func TestBelowRaftProtos(t *testing.T) {
defer leaktest.AfterTest(t)()
// Enable the additional checks in TestMain. NB: running this test by itself
// will fail those extra checks - such failures are safe to ignore, so long
// as this test passes when run with the entire package's tests.
verifyBelowRaftProtos = true
slice := make([]byte, 1<<20)
for typ, fix := range belowRaftGoldenProtos {
if b, err := protoutil.Marshal(reflect.New(typ.Elem()).Interface().(proto.Message)); err != nil {
t.Fatal(err)
} else if err := verifyHash(b, fix.emptySum); err != nil {
t.Errorf("%s (empty): %s\n", typ, err)
}
randGen := rand.New(rand.NewSource(goldenSeed))
bytes := slice
numBytes := 0
for i := 0; i < itersPerProto; i++ {
if n, err := marshalTo(fix.populatedConstructor(randGen), bytes); err != nil {
t.Fatal(err)
} else {
bytes = bytes[n:]
numBytes += n
}
}
if err := verifyHash(slice[:numBytes], fix.populatedSum); err != nil {
t.Errorf("%s (populated): %s\n", typ, err)
}
}
}
// AddInfoProto adds or updates an info object. Returns an error if info
// couldn't be added.
func (g *Gossip) AddInfoProto(key string, msg proto.Message, ttl time.Duration) error {
bytes, err := protoutil.Marshal(msg)
if err != nil {
return err
}
return g.AddInfo(key, bytes, ttl)
}
// SetProto encodes the specified proto message into the bytes field of the
// receiver and clears the checksum. If the proto message is an
// InternalTimeSeriesData, the tag will be set to TIMESERIES rather than BYTES.
func (v *Value) SetProto(msg proto.Message) error {
// Fast-path for when the proto implements MarshalTo and Size (i.e. all of
// our protos). The fast-path marshals directly into the Value.RawBytes field
// instead of allocating a separate []byte and copying.
type marshalTo interface {
MarshalTo(data []byte) (int, error)
Size() int
}
if m, ok := msg.(marshalTo); ok {
size := m.Size()
v.RawBytes = make([]byte, headerSize+size)
// NB: This call to protoutil.Interceptor would be more natural
// encapsulated in protoutil.MarshalTo, yet that approach imposes a
// significant (~30%) slowdown. It is unclear why. See
// BenchmarkValueSetProto.
protoutil.Interceptor(msg)
if _, err := m.MarshalTo(v.RawBytes[headerSize:]); err != nil {
return err
}
// Special handling for timeseries data.
if _, ok := msg.(*InternalTimeSeriesData); ok {
v.setTag(ValueType_TIMESERIES)
} else {
v.setTag(ValueType_BYTES)
}
return nil
}
data, err := protoutil.Marshal(msg)
if err != nil {
return err
}
v.SetBytes(data)
return nil
}
func mustMarshal(m proto.Message) []byte {
b, err := protoutil.Marshal(m)
if err != nil {
panic(err)
}
return b
}
func (t *parallelTest) setup(spec *parTestSpec) {
if spec.ClusterSize == 0 {
spec.ClusterSize = 1
}
if testing.Verbose() || log.V(1) {
log.Infof(t.ctx, "Cluster Size: %d", spec.ClusterSize)
}
args := base.TestClusterArgs{
ServerArgs: base.TestServerArgs{
Knobs: base.TestingKnobs{
SQLExecutor: &sql.ExecutorTestingKnobs{
WaitForGossipUpdate: true,
CheckStmtStringChange: true,
},
},
},
}
t.cluster = serverutils.StartTestCluster(t, spec.ClusterSize, args)
t.clients = make([][]*gosql.DB, spec.ClusterSize)
for i := range t.clients {
t.clients[i] = append(t.clients[i], t.cluster.ServerConn(i))
}
r0 := sqlutils.MakeSQLRunner(t, t.clients[0][0])
if spec.RangeSplitSize != 0 {
if testing.Verbose() || log.V(1) {
log.Infof(t.ctx, "Setting range split size: %d", spec.RangeSplitSize)
}
zoneCfg := config.DefaultZoneConfig()
zoneCfg.RangeMaxBytes = int64(spec.RangeSplitSize)
zoneCfg.RangeMinBytes = zoneCfg.RangeMaxBytes / 2
buf, err := protoutil.Marshal(&zoneCfg)
if err != nil {
t.Fatal(err)
}
objID := keys.RootNamespaceID
r0.Exec(`UPDATE system.zones SET config = $2 WHERE id = $1`, objID, buf)
}
if testing.Verbose() || log.V(1) {
log.Infof(t.ctx, "Creating database")
}
r0.Exec("CREATE DATABASE test")
for i := range t.clients {
sqlutils.MakeSQLRunner(t, t.clients[i][0]).Exec("SET DATABASE = test")
}
if testing.Verbose() || log.V(1) {
log.Infof(t.ctx, "Test setup done")
}
}
// PutProto sets the given key to the protobuf-serialized byte string
// of msg and the provided timestamp. Returns the length in bytes of
// key and the value.
