func getWeightedPeers(cluster Cluster) []*api.WeightedPeer {
members := cluster.GetMemberlist()
var mgrs []*api.WeightedPeer
for _, m := range members {
mgrs = append(mgrs, &api.WeightedPeer{
Peer: &api.Peer{
NodeID: identity.FormatNodeID(m.RaftID),
Addr: m.Addr,
},
Weight: 1,
})
}
return mgrs
}
// ResolveAddress returns the address reaching for a given node ID.
func (n *Node) ResolveAddress(ctx context.Context, msg *api.ResolveAddressRequest) (*api.ResolveAddressResponse, error) {
nodeInfo, err := ca.RemoteNode(ctx)
if err != nil {
return nil, err
}
fields := logrus.Fields{
"node.id": nodeInfo.NodeID,
"method": "(*Node).ResolveAddress",
}
if nodeInfo.ForwardedBy != nil {
fields["forwarder.id"] = nodeInfo.ForwardedBy.NodeID
}
log.G(ctx).WithFields(fields).Debugf("")
member := n.cluster.GetMember(msg.RaftID)
if member == nil {
return nil, grpc.Errorf(codes.NotFound, "member %s not found", identity.FormatNodeID(msg.RaftID))
}
return &api.ResolveAddressResponse{Addr: member.Addr}, nil
}
func (n *Node) sendToMember(members map[uint64]*membership.Member, m raftpb.Message) {
defer n.asyncTasks.Done()
if n.cluster.IsIDRemoved(m.To) {
// Should not send to removed members
return
}
ctx, cancel := context.WithTimeout(n.Ctx, n.sendTimeout)
defer cancel()
var (
conn *membership.Member
)
if toMember, ok := members[m.To]; ok {
conn = toMember
} else {
// If we are being asked to send to a member that's not in
// our member list, that could indicate that the current leader
// was added while we were offline. Try to resolve its address.
n.Config.Logger.Warningf("sending message to an unrecognized member ID %s", identity.FormatNodeID(m.To))
// Choose a random member
var (
queryMember *membership.Member
id uint64
)
for id, queryMember = range members {
if id != n.Config.ID {
break
}
}
if queryMember == nil {
n.Config.Logger.Error("could not find cluster member to query for leader address")
return
}
resp, err := queryMember.ResolveAddress(ctx, &api.ResolveAddressRequest{RaftID: m.To})
if err != nil {
n.Config.Logger.Errorf("could not resolve address of member ID %s: %v", identity.FormatNodeID(m.To), err)
return
}
conn, err = n.ConnectToMember(resp.Addr, n.sendTimeout)
if err != nil {
n.Config.Logger.Errorf("could connect to member ID %s at %s: %v", identity.FormatNodeID(m.To), resp.Addr, err)
return
}
// The temporary connection is only used for this message.
// Eventually, we should catch up and add a long-lived
// connection to the member list.
defer conn.Conn.Close()
}
_, err := conn.ProcessRaftMessage(ctx, &api.ProcessRaftMessageRequest{Message: &m})
if err != nil {
if grpc.ErrorDesc(err) == ErrMemberRemoved.Error() {
atomic.StoreUint32(&n.removed, 1)
}
if m.Type == raftpb.MsgSnap {
n.ReportSnapshot(m.To, raft.SnapshotFailure)
}
if n.Node == nil {
panic("node is nil")
}
n.ReportUnreachable(m.To)
} else if m.Type == raftpb.MsgSnap {
n.ReportSnapshot(m.To, raft.SnapshotFinish)
}
}