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// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package instance
import (
"context"
"fmt"
"path/filepath"
"strings"
"github.com/pingcap/tiup/pkg/utils"
)
// Drainer represent a drainer instance.
type Drainer struct {
instance
pds []*PDInstance
Process
}
var _ Instance = &Drainer{}
// NewDrainer create a Drainer instance.
func NewDrainer(shOpt SharedOptions, binPath string, dir, host, configPath string, id int, pds []*PDInstance) *Drainer {
d := &Drainer{
instance: instance{
BinPath: binPath,
ID: id,
Dir: dir,
Host: host,
Port: utils.MustGetFreePort(host, 8250, shOpt.PortOffset),
ConfigPath: configPath,
},
pds: pds,
}
d.StatusPort = d.Port
return d
}
// Component return component name.
func (d *Drainer) Component() string {
return "drainer"
}
// LogFile return the log file name.
func (d *Drainer) LogFile() string {
return filepath.Join(d.Dir, "drainer.log")
}
// Addr return the address of Drainer.
func (d *Drainer) Addr() string {
return utils.JoinHostPort(AdvertiseHost(d.Host), d.Port)
}
// NodeID return the node id of drainer.
func (d *Drainer) NodeID() string {
return fmt.Sprintf("drainer_%d", d.ID)
}
// Start implements Instance interface.
func (d *Drainer) Start(ctx context.Context) error {
endpoints := pdEndpoints(d.pds, true)
args := []string{
fmt.Sprintf("--node-id=%s", d.NodeID()),
fmt.Sprintf("--addr=%s", utils.JoinHostPort(d.Host, d.Port)),
fmt.Sprintf("--advertise-addr=%s", utils.JoinHostPort(AdvertiseHost(d.Host), d.Port)),
fmt.Sprintf("--pd-urls=%s", strings.Join(endpoints, ",")),
fmt.Sprintf("--log-file=%s", d.LogFile()),
}
if d.ConfigPath != "" {
args = append(args, fmt.Sprintf("--config=%s", d.ConfigPath))
}
d.Process = &process{cmd: PrepareCommand(ctx, d.BinPath, args, nil, d.Dir)}
logIfErr(d.Process.SetOutputFile(d.LogFile()))
return d.Process.Start()
}
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