func PutProto(engine Writer, key MVCCKey, msg proto.Message) (keyBytes, valBytes int64, err error) {
bytes, err := protoutil.Marshal(msg)
if err != nil {
return 0, 0, err
}
if err := engine.Put(key, bytes); err != nil {
return 0, 0, err
}
return int64(key.EncodedSize()), int64(len(bytes)), nil
}
// UpdateZoneConfig updates the default zone config for the cluster.
func (c *Cluster) UpdateZoneConfig(rangeMinBytes, rangeMaxBytes int64) {
zone := config.DefaultZoneConfig()
zone.RangeMinBytes = rangeMinBytes
zone.RangeMaxBytes = rangeMaxBytes
buf, err := protoutil.Marshal(&zone)
if err != nil {
log.Fatal(context.Background(), err)
}
_, err = c.DB[0].Exec(`UPSERT INTO system.zones (id, config) VALUES (0, $1)`, buf)
if err != nil {
log.Fatal(context.Background(), err)
}
}
func TestBatchProto(t *testing.T) {
defer leaktest.AfterTest(t)()
stopper := stop.NewStopper()
defer stopper.Stop()
e := NewInMem(roachpb.Attributes{}, 1<<20)
stopper.AddCloser(e)
b := e.NewBatch()
defer b.Close()
val := roachpb.MakeValueFromString("value")
if _, _, err := PutProto(b, mvccKey("proto"), &val); err != nil {
t.Fatal(err)
}
getVal := &roachpb.Value{}
ok, keySize, valSize, err := b.GetProto(mvccKey("proto"), getVal)
if !ok || err != nil {
t.Fatalf("expected GetProto to success ok=%t: %s", ok, err)
}
if keySize != 6 {
t.Errorf("expected key size 6; got %d", keySize)
}
data, err := protoutil.Marshal(&val)
if err != nil {
t.Fatal(err)
}
if valSize != int64(len(data)) {
t.Errorf("expected value size %d; got %d", len(data), valSize)
}
if !proto.Equal(getVal, &val) {
t.Errorf("expected %v; got %v", &val, getVal)
}
// Before commit, proto will not be available via engine.
if ok, _, _, err := e.GetProto(mvccKey("proto"), getVal); ok || err != nil {
t.Fatalf("expected GetProto to fail ok=%t: %s", ok, err)
}
// Commit and verify the proto can be read directly from the engine.
if err := b.Commit(); err != nil {
t.Fatal(err)
}
if ok, _, _, err := e.GetProto(mvccKey("proto"), getVal); !ok || err != nil {
t.Fatalf("expected GetProto to success ok=%t: %s", ok, err)
}
if !proto.Equal(getVal, &val) {
t.Errorf("expected %v; got %v", &val, getVal)
}
}
// MergeInternalTimeSeriesData exports the engine's C++ merge logic for
// InternalTimeSeriesData to higher level packages. This is intended primarily
// for consumption by high level testing of time series functionality.
func MergeInternalTimeSeriesData(
sources ...roachpb.InternalTimeSeriesData,
) (roachpb.InternalTimeSeriesData, error) {
// Wrap each proto in an inlined MVCC value, and marshal each wrapped value
// to bytes. This is the format required by the engine.
