lightning: fix pd http request using old address (pingcap#45680)

close pingcap#43436

br/pkg/lightning/backend/local/local.go

@@ -268,15 +268,15 @@ func (*encodingBuilder) MakeEmptyRows() encode.Rows {
 type targetInfoGetter struct {
 	tls      *common.TLS
 	targetDB *sql.DB
-	pdAddr   string
+	pdCli    pd.Client
 }
 
 // NewTargetInfoGetter creates an TargetInfoGetter with local backend implementation.
-func NewTargetInfoGetter(tls *common.TLS, db *sql.DB, pdAddr string) backend.TargetInfoGetter {
+func NewTargetInfoGetter(tls *common.TLS, db *sql.DB, pdCli pd.Client) backend.TargetInfoGetter {
 	return &targetInfoGetter{
 		tls:      tls,
 		targetDB: db,
-		pdAddr:   pdAddr,
+		pdCli:    pdCli,
 	}
 }
 
@@ -297,10 +297,10 @@ func (g *targetInfoGetter) CheckRequirements(ctx context.Context, checkCtx *back
 	if err := checkTiDBVersion(ctx, versionStr, localMinTiDBVersion, localMaxTiDBVersion); err != nil {
 		return err
 	}
-	if err := tikv.CheckPDVersion(ctx, g.tls, g.pdAddr, localMinPDVersion, localMaxPDVersion); err != nil {
+	if err := tikv.CheckPDVersion(ctx, g.tls, g.pdCli.GetLeaderAddr(), localMinPDVersion, localMaxPDVersion); err != nil {
 		return err
 	}
-	if err := tikv.CheckTiKVVersion(ctx, g.tls, g.pdAddr, localMinTiKVVersion, localMaxTiKVVersion); err != nil {
+	if err := tikv.CheckTiKVVersion(ctx, g.tls, g.pdCli.GetLeaderAddr(), localMinTiKVVersion, localMaxTiKVVersion); err != nil {
 		return err
 	}
 
@@ -1719,7 +1719,7 @@ func (local *Backend) LocalWriter(_ context.Context, cfg *backend.LocalWriterCon
 // This function will spawn a goroutine to keep switch mode periodically until the context is done.
 // The return done channel is used to notify the caller that the background goroutine is exited.
 func (local *Backend) SwitchModeByKeyRanges(ctx context.Context, ranges []Range) (<-chan struct{}, error) {
-	switcher := NewTiKVModeSwitcher(local.tls, local.PDAddr, log.FromContext(ctx).Logger)
+	switcher := NewTiKVModeSwitcher(local.tls, local.pdCtl.GetPDClient(), log.FromContext(ctx).Logger)
 	done := make(chan struct{})
 
 	keyRanges := make([]*sst.Range, 0, len(ranges))

br/pkg/lightning/backend/local/tikv_mode.go

@@ -20,6 +20,7 @@ import (
 	sstpb "github.com/pingcap/kvproto/pkg/import_sstpb"
 	"github.com/pingcap/tidb/br/pkg/lightning/common"
 	"github.com/pingcap/tidb/br/pkg/lightning/tikv"
+	pd "github.com/tikv/pd/client"
 	"go.uber.org/zap"
 )
 
@@ -34,15 +35,15 @@ type TiKVModeSwitcher interface {
 // TiKVModeSwitcher is used to switch TiKV nodes between Import and Normal mode.
 type switcher struct {
 	tls    *common.TLS
-	pdAddr string
+	pdCli  pd.Client
 	logger *zap.Logger
 }
 
 // NewTiKVModeSwitcher creates a new TiKVModeSwitcher.
-func NewTiKVModeSwitcher(tls *common.TLS, pdAddr string, logger *zap.Logger) TiKVModeSwitcher {
+func NewTiKVModeSwitcher(tls *common.TLS, pdCli pd.Client, logger *zap.Logger) TiKVModeSwitcher {
 	return &switcher{
 		tls:    tls,
-		pdAddr: pdAddr,
+		pdCli:  pdCli,
 		logger: logger,
 	}
 }
@@ -68,7 +69,7 @@ func (rc *switcher) switchTiKVMode(ctx context.Context, mode sstpb.SwitchMode, r
 	} else {
 		minState = tikv.StoreStateDisconnected
 	}
-	tls := rc.tls.WithHost(rc.pdAddr)
+	tls := rc.tls.WithHost(rc.pdCli.GetLeaderAddr())
 	// we ignore switch mode failure since it is not fatal.
 	// no need log the error, it is done in kv.SwitchMode already.
 	_ = tikv.ForAllStores(

br/pkg/lightning/importer/BUILD.bazel

@@ -175,6 +175,8 @@ go_test(
         "@com_github_stretchr_testify//require",
         "@com_github_stretchr_testify//suite",
         "@com_github_tikv_client_go_v2//config",
+        "@com_github_tikv_client_go_v2//testutils",
+        "@com_github_tikv_pd_client//:client",
         "@com_github_xitongsys_parquet_go//writer",
         "@com_github_xitongsys_parquet_go_source//buffer",
         "@io_etcd_go_etcd_client_v3//:client",

br/pkg/lightning/importer/checksum_helper.go

@@ -26,7 +26,6 @@ import (
 	"github.com/pingcap/tidb/br/pkg/lightning/metric"
 	"github.com/pingcap/tidb/br/pkg/pdutil"
 	"github.com/pingcap/tidb/kv"
-	pd "github.com/tikv/pd/client"
 	"go.uber.org/zap"
 )
 
@@ -37,21 +36,14 @@ func NewChecksumManager(ctx context.Context, rc *Controller, store kv.Storage) (
 		return nil, nil
 	}
 
-	pdAddr := rc.cfg.TiDB.PdAddr
-	pdVersion, err := pdutil.FetchPDVersion(ctx, rc.tls, pdAddr)
+	pdVersion, err := pdutil.FetchPDVersion(ctx, rc.tls, rc.pdCli.GetLeaderAddr())
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
 
 	// for v4.0.0 or upper, we can use the gc ttl api
 	var manager local.ChecksumManager
 	if pdVersion.Major >= 4 && !rc.cfg.PostRestore.ChecksumViaSQL {
-		tlsOpt := rc.tls.ToPDSecurityOption()
-		pdCli, err := pd.NewClientWithContext(ctx, []string{pdAddr}, tlsOpt)
-		if err != nil {
-			return nil, errors.Trace(err)
-		}
-
 		backoffWeight, err := common.GetBackoffWeightFromDB(ctx, rc.db)
 		// only set backoff weight when it's smaller than default value
 		if err == nil && backoffWeight >= local.DefaultBackoffWeight {
@@ -66,7 +58,7 @@ func NewChecksumManager(ctx context.Context, rc *Controller, store kv.Storage) (
 			log.FromContext(ctx).Warn("get tidb_request_source_type failed", zap.Error(err), zap.String("tidb_request_source_type", explicitRequestSourceType))
 			return nil, errors.Trace(err)
 		}
-		manager = local.NewTiKVChecksumManager(store.GetClient(), pdCli, uint(rc.cfg.TiDB.DistSQLScanConcurrency), backoffWeight, rc.resourceGroupName, explicitRequestSourceType)
+		manager = local.NewTiKVChecksumManager(store.GetClient(), rc.pdCli, uint(rc.cfg.TiDB.DistSQLScanConcurrency), backoffWeight, rc.resourceGroupName, explicitRequestSourceType)
 	} else {
 		manager = local.NewTiDBChecksumExecutor(rc.db)
 	}

br/pkg/lightning/importer/get_pre_info.go

@@ -50,6 +50,7 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/util/dbterror"
 	"github.com/pingcap/tidb/util/mock"
+	pd "github.com/tikv/pd/client"
 	"go.uber.org/zap"
 	"golang.org/x/exp/maps"
 )
@@ -123,12 +124,14 @@ type TargetInfoGetterImpl struct {
 	db      *sql.DB
 	tls     *common.TLS
 	backend backend.TargetInfoGetter
+	pdCli   pd.Client
 }
 
 // NewTargetInfoGetterImpl creates a TargetInfoGetterImpl object.
 func NewTargetInfoGetterImpl(
 	cfg *config.Config,
 	targetDB *sql.DB,
+	pdCli pd.Client,
 ) (*TargetInfoGetterImpl, error) {
 	tls, err := cfg.ToTLS()
 	if err != nil {
@@ -139,7 +142,10 @@ func NewTargetInfoGetterImpl(
 	case config.BackendTiDB:
 		backendTargetInfoGetter = tidb.NewTargetInfoGetter(targetDB)
 	case config.BackendLocal:
-		backendTargetInfoGetter = local.NewTargetInfoGetter(tls, targetDB, cfg.TiDB.PdAddr)
+		if pdCli == nil {
+			return nil, common.ErrUnknown.GenWithStack("pd client is required when using local backend")
+		}
+		backendTargetInfoGetter = local.NewTargetInfoGetter(tls, targetDB, pdCli)
 	default:
 		return nil, common.ErrUnknownBackend.GenWithStackByArgs(cfg.TikvImporter.Backend)
 	}
@@ -148,6 +154,7 @@ func NewTargetInfoGetterImpl(
 		tls:     tls,
 		db:      targetDB,
 		backend: backendTargetInfoGetter,
+		pdCli:   pdCli,
 	}, nil
 }
 
