github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/ctl/master/offline_member.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  	"os"
    19  
    20  	"github.com/pingcap/errors"
    21  	"github.com/pingcap/tiflow/dm/ctl/common"
    22  	"github.com/pingcap/tiflow/dm/pb"
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  // NewOfflineMemberCmd creates an OfflineWorker command.
    27  func NewOfflineMemberCmd() *cobra.Command {
    28  	cmd := &cobra.Command{
    29  		Use:   "offline-member <--master/--worker> <--name master-name/worker-name>",
    30  		Short: "Offlines member which has been closed",
    31  		RunE:  offlineMemberFunc,
    32  	}
    33  	cmd.Flags().BoolP("master", "m", false, "to offline a master")
    34  	cmd.Flags().BoolP("worker", "w", false, "to offline a worker")
    35  	cmd.Flags().StringP("name", "n", "", "specify member name for choosing type")
    36  	return cmd
    37  }
    38  
    39  func convertOfflineMemberType(cmd *cobra.Command) (string, error) {
    40  	master, err := cmd.Flags().GetBool("master")
    41  	if err != nil {
    42  		return "", err
    43  	}
    44  	worker, err := cmd.Flags().GetBool("worker")
    45  	if err != nil {
    46  		return "", err
    47  	}
    48  	if (master && worker) || (!master && !worker) {
    49  		return "", errors.New("should specify either --master or --worker")
    50  	}
    51  	if master {
    52  		return common.Master, nil
    53  	}
    54  	return common.Worker, nil
    55  }
    56  
    57  // offlineMemberFunc does offline member request.
    58  func offlineMemberFunc(cmd *cobra.Command, _ []string) error {
    59  	if len(cmd.Flags().Args()) > 0 {
    60  		cmd.SetOut(os.Stdout)
    61  		common.PrintCmdUsage(cmd)
    62  		return errors.New("please check output to see error")
    63  	}
    64  
    65  	offlineType, err := convertOfflineMemberType(cmd)
    66  	if err != nil {
    67  		common.PrintLinesf("get offline type failed")
    68  		return err
    69  	}
    70  	name, err := cmd.Flags().GetString("name")
    71  	if err != nil {
    72  		common.PrintLinesf("get offline name failed")
    73  		return err
    74  	} else if name == "" {
    75  		common.PrintLinesf("a member name must be specified")
    76  		return errors.New("please check output to see error")
    77  	}
    78  	ctx, cancel := context.WithCancel(context.Background())
    79  	defer cancel()
    80  
    81  	resp := &pb.OfflineMemberResponse{}
    82  	err = common.SendRequest(
    83  		ctx,
    84  		"OfflineMember",
    85  		&pb.OfflineMemberRequest{
    86  			Type: offlineType,
    87  			Name: name,
    88  		},
    89  		&resp,
    90  	)
    91  
    92  	if err != nil {
    93  		return err
    94  	}
    95  	if !resp.Result {
    96  		common.PrintLinesf("offline member failed:\n%v", resp.Msg)
    97  		return errors.New("please check output to see error")
    98  	}
    99  	common.PrettyPrintResponse(resp)
   100  	return nil
   101  }