srcBytes := make([][]byte, 0, len(sources))
for _, src := range sources {
var val roachpb.Value
if err := val.SetProto(&src); err != nil {
return roachpb.InternalTimeSeriesData{}, err
}
bytes, err := protoutil.Marshal(&enginepb.MVCCMetadata{
RawBytes: val.RawBytes,
})
if err != nil {
return roachpb.InternalTimeSeriesData{}, err
}
srcBytes = append(srcBytes, bytes)
}
// Merge every element into a nil byte slice, one at a time.
var (
mergedBytes []byte
err error
)
for _, bytes := range srcBytes {
mergedBytes, err = goMerge(mergedBytes, bytes)
if err != nil {
return roachpb.InternalTimeSeriesData{}, err
}
}
// Unmarshal merged bytes and extract the time series value within.
var meta enginepb.MVCCMetadata
if err := proto.Unmarshal(mergedBytes, &meta); err != nil {
return roachpb.InternalTimeSeriesData{}, err
}
mergedTS, err := MakeValue(meta).GetTimeseries()
if err != nil {
return roachpb.InternalTimeSeriesData{}, err
}
return mergedTS, nil
}
func doHTTPReq(
t *testing.T, client http.Client, method, url string, body proto.Message,
) (*http.Response, error) {
var b io.Reader
if body != nil {
buf, err := protoutil.Marshal(body)
if err != nil {
t.Fatal(err)
}
b = bytes.NewReader(buf)
}
req, err := http.NewRequest(method, url, b)
if err != nil {
t.Fatalf("%s %s: error building request: %s", method, url, err)
}
if b != nil {
req.Header.Add(httputil.ContentTypeHeader, httputil.ProtoContentType)
}
return client.Do(req)
}
func TestDropDatabase(t *testing.T) {
defer leaktest.AfterTest(t)()
params, _ := createTestServerParams()
s, sqlDB, kvDB := serverutils.StartServer(t, params)
defer s.Stopper().Stop()
ctx := context.TODO()
// Fix the column families so the key counts below don't change if the
// family heuristics are updated.
if _, err := sqlDB.Exec(`
CREATE DATABASE t;
CREATE TABLE t.kv (k CHAR PRIMARY KEY, v CHAR, FAMILY (k), FAMILY (v));
INSERT INTO t.kv VALUES ('c', 'e'), ('a', 'c'), ('b', 'd');
`); err != nil {
t.Fatal(err)
}
dbNameKey := sqlbase.MakeNameMetadataKey(keys.RootNamespaceID, "t")
r, err := kvDB.Get(ctx, dbNameKey)
if err != nil {
t.Fatal(err)
}
if !r.Exists() {
t.Fatalf(`database "t" does not exist`)
}
dbDescKey := sqlbase.MakeDescMetadataKey(sqlbase.ID(r.ValueInt()))
desc := &sqlbase.Descriptor{}
if err := kvDB.GetProto(ctx, dbDescKey, desc); err != nil {
t.Fatal(err)
}
dbDesc := desc.GetDatabase()
tbNameKey := sqlbase.MakeNameMetadataKey(dbDesc.ID, "kv")
gr, err := kvDB.Get(ctx, tbNameKey)
if err != nil {
t.Fatal(err)
}
if !gr.Exists() {
t.Fatalf(`table "kv" does not exist`)
}
tbDescKey := sqlbase.MakeDescMetadataKey(sqlbase.ID(gr.ValueInt()))
if err := kvDB.GetProto(ctx, tbDescKey, desc); err != nil {
t.Fatal(err)
}
tbDesc := desc.GetTable()
// Add a zone config for both the table and database.
