package images import ( "archive/tar" "compress/gzip" "context" "encoding/json" "fmt" "io" "io/ioutil" "net/http" "net/url" "os" "path/filepath" "regexp" "runtime" "strconv" "strings" "github.com/containers/buildah/define" "github.com/containers/podman/v3/pkg/auth" "github.com/containers/podman/v3/pkg/bindings" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/containers/storage/pkg/fileutils" "github.com/containers/storage/pkg/ioutils" "github.com/docker/go-units" "github.com/hashicorp/go-multierror" jsoniter "github.com/json-iterator/go" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) type devino struct { Dev uint64 Ino uint64 } var ( iidRegex = regexp.MustCompile(`^[0-9a-f]{12}`) ) // Build creates an image using a containerfile reference func Build(ctx context.Context, containerFiles []string, options entities.BuildOptions) (*entities.BuildReport, error) { if options.CommonBuildOpts == nil { options.CommonBuildOpts = new(define.CommonBuildOptions) } params := url.Values{} if caps := options.AddCapabilities; len(caps) > 0 { c, err := jsoniter.MarshalToString(caps) if err != nil { return nil, err } params.Add("addcaps", c) } if annotations := options.Annotations; len(annotations) > 0 { l, err := jsoniter.MarshalToString(annotations) if err != nil { return nil, err } params.Set("annotations", l) } if options.AllPlatforms { params.Add("allplatforms", "1") } params.Add("t", options.Output) for _, tag := range options.AdditionalTags { params.Add("t", tag) } if buildArgs := options.Args; len(buildArgs) > 0 { bArgs, err := jsoniter.MarshalToString(buildArgs) if err != nil { return nil, err } params.Set("buildargs", bArgs) } if excludes := options.Excludes; len(excludes) > 0 { bArgs, err := jsoniter.MarshalToString(excludes) if err != nil { return nil, err } params.Set("excludes", bArgs) } if cpuPeriod := options.CommonBuildOpts.CPUPeriod; cpuPeriod > 0 { params.Set("cpuperiod", strconv.Itoa(int(cpuPeriod))) } if cpuQuota := options.CommonBuildOpts.CPUQuota; cpuQuota > 0 { params.Set("cpuquota", strconv.Itoa(int(cpuQuota))) } if cpuSetCpus := options.CommonBuildOpts.CPUSetCPUs; len(cpuSetCpus) > 0 { params.Set("cpusetcpus", cpuSetCpus) } if cpuSetMems := options.CommonBuildOpts.CPUSetMems; len(cpuSetMems) > 0 { params.Set("cpusetmems", cpuSetMems) } if cpuShares := options.CommonBuildOpts.CPUShares; cpuShares > 0 { params.Set("cpushares", strconv.Itoa(int(cpuShares))) } if len(options.CommonBuildOpts.CgroupParent) > 0 { params.Set("cgroupparent", options.CommonBuildOpts.CgroupParent) } params.Set("networkmode", strconv.Itoa(int(options.ConfigureNetwork))) params.Set("outputformat", options.OutputFormat) if devices := options.Devices; len(devices) > 0 { d, err := jsoniter.MarshalToString(devices) if err != nil { return nil, err } params.Add("devices", d) } if dnsservers := options.CommonBuildOpts.DNSServers; len(dnsservers) > 0 { c, err := jsoniter.MarshalToString(dnsservers) if err != nil { return nil, err } params.Add("dnsservers", c) } if dnsoptions := options.CommonBuildOpts.DNSOptions; len(dnsoptions) > 0 { c, err := jsoniter.MarshalToString(dnsoptions) if err != nil { return nil, err } params.Add("dnsoptions", c) } if dnssearch := options.CommonBuildOpts.DNSSearch; len(dnssearch) > 0 { c, err := jsoniter.MarshalToString(dnssearch) if err != nil { return nil, err } params.Add("dnssearch", c) } if caps := options.DropCapabilities; len(caps) > 0 { c, err := jsoniter.MarshalToString(caps) if err != nil { return nil, err } params.Add("dropcaps", c) } if options.ForceRmIntermediateCtrs { params.Set("forcerm", "1") } if options.RemoveIntermediateCtrs { params.Set("rm", "1") } else { params.Set("rm", "0") } if len(options.From) > 0 { params.Set("from", options.From) } if options.IgnoreUnrecognizedInstructions { params.Set("ignore", "1") } params.Set("isolation", strconv.Itoa(int(options.Isolation))) if options.CommonBuildOpts.HTTPProxy { params.Set("httpproxy", "1") } if options.Jobs != nil { params.Set("jobs", strconv.FormatUint(uint64(*options.Jobs), 10)) } if labels := options.Labels; len(labels) > 