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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"
"net/http"
"path/filepath"
"strings"
"time"
"github.com/pingcap/tiup/pkg/utils"
)
// Pump represent a pump instance.
type Pump struct {
instance
pds []*PDInstance
Process
}
var _ Instance = &Pump{}
// NewPump create a Pump instance.
func NewPump(shOpt SharedOptions, binPath string, dir, host, configPath string, id int, pds []*PDInstance) *Pump {
pump := &Pump{
instance: instance{
BinPath: binPath,
ID: id,
Dir: dir,
Host: host,
Port: utils.MustGetFreePort(host, 8249, shOpt.PortOffset),
ConfigPath: configPath,
},
pds: pds,
}
pump.StatusPort = pump.Port
return pump
}
// NodeID return the node id of pump.
func (p *Pump) NodeID() string {
return fmt.Sprintf("pump_%d", p.ID)
}
// Ready return nil when pump is ready to serve.
func (p *Pump) Ready(ctx context.Context) error {
url := fmt.Sprintf("http://%s/status", utils.JoinHostPort(p.Host, p.Port))
ready := func() bool {
resp, err := http.Get(url)
if err != nil {
return false
}
defer resp.Body.Close()
return resp.StatusCode == 200
}
for {
if ready() {
return nil
}
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(time.Second):
// just retry
}
}
}
// Addr return the address of Pump.
func (p *Pump) Addr() string {
return utils.JoinHostPort(AdvertiseHost(p.Host), p.Port)
}
// Start implements Instance interface.
func (p *Pump) Start(ctx context.Context) error {
endpoints := pdEndpoints(p.pds, true)
args := []string{
fmt.Sprintf("--node-id=%s", p.NodeID()),
fmt.Sprintf("--addr=%s", utils.JoinHostPort(p.Host, p.Port)),
fmt.Sprintf("--advertise-addr=%s", utils.JoinHostPort(AdvertiseHost(p.Host), p.Port)),
fmt.Sprintf("--pd-urls=%s", strings.Join(endpoints, ",")),
fmt.Sprintf("--log-file=%s", p.LogFile()),
}
if p.ConfigPath != "" {
args = append(args, fmt.Sprintf("--config=%s", p.ConfigPath))
}
p.Process = &process{cmd: PrepareCommand(ctx, p.BinPath, args, nil, p.Dir)}
logIfErr(p.Process.SetOutputFile(p.LogFile()))
return p.Process.Start()
}
// Component return component name.
func (p *Pump) Component() string {
return "pump"
}
// LogFile return the log file.
func (p *Pump) LogFile() string {
return filepath.Join(p.Dir, "pump.log")
}
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