func RecoverDeadMaster(analysisEntry inst.ReplicationAnalysis, skipProcesses bool) (bool, *inst.Instance, error) {
failedInstanceKey := &analysisEntry.AnalyzedInstanceKey
if ok, err := AttemptRecoveryRegistration(&analysisEntry); !ok {
log.Debugf("topology_recovery: found an active or recent recovery on %+v. Will not issue another RecoverDeadMaster.", *failedInstanceKey)
return false, nil, err
}
inst.AuditOperation("recover-dead-master", failedInstanceKey, "problem found; will recover")
if !skipProcesses {
if err := executeProcesses(config.Config.PreFailoverProcesses, "PreFailoverProcesses", analysisEntry, nil, true); err != nil {
return false, nil, err
}
}
log.Debugf("topology_recovery: RecoverDeadMaster: will recover %+v", *failedInstanceKey)
_, _, _, candidateSlave, err := inst.RegroupSlavesIncludingSubSlavesOfBinlogServers(failedInstanceKey, true, nil)
ResolveRecovery(failedInstanceKey, &candidateSlave.Key)
log.Debugf("topology_recovery: - RecoverDeadMaster: candidate slave is %+v", candidateSlave.Key)
inst.AuditOperation("recover-dead-master", failedInstanceKey, fmt.Sprintf("master: %+v", candidateSlave.Key))
return true, candidateSlave, err
}
func RecoverDeadMaster(analysisEntry inst.ReplicationAnalysis, skipProcesses bool) (promotedSlave *inst.Instance, lostSlaves [](*inst.Instance), err error) {
failedInstanceKey := &analysisEntry.AnalyzedInstanceKey
if ok, err := AttemptRecoveryRegistration(&analysisEntry); !ok {
log.Debugf("topology_recovery: found an active or recent recovery on %+v. Will not issue another RecoverDeadMaster.", *failedInstanceKey)
return nil, lostSlaves, err
}
inst.AuditOperation("recover-dead-master", failedInstanceKey, "problem found; will recover")
if !skipProcesses {
if err := executeProcesses(config.Config.PreFailoverProcesses, "PreFailoverProcesses", analysisEntry, nil, emptySlavesList, true); err != nil {
return nil, lostSlaves, err
}
}
log.Debugf("topology_recovery: RecoverDeadMaster: will recover %+v", *failedInstanceKey)
var masterRecoveryType MasterRecoveryType = MasterRecoveryPseudoGTID
if (analysisEntry.OracleGTIDImmediateTopology || analysisEntry.MariaDBGTIDImmediateTopology) && !analysisEntry.PseudoGTIDImmediateTopology {
masterRecoveryType = MasterRecoveryGTID
} else if analysisEntry.BinlogServerImmediateTopology {
masterRecoveryType = MasterRecoveryBinlogServer
}
log.Debugf("topology_recovery: RecoverDeadMaster: masterRecoveryType=%+v", masterRecoveryType)
switch masterRecoveryType {
case MasterRecoveryGTID:
{
lostSlaves, _, promotedSlave, err = inst.RegroupSlavesGTID(failedInstanceKey, true, nil)
}
case MasterRecoveryPseudoGTID:
{
lostSlaves, _, _, promotedSlave, err = inst.RegroupSlavesIncludingSubSlavesOfBinlogServers(failedInstanceKey, true, nil)
}
case MasterRecoveryBinlogServer:
{
promotedSlave, err = inst.RegroupSlavesBinlogServers(failedInstanceKey, true, nil)
}
}
if promotedSlave != nil && len(lostSlaves) > 0 && