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package weed_server
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/glog"
"time"
"github.com/seaweedfs/raft"
"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
"github.com/seaweedfs/seaweedfs/weed/security"
"github.com/seaweedfs/seaweedfs/weed/storage/needle"
"github.com/seaweedfs/seaweedfs/weed/storage/super_block"
"github.com/seaweedfs/seaweedfs/weed/storage/types"
"github.com/seaweedfs/seaweedfs/weed/topology"
)
func (ms *MasterServer) StreamAssign(server master_pb.Seaweed_StreamAssignServer) error {
for {
req, err := server.Recv()
if err != nil {
glog.Errorf("StreamAssign failed to receive: %v", err)
return err
}
resp, err := ms.Assign(context.Background(), req)
if err != nil {
glog.Errorf("StreamAssign failed to assign: %v", err)
return err
}
if err = server.Send(resp); err != nil {
glog.Errorf("StreamAssign failed to send: %v", err)
return err
}
}
}
func (ms *MasterServer) Assign(ctx context.Context, req *master_pb.AssignRequest) (*master_pb.AssignResponse, error) {
if !ms.Topo.IsLeader() {
return nil, raft.NotLeaderError
}
if req.Count == 0 {
req.Count = 1
}
if req.Replication == "" {
req.Replication = ms.option.DefaultReplicaPlacement
}
replicaPlacement, err := super_block.NewReplicaPlacementFromString(req.Replication)
if err != nil {
return nil, err
}
ttl, err := needle.ReadTTL(req.Ttl)
if err != nil {
return nil, err
}
diskType := types.ToDiskType(req.DiskType)
option := &topology.VolumeGrowOption{
Collection: req.Collection,
ReplicaPlacement: replicaPlacement,
Ttl: ttl,
DiskType: diskType,
Preallocate: ms.preallocateSize,
DataCenter: req.DataCenter,
Rack: req.Rack,
DataNode: req.DataNode,
MemoryMapMaxSizeMb: req.MemoryMapMaxSizeMb,
}
if !ms.Topo.DataCenterExists(option.DataCenter) {
return nil, fmt.Errorf("data center %v not found in topology", option.DataCenter)
}
vl := ms.Topo.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl, option.DiskType)
vl.SetLastGrowCount(req.WritableVolumeCount)
var (
lastErr error
maxTimeout = time.Second * 10
startTime = time.Now()
)
for time.Now().Sub(startTime) < maxTimeout {
fid, count, dnList, shouldGrow, err := ms.Topo.PickForWrite(req.Count, option, vl)
if shouldGrow && !vl.HasGrowRequest() {
// if picked volume is almost full, trigger a volume-grow request
if ms.Topo.AvailableSpaceFor(option) <= 0 {
return nil, fmt.Errorf("no free volumes left for " + option.String())
}
vl.AddGrowRequest()
ms.volumeGrowthRequestChan <- &topology.VolumeGrowRequest{
Option: option,
Count: req.WritableVolumeCount,
}
}
if err != nil {
// glog.Warningf("PickForWrite %+v: %v", req, err)
lastErr = err
time.Sleep(200 * time.Millisecond)
continue
}
dn := dnList.Head()
if dn == nil {
continue
}
var replicas []*master_pb.Location
for _, r := range dnList.Rest() {
replicas = append(replicas, &master_pb.Location{
Url: r.Url(),
PublicUrl: r.PublicUrl,
GrpcPort: uint32(r.GrpcPort),
DataCenter: r.GetDataCenterId(),
})
}
return &master_pb.AssignResponse{
Fid: fid,
Location: &master_pb.Location{
Url: dn.Url(),
PublicUrl: dn.PublicUrl,
GrpcPort: uint32(dn.GrpcPort),
DataCenter: dn.GetDataCenterId(),
},
Count: count,
Auth: string(security.GenJwtForVolumeServer(ms.guard.SigningKey, ms.guard.ExpiresAfterSec, fid)),
Replicas: replicas,
}, nil
}
return nil, lastErr
}
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