refactor

weed/admin/dash/client_management.go

@@ -0,0 +1,96 @@
+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()
+}