github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/ctl/master/operate_leader.go (about)

     1  // Copyright 2020 PingCAP, Inc.
     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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package master
    15  
    16  import (
    17  	"context"
    18  	"errors"
    19  	"os"
    20  
    21  	"github.com/pingcap/tiflow/dm/ctl/common"
    22  	"github.com/pingcap/tiflow/dm/pb"
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  // NewOperateLeaderCmd creates a OperateLeader command.
    27  func NewOperateLeaderCmd() *cobra.Command {
    28  	cmd := &cobra.Command{
    29  		Use:   "operate-leader <operate-type>",
    30  		Short: "`evict`/`cancel-evict` the leader",
    31  		RunE:  operateLeaderFunc,
    32  	}
    33  	return cmd
    34  }
    35  
    36  func convertOpType(op string) pb.LeaderOp {
    37  	switch op {
    38  	case "evict":
    39  		return pb.LeaderOp_EvictLeaderOp
    40  	case "cancel-evict":
    41  		return pb.LeaderOp_CancelEvictLeaderOp
    42  	default:
    43  		return pb.LeaderOp_InvalidLeaderOp
    44  	}
    45  }
    46  
    47  // operateLeaderFunc does operate leader request.
    48  func operateLeaderFunc(cmd *cobra.Command, _ []string) error {
    49  	if len(cmd.Flags().Args()) != 1 {
    50  		cmd.SetOut(os.Stdout)
    51  		common.PrintCmdUsage(cmd)
    52  		return errors.New("please check output to see error")
    53  	}
    54  
    55  	opType := cmd.Flags().Arg(0)
    56  
    57  	op := convertOpType(opType)
    58  	if op == pb.LeaderOp_InvalidLeaderOp {
    59  		common.PrintLinesf("invalid operate '%s' on leader", opType)
    60  		return errors.New("please check output to see error")
    61  	}
    62  
    63  	ctx, cancel := context.WithCancel(context.Background())
    64  	defer cancel()
    65  
    66  	// operate leader
    67  	resp := &pb.OperateLeaderResponse{}
    68  	err := common.SendRequest(
    69  		ctx,
    70  		"OperateLeader",
    71  		&pb.OperateLeaderRequest{
    72  			Op: op,
    73  		},
    74  		&resp,
    75  	)
    76  	if err != nil {
    77  		return err
    78  	}
    79  
    80  	common.PrettyPrintResponse(resp)
    81  	return nil
    82  }