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Merge pull request #155 from github/relaxed-log-slave-updates

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relaxed check for log_slave_updates
This commit is contained in:
Shlomi Noach 2016-08-12 11:25:18 +02:00 committed by GitHub
commit 51111e0aa7
2 changed files with 21 additions and 6 deletions
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24
go/logic/inspect.go
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@ -246,17 +246,14 @@ func (this *Inspector) applyBinlogFormat() error {
// validateBinlogs checks that binary log configuration is good to go
func (this *Inspector) validateBinlogs() error {
query := `select @@global.log_bin, @@global.log_slave_updates, @@global.binlog_format`
var hasBinaryLogs, logSlaveUpdates bool
if err := this.db.QueryRow(query).Scan(&hasBinaryLogs, &logSlaveUpdates, &this.migrationContext.OriginalBinlogFormat); err != nil {
query := `select @@global.log_bin, @@global.binlog_format`
var hasBinaryLogs bool
if err := this.db.QueryRow(query).Scan(&hasBinaryLogs, &this.migrationContext.OriginalBinlogFormat); err != nil {
return err
}
if !hasBinaryLogs {
return fmt.Errorf("%s:%d must have binary logs enabled", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
}
if !logSlaveUpdates {
return fmt.Errorf("%s:%d must have log_slave_updates enabled", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
}
if this.migrationContext.RequiresBinlogFormatChange() {
if !this.migrationContext.SwitchToRowBinlogFormat {
return fmt.Errorf("You must be using ROW binlog format. I can switch it for you, provided --switch-to-rbr and that %s:%d doesn't have replicas", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
@ -286,6 +283,21 @@ func (this *Inspector) validateBinlogs() error {
return nil
}
// validateLogSlaveUpdates checks that binary log log_slave_updates is set. This test is not required when migrating on replica or when migrating directly on master
func (this *Inspector) validateLogSlaveUpdates() error {
query := `select @@global.log_slave_updates`
var logSlaveUpdates bool
if err := this.db.QueryRow(query).Scan(&logSlaveUpdates); err != nil {
return err
}
if !logSlaveUpdates && !this.migrationContext.InspectorIsAlsoApplier() {
return fmt.Errorf("%s:%d must have log_slave_updates enabled", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
}
log.Infof("binary logs updates validated on %s:%d", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
return nil
}
// validateTable makes sure the table we need to operate on actually exists
func (this *Inspector) validateTable() error {
query := fmt.Sprintf(`show /* gh-ost */ table status from %s like '%s'`, sql.EscapeName(this.migrationContext.DatabaseName), this.migrationContext.OriginalTableName)

3
go/logic/migrator.go
View File

@ -828,6 +828,9 @@ func (this *Migrator) initiateInspector() (err error) {
} else if this.migrationContext.InspectorIsAlsoApplier() && !this.migrationContext.AllowedRunningOnMaster {
return fmt.Errorf("It seems like this migration attempt to run directly on master. Preferably it would be executed on a replica (and this reduces load from the master). To proceed please provide --allow-on-master")
}
if err := this.inspector.validateLogSlaveUpdates(); err != nil {
return err
}
log.Infof("Master found to be %+v", *this.migrationContext.ApplierConnectionConfig.ImpliedKey)
return nil