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package weed_server
import (
"context"
"fmt"
"github.com/hashicorp/raft"
"github.com/seaweedfs/seaweedfs/weed/cluster"
"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
)
func (ms *MasterServer) RaftListClusterServers(ctx context.Context, req *master_pb.RaftListClusterServersRequest) (*master_pb.RaftListClusterServersResponse, error) {
resp := &master_pb.RaftListClusterServersResponse{}
ms.Topo.RaftServerAccessLock.RLock()
if ms.Topo.HashicorpRaft == nil {
ms.Topo.RaftServerAccessLock.RUnlock()
return resp, nil
}
servers := ms.Topo.HashicorpRaft.GetConfiguration().Configuration().Servers
_, leaderId := ms.Topo.HashicorpRaft.LeaderWithID()
ms.Topo.RaftServerAccessLock.RUnlock()
for _, server := range servers {
resp.ClusterServers = append(resp.ClusterServers, &master_pb.RaftListClusterServersResponse_ClusterServers{
Id: string(server.ID),
Address: string(server.Address),
Suffrage: server.Suffrage.String(),
IsLeader: server.ID == leaderId,
})
}
return resp, nil
}
func (ms *MasterServer) RaftAddServer(ctx context.Context, req *master_pb.RaftAddServerRequest) (*master_pb.RaftAddServerResponse, error) {
resp := &master_pb.RaftAddServerResponse{}
ms.Topo.RaftServerAccessLock.RLock()
defer ms.Topo.RaftServerAccessLock.RUnlock()
if ms.Topo.HashicorpRaft == nil {
return resp, nil
}
if ms.Topo.HashicorpRaft.State() != raft.Leader {
return nil, fmt.Errorf("raft add server %s failed: %s is no current leader", req.Id, ms.Topo.HashicorpRaft.String())
}
var idxFuture raft.IndexFuture
if req.Voter {
idxFuture = ms.Topo.HashicorpRaft.AddVoter(raft.ServerID(req.Id), raft.ServerAddress(req.Address), 0, 0)
} else {
idxFuture = ms.Topo.HashicorpRaft.AddNonvoter(raft.ServerID(req.Id), raft.ServerAddress(req.Address), 0, 0)
}
if err := idxFuture.Error(); err != nil {
return nil, err
}
return resp, nil
}
func (ms *MasterServer) RaftRemoveServer(ctx context.Context, req *master_pb.RaftRemoveServerRequest) (*master_pb.RaftRemoveServerResponse, error) {
resp := &master_pb.RaftRemoveServerResponse{}
ms.Topo.RaftServerAccessLock.RLock()
defer ms.Topo.RaftServerAccessLock.RUnlock()
if ms.Topo.HashicorpRaft == nil {
return resp, nil
}
if ms.Topo.HashicorpRaft.State() != raft.Leader {
return nil, fmt.Errorf("raft remove server %s failed: %s is no current leader", req.Id, ms.Topo.HashicorpRaft.String())
}
if !req.Force {
ms.clientChansLock.RLock()
_, ok := ms.clientChans[fmt.Sprintf("%s@%s", cluster.MasterType, req.Id)]
ms.clientChansLock.RUnlock()
if ok {
return resp, fmt.Errorf("raft remove server %s failed: client connection to master exists", req.Id)
}
}
idxFuture := ms.Topo.HashicorpRaft.RemoveServer(raft.ServerID(req.Id), 0, 0)
if err := idxFuture.Error(); err != nil {
return nil, err
}
return resp, nil
}
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