cfg := config.DefaultZoneConfig()
buf, err := protoutil.Marshal(&cfg)
if err != nil {
t.Fatal(err)
}
if _, err := sqlDB.Exec(`INSERT INTO system.zones VALUES ($1, $2)`, tbDesc.ID, buf); err != nil {
t.Fatal(err)
}
if _, err := sqlDB.Exec(`INSERT INTO system.zones VALUES ($1, $2)`, dbDesc.ID, buf); err != nil {
t.Fatal(err)
}
tbZoneKey := sqlbase.MakeZoneKey(tbDesc.ID)
dbZoneKey := sqlbase.MakeZoneKey(dbDesc.ID)
if gr, err := kvDB.Get(ctx, tbZoneKey); err != nil {
t.Fatal(err)
} else if !gr.Exists() {
t.Fatalf("table zone config entry not found")
}
if gr, err := kvDB.Get(ctx, dbZoneKey); err != nil {
t.Fatal(err)
} else if !gr.Exists() {
t.Fatalf("database zone config entry not found")
}
tablePrefix := keys.MakeTablePrefix(uint32(tbDesc.ID))
tableStartKey := roachpb.Key(tablePrefix)
tableEndKey := tableStartKey.PrefixEnd()
if kvs, err := kvDB.Scan(ctx, tableStartKey, tableEndKey, 0); err != nil {
t.Fatal(err)
} else if l := 6; len(kvs) != l {
t.Fatalf("expected %d key value pairs, but got %d", l, len(kvs))
}
if _, err := sqlDB.Exec(`DROP DATABASE t`); err != nil {
t.Fatal(err)
}
if kvs, err := kvDB.Scan(ctx, tableStartKey, tableEndKey, 0); err != nil {
t.Fatal(err)
} else if l := 0; len(kvs) != l {
t.Fatalf("expected %d key value pairs, but got %d", l, len(kvs))
}
if gr, err := kvDB.Get(ctx, tbDescKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("table descriptor still exists after database is dropped: %q", tbDescKey)
}
if gr, err := kvDB.Get(ctx, tbNameKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("table descriptor key still exists after database is dropped")
}
if gr, err := kvDB.Get(ctx, dbDescKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("database descriptor still exists after database is dropped")
}
if gr, err := kvDB.Get(ctx, dbNameKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("database descriptor key still exists after database is dropped")
}
if gr, err := kvDB.Get(ctx, tbZoneKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("table zone config entry still exists after the database is dropped")
}
if gr, err := kvDB.Get(ctx, dbZoneKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("database zone config entry still exists after the database is dropped")
}
}
func TestDropTable(t *testing.T) {
defer leaktest.AfterTest(t)()
params, _ := createTestServerParams()
s, sqlDB, kvDB := serverutils.StartServer(t, params)
defer s.Stopper().Stop()
ctx := context.TODO()
numRows := 2*sql.TableTruncateChunkSize + 1
createKVTable(t, sqlDB, numRows)
tableDesc := sqlbase.GetTableDescriptor(kvDB, "t", "kv")
nameKey := sqlbase.MakeNameMetadataKey(keys.MaxReservedDescID+1, "kv")
gr, err := kvDB.Get(ctx, nameKey)
if err != nil {
t.Fatal(err)
}
if !gr.Exists() {
t.Fatalf("Name entry %q does not exist", nameKey)
}
descKey := sqlbase.MakeDescMetadataKey(sqlbase.ID(gr.ValueInt()))
// Add a zone config for the table.
cfg := config.DefaultZoneConfig()
buf, err := protoutil.Marshal(&cfg)
if err != nil {
t.Fatal(err)
}
if _, err := sqlDB.Exec(`INSERT INTO system.zones VALUES ($1, $2)`, tableDesc.ID, buf); err != nil {
t.Fatal(err)
}
zoneKey := sqlbase.MakeZoneKey(tableDesc.ID)
if gr, err := kvDB.Get(ctx, zoneKey); err != nil {
t.Fatal(err)
} else if !gr.Exists() {
t.Fatalf("zone config entry not found")
}
tablePrefix := roachpb.Key(keys.MakeTablePrefix(uint32(tableDesc.ID)))
checkKeyCount(t, kvDB, tablePrefix, 3*numRows)
if _, err := sqlDB.Exec(`DROP TABLE t.kv`); err != nil {
t.Fatal(err)
}
checkKeyCount(t, kvDB, tablePrefix, 0)
// Test that deleted table cannot be used. This prevents regressions where
// name -> descriptor ID caches might make this statement erronously work.
