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package dash
import (
"context"
"fmt"
"time"
"github.com/seaweedfs/seaweedfs/weed/cluster"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/operation"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
)
// WithMasterClient executes a function with a master client connection
func (s *AdminServer) WithMasterClient(f func(client master_pb.SeaweedClient) error) error {
masterAddr := pb.ServerAddress(s.masterAddress)
return pb.WithMasterClient(false, masterAddr, s.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
return f(client)
})
}
// WithFilerClient executes a function with a filer client connection
func (s *AdminServer) WithFilerClient(f func(client filer_pb.SeaweedFilerClient) error) error {
filerAddr := s.GetFilerAddress()
if filerAddr == "" {
return fmt.Errorf("no filer available")
}
return pb.WithGrpcFilerClient(false, 0, pb.ServerAddress(filerAddr), s.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
return f(client)
})
}
// WithVolumeServerClient executes a function with a volume server client connection
func (s *AdminServer) WithVolumeServerClient(address pb.ServerAddress, f func(client volume_server_pb.VolumeServerClient) error) error {
return operation.WithVolumeServerClient(false, address, s.grpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
return f(client)
})
}
// GetFilerAddress returns a filer address, discovering from masters if needed
func (s *AdminServer) GetFilerAddress() string {
// Discover filers from masters
filers := s.getDiscoveredFilers()
if len(filers) > 0 {
return filers[0] // Return the first available filer
}
return ""
}
// getDiscoveredFilers returns cached filers or discovers them from masters
func (s *AdminServer) getDiscoveredFilers() []string {
// Check if cache is still valid
if time.Since(s.lastFilerUpdate) < s.filerCacheExpiration && len(s.cachedFilers) > 0 {
return s.cachedFilers
}
// Discover filers from masters
var filers []string
err := s.WithMasterClient(func(client master_pb.SeaweedClient) error {
resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
ClientType: cluster.FilerType,
})
if err != nil {
return err
}
for _, node := range resp.ClusterNodes {
filers = append(filers, node.Address)
}
return nil
})
if err != nil {
glog.Warningf("Failed to discover filers from master %s: %v", s.masterAddress, err)
// Return cached filers even if expired, better than nothing
return s.cachedFilers
}
// Update cache
s.cachedFilers = filers
s.lastFilerUpdate = time.Now()
return filers
}
// GetAllFilers returns all discovered filers
func (s *AdminServer) GetAllFilers() []string {
return s.getDiscoveredFilers()
}
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