seaweedfs/weed/server/master_grpc_server_cluster.go

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package weed_server
import (
"context"
"github.com/seaweedfs/seaweedfs/weed/cluster"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
"math/rand"
)
func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.ListClusterNodesRequest) (*master_pb.ListClusterNodesResponse, error) {
resp := &master_pb.ListClusterNodesResponse{}
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filerGroup := cluster.FilerGroupName(req.FilerGroup)
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if req.IsLeaderOnly {
leaders := ms.Cluster.ListClusterNodeLeaders(filerGroup, req.ClientType)
for _, node := range leaders {
resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
Address: string(node),
IsLeader: true,
})
}
} else {
clusterNodes := ms.Cluster.ListClusterNode(filerGroup, req.ClientType)
clusterNodes = limitTo(clusterNodes, req.Limit)
for _, node := range clusterNodes {
resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
Address: string(node.Address),
Version: node.Version,
IsLeader: ms.Cluster.IsOneLeader(filerGroup, req.ClientType, node.Address),
CreatedAtNs: node.CreatedTs.UnixNano(),
DataCenter: string(node.DataCenter),
Rack: string(node.Rack),
})
}
}
return resp, nil
}
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func (ms *MasterServer) GetOneFiler(filerGroup cluster.FilerGroupName) pb.ServerAddress {
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clusterNodes := ms.Cluster.ListClusterNode(filerGroup, cluster.FilerType)
var filers []pb.ServerAddress
for _, node := range clusterNodes {
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if ms.Cluster.IsOneLeader(filerGroup, cluster.FilerType, node.Address) {
filers = append(filers, node.Address)
}
}
if len(filers) > 0 {
return filers[rand.Intn(len(filers))]
}
return "localhost:8888"
}
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func limitTo(nodes []*cluster.ClusterNode, limit int32) (selected []*cluster.ClusterNode) {
if limit <= 0 || len(nodes) < int(limit) {
return nodes
}
selectedSet := make(map[pb.ServerAddress]*cluster.ClusterNode)
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for i := 0; i < int(limit)*3; i++ {
x := rand.Intn(len(nodes))
if _, found := selectedSet[nodes[x].Address]; found {
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continue
}
selectedSet[nodes[x].Address] = nodes[x]
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}
for _, node := range selectedSet {
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selected = append(selected, node)
}
return
}