maintenance.go

Documentation: go.etcd.io/etcd/server/v3/proxy/grpcproxy

     1  // Copyright 2016 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package grpcproxy
    16  
    17  import (
    18  	"context"
    19  	"io"
    20  
    21  	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
    22  	"go.etcd.io/etcd/client/v3"
    23  )
    24  
    25  type maintenanceProxy struct {
    26  	client *clientv3.Client
    27  }
    28  
    29  func NewMaintenanceProxy(c *clientv3.Client) pb.MaintenanceServer {
    30  	return &maintenanceProxy{
    31  		client: c,
    32  	}
    33  }
    34  
    35  func (mp *maintenanceProxy) Defragment(ctx context.Context, dr *pb.DefragmentRequest) (*pb.DefragmentResponse, error) {
    36  	conn := mp.client.ActiveConnection()
    37  	return pb.NewMaintenanceClient(conn).Defragment(ctx, dr)
    38  }
    39  
    40  func (mp *maintenanceProxy) Snapshot(sr *pb.SnapshotRequest, stream pb.Maintenance_SnapshotServer) error {
    41  	conn := mp.client.ActiveConnection()
    42  	ctx, cancel := context.WithCancel(stream.Context())
    43  	defer cancel()
    44  
    45  	ctx = withClientAuthToken(ctx, stream.Context())
    46  
    47  	sc, err := pb.NewMaintenanceClient(conn).Snapshot(ctx, sr)
    48  	if err != nil {
    49  		return err
    50  	}
    51  
    52  	for {
    53  		rr, err := sc.Recv()
    54  		if err != nil {
    55  			if err == io.EOF {
    56  				return nil
    57  			}
    58  			return err
    59  		}
    60  		err = stream.Send(rr)
    61  		if err != nil {
    62  			return err
    63  		}
    64  	}
    65  }
    66  
    67  func (mp *maintenanceProxy) Hash(ctx context.Context, r *pb.HashRequest) (*pb.HashResponse, error) {
    68  	conn := mp.client.ActiveConnection()
    69  	return pb.NewMaintenanceClient(conn).Hash(ctx, r)
    70  }
    71  
    72  func (mp *maintenanceProxy) HashKV(ctx context.Context, r *pb.HashKVRequest) (*pb.HashKVResponse, error) {
    73  	conn := mp.client.ActiveConnection()
    74  	return pb.NewMaintenanceClient(conn).HashKV(ctx, r)
    75  }
    76  
    77  func (mp *maintenanceProxy) Alarm(ctx context.Context, r *pb.AlarmRequest) (*pb.AlarmResponse, error) {
    78  	conn := mp.client.ActiveConnection()
    79  	return pb.NewMaintenanceClient(conn).Alarm(ctx, r)
    80  }
    81  
    82  func (mp *maintenanceProxy) Status(ctx context.Context, r *pb.StatusRequest) (*pb.StatusResponse, error) {
    83  	conn := mp.client.ActiveConnection()
    84  	return pb.NewMaintenanceClient(conn).Status(ctx, r)
    85  }
    86  
    87  func (mp *maintenanceProxy) MoveLeader(ctx context.Context, r *pb.MoveLeaderRequest) (*pb.MoveLeaderResponse, error) {
    88  	conn := mp.client.ActiveConnection()
    89  	return pb.NewMaintenanceClient(conn).MoveLeader(ctx, r)
    90  }
    91  
    92  func (mp *maintenanceProxy) Downgrade(ctx context.Context, r *pb.DowngradeRequest) (*pb.DowngradeResponse, error) {
    93  	conn := mp.client.ActiveConnection()
    94  	return pb.NewMaintenanceClient(conn).Downgrade(ctx, r)
    95  }
    96
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