if _, err := sqlDB.Exec(`SELECT * FROM t.kv`); !testutils.IsError(err, `table "t.kv" does not exist`) {
t.Fatalf("different error than expected: %v", err)
}
if gr, err := kvDB.Get(ctx, descKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("table descriptor still exists after the table is dropped")
}
if gr, err := kvDB.Get(ctx, nameKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("table namekey still exists after the table is dropped")
}
if gr, err := kvDB.Get(ctx, zoneKey); err != nil {
t.Fatal(err)
} else if gr.Exists() {
t.Fatalf("zone config entry still exists after the table is dropped")
}
}
// TestGetZoneConfig exercises config.GetZoneConfig and the sql hook for it.
func TestGetZoneConfig(t *testing.T) {
defer leaktest.AfterTest(t)()
params, _ := createTestServerParams()
srv, sqlDB, _ := serverutils.StartServer(t, params)
defer srv.Stopper().Stop()
s := srv.(*server.TestServer)
expectedCounter := uint32(keys.MaxReservedDescID)
defaultZoneConfig := config.DefaultZoneConfig()
defaultZoneConfig.RangeMinBytes = 1 << 20
defaultZoneConfig.RangeMaxBytes = 1 << 20
defaultZoneConfig.GC.TTLSeconds = 60
{
buf, err := protoutil.Marshal(&defaultZoneConfig)
if err != nil {
t.Fatal(err)
}
objID := keys.RootNamespaceID
if _, err = sqlDB.Exec(`UPDATE system.zones SET config = $2 WHERE id = $1`, objID, buf); err != nil {
t.Fatalf("problem writing zone %+v: %s", defaultZoneConfig, err)
}
}
// Naming scheme for database and tables:
// db1 has tables tb11 and tb12
// db2 has tables tb21 and tb22
expectedCounter++
db1 := expectedCounter
if _, err := sqlDB.Exec(`CREATE DATABASE db1`); err != nil {
t.Fatal(err)
}
expectedCounter++
db2 := expectedCounter
if _, err := sqlDB.Exec(`CREATE DATABASE db2`); err != nil {
t.Fatal(err)
}
expectedCounter++
tb11 := expectedCounter
if _, err := sqlDB.Exec(`CREATE TABLE db1.tb1 (k INT PRIMARY KEY, v INT)`); err != nil {
t.Fatal(err)
}
expectedCounter++
tb12 := expectedCounter
if _, err := sqlDB.Exec(`CREATE TABLE db1.tb2 (k INT PRIMARY KEY, v INT)`); err != nil {
t.Fatal(err)
}
expectedCounter++
tb21 := expectedCounter
if _, err := sqlDB.Exec(`CREATE TABLE db2.tb1 (k INT PRIMARY KEY, v INT)`); err != nil {
t.Fatal(err)
}
expectedCounter++
tb22 := expectedCounter
if _, err := sqlDB.Exec(`CREATE TABLE db2.tb2 (k INT PRIMARY KEY, v INT)`); err != nil {
t.Fatal(err)
}
{
cfg := forceNewConfig(t, s)
// We have no custom zone configs.
testCases := []struct {
key roachpb.RKey
zoneCfg config.ZoneConfig
}{
{roachpb.RKeyMin, defaultZoneConfig},
{keys.MakeTablePrefix(0), defaultZoneConfig},
{keys.MakeTablePrefix(1), defaultZoneConfig},
{keys.MakeTablePrefix(keys.MaxReservedDescID), defaultZoneConfig},
{keys.MakeTablePrefix(db1), defaultZoneConfig},
{keys.MakeTablePrefix(db2), defaultZoneConfig},
{keys.MakeTablePrefix(tb11), defaultZoneConfig},
{keys.MakeTablePrefix(tb12), defaultZoneConfig},
{keys.MakeTablePrefix(tb21), defaultZoneConfig},
{keys.MakeTablePrefix(tb22), defaultZoneConfig},
}
for tcNum, tc := range testCases {
zoneCfg, err := cfg.GetZoneConfigForKey(tc.key)
if err != nil {
t.Fatalf("#%d: err=%s", tcNum, err)
}
if !proto.Equal(&zoneCfg, &tc.zoneCfg) {
t.Errorf("#%d: bad zone config.\nexpected: %+v\ngot: %+v", tcNum, tc.zoneCfg, zoneCfg)
}
}
}
// Now set some zone configs. We don't have a nice way of using table
// names for this, so we do raw puts.
