Add handlings to trafficSwitcher

Signed-off-by: Matt Lord <mattalord@gmail.com>

go/vt/vtctl/workflow/framework_test.go

@@ -141,7 +141,7 @@ func initSrvKeyspace(t *testing.T, topo *topo.Server, keyspace string, sources,
 		for _, shard := range shards {
 			keyRange, err := key.ParseShardingSpec(shard)
 			require.NoError(t, err)
-			require.Equal(t, 1, len(keyRange))
+			require.Len(t, keyRange, 1)
 			partition.ShardReferences = append(partition.ShardReferences, &topodatapb.ShardReference{
 				Name:     shard,
 				KeyRange: keyRange[0],

go/vt/vtctl/workflow/server.go

@@ -44,6 +44,7 @@ import (
 	"vitess.io/vitess/go/vt/concurrency"
 	"vitess.io/vitess/go/vt/discovery"
 	"vitess.io/vitess/go/vt/key"
+	"vitess.io/vitess/go/vt/log"
 	"vitess.io/vitess/go/vt/logutil"
 	"vitess.io/vitess/go/vt/mysqlctl/tmutils"
 	"vitess.io/vitess/go/vt/schema"
@@ -3078,6 +3079,13 @@ func (s *Server) WorkflowSwitchTraffic(ctx context.Context, req *vtctldatapb.Wor
 		return nil, err
 	}
 
+	if req.GetForce() {
+		if ts.options == nil {
+			ts.options = &vtctldatapb.WorkflowOptions{}
+		}
+		ts.options.WarnOnPartialTabletRefresh = true
+	}
+
 	if startState.WorkflowType == TypeMigrate {
 		return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid action for Migrate workflow: SwitchTraffic")
 	}
@@ -3644,10 +3652,15 @@ func (s *Server) canSwitch(ctx context.Context, ts *trafficSwitcher, state *Stat
 		defer wg.Done()
 		for _, si := range shards {
 			if partial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, s.ts, s.tmc, si, nil, ts.Logger()); err != nil || partial {
-				m.Lock()
-				refreshErrors.WriteString(fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s %s shard (%v):\n  %v\n",
-					si.Keyspace(), si.ShardName(), stype, err, partialDetails))
-				m.Unlock()
+				msg := fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s %s shard (%v):\n  %v\n",
+					si.Keyspace(), si.ShardName(), stype, err, partialDetails)
+				if partial && force {
+					log.Warning(msg)
+				} else {
+					m.Lock()
+					refreshErrors.WriteString(msg)
+					m.Unlock()
+				}
 			}
 		}
 	}
@@ -3656,7 +3669,7 @@ func (s *Server) canSwitch(ctx context.Context, ts *trafficSwitcher, state *Stat
 	wg.Add(1)
 	go refreshTablets(ts.TargetShards(), "target")
 	wg.Wait()
-	if refreshErrors.Len() > 0 && !force {
+	if refreshErrors.Len() > 0 {
 		return fmt.Sprintf(cannotSwitchFailedTabletRefresh, refreshErrors.String()), nil
 	}
 	return "", nil

go/vt/vtctl/workflow/server_test.go

@@ -942,7 +942,7 @@ func TestMoveTablesTrafficSwitching(t *testing.T) {
 					require.Equal(t, to, tt)
 				}
 			}
-			// Confirm that we have the expected denied tables entires.
+			// Confirm that we have the expected denied tables entries.
 			for _, keyspace := range []*testKeyspace{tc.sourceKeyspace, tc.targetKeyspace} {
 				for _, shardName := range keyspace.ShardNames {
 					si, err := env.ts.GetShard(ctx, keyspace.KeyspaceName, shardName)

