[release-19.0] VReplication Workflow: set state correctly when restarting workflow streams in the copy phase (#16217)

go/vt/vttablet/tabletmanager/rpc_vreplication.go

@@ -18,6 +18,7 @@
 
 import (
 	"context"
+	"fmt"
 	"strings"
 
 	"google.golang.org/protobuf/encoding/prototext"
@@ -49,6 +50,8 @@
 	sqlSelectVReplicationWorkflowConfig = "select id, source, cell, tablet_types, state, message from %s.vreplication where workflow = %a"
 	// Update the configuration values for a workflow's vreplication stream.
 	sqlUpdateVReplicationWorkflowStreamConfig = "update %s.vreplication set state = %a, source = %a, cell = %a, tablet_types = %a where id = %a"
+	// Check if workflow is still copying.
+	sqlGetVReplicationCopyStatus = "select distinct vrepl_id from %s.copy_state where vrepl_id = %d"
 )
 
 func (tm *TabletManager) CreateVReplicationWorkflow(ctx context.Context, req *tabletmanagerdatapb.CreateVReplicationWorkflowRequest) (*tabletmanagerdatapb.CreateVReplicationWorkflowResponse, error) {
@@ -227,6 +230,18 @@
 	return resp, nil
 }
 
+func isStreamCopying(tm *TabletManager, id int64) (bool, error) {
+	query := fmt.Sprintf(sqlGetVReplicationCopyStatus, sidecar.GetIdentifier(), id)
+	res, err := tm.VREngine.Exec(query)
+	if err != nil {
+		return false, err
+	}
+	if res != nil && len(res.Rows) > 0 {
+		return true, nil
+	}
+	return false, nil
+}
+
 // UpdateVReplicationWorkflow updates the sidecar databases's vreplication
 // record(s) for this tablet's vreplication workflow stream(s). If there
 // are no streams for the given workflow on the tablet then a nil result
@@ -302,6 +317,17 @@
 		if !textutil.ValueIsSimulatedNull(req.State) {
 			state = binlogdatapb.VReplicationWorkflowState_name[int32(req.State)]
 		}
+		if state == binlogdatapb.VReplicationWorkflowState_Running.String() {
+			// `Workflow Start` sets the new state to Running. However, if stream is still copying tables, we should set
+			// the state as Copying.
+			isCopying, err := isStreamCopying(tm, id)
+			if err != nil {
+				return nil, err
+			}
+			if isCopying {
+				state = binlogdatapb.VReplicationWorkflowState_Copying.String()
+			}
+		}
 		bindVars = map[string]*querypb.BindVariable{
 			"st": sqltypes.StringBindVariable(state),
 			"sc": sqltypes.StringBindVariable(string(source)),

go/vt/vttablet/tabletmanager/rpc_vreplication_test.go

@@ -495,11 +495,18 @@ func TestUpdateVReplicationWorkflow(t *testing.T) {
 		),
 		fmt.Sprintf("%d", vreplID),
 	)
-
+	getCopyStateQuery := fmt.Sprintf(sqlGetVReplicationCopyStatus, sidecar.GetIdentifier(), int64(vreplID))
+	copyStatusFields := sqltypes.MakeTestFields(
+		"id",
+		"int64",
+	)
+	notCopying := sqltypes.MakeTestResult(copyStatusFields)
+	copying := sqltypes.MakeTestResult(copyStatusFields, "1")
 	tests := []struct {
-		name    string
-		request *tabletmanagerdatapb.UpdateVReplicationWorkflowRequest
-		query   string
+		name      string
+		request   *tabletmanagerdatapb.UpdateVReplicationWorkflowRequest
+		query     string
+		isCopying bool
 	}{
 		{
 			name: "update cells",
@@ -579,6 +586,19 @@ func TestUpdateVReplicationWorkflow(t *testing.T) {
 			query: fmt.Sprintf(`update _vt.vreplication set state = '%s', source = 'keyspace:\"%s\" shard:\"%s\" filter:{rules:{match:\"customer\" filter:\"select * from customer\"} rules:{match:\"corder\" filter:\"select * from corder\"}}', cell = '%s', tablet_types = '%s' where id in (%d)`,
 				binlogdatapb.VReplicationWorkflowState_Stopped.String(), keyspace, shard, cells[0], tabletTypes[0], vreplID),
 		},
+		{
+			name: "update to running while copying",
+			request: &tabletmanagerdatapb.UpdateVReplicationWorkflowRequest{
+				Workflow:    workflow,
+				State:       binlogdatapb.VReplicationWorkflowState_Running,
+				Cells:       textutil.SimulatedNullStringSlice,
+				TabletTypes: []topodatapb.TabletType{topodatapb.TabletType(textutil.SimulatedNullInt)},
+				OnDdl:       binlogdatapb.OnDDLAction(textutil.SimulatedNullInt),
+			},
+			isCopying: true,
+			query: fmt.Sprintf(`update _vt.vreplication set state = 'Copying', source = 'keyspace:\"%s\" shard:\"%s\" filter:{rules:{match:\"customer\" filter:\"select * from customer\"} rules:{match:\"corder\" filter:\"select * from corder\"}}', cell = '%s', tablet_types = '%s' where id in (%d)`,
+				keyspace, shard, cells[0], tabletTypes[0], vreplID),
+		},
 	}
 
 	for _, tt := range tests {
@@ -597,6 +617,16 @@ func TestUpdateVReplicationWorkflow(t *testing.T) {
 			// These are the same for each RPC call.
 			tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(fmt.Sprintf("use %s", sidecar.DefaultName), &sqltypes.Result{}, nil)
 			tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(selectQuery, selectRes, nil)
+			if tt.request.State == binlogdatapb.VReplicationWorkflowState_Running ||
+				tt.request.State == binlogdatapb.VReplicationWorkflowState(textutil.SimulatedNullInt) {
+				tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(fmt.Sprintf("use %s", sidecar.GetIdentifier()), &sqltypes.Result{}, nil)
+				if tt.isCopying {
+					tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(getCopyStateQuery, copying, nil)
+				} else {
+					tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(getCopyStateQuery, notCopying, nil)
+
+				}
+			}
 			tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(fmt.Sprintf("use %s", sidecar.DefaultName), &sqltypes.Result{}, nil)
 			tenv.tmc.tablets[tabletUID].vrdbClient.ExpectRequest(idQuery, idRes, nil)