@@ -229,7 +236,7 @@ func (g *TargetInfoGetterImpl) GetTargetSysVariablesForImport(ctx context.Contex
 // It uses the PD interface through TLS to get the information.
 func (g *TargetInfoGetterImpl) GetReplicationConfig(ctx context.Context) (*pdtypes.ReplicationConfig, error) {
 	result := new(pdtypes.ReplicationConfig)
-	if err := g.tls.WithHost(g.cfg.TiDB.PdAddr).GetJSON(ctx, pdReplicate, &result); err != nil {
+	if err := g.tls.WithHost(g.pdCli.GetLeaderAddr()).GetJSON(ctx, pdReplicate, &result); err != nil {
 		return nil, errors.Trace(err)
 	}
 	return result, nil
@@ -240,7 +247,7 @@ func (g *TargetInfoGetterImpl) GetReplicationConfig(ctx context.Context) (*pdtyp
 // It uses the PD interface through TLS to get the information.
 func (g *TargetInfoGetterImpl) GetStorageInfo(ctx context.Context) (*pdtypes.StoresInfo, error) {
 	result := new(pdtypes.StoresInfo)
-	if err := g.tls.WithHost(g.cfg.TiDB.PdAddr).GetJSON(ctx, pdStores, result); err != nil {
+	if err := g.tls.WithHost(g.pdCli.GetLeaderAddr()).GetJSON(ctx, pdStores, result); err != nil {
 		return nil, errors.Trace(err)
 	}
 	return result, nil
@@ -251,7 +258,7 @@ func (g *TargetInfoGetterImpl) GetStorageInfo(ctx context.Context) (*pdtypes.Sto
 // It uses the PD interface through TLS to get the information.
 func (g *TargetInfoGetterImpl) GetEmptyRegionsInfo(ctx context.Context) (*pdtypes.RegionsInfo, error) {
 	result := new(pdtypes.RegionsInfo)
-	if err := g.tls.WithHost(g.cfg.TiDB.PdAddr).GetJSON(ctx, pdEmptyRegions, &result); err != nil {
+	if err := g.tls.WithHost(g.pdCli.GetLeaderAddr()).GetJSON(ctx, pdEmptyRegions, &result); err != nil {
 		return nil, errors.Trace(err)
 	}
 	return result, nil

br/pkg/lightning/importer/get_pre_info_test.go

@@ -757,7 +757,10 @@ func TestGetPreInfoIsTableEmpty(t *testing.T) {
 	require.NoError(t, err)
 	lnConfig := config.NewConfig()
 	lnConfig.TikvImporter.Backend = config.BackendLocal
-	targetGetter, err := NewTargetInfoGetterImpl(lnConfig, db)
+	_, err = NewTargetInfoGetterImpl(lnConfig, db, nil)
+	require.ErrorContains(t, err, "pd client is required when using local backend")
+	lnConfig.TikvImporter.Backend = config.BackendTiDB
+	targetGetter, err := NewTargetInfoGetterImpl(lnConfig, db, nil)
 	require.NoError(t, err)
 	require.Equal(t, lnConfig, targetGetter.cfg)
 

br/pkg/lightning/importer/import.go

@@ -200,6 +200,7 @@ type Controller struct {
 	engineMgr     backend.EngineManager
 	backend       backend.Backend
 	db            *sql.DB
+	pdCli         pd.Client
 
 	alterTableLock sync.Mutex
 	sysVars        map[string]string
@@ -333,6 +334,7 @@ func NewImportControllerWithPauser(
 
 	var encodingBuilder encode.EncodingBuilder
 	var backendObj backend.Backend
+	var pdCli pd.Client
 	switch cfg.TikvImporter.Backend {
 	case config.BackendTiDB:
 		encodingBuilder = tidb.NewEncodingBuilder()
@@ -348,9 +350,13 @@ func NewImportControllerWithPauser(
 		if maxOpenFiles < 0 {
 			maxOpenFiles = math.MaxInt32
 		}
+		pdCli, err = pd.NewClientWithContext(ctx, []string{cfg.TiDB.PdAddr}, tls.ToPDSecurityOption())
+		if err != nil {
+			return nil, errors.Trace(err)
+		}
 
