerfile": dockerfileData,
}
} else {
// pass the relative path to Dockerfile within the context
p, err := filepath.Rel(opts.WorkingDir, dockerfile)
if err != nil {
build.BuildFinish()
build.ContextBuildFinish()
return nil, "", err
}
// On Windows, convert \ to a slash / as the docker build will
// run in a Linux VM at the end.
relativedockerfilePath = filepath.ToSlash(p)
}
// Start tracking this build
// Create the docker build context as a compressed tar stream
r, err := archiveDirectory(archiveOpts)
if err != nil {
build.BuildFinish()
build.ContextBuildFinish()
return nil, "", errors.Wrap(err, "error archiving build context")
}
build.ContextBuildFinish()
tb.Done("Creating build context done")
// Setup an upload progress bar
progressOutput := streamformatter.NewProgressOutput(streams.Out)
if !streams.IsStdoutTTY() {
progressOutput = &lastProgressOutput{output: progressOutput}
}
r = progress.NewProgressReader(r, progressOutput, 0, "", "Sending build context to Docker daemon")
var imageID string
build.ImageBuildStart()
terminal.Debug("fetching docker server info")
serverInfo, err := func() (types.Info, error) {
infoCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
return docker.Info(infoCtx)
}()
if err != nil {
build.ImageBuildFinish()
build.BuildFinish()
return nil, "", errors.Wrap(err, "error fetching docker server info")
}
docker_tb := render.NewTextBlock(ctx, "Building image with Docker")
msg := fmt.Sprintf("docker host: %s %s %s", serverInfo.ServerVersion, serverInfo.OSType, serverInfo.Architecture)
docker_tb.Done(msg)
buildArgs, err := normalizeBuildArgsForDocker(opts.BuildArgs)
if err != nil {
build.ImageBuildFinish()
build.BuildFinish()
return nil, "", fmt.Errorf("error parsing build args: %w", err)
}
buildkitEnabled, err := buildkitEnabled(docker)
terminal.Debugf("buildkitEnabled", buildkitEnabled)
if err != nil {
build.ImageBuildFinish()
build.BuildFinish()
return nil, "", errors.Wrap(err, "error checking for buildkit support")
}
build.SetBuilderMetaPart2(buildkitEnabled, serverInfo.ServerVersion, fmt.Sprintf("%s/%s/%s", serverInfo.OSType, serverInfo.Architecture, serverInfo.OSVersion))
if buildkitEnabled {
imageID, err = runBuildKitBuild(ctx, streams, docker, r, opts, relativedockerfilePath, buildArgs)
if err != nil {
build.ImageBuildFinish()
build.BuildFinish()
return nil, "", errors.Wrap(err, "error building")
}
} else {
imageID, err = runClassicBuild(ctx, streams, docker, r, opts, relativedockerfilePath, buildArgs)
if err != nil {
build.ImageBuildFinish()
build.BuildFinish()
return nil, "", errors.Wrap(err, "error building")
}
}
build.ImageBuildFinish()
build.BuildFinish()
cmdfmt.PrintDone(streams.ErrOut, "Building image done")
if opts.Publish {
build.PushStart()
tb := render.NewTextBlock(ctx, "Pushing image to fly")
if err := pushToFly(ctx, docker, streams, opts.Tag); err != nil {
build.PushFinish()
return nil, "", err
}
build.PushFinish()
tb.Done("Pushing image done")
}
img, _, err := docker.ImageInspectWithRaw(ctx, imageID)
if err != nil {
return nil, "", errors.Wrap(err, "count not find built image")
}
return &DeploymentImage{
ID: img.ID,
Tag: opts.Tag,
Size: img.Size,
}, "", nil
}
func normalizeBuildArgsForDocker(buildArgs map[string]string) (map[string]*string, error) {
out := map[string]*string{}
for k, v := range buildArgs {
val := v
out[k] = &val
}
return out, nil
}
func runClassicBuild(ctx context.Context, streams *iostreams.IOStreams, docker *dockerclient.Client, r io.ReadCloser, opts ImageOptions, dockerfilePath string, buildArgs map[string]*string) (imageID string, err error) {
options := types.ImageBuildOptions{
Tags: []string{opts.Tag},
BuildArgs: buildArgs,
AuthConfigs: authConfigs(),
Platform: "linux/amd64",
Dockerfile: dockerfilePath,
Target: opts.Target,
NoCache: opts.NoCache,
}
resp, err := docker.ImageBuild(ctx, r, options)
if err != nil {
return "", errors.Wrap(err, "error building with docker")
}
defer resp.Body.Close()
idCallback := func(m jsonmessage.JSONMessage) {
var aux types.BuildResult
if err := json.Unmarshal(*m.Aux, &aux); err != nil {
fmt.Fprintf(streams.Out, "failed to parse aux message: %v", err)
}
