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* Adds binary to run vtshovel. * At the moment only working in ephemeral mode (i.e no data is persisted back to vrsettings). * vtshovel only works for statement based replication right now. This is due to now having a good way to have a schema loader. We will itereate on this. Signed-off-by: Rafael Chacon <[email protected]>
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| /* | ||
| Copyright 2017 Google 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. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "flag" | ||
| "io/ioutil" | ||
| "math/rand" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "vitess.io/vitess/go/exit" | ||
| "vitess.io/vitess/go/mysql" | ||
| "vitess.io/vitess/go/vt/binlog/binlogplayer" | ||
| "vitess.io/vitess/go/vt/log" | ||
| "vitess.io/vitess/go/vt/servenv" | ||
| "vitess.io/vitess/go/vt/vterrors" | ||
|
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| "vitess.io/vitess/go/sqltypes" | ||
| "vitess.io/vitess/go/vt/vttablet/tabletmanager/vreplication" | ||
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| binlogdatapb "vitess.io/vitess/go/vt/proto/binlogdata" | ||
| tabletmanagerdatapb "vitess.io/vitess/go/vt/proto/tabletmanagerdata" | ||
| ) | ||
|
|
||
| var ( | ||
| vtShovelConfigFile = flag.String("vtshovel-config-file", "/etc/slack.d/vtshovel.json", "VTShovel Config file") | ||
| dryRun = flag.Bool("dry-run", false, "When present, only log DML that are going to be performed in target database") | ||
|
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| autoIncr = regexp.MustCompile(` AUTO_INCREMENT=\d+`) | ||
| ) | ||
|
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| func init() { | ||
| rand.Seed(time.Now().UnixNano()) | ||
| servenv.RegisterDefaultFlags() | ||
| } | ||
|
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| // VtShovelConfig fields to configure vtshovel client | ||
| type VtShovelConfig struct { | ||
| // Source MySQL client information | ||
|
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| // MySQLSourceHost ... | ||
| MySQLSourceHost string `json:"mysql_source_host"` | ||
| // MySQLSourcePort ... | ||
| MySQLSourcePort int `json:"mysql_source_port"` | ||
| // MySQLSourceUser ... | ||
| MySQLSourceUser string `json:"mysql_source_user"` | ||
| // MySQLSourcePassword ... | ||
| MySQLSourcePassword string `json:"mysql_source_password"` | ||
| // MySQLSourceBinlogStartPos ... | ||
| MySQLSourceBinlogStartPos string `json:"mysql_source_binlog_start_pos"` | ||
| // MySQLSourceDatabase ... | ||
| MySQLSourceDBName string `json:"mysql_source_dbname"` | ||
|
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| // Target MySQL client information | ||
|
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| // MySQLTargetHost ... | ||
| MySQLTargetHost string `json:"mysql_target_host"` | ||
| // MySQLTargetPort ... | ||
| MySQLTargetPort int `json:"mysql_target_port"` | ||
| // MySQLTargetUser ... | ||
| MySQLTargetUser string `json:"mysql_target_user"` | ||
| // MySQLTargetPassword ... | ||
| MySQLTargetPassword string `json:"mysql_target_password"` | ||
| // MySQLTargetDBName ... | ||
| MySQLTargetDBName string `json:"mysql_target_dbname"` | ||
| } | ||
|
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| func main() { | ||
| defer exit.Recover() | ||
|
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| servenv.ParseFlags("vtshovel") | ||
| servenv.Init() | ||
|
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| servenv.OnRun(func() { | ||
| //vreplication.MySQLAddStatusPart() | ||
| // Flags are parsed now. Parse the template using the actual flag value and overwrite the current template. | ||
| //addStatusParts(vtg) | ||
| }) | ||
|
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| vtShovelConfig, err := loadConfigFromFile(*vtShovelConfigFile) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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| targetConnParams := mysql.ConnParams{ | ||
| Host: vtShovelConfig.MySQLTargetHost, | ||
| Port: vtShovelConfig.MySQLTargetPort, | ||
| Pass: vtShovelConfig.MySQLTargetPassword, | ||
| Uname: vtShovelConfig.MySQLTargetUser, | ||
| DbName: vtShovelConfig.MySQLTargetDBName, | ||
| } | ||
| dbTargetClient := newVtShovelDbClient( | ||
| binlogplayer.NewDBClient(&targetConnParams), | ||
| vtShovelConfig.MySQLSourceBinlogStartPos, | ||
| ) | ||
|
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| if err := dbTargetClient.Connect(); err != nil { | ||
| log.Fatal(vterrors.Wrap(err, "can't connect to database")) | ||
| } | ||
|
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| sourceConnParams := mysql.ConnParams{ | ||