 		if cfg.TikvImporter.DuplicateResolution != config.DupeResAlgNone {
-			if err := tikv.CheckTiKVVersion(ctx, tls, cfg.TiDB.PdAddr, minTiKVVersionForDuplicateResolution, maxTiKVVersionForDuplicateResolution); err != nil {
+			if err := tikv.CheckTiKVVersion(ctx, tls, pdCli.GetLeaderAddr(), minTiKVVersionForDuplicateResolution, maxTiKVVersionForDuplicateResolution); err != nil {
 				if !berrors.Is(err, berrors.ErrVersionMismatch) {
 					return nil, common.ErrCheckKVVersion.Wrap(err).GenWithStackByArgs()
 				}
@@ -419,7 +425,7 @@ func NewImportControllerWithPauser(
 
 	var wrapper backend.TargetInfoGetter
 	if cfg.TikvImporter.Backend == config.BackendLocal {
-		wrapper = local.NewTargetInfoGetter(tls, db, cfg.TiDB.PdAddr)
+		wrapper = local.NewTargetInfoGetter(tls, db, pdCli)
 	} else {
 		wrapper = tidb.NewTargetInfoGetter(db)
 	}
@@ -429,6 +435,7 @@ func NewImportControllerWithPauser(
 		db:      db,
 		tls:     tls,
 		backend: wrapper,
+		pdCli:   pdCli,
 	}
 	preInfoGetter, err := NewPreImportInfoGetter(
 		cfg,
@@ -458,6 +465,7 @@ func NewImportControllerWithPauser(
 		pauser:        p.Pauser,
 		engineMgr:     backend.MakeEngineManager(backendObj),
 		backend:       backendObj,
+		pdCli:         pdCli,
 		db:            db,
 		sysVars:       common.DefaultImportantVariables,
 		tls:           tls,
@@ -482,7 +490,7 @@ func NewImportControllerWithPauser(
 		preInfoGetter:       preInfoGetter,
 		precheckItemBuilder: preCheckBuilder,
 		encBuilder:          encodingBuilder,
-		tikvModeSwitcher:    local.NewTiKVModeSwitcher(tls, cfg.TiDB.PdAddr, log.FromContext(ctx).Logger),
+		tikvModeSwitcher:    local.NewTiKVModeSwitcher(tls, pdCli, log.FromContext(ctx).Logger),
 
 		keyspaceName:      p.KeyspaceName,
 		resourceGroupName: p.ResourceGroupName,
@@ -495,6 +503,9 @@ func NewImportControllerWithPauser(
 func (rc *Controller) Close() {
 	rc.backend.Close()
 	_ = rc.db.Close()
+	if rc.pdCli != nil {
+		rc.pdCli.Close()
+	}
 }
 
 // Run starts the restore task.
@@ -1870,7 +1881,7 @@ func (rc *Controller) fullCompact(ctx context.Context) error {
 }
 
 func (rc *Controller) doCompact(ctx context.Context, level int32) error {
-	tls := rc.tls.WithHost(rc.cfg.TiDB.PdAddr)
+	tls := rc.tls.WithHost(rc.pdCli.GetLeaderAddr())
 	return tikv.ForAllStores(
 		ctx,
 		tls,

br/pkg/lightning/importer/precheck.go

@@ -9,6 +9,7 @@ import (
 	ropts "github.com/pingcap/tidb/br/pkg/lightning/importer/opts"
 	"github.com/pingcap/tidb/br/pkg/lightning/mydump"
 	"github.com/pingcap/tidb/br/pkg/lightning/precheck"
+	pd "github.com/tikv/pd/client"
 )
 
 type precheckContextKey string
@@ -29,7 +30,8 @@ type PrecheckItemBuilder struct {
 }
 
 // NewPrecheckItemBuilderFromConfig creates a new PrecheckItemBuilder from config
-func NewPrecheckItemBuilderFromConfig(ctx context.Context, cfg *config.Config, opts ...ropts.PrecheckItemBuilderOption) (*PrecheckItemBuilder, error) {
+// pdCli **must not** be nil for local backend
+func NewPrecheckItemBuilderFromConfig(ctx context.Context, cfg *config.Config, pdCli pd.Client, opts ...ropts.PrecheckItemBuilderOption) (*PrecheckItemBuilder, error) {
 	var gerr error
 	builderCfg := new(ropts.PrecheckItemBuilderConfig)
 	for _, o := range opts {
@@ -39,7 +41,7 @@ func NewPrecheckItemBuilderFromConfig(ctx context.Context, cfg *config.Config, o
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
-	targetInfoGetter, err := NewTargetInfoGetterImpl(cfg, targetDB)
+	targetInfoGetter, err := NewTargetInfoGetterImpl(cfg, targetDB, pdCli)
 	if err != nil {
 		return nil, errors.Trace(err)
 	}