pitr: prevent from restore point to cluster running log backup (#40871)

br/pkg/backup/push.go

@@ -218,10 +218,9 @@ func (push *pushDown) pushBackup(
 					if len(errMsg) <= 0 {
 						errMsg = errPb.Msg
 					}
-					return errors.Annotatef(berrors.ErrKVStorage, "error happen in store %v at %s: %s %s",
+					return errors.Annotatef(berrors.ErrKVStorage, "error happen in store %v at %s: %s",
 						store.GetId(),
 						redact.String(store.GetAddress()),
-						req.StorageBackend.String(),
 						errMsg,
 					)
 				}

br/pkg/task/restore.go

@@ -474,10 +474,17 @@ func IsStreamRestore(cmdName string) bool {
 
 // RunRestore starts a restore task inside the current goroutine.
 func RunRestore(c context.Context, g glue.Glue, cmdName string, cfg *RestoreConfig) error {
+	if err := checkTaskExists(c, cfg); err != nil {
+		return errors.Annotate(err, "failed to check task exits")
+	}
+
 	if IsStreamRestore(cmdName) {
 		return RunStreamRestore(c, g, cmdName, cfg)
 	}
+	return runRestore(c, g, cmdName, cfg)
+}
 
+func runRestore(c context.Context, g glue.Glue, cmdName string, cfg *RestoreConfig) error {
 	cfg.Adjust()
 	defer summary.Summary(cmdName)
 	ctx, cancel := context.WithCancel(c)

br/pkg/task/stream.go

@@ -862,8 +862,8 @@ func RunStreamAdvancer(c context.Context, g glue.Glue, cmdName string, cfg *Stre
 	return nil
 }
 
-func checkConfigForStatus(cfg *StreamConfig) error {
-	if len(cfg.PD) == 0 {
+func checkConfigForStatus(pd []string) error {
+	if len(pd) == 0 {
 		return errors.Annotatef(berrors.ErrInvalidArgument,
 			"the command needs access to PD, please specify `-u` or `--pd`")
 	}
@@ -913,7 +913,7 @@ func RunStreamStatus(
 		ctx = opentracing.ContextWithSpan(ctx, span1)
 	}
 
-	if err := checkConfigForStatus(cfg); err != nil {
+	if err := checkConfigForStatus(cfg.PD); err != nil {
 		return err
 	}
 	ctl, err := makeStatusController(ctx, cfg, g)
@@ -1028,6 +1028,32 @@ func RunStreamTruncate(c context.Context, g glue.Glue, cmdName string, cfg *Stre
 	return nil
 }
 
+// checkTaskExists checks whether there is a log backup task running.
+// If so, return an error.
+func checkTaskExists(ctx context.Context, cfg *RestoreConfig) error {
+	if err := checkConfigForStatus(cfg.PD); err != nil {
+		return err
+	}
+	etcdCLI, err := dialEtcdWithCfg(ctx, cfg.Config)
+	if err != nil {
+		return err
+	}
+	cli := streamhelper.NewMetaDataClient(etcdCLI)
+	defer func() {
+		if err := cli.Close(); err != nil {
+			log.Error("failed to close the etcd client", zap.Error(err))
+		}
+	}()
+	tasks, err := cli.GetAllTasks(ctx)
+	if err != nil {
+		return err
+	}
+	if len(tasks) > 0 {
+		return errors.Errorf("log backup task is running: %s, please stop the task before restore, and after PITR operation finished, create log-backup task again and create a full backup on this cluster", tasks[0].Info.Name)
+	}
+	return nil
+}
+
 // RunStreamRestore restores stream log.
 func RunStreamRestore(
 	c context.Context,
@@ -1089,7 +1115,7 @@ func RunStreamRestore(
 		logStorage := cfg.Config.Storage
 		cfg.Config.Storage = cfg.FullBackupStorage
 		// TiFlash replica is restored to down-stream on 'pitr' currently.
-		if err = RunRestore(ctx, g, FullRestoreCmd, cfg); err != nil {
+		if err = runRestore(ctx, g, FullRestoreCmd, cfg); err != nil {
 			return errors.Trace(err)
 		}
 		cfg.Config.Storage = logStorage

br/tests/br_restore_log_task_enable/run.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+#
+# Copyright 2022 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,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eux
+DB="$TEST_NAME"
+TABLE="usertable"
+
+# start log task
+run_br log start --task-name 1234 -s "local://$TEST_DIR/$DB/log" --pd $PD_ADDR
+
+run_sql "CREATE DATABASE $DB;"
+run_sql "CREATE TABLE $DB.$TABLE (id int);"
+run_sql "INSERT INTO $DB.$TABLE VALUES (1), (2), (3);"
+
+# backup full
+run_br backup full -s "local://$TEST_DIR/$DB/full" --pd $PD_ADDR
+
+# clean db
+run_sql "DROP DATABASE $DB;"
+
+# restore full (should be failed)
+run_br restore full -s "local://$TEST_DIR/$DB/full" --pd $PD_ADDR && exit 1
+
+# restore point (should be failed)
+run_br restore point -s "local://$TEST_DIR/$DB/log" --pd $PD_ADDR && exit 1
+
+# pause log task
+run_br log pause --task-name 1234 --pd $PD_ADDR
+
+# restore full (should be failed)
+run_br restore full -s "local://$TEST_DIR/$DB/full" --pd $PD_ADDR && exit 1
+
+# restore point (should be failed)
+run_br restore point -s "local://$TEST_DIR/$DB/log" --pd $PD_ADDR && exit 1
+
+# stop log task
+run_br log stop --task-name 1234 --pd $PD_ADDR
+
+# restore full (should be success)
+run_br restore full -s "local://$TEST_DIR/$DB/full" --pd $PD_ADDR
+
+# clean db
+run_sql "DROP DATABASE $DB"