// CopyShards will create the shards in the destination topo
func CopyShards(ctx context.Context, fromTS, toTS topo.Impl) {
keyspaces, err := fromTS.GetKeyspaces(ctx)
if err != nil {
log.Fatalf("fromTS.GetKeyspaces: %v", err)
}
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, keyspace := range keyspaces {
wg.Add(1)
go func(keyspace string) {
defer wg.Done()
shards, err := fromTS.GetShardNames(ctx, keyspace)
if err != nil {
rec.RecordError(fmt.Errorf("GetShardNames(%v): %v", keyspace, err))
return
}
for _, shard := range shards {
wg.Add(1)
go func(keyspace, shard string) {
defer wg.Done()
if err := toTS.CreateShard(ctx, keyspace, shard, &topodatapb.Shard{}); err != nil {
if err == topo.ErrNodeExists {
log.Warningf("shard %v/%v already exists", keyspace, shard)
} else {
rec.RecordError(fmt.Errorf("CreateShard(%v, %v): %v", keyspace, shard, err))
return
}
}
s, _, err := fromTS.GetShard(ctx, keyspace, shard)
if err != nil {
rec.RecordError(fmt.Errorf("GetShard(%v, %v): %v", keyspace, shard, err))
return
}
_, toV, err := toTS.GetShard(ctx, keyspace, shard)
if err != nil {
rec.RecordError(fmt.Errorf("toTS.GetShard(%v, %v): %v", keyspace, shard, err))
return
}
if _, err := toTS.UpdateShard(ctx, keyspace, shard, s, toV); err != nil {
rec.RecordError(fmt.Errorf("UpdateShard(%v, %v): %v", keyspace, shard, err))
}
}(keyspace, shard)
}
}(keyspace)
}
wg.Wait()
if rec.HasErrors() {
log.Fatalf("copyShards failed: %v", rec.Error())
}
}
// checkShard verifies the Shard operations work correctly
func checkShard(t *testing.T, ts topo.Impl) {
ctx := context.Background()
tts := topo.Server{Impl: ts}
if err := ts.CreateKeyspace(ctx, "test_keyspace", &topodatapb.Keyspace{}); err != nil {
t.Fatalf("CreateKeyspace: %v", err)
}
shard := &topodatapb.Shard{
KeyRange: newKeyRange("b0-c0"),
}
if err := ts.CreateShard(ctx, "test_keyspace", "b0-c0", shard); err != nil {
t.Fatalf("CreateShard: %v", err)
}
if err := ts.CreateShard(ctx, "test_keyspace", "b0-c0", shard); err != topo.ErrNodeExists {
t.Errorf("CreateShard called second time, got: %v", err)
}
// Delete shard and see if we can re-create it.
if err := ts.DeleteShard(ctx, "test_keyspace", "b0-c0"); err != nil {
t.Fatalf("DeleteShard: %v", err)
}
if err := ts.CreateShard(ctx, "test_keyspace", "b0-c0", shard); err != nil {
t.Fatalf("CreateShard: %v", err)
}
// Delete ALL shards.
if err := ts.DeleteKeyspaceShards(ctx, "test_keyspace"); err != nil {
t.Fatalf("DeleteKeyspaceShards: %v", err)
}
if err := ts.CreateShard(ctx, "test_keyspace", "b0-c0", shard); err != nil {
t.Fatalf("CreateShard: %v", err)
}
if _, _, err := ts.GetShard(ctx, "test_keyspace", "666"); err != topo.ErrNoNode {
t.Errorf("GetShard(666): %v", err)
}
shard, version, err := ts.GetShard(ctx, "test_keyspace", "b0-c0")
if err != nil {
t.Errorf("GetShard: %v", err)
}
if want := newKeyRange("b0-c0"); !key.KeyRangeEqual(shard.KeyRange, want) {
t.Errorf("shard.KeyRange: want %v, got %v", want, shard.KeyRange)
}
master := &topodatapb.TabletAlias{Cell: "ny", Uid: 1}
shard.MasterAlias = master
shard.KeyRange = newKeyRange("b0-c0")
shard.ServedTypes = []*topodatapb.Shard_ServedType{
{
TabletType: topodatapb.TabletType_MASTER,
},
{
TabletType: topodatapb.TabletType_REPLICA,
Cells: []string{"c1"},
},
{
TabletType: topodatapb.TabletType_RDONLY,
},
}
shard.SourceShards = []*topodatapb.Shard_SourceShard{
{
Uid: 1,
Keyspace: "source_ks",
Shard: "b8-c0",
KeyRange: newKeyRange("b8-c0"),
Tables: []string{"table1", "table2"},
},
}
shard.TabletControls = []*topodatapb.Shard_TabletControl{
{
TabletType: topodatapb.TabletType_MASTER,
Cells: []string{"c1", "c2"},
BlacklistedTables: []string{"black1", "black2"},
},
{
TabletType: topodatapb.TabletType_REPLICA,
DisableQueryService: true,
},
}
if _, err := ts.UpdateShard(ctx, "test_keyspace", "b0-c0", shard, version); err != nil {
t.Errorf("UpdateShard: %v", err)
}
other := &topodatapb.TabletAlias{Cell: "ny", Uid: 82873}
_, err = tts.UpdateShardFields(ctx, "test_keyspace", "b0-c0", func(si *topo.ShardInfo) error {
si.MasterAlias = other
return nil
})
if err != nil {
t.Fatalf("UpdateShardFields error: %v", err)
}
s, _, err := ts.GetShard(ctx, "test_keyspace", "b0-c0")
if err != nil {
t.Fatalf("GetShard: %v", err)
}
if *s.MasterAlias != *other {
t.Fatalf("shard.MasterAlias = %v, want %v", s.MasterAlias, other)
}
// unconditional shard update
_, err = ts.UpdateShard(ctx, "test_keyspace", "b0-c0", shard, -1)
if err != nil {
t.Fatalf("UpdateShard(-1) error: %v", err)
}
updatedShard, _, err := ts.GetShard(ctx, "test_keyspace", "b0-c0")
if err != nil {
t.Fatalf("GetShard: %v", err)
}
if eq, err := shardEqual(shard, updatedShard); err != nil {
t.Errorf("cannot compare shards: %v", err)
} else if !eq {
t.Errorf("put and got shards are not identical:\n%#v\n%#v", shard, updatedShard)
}
// test GetShardNames
shards, err := ts.GetShardNames(ctx, "test_keyspace")
if err != nil {
t.Errorf("GetShardNames: %v", err)
}
if len(shards) != 1 || shards[0] != "b0-c0" {
t.Errorf(`GetShardNames: want [ "b0-c0" ], got %v`, shards)
}
if _, err := ts.GetShardNames(ctx, "test_keyspace666"); err != topo.ErrNoNode {
t.Errorf("GetShardNames(666): %v", err)
}
// test ValidateShard
if err := ts.ValidateShard(ctx, "test_keyspace", "b0-c0"); err != nil {
t.Errorf("ValidateShard(test_keyspace, b0-c0) failed: %v", err)
}
}