0 { l, err := jsoniter.MarshalToString(labels) if err != nil { return nil, err } params.Set("labels", l) } if opt := options.CommonBuildOpts.LabelOpts; len(opt) > 0 { o, err := jsoniter.MarshalToString(opt) if err != nil { return nil, err } params.Set("labelopts", o) } if len(options.CommonBuildOpts.SeccompProfilePath) > 0 { params.Set("seccomp", options.CommonBuildOpts.SeccompProfilePath) } if len(options.CommonBuildOpts.ApparmorProfile) > 0 { params.Set("apparmor", options.CommonBuildOpts.ApparmorProfile) } if options.Layers { params.Set("layers", "1") } if options.LogRusage { params.Set("rusage", "1") } if len(options.RusageLogFile) > 0 { params.Set("rusagelogfile", options.RusageLogFile) } if len(options.Manifest) > 0 { params.Set("manifest", options.Manifest) } if memSwap := options.CommonBuildOpts.MemorySwap; memSwap > 0 { params.Set("memswap", strconv.Itoa(int(memSwap))) } if mem := options.CommonBuildOpts.Memory; mem > 0 { params.Set("memory", strconv.Itoa(int(mem))) } if options.NoCache { params.Set("nocache", "1") } if t := options.Output; len(t) > 0 { params.Set("output", t) } var platform string if len(options.OS) > 0 { platform = options.OS } if len(options.Architecture) > 0 { if len(platform) == 0 { platform = "linux" } platform += "/" + options.Architecture } else { if len(platform) > 0 { platform += "/" + runtime.GOARCH } } if len(platform) > 0 { params.Set("platform", platform) } if len(options.Platforms) > 0 { params.Del("platform") for _, platformSpec := range options.Platforms { platform = platformSpec.OS + "/" + platformSpec.Arch if platformSpec.Variant != "" { platform += "/" + platformSpec.Variant } params.Add("platform", platform) } } if contextDir, err := filepath.EvalSymlinks(options.ContextDirectory); err == nil { options.ContextDirectory = contextDir } params.Set("pullpolicy", options.PullPolicy.String()) if options.Quiet { params.Set("q", "1") } if options.RemoveIntermediateCtrs { params.Set("rm", "1") } if len(options.Target) > 0 { params.Set("target", options.Target) } if hosts := options.CommonBuildOpts.AddHost; len(hosts) > 0 { h, err := jsoniter.MarshalToString(hosts) if err != nil { return nil, err } params.Set("extrahosts", h) } if nsoptions := options.NamespaceOptions; len(nsoptions) > 0 { ns, err := jsoniter.MarshalToString(nsoptions) if err != nil { return nil, err } params.Set("nsoptions", ns) } if shmSize := options.CommonBuildOpts.ShmSize; len(shmSize) > 0 { shmBytes, err := units.RAMInBytes(shmSize) if err != nil { return nil, err } params.Set("shmsize", strconv.Itoa(int(shmBytes))) } if options.Squash { params.Set("squash", "1") } if options.Timestamp != nil { t := *options.Timestamp params.Set("timestamp", strconv.FormatInt(t.Unix(), 10)) } if len(options.CommonBuildOpts.Ulimit) > 0 { ulimitsJSON, err := json.Marshal(options.CommonBuildOpts.Ulimit) if err != nil { return nil, err } params.Set("ulimits", string(ulimitsJSON)) } for _, uenv := range options.UnsetEnvs { params.Add("unsetenv", uenv) } var ( headers http.Header err error ) if options.SystemContext != nil && options.SystemContext.DockerAuthConfig != nil { headers, err = auth.MakeXRegistryAuthHeader(options.SystemContext, options.SystemContext.DockerAuthConfig.Username, options.SystemContext.DockerAuthConfig.Password) } else { headers, err = auth.MakeXRegistryConfigHeader(options.SystemContext, "", "") } if err != nil { return nil, err } stdout := io.Writer(os.Stdout) if options.Out != nil { stdout = options.Out } excludes := options.Excludes if len(excludes) == 0 { excludes, err = parseDockerignore(options.ContextDirectory) if err != nil { return nil, err } } contextDir, err := filepath.Abs(options.ContextDirectory) if err != nil { logrus.Errorf("Cannot find absolute path of %v: %v", options.ContextDirectory, err) return nil, err } tarContent := []string{options.ContextDirectory} newContainerFiles := []string{} dontexcludes := []string{"!Dockerfile", "!Containerfile", "!.dockerignore", "!.containerignore"} for _, c := range containerFiles { if c == "/dev/stdin" { content, err := ioutil.ReadAll(os.Stdin) if err != nil { return nil, err } tmpFile, err := ioutil.TempFile("", "build") if err != nil { return nil, err } defer os.Remove(tmpFile.Name()) // clean up defer tmpFile.Close() if _, err := tmpFile.Write(content); err != nil { return nil, err } c = tmpFile.Name() } cfDir := filepath.Dir(c) if absDir, err := filepath.EvalSymlinks(cfDir); err == nil { name := filepath.ToSlash(strings.TrimPrefix(c, cfDir+string(filepath.Separator))) c = filepath.Join(absDir, name) } containerfile, err := filepath.Abs(c) if err != nil { logrus.Errorf("Cannot find absolute path of %v: %v", c, err) return nil, err } // Check if Containerfile is in the context directory, if so truncate the contextdirectory off path // Do NOT add to tarfile if strings.HasPrefix(containerfile, contextDir+string(filepath.Separator)) { containerfile = strings.TrimPrefix(containerfile, contextDir+string(filepath.Separator)) dontexcludes = append(dontexcludes, "!"+containerfile) } else { // If Containerfile does not exists assume it is in context directory, do Not add to tarfile if _, err := os.Lstat(containerfile); err != nil { if !os.IsNotExist(err) { return nil, err } containerfile = c } else { // If Containerfile does exists but is not in context directory add it to the tarfile tarContent = append(tarContent, containerfile) } } newContainerFiles = append(newContainerFiles, containerfile) } if len(newContainerFiles) > 0 { cFileJSON, err := json.Marshal(newContainerFiles) if err != nil { return nil, err } params.Set("dockerfile", string(cFileJSON)) } // build secrets are usually absolute host path or relative to context dir on host // in any case move secret to current context and ship the tar. if secrets := options.CommonBuildOpts.Secrets; len(secrets) > 0 { secretsForRemote := []string{} for _, secret := range secrets { secretOpt := strings.Split(secret, ",") if len(secretOpt) > 0 { modifiedOpt := []string{} for _, token := range secretOpt { arr := strings.SplitN(token, "=", 2) if len(arr) > 1 { if arr[0] == "src" { // read specified secret into a tmp file // move tmp file to tar and change secret source to relative tmp file tmpSecretFile, err := ioutil.TempFile(options.ContextDirectory, "podman-build-secret") if err != nil { return nil, err } defer os.Remove(tmpSecretFile.Name()) // clean up defer tmpSecretFile.Close() srcSecretFile, err := os.Open(arr[1]) if err != nil { return nil, err } defer srcSecretFile.Close() _, err = io.Copy(tmpSecretFile, srcSecretFile) if err != nil { return nil, err } // add tmp file to context dir tarContent = append(tarContent, tmpSecretFile.Name()) modifiedSrc := fmt.Sprintf("src=%s", filepath.Base(tmpSecretFile.Name())) modifiedOpt = append(modifiedOpt, modifiedSrc) } else { modifiedOpt = append(modifiedOpt, token) } } } secretsForRemote = append(secretsForRemote, strings.Join(modifiedOpt[:], ",")) } } c, err := jsoniter.MarshalToString(secretsForRemote) if err != nil { return nil, err } params.Add("secrets", c) } tarfile, err := nTar(append(excludes, dontexcludes...), tarContent...) if err != nil { logrus.Errorf("Cannot tar container entries %v error: %v", tarContent, err) return nil, err } defer func() { if err := tarfile.Close(); err != nil { logrus.Errorf("%v\n", err) } }() conn, err := bindings.GetClient(ctx) if err != nil { return nil, err } response, err := conn.DoRequest(ctx, tarfile, http.MethodPost, "/build", params, headers) if err != nil { return nil, err } defer response.Body.Close() if !response.IsSuccess() { return nil, response.Process(err) } body := response.Body.