mirror of
https://github.com/seaweedfs/seaweedfs.git
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00707ec00f
Running mount outside of the cluster would not need to expose all the volume servers to outside of the cluster. The chunk read and write will go through the filer.
134 lines
3.2 KiB
Go
134 lines
3.2 KiB
Go
package source
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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/http"
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"strings"
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"google.golang.org/grpc"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/security"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type ReplicationSource interface {
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ReadPart(part string) io.ReadCloser
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}
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type FilerSource struct {
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grpcAddress string
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grpcDialOption grpc.DialOption
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Dir string
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address string
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proxyByFiler bool
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}
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func (fs *FilerSource) Initialize(configuration util.Configuration, prefix string) error {
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return fs.DoInitialize(
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"",
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configuration.GetString(prefix+"grpcAddress"),
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configuration.GetString(prefix+"directory"),
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false,
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)
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}
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func (fs *FilerSource) DoInitialize(address, grpcAddress string, dir string, readChunkFromFiler bool) (err error) {
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fs.address = address
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if fs.address == "" {
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fs.address = pb.GrpcAddressToServerAddress(grpcAddress)
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}
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fs.grpcAddress = grpcAddress
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fs.Dir = dir
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fs.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client")
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fs.proxyByFiler = readChunkFromFiler
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return nil
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}
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func (fs *FilerSource) LookupFileId(part string) (fileUrls []string, err error) {
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vid2Locations := make(map[string]*filer_pb.Locations)
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vid := volumeId(part)
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err = fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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glog.V(4).Infof("read lookup volume id locations: %v", vid)
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resp, err := client.LookupVolume(context.Background(), &filer_pb.LookupVolumeRequest{
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VolumeIds: []string{vid},
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})
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if err != nil {
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return err
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}
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vid2Locations = resp.LocationsMap
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return nil
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})
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if err != nil {
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glog.V(1).Infof("LookupFileId volume id %s: %v", vid, err)
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return nil, fmt.Errorf("LookupFileId volume id %s: %v", vid, err)
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}
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locations := vid2Locations[vid]
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if locations == nil || len(locations.Locations) == 0 {
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glog.V(1).Infof("LookupFileId locate volume id %s: %v", vid, err)
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return nil, fmt.Errorf("LookupFileId locate volume id %s: %v", vid, err)
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}
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for _, loc := range locations.Locations {
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fileUrls = append(fileUrls, fmt.Sprintf("http://%s/%s", loc.Url, part))
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}
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return
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}
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func (fs *FilerSource) ReadPart(fileId string) (filename string, header http.Header, resp *http.Response, err error) {
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if fs.proxyByFiler {
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return util.DownloadFile("http://" + fs.address + "/?proxyChunkId=" + fileId)
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}
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fileUrls, err := fs.LookupFileId(fileId)
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if err != nil {
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return "", nil, nil, err
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}
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for _, fileUrl := range fileUrls {
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filename, header, resp, err = util.DownloadFile(fileUrl)
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if err != nil {
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glog.V(1).Infof("fail to read from %s: %v", fileUrl, err)
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} else {
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break
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}
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}
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return filename, header, resp, err
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}
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var _ = filer_pb.FilerClient(&FilerSource{})
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func (fs *FilerSource) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
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return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
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client := filer_pb.NewSeaweedFilerClient(grpcConnection)
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return fn(client)
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}, fs.grpcAddress, fs.grpcDialOption)
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}
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func volumeId(fileId string) string {
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lastCommaIndex := strings.LastIndex(fileId, ",")
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if lastCommaIndex > 0 {
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return fileId[:lastCommaIndex]
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}
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return fileId
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}
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