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package s3api
import ( "github.com/seaweedfs/seaweedfs/weed/filer" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants" "github.com/seaweedfs/seaweedfs/weed/util" )
func (s3a *S3ApiServer) subscribeMetaEvents(clientName string, lastTsNs int64, prefix string, directoriesToWatch []string) {
processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
message := resp.EventNotification if message.NewEntry == nil { return nil }
dir := resp.Directory
if message.NewParentPath != "" { dir = message.NewParentPath } fileName := message.NewEntry.Name content := message.NewEntry.Content
_ = s3a.onIamConfigUpdate(dir, fileName, content) _ = s3a.onCircuitBreakerConfigUpdate(dir, fileName, content) _ = s3a.onBucketMetadataChange(dir, message.OldEntry, message.NewEntry)
return nil }
metadataFollowOption := &pb.MetadataFollowOption{ ClientName: clientName, ClientId: s3a.randomClientId, ClientEpoch: 1, SelfSignature: 0, PathPrefix: prefix, AdditionalPathPrefixes: nil, DirectoriesToWatch: directoriesToWatch, StartTsNs: lastTsNs, StopTsNs: 0, EventErrorType: pb.FatalOnError, } util.RetryUntil("followIamChanges", func() error { metadataFollowOption.ClientEpoch++ return pb.WithFilerClientFollowMetadata(s3a, metadataFollowOption, processEventFn) }, func(err error) bool { glog.V(0).Infof("iam follow metadata changes: %v", err) return true }) }
// reload iam config
func (s3a *S3ApiServer) onIamConfigUpdate(dir, filename string, content []byte) error { if dir == filer.IamConfigDirectory && filename == filer.IamIdentityFile { if err := s3a.iam.LoadS3ApiConfigurationFromBytes(content); err != nil { return err } glog.V(0).Infof("updated %s/%s", dir, filename) } return nil }
// reload circuit breaker config
func (s3a *S3ApiServer) onCircuitBreakerConfigUpdate(dir, filename string, content []byte) error { if dir == s3_constants.CircuitBreakerConfigDir && filename == s3_constants.CircuitBreakerConfigFile { if err := s3a.cb.LoadS3ApiConfigurationFromBytes(content); err != nil { return err } glog.V(0).Infof("updated %s/%s", dir, filename) } return nil }
// reload bucket metadata
func (s3a *S3ApiServer) onBucketMetadataChange(dir string, oldEntry *filer_pb.Entry, newEntry *filer_pb.Entry) error { if dir == s3a.option.BucketsPath { if newEntry != nil { s3a.bucketRegistry.LoadBucketMetadata(newEntry) glog.V(0).Infof("updated bucketMetadata %s/%s", dir, newEntry) } else { s3a.bucketRegistry.RemoveBucketMetadata(oldEntry) glog.V(0).Infof("remove bucketMetadata %s/%s", dir, newEntry) } } return nil }
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