go/vt/vtctl/workflow/traffic_switcher.go

@@ -35,6 +35,7 @@ import (
 	"vitess.io/vitess/go/vt/binlog/binlogplayer"
 	"vitess.io/vitess/go/vt/concurrency"
 	"vitess.io/vitess/go/vt/key"
+	"vitess.io/vitess/go/vt/log"
 	"vitess.io/vitess/go/vt/logutil"
 	"vitess.io/vitess/go/vt/sqlparser"
 	"vitess.io/vitess/go/vt/topo"
@@ -472,7 +473,17 @@ func (ts *trafficSwitcher) dropSourceDeniedTables(ctx context.Context) error {
 		}
 		rtbsCtx, cancel := context.WithTimeout(ctx, shardTabletRefreshTimeout)
 		defer cancel()
-		_, _, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), source.GetShard(), nil, ts.Logger())
+		isPartial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), source.GetShard(), nil, ts.Logger())
+		if isPartial {
+			msg := fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s source shard (%v):\n  %v",
+				source.GetShard().Keyspace(), source.GetShard().ShardName(), err, partialDetails)
+			if ts.options != nil && ts.options.WarnOnPartialTabletRefresh {
+				log.Warning(msg)
+				return nil
+			} else {
+				return errors.New(msg)
+			}
+		}
 		return err
 	})
 }
@@ -486,7 +497,17 @@ func (ts *trafficSwitcher) dropTargetDeniedTables(ctx context.Context) error {
 		}
 		rtbsCtx, cancel := context.WithTimeout(ctx, shardTabletRefreshTimeout)
 		defer cancel()
-		_, _, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), target.GetShard(), nil, ts.Logger())
+		isPartial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), target.GetShard(), nil, ts.Logger())
+		if isPartial {
+			msg := fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s target shard (%v):\n  %v",
+				target.GetShard().Keyspace(), target.GetShard().ShardName(), err, partialDetails)
+			if ts.options != nil && ts.options.WarnOnPartialTabletRefresh {
+				log.Warning(msg)
+				return nil
+			} else {
+				return errors.New(msg)
+			}
+		}
 		return err
 	})
 }
@@ -1040,8 +1061,14 @@ func (ts *trafficSwitcher) switchDeniedTables(ctx context.Context) error {
 			defer cancel()
 			isPartial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), source.GetShard(), nil, ts.Logger())
 			if isPartial {
-				err = fmt.Errorf("failed to successfully refresh all tablets in the %s/%s source shard (%v):\n  %v",
+				msg := fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s source shard (%v):\n  %v",
 					source.GetShard().Keyspace(), source.GetShard().ShardName(), err, partialDetails)
+				if ts.options != nil && ts.options.WarnOnPartialTabletRefresh {
+					log.Warning(msg)
+					return nil
+				} else {
+					return errors.New(msg)
+				}
 			}
 			return err
 		})
@@ -1057,8 +1084,14 @@ func (ts *trafficSwitcher) switchDeniedTables(ctx context.Context) error {
 			defer cancel()
 			isPartial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), target.GetShard(), nil, ts.Logger())
 			if isPartial {
-				err = fmt.Errorf("failed to successfully refresh all tablets in the %s/%s target shard (%v):\n  %v",
+				msg := fmt.Sprintf("failed to successfully refresh all tablets in the %s/%s target shard (%v):\n  %v",
 					target.GetShard().Keyspace(), target.GetShard().ShardName(), err, partialDetails)
+				if ts.options != nil && ts.options.WarnOnPartialTabletRefresh {
+					log.Warning(msg)
+					return nil
+				} else {
+					return errors.New(msg)
+				}
 			}
 			return err
 		})

go/vt/vtctl/workflow/traffic_switcher_test.go

@@ -28,10 +28,11 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	tabletmanagerdatapb "vitess.io/vitess/go/vt/proto/tabletmanagerdata"
 	"vitess.io/vitess/go/vt/proto/vschema"
 	"vitess.io/vitess/go/vt/topo"
 	"vitess.io/vitess/go/vt/vtgate/vindexes"
+
+	tabletmanagerdatapb "vitess.io/vitess/go/vt/proto/tabletmanagerdata"
 )
 
 type testTrafficSwitcher struct {

go/vt/vttablet/tabletserver/vstreamer/vstreamer.go

@@ -106,7 +106,7 @@ type streamerPlan struct {
 // filter: the list of filtering rules. If a rule has a select expression for its filter,
 //
 //	the select list can only reference direct columns. No other expressions are allowed.
-//	The select expression is allowed to contain the special 'keyspace_id()' function which
+//	The select expression is allowed to contain the special 'in_keyrange()' function which
 //	will return the keyspace id of the row. Examples:
 //	"select * from t", same as an empty Filter,
 //	"select * from t where in_keyrange('-80')", same as "-80",

proto/vtctldata.proto

@@ -214,6 +214,9 @@ message WorkflowOptions {
   // Shards on which vreplication streams in the target keyspace are created for this workflow and to which the data
   // from the source will be vreplicated.
   repeated string shards = 3;
+  // Should we log a warning on partial tablet refreshes rather than produce
+  // an error?
+  bool warn_on_partial_tablet_refresh = 4;
 }
 
 // TODO: comment the hell out of this.