| Host: vtShovelConfig.MySQLSourceHost, | ||
| Port: vtShovelConfig.MySQLSourcePort, | ||
| Pass: vtShovelConfig.MySQLSourcePassword, | ||
| Uname: vtShovelConfig.MySQLSourceUser, | ||
| } | ||
|
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| servenv.OnClose(dbTargetClient.Close) | ||
|
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| source := binlogdatapb.BinlogSource{ | ||
| Filter: &binlogdatapb.Filter{ | ||
| Rules: []*binlogdatapb.Rule{ | ||
| &binlogdatapb.Rule{ | ||
| Match: "/" + vtShovelConfig.MySQLSourceDBName + ".*/", | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
| ctx := context.Background() | ||
| sourceVstreamClient := vreplication.NewMySQLVStreamerClient(&sourceConnParams) | ||
| go func() { | ||
| replicator := vreplication.NewVReplicator( | ||
| 1, | ||
| &source, | ||
| sourceVstreamClient, | ||
| binlogplayer.NewStats(), | ||
| dbTargetClient, | ||
| newVtShovelSchemaLoader(), | ||
| ) | ||
| replicator.Replicate(ctx) | ||
| if err != nil { | ||
| log.Infof("Error starting stream: %v", err) | ||
|
|
||
| } | ||
| return | ||
| }() | ||
| servenv.RunDefault() | ||
| } | ||
|
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| func loadConfigFromFile(file string) (*VtShovelConfig, error) { | ||
| data, err := ioutil.ReadFile(file) | ||
| if err != nil { | ||
| return nil, vterrors.Wrapf(err, "Failed to read %v file", file) | ||
| } | ||
| vtShovelConfig := &VtShovelConfig{} | ||
| err = json.Unmarshal(data, vtShovelConfig) | ||
| if err != nil { | ||
| return nil, vterrors.Wrap(err, "Error parsing auth server config") | ||
| } | ||
| return vtShovelConfig, nil | ||
| } | ||
|
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| type vtShovelDbClient struct { | ||
| dbClient binlogplayer.DBClient | ||
| startPos string | ||
| } | ||
|
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| type vtShovelSchemaLoader struct{} | ||
|
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| func newVtShovelDbClient(dbClient binlogplayer.DBClient, startPos string) binlogplayer.DBClient { | ||
| return &vtShovelDbClient{ | ||
| dbClient: dbClient, | ||
| startPos: startPos, | ||
| } | ||
| } | ||
|
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| func newVtShovelSchemaLoader() vreplication.SchemasLoader { | ||
| return &vtShovelSchemaLoader{} | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) DBName() string { | ||
| return vdc.dbClient.DBName() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) Connect() error { | ||
| return vdc.dbClient.Connect() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) Begin() error { | ||
| return vdc.dbClient.Begin() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) Commit() error { | ||
| return vdc.dbClient.Commit() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) Rollback() error { | ||
| return vdc.dbClient.Rollback() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) Close() { | ||
| vdc.dbClient.Close() | ||
| } | ||
|
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| func (vdc *vtShovelDbClient) ExecuteFetch(query string, maxrows int) (*sqltypes.Result, error) { | ||
| if strings.Contains(query, "from _vt.copy_state") { | ||
| dummyResult := &sqltypes.Result{ | ||
| Rows: [][]sqltypes.Value{ | ||
| []sqltypes.Value{ | ||
| sqltypes.NewInt64(0), | ||
| }, | ||
| }, | ||
| } | ||
| return dummyResult, nil | ||
| } | ||
|
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| if strings.Contains(query, "from _vt.vreplication") { | ||
| dummyResult := &sqltypes.Result{ | ||
| Rows: [][]sqltypes.Value{ | ||
| []sqltypes.Value{ | ||
| sqltypes.NewVarBinary(vdc.startPos), | ||
| sqltypes.NewVarBinary(""), // StopPos | ||
| sqltypes.NewInt64(10000), // maxTPS | ||
| sqltypes.NewInt64(10000), // maxReplicationLag | ||
| sqltypes.NewVarBinary("Running"), // state | ||
| }, | ||
| }, | ||
| } | ||
| return dummyResult, nil | ||
| } | ||
|
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| if strings.Contains(query, "update _vt.vreplication") { | ||
| return &sqltypes.Result{}, nil | ||
| } | ||
| return vdc.dbClient.ExecuteFetch(query, maxrows) | ||
| } | ||
|
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| func (vsl *vtShovelSchemaLoader) GetSchema(dbName string, tables, excludeTables []string, includeViews bool) (*tabletmanagerdatapb.SchemaDefinition, error) { | ||
| // TODO: This will only work for stament based replication. | ||
| return &tabletmanagerdatapb.SchemaDefinition{ | ||
| TableDefinitions: []*tabletmanagerdatapb.TableDefinition{}, | ||
| }, nil | ||
| } |
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