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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 (
"bytes"
"context"
"encoding/json"
"fmt"
"path"
"path/filepath"
"time"
"github.com/BurntSushi/toml"
"github.com/pingcap/errors"
"github.com/pingcap/tiup/pkg/cluster/api"
"github.com/pingcap/tiup/pkg/cluster/spec"
"github.com/pingcap/tiup/pkg/utils"
)
func getFlashClusterPath(dir string) string {
return fmt.Sprintf("%s/flash_cluster_manager", dir)
}
type scheduleConfig struct {
LowSpaceRatio float64 `json:"low-space-ratio"`
}
type replicateMaxReplicaConfig struct {
MaxReplicas int `json:"max-replicas"`
}
type replicateEnablePlacementRulesConfig struct {
EnablePlacementRules string `json:"enable-placement-rules"`
}
// startOld is for < 7.1.0. Not maintained any more. Do not introduce new features.
func (inst *TiFlashInstance) startOld(ctx context.Context, version utils.Version) error {
endpoints := pdEndpoints(inst.pds, false)
tidbStatusAddrs := make([]string, 0, len(inst.dbs))
for _, db := range inst.dbs {
tidbStatusAddrs = append(tidbStatusAddrs, utils.JoinHostPort(AdvertiseHost(db.Host), db.StatusPort))
}
wd, err := filepath.Abs(inst.Dir)
if err != nil {
return err
}
// Wait for PD
pdClient := api.NewPDClient(ctx, endpoints, 10*time.Second, nil)
// set low-space-ratio to 1 to avoid low disk space
lowSpaceRatio, err := json.Marshal(scheduleConfig{
LowSpaceRatio: 0.99,
})
if err != nil {
return err
}
if err = pdClient.UpdateScheduleConfig(bytes.NewBuffer(lowSpaceRatio)); err != nil {
return err
}
// Update maxReplicas before placement rules so that it would not be overwritten
maxReplicas, err := json.Marshal(replicateMaxReplicaConfig{
MaxReplicas: 1,
})
if err != nil {
return err
}
if err = pdClient.UpdateReplicateConfig(bytes.NewBuffer(maxReplicas)); err != nil {
return err
}
// Set enable-placement-rules to allow TiFlash work properly
enablePlacementRules, err := json.Marshal(replicateEnablePlacementRulesConfig{
EnablePlacementRules: "true",
})
if err != nil {
return err
}
if err = pdClient.UpdateReplicateConfig(bytes.NewBuffer(enablePlacementRules)); err != nil {
return err
}
dirPath := filepath.Dir(inst.BinPath)
clusterManagerPath := getFlashClusterPath(dirPath)
if err = inst.checkConfigOld(wd, clusterManagerPath, version, tidbStatusAddrs, endpoints); err != nil {
return err
}
args := []string{
"server",
fmt.Sprintf("--config-file=%s", inst.ConfigPath),
}
envs := []string{
fmt.Sprintf("LD_LIBRARY_PATH=%s:$LD_LIBRARY_PATH", dirPath),
}
inst.Process = &process{cmd: PrepareCommand(ctx, inst.BinPath, args, envs, inst.Dir)}
logIfErr(inst.Process.SetOutputFile(inst.LogFile()))
return inst.Process.Start()
}
// checkConfigOld is for < 7.1.0. Not maintained any more. Do not introduce new features.
func (inst *TiFlashInstance) checkConfigOld(deployDir, clusterManagerPath string,
version utils.Version, tidbStatusAddrs, endpoints []string) (err error) {
if err := utils.MkdirAll(inst.Dir, 0755); err != nil {
return errors.Trace(err)
}
var (
flashBuf = new(bytes.Buffer)
proxyBuf = new(bytes.Buffer)
flashCfgPath = path.Join(inst.Dir, "tiflash.toml")
proxyCfgPath = path.Join(inst.Dir, "tiflash-learner.toml")
)
defer func() {
if err != nil {
return
}
if err = utils.WriteFile(flashCfgPath, flashBuf.Bytes(), 0644); err != nil {
return
}
if err = utils.WriteFile(proxyCfgPath, proxyBuf.Bytes(), 0644); err != nil {
return
}
inst.ConfigPath = flashCfgPath
}()
// Write default config to buffer
if err := writeTiFlashConfigOld(flashBuf, version, inst.tcpPort, inst.Port, inst.servicePort, inst.StatusPort,
inst.Host, deployDir, clusterManagerPath, tidbStatusAddrs, endpoints); err != nil {
return errors.Trace(err)
}
if err := writeTiFlashProxyConfigOld(proxyBuf, version, inst.Host, deployDir,
inst.servicePort, inst.proxyPort, inst.proxyStatusPort); err != nil {
return errors.Trace(err)
}
if inst.ConfigPath == "" {
return
}
cfg, err := unmarshalConfig(inst.ConfigPath)
if err != nil {
return errors.Trace(err)
}
proxyPath := getTiFlashProxyConfigPathOld(cfg)
if proxyPath != "" {
proxyCfg, err := unmarshalConfig(proxyPath)
if err != nil {
return errors.Trace(err)
}
err = overwriteBuf(proxyBuf, proxyCfg)
if err != nil {
return errors.Trace(err)
}
}
// Always use the tiflash proxy config file in the instance directory
setTiFlashProxyConfigPathOld(cfg, proxyCfgPath)
return errors.Trace(overwriteBuf(flashBuf, cfg))
}
func overwriteBuf(buf *bytes.Buffer, overwrite map[string]any) (err error) {
cfg := make(map[string]any)
if err = toml.Unmarshal(buf.Bytes(), &cfg); err != nil {
return
}
buf.Reset()
return toml.NewEncoder(buf).Encode(spec.MergeConfig(cfg, overwrite))
}
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