github.com/pingcap/tiup@v1.15.1/components/playground/instance/drainer.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 instance
    15  
    16  import (
    17  	"context"
    18  	"fmt"
    19  	"path/filepath"
    20  	"strings"
    21  
    22  	tiupexec "github.com/pingcap/tiup/pkg/exec"
    23  	"github.com/pingcap/tiup/pkg/utils"
    24  )
    25  
    26  // Drainer represent a drainer instance.
    27  type Drainer struct {
    28  	instance
    29  	pds []*PDInstance
    30  	Process
    31  }
    32  
    33  var _ Instance = &Drainer{}
    34  
    35  // NewDrainer create a Drainer instance.
    36  func NewDrainer(binPath string, dir, host, configPath string, id int, pds []*PDInstance) *Drainer {
    37  	d := &Drainer{
    38  		instance: instance{
    39  			BinPath:    binPath,
    40  			ID:         id,
    41  			Dir:        dir,
    42  			Host:       host,
    43  			Port:       utils.MustGetFreePort(host, 8250),
    44  			ConfigPath: configPath,
    45  		},
    46  		pds: pds,
    47  	}
    48  	d.StatusPort = d.Port
    49  	return d
    50  }
    51  
    52  // Component return component name.
    53  func (d *Drainer) Component() string {
    54  	return "drainer"
    55  }
    56  
    57  // LogFile return the log file name.
    58  func (d *Drainer) LogFile() string {
    59  	return filepath.Join(d.Dir, "drainer.log")
    60  }
    61  
    62  // Addr return the address of Drainer.
    63  func (d *Drainer) Addr() string {
    64  	return utils.JoinHostPort(AdvertiseHost(d.Host), d.Port)
    65  }
    66  
    67  // NodeID return the node id of drainer.
    68  func (d *Drainer) NodeID() string {
    69  	return fmt.Sprintf("drainer_%d", d.ID)
    70  }
    71  
    72  // Start implements Instance interface.
    73  func (d *Drainer) Start(ctx context.Context, version utils.Version) error {
    74  	endpoints := pdEndpoints(d.pds, true)
    75  
    76  	args := []string{
    77  		fmt.Sprintf("--node-id=%s", d.NodeID()),
    78  		fmt.Sprintf("--addr=%s", utils.JoinHostPort(d.Host, d.Port)),
    79  		fmt.Sprintf("--advertise-addr=%s", utils.JoinHostPort(AdvertiseHost(d.Host), d.Port)),
    80  		fmt.Sprintf("--pd-urls=%s", strings.Join(endpoints, ",")),
    81  		fmt.Sprintf("--log-file=%s", d.LogFile()),
    82  	}
    83  	if d.ConfigPath != "" {
    84  		args = append(args, fmt.Sprintf("--config=%s", d.ConfigPath))
    85  	}
    86  
    87  	var err error
    88  	if d.BinPath, err = tiupexec.PrepareBinary("drainer", version, d.BinPath); err != nil {
    89  		return err
    90  	}
    91  	d.Process = &process{cmd: PrepareCommand(ctx, d.BinPath, args, nil, d.Dir)}
    92  
    93  	logIfErr(d.Process.SetOutputFile(d.LogFile()))
    94  	return d.Process.Start()
    95  }