(io.Reader) if logrus.IsLevelEnabled(logrus.DebugLevel) { if v, found := os.LookupEnv("PODMAN_RETAIN_BUILD_ARTIFACT"); found { if keep, _ := strconv.ParseBool(v); keep { t, _ := ioutil.TempFile("", "build_*_client") defer t.Close() body = io.TeeReader(response.Body, t) } } } dec := json.NewDecoder(body) var id string for { var s struct { Stream string `json:"stream,omitempty"` Error string `json:"error,omitempty"` } select { // FIXME(vrothberg): it seems we always hit the EOF case below, // even when the server quit but it seems desirable to // distinguish a proper build from a transient EOF. case <-response.Request.Context().Done(): return &entities.BuildReport{ID: id}, nil default: // non-blocking select } if err := dec.Decode(&s); err != nil { if errors.Is(err, io.ErrUnexpectedEOF) { return nil, errors.Wrap(err, "server probably quit") } // EOF means the stream is over in which case we need // to have read the id. if errors.Is(err, io.EOF) && id != "" { break } return &entities.BuildReport{ID: id}, errors.Wrap(err, "decoding stream") } switch { case s.Stream != "": raw := []byte(s.Stream) stdout.Write(raw) if iidRegex.Match(raw) { id = strings.TrimSuffix(s.Stream, "\n") } case s.Error != "": // If there's an error, return directly. The stream // will be closed on return. return &entities.BuildReport{ID: id}, errors.New(s.Error) default: return &entities.BuildReport{ID: id}, errors.New("failed to parse build results stream, unexpected input") } } return &entities.BuildReport{ID: id}, nil } func nTar(excludes []string, sources ...string) (io.ReadCloser, error) { pm, err := fileutils.NewPatternMatcher(excludes) if err != nil { return nil, errors.Wrapf(err, "error processing excludes list %v", excludes) } if len(sources) == 0 { return nil, errors.New("No source(s) provided for build") } pr, pw := io.Pipe() gw := gzip.NewWriter(pw) tw := tar.NewWriter(gw) var merr *multierror.Error go func() { defer pw.Close() defer gw.Close() defer tw.Close() seen := make(map[devino]string) for _, src := range sources { s, err := filepath.Abs(src) if err != nil { logrus.Errorf("Cannot stat one of source context: %v", err) merr = multierror.Append(merr, err) return } err = filepath.Walk(s, func(path string, info os.FileInfo, err error) error { if err != nil { return err } if path == s { return nil // skip root dir } name := filepath.ToSlash(strings.TrimPrefix(path, s+string(filepath.Separator))) excluded, err := pm.Matches(name) // nolint:staticcheck if err != nil { return errors.Wrapf(err, "error checking if %q is excluded", name) } if excluded { return nil } if info.Mode().IsRegular() { // add file item di, isHardLink := checkHardLink(info) if err != nil { return err } hdr, err := tar.FileInfoHeader(info, "") if err != nil { return err } hdr.Uid, hdr.Gid = 0, 0 orig, ok := seen[di] if ok { hdr.Typeflag = tar.TypeLink hdr.Linkname = orig hdr.Size = 0 hdr.Name = name return tw.WriteHeader(hdr) } f, err := os.Open(path) if err != nil { return err } hdr.Name = name if err := tw.WriteHeader(hdr); err != nil { f.Close() return err } _, err = io.Copy(tw, f) f.Close() if err == nil && isHardLink { seen[di] = name } return err } else if info.Mode().IsDir() { // add folders hdr, lerr := tar.FileInfoHeader(info, name) if lerr != nil { return lerr } hdr.Name = name hdr.Uid, hdr.Gid = 0, 0 if lerr := tw.WriteHeader(hdr); lerr != nil { return lerr } } else if info.Mode()&os.ModeSymlink != 0 { // add symlinks as it, not content link, err := os.Readlink(path) if err != nil { return err } hdr, lerr := tar.FileInfoHeader(info, link) if lerr != nil { return lerr } hdr.Name = name hdr.Uid, hdr.Gid = 0, 0 if lerr := tw.WriteHeader(hdr); lerr != nil { return lerr } } // skip other than file,folder and symlinks return nil }) merr = multierror.Append(merr, err) } }() rc := ioutils.NewReadCloserWrapper(pr, func() error { if merr != nil { merr = multierror.Append(merr, pr.Close()) return merr.ErrorOrNil() } return pr.Close() }) return rc, nil } func parseDockerignore(root string) ([]string, error) { ignore, err := ioutil.ReadFile(filepath.Join(root, ".containerignore")) if err != nil { var dockerIgnoreErr error ignore, dockerIgnoreErr = ioutil.ReadFile(filepath.Join(root, ".dockerignore")) if dockerIgnoreErr != nil && !os.IsNotExist(dockerIgnoreErr) { return nil, errors.Wrapf(err, "error reading .containerignore: '%s'", root) } } rawexcludes := strings.Split(string(ignore), "\n") excludes := make([]string, 0, len(rawexcludes)) for _, e := range rawexcludes { if len(e) == 0 || e[0] == '#' { continue } excludes = append(excludes, e) } return excludes, nil }