116 lines
3.3 KiB
Go
116 lines
3.3 KiB
Go
/*
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* Copyright 2024 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package pex
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import (
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"errors"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/peer"
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"google.golang.org/grpc/status"
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dfdaemonv1 "d7y.io/api/v2/pkg/apis/dfdaemon/v1"
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logger "d7y.io/dragonfly/v2/internal/dflog"
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"d7y.io/dragonfly/v2/pkg/retry"
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)
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func (p *peerExchange) PeerExchange(exchangeServer dfdaemonv1.Daemon_PeerExchangeServer) error {
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ctx := exchangeServer.Context()
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pr, ok := peer.FromContext(ctx)
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if !ok {
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logger.Errorf("grpc peer info not found")
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return status.Error(codes.InvalidArgument, "grpc peer info not found")
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}
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md, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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logger.Errorf("grpc metadata not found")
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return status.Error(codes.InvalidArgument, "grpc metadata not found")
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}
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hostIDs := md.Get(GRPCMetadataHostID)
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if len(hostIDs) < 1 {
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logger.Errorf("grpc metadata HostID not found")
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return status.Error(codes.InvalidArgument, "grpc metadata HostID not found")
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}
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hostID := hostIDs[0]
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log := logger.With("member", pr.Addr.String(), "hostID", p.localMember.HostID, "targetHostID", hostID, "grpcCall", "PeerExchange")
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// try to find member
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var member *MemberMeta
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_, _, err := retry.Run(ctx, 0.01, 0.1, 10, func() (data any, cancel bool, err error) {
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member, err = p.PeerExchangeMember().FindMember(hostID)
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if errors.Is(err, ErrNotFound) {
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log.Errorf("%s member not found, retry later", hostID)
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select {
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case <-ctx.Done():
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cancel = true
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default:
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}
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return member, cancel, status.Error(codes.NotFound, "member not found")
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}
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return member, cancel, nil
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})
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if err != nil {
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log.Errorf("failed to extract peer info: %s", err)
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return status.Errorf(codes.InvalidArgument, "failed to extract peer info: %s", err)
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}
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err = p.PeerExchangeMember().Register(member,
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NewPeerMetadataSendReceiveCloser(
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exchangeServer,
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func() error {
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return nil
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},
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),
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)
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if IsErrAlreadyExists(err) {
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log.Infof("member is already exist")
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return status.Error(codes.AlreadyExists, err.Error())
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}
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if err != nil {
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log.Debugf("failed to register member: %s", err)
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return status.Errorf(codes.Internal, "failed to register member: %s", err)
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}
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defer p.PeerExchangeMember().UnRegister(member)
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log.Infof("receive connection from %s/%s, start receive peer metadata, member metadata: %#v",
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member.HostID, member.IP, member)
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// TODO send exist peers
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var data *dfdaemonv1.PeerExchangeData
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for {
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data, err = exchangeServer.Recv()
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if err != nil {
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if !IsErrAlreadyExists(err) {
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log.Errorf("failed to receive peer metadata: %s, member: %s, local host id: %s",
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err, member.HostID, p.localMember.HostID)
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}
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return err
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}
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p.PeerExchangeSynchronizer().Sync(member, data)
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}
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}
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