// Here is the list of dbs/tables and whether they have a custom zone config:
// db1: true
// tb1: true
// tb2: false
// db1: false
// tb1: true
// tb2: false
db1Cfg := config.ZoneConfig{
NumReplicas: 1,
Constraints: config.Constraints{Constraints: []config.Constraint{{Value: "db1"}}},
}
tb11Cfg := config.ZoneConfig{
NumReplicas: 1,
Constraints: config.Constraints{Constraints: []config.Constraint{{Value: "db1.tb1"}}},
}
tb21Cfg := config.ZoneConfig{
NumReplicas: 1,
Constraints: config.Constraints{Constraints: []config.Constraint{{Value: "db2.tb1"}}},
}
for objID, objZone := range map[uint32]config.ZoneConfig{
db1: db1Cfg,
tb11: tb11Cfg,
tb21: tb21Cfg,
} {
buf, err := protoutil.Marshal(&objZone)
if err != nil {
t.Fatal(err)
}
if _, err = sqlDB.Exec(`INSERT INTO system.zones VALUES ($1, $2)`, objID, buf); err != nil {
t.Fatalf("problem writing zone %+v: %s", objZone, err)
}
}
{
cfg := forceNewConfig(t, s)
testCases := []struct {
key roachpb.RKey
zoneCfg config.ZoneConfig
}{
{roachpb.RKeyMin, defaultZoneConfig},
{keys.MakeTablePrefix(0), defaultZoneConfig},
{keys.MakeTablePrefix(1), defaultZoneConfig},
{keys.MakeTablePrefix(keys.MaxReservedDescID), defaultZoneConfig},
{keys.MakeTablePrefix(db1), db1Cfg},
{keys.MakeTablePrefix(db2), defaultZoneConfig},
{keys.MakeTablePrefix(tb11), tb11Cfg},
{keys.MakeTablePrefix(tb12), db1Cfg},
{keys.MakeTablePrefix(tb21), tb21Cfg},
{keys.MakeTablePrefix(tb22), defaultZoneConfig},
}
for tcNum, tc := range testCases {
zoneCfg, err := cfg.GetZoneConfigForKey(tc.key)
if err != nil {
t.Fatalf("#%d: err=%s", tcNum, err)
}
if !proto.Equal(&zoneCfg, &tc.zoneCfg) {
t.Errorf("#%d: bad zone config.\nexpected: %+v\ngot: %+v", tcNum, tc.zoneCfg, zoneCfg)
}
}
}
}
// runSetZone parses the yaml input file, converts it to proto, and inserts it
// in the system.zones table.
func runSetZone(cmd *cobra.Command, args []string) error {
if len(args) != 1 {
return usageAndError(cmd)
}
conn, err := getPasswordAndMakeSQLClient()
if err != nil {
return err
}
defer conn.Close()
names, err := parseZoneName(args[0])
if err != nil {
return err
}
if err := conn.Exec(`BEGIN`, nil); err != nil {
return err
}
path, err := queryDescriptorIDPath(conn, names)
if err != nil {
if err == io.EOF {
fmt.Printf("%s not found\n", args[0])
return nil
}
return err
}
_, zone, err := queryZonePath(conn, path)
if err != nil {
return err
}
// Convert it to proto and marshal it again to put into the table. This is a
// bit more tedious than taking protos directly, but yaml is a more widely
// understood format.
// Read zoneConfig file to conf.
conf, err := readZoneConfig()
if err != nil {
return fmt.Errorf("error reading zone config: %s", err)
}
if err := yaml.Unmarshal(conf, &zone); err != nil {
return fmt.Errorf("unable to parse zoneConfig file: %s", err)
}
if err := zone.Validate(); err != nil {
return err
}
buf, err := protoutil.Marshal(&zone)
if err != nil {
return fmt.Errorf("unable to parse zone config file %q: %s", args[1], err)
}
id := path[len(path)-1]
_, _, _, err = runQuery(conn, makeQuery(
`UPSERT INTO system.zones (id, config) VALUES ($1, $2)`,
id, buf), false)
if err != nil {
return err
}
if err := conn.Exec(`COMMIT`, nil); err != nil {
return err
}
res, err := yaml.Marshal(zone)
if err != nil {
return err
}
fmt.Print(string(res))
return nil
}