imageID = aux.ID
}
if err := jsonmessage.DisplayJSONMessagesStream(resp.Body, streams.ErrOut, streams.StderrFd(), streams.IsStderrTTY(), idCallback); err != nil {
return "", errors.Wrap(err, "error rendering build status stream")
}
return imageID, nil
}
const uploadRequestRemote = "upload-request"
func runBuildKitBuild(ctx context.Context, streams *iostreams.IOStreams, docker *dockerclient.Client, r io.ReadCloser, opts ImageOptions, dockerfilePath string, buildArgs map[string]*string) (imageID string, err error) {
io := iostreams.FromContext(ctx)
s, err := createBuildSession(opts.WorkingDir)
if err != nil {
panic(err)
}
s.Allow(newBuildkitAuthProvider())
if s == nil {
panic("buildkit not supported")
}
finalSecrets := make(map[string][]byte)
for k, v := range opts.BuildSecrets {
finalSecrets[k] = []byte(v)
}
s.Allow(secretsprovider.FromMap(finalSecrets))
eg, errCtx := errgroup.WithContext(ctx)
dialSession := func(ctx context.Context, proto string, meta map[string][]string) (net.Conn, error) {
return docker.DialHijack(errCtx, "/session", proto, meta)
}
eg.Go(func() error {
return s.Run(context.TODO(), dialSession)
})
buildID := stringid.GenerateRandomID()
eg.Go(func() error {
buildOptions := types.ImageBuildOptions{
Version: types.BuilderBuildKit,
BuildID: uploadRequestRemote + ":" + buildID,
}
response, err := docker.ImageBuild(ctx, r, buildOptions)
if err != nil {
return err
}
defer response.Body.Close()
return nil
})
eg.Go(func() error {
defer s.Close()
buildOpts := types.ImageBuildOptions{
Tags: []string{opts.Tag},
BuildArgs: buildArgs,
Version: types.BuilderBuildKit,
AuthConfigs: authConfigs(),
SessionID: s.ID(),
RemoteContext: uploadRequestRemote,
BuildID: buildID,
Platform: "linux/amd64",
Dockerfile: dockerfilePath,
Target: opts.Target,
NoCache: opts.NoCache,
}
return func() error {
resp, err := docker.ImageBuild(ctx, nil, buildOpts)
if err != nil {
return err
}
defer resp.Body.Close()
done := make(chan struct{})
defer close(done)
eg.Go(func() error {
select {
case <-ctx.Done():
return docker.BuildCancel(context.TODO(), buildOpts.BuildID)
case <-done:
}
return nil
})
// TODO: replace with iostreams
termFd, isTerm := term.GetFdInfo(os.Stderr)
tracer := newTracer()
var c2 console.Console
if io.ColorEnabled() {
if cons, err := console.ConsoleFromFile(os.Stderr); err == nil {
c2 = cons
}
}
consoleLogs := make(chan *client.SolveStatus)
eg.Go(func() error {
defer close(consoleLogs)
for v := range tracer.displayCh {
consoleLogs <- v
}
return nil
})
eg.Go(func() error {
return progressui.DisplaySolveStatus(context.TODO(), "", c2, os.Stderr, consoleLogs)
})
auxCallback := func(m jsonmessage.JSONMessage) {
if m.ID == "moby.image.id" {
var result types.BuildResult
if err := json.Unmarshal(*m.Aux, &result); err != nil {
fmt.Fprintf(streams.Out, "failed to parse aux message: %v", err)
}
imageID = result.ID
return
}
tracer.write(m)
}
defer close(tracer.displayCh)
buf := bytes.NewBuffer(nil)
if err := jsonmessage.DisplayJSONMessagesStream(resp.Body, buf, termFd, isTerm, auxCallback); err != nil {
return err
}
if os.Getenv("LOG_LEVEL") == "debug" {
f, err := os.OpenFile("build.log", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o600)
if err != nil {
return err
}
defer func() {
err := f.Close()
if err != nil {
terminal.Debugf("error closing build.log: %v", err)
}
}()
}
return nil
}()
})
if err := eg.Wait(); err != nil {
return "", err
}
return imageID, nil
}
func pushToFly(ctx context.Context, docker *dockerclient.Client, streams *iostreams.IOStreams, tag string) error {
pushResp, err := docker.ImagePush(ctx, tag, types.ImagePushOptions{
RegistryAuth: flyRegistryAuth(),
})
if err != nil {
return errors.Wrap(err, "error pushing image to registry")
}
defer pushResp.Close()
err = jsonmessage.DisplayJSONMessagesStream(pushResp, streams.ErrOut, streams.StderrFd(), streams.IsStderrTTY(), nil)
if err != nil {
var msgerr *jsonmessage.JSONError
if errors.As(err, &msgerr) {
if msgerr.Message == "denied: requested access to the resource is denied" {
return &RegistryUnauthorizedError{Tag: tag}
}
}
return errors.Wrap(err, "error rendering push status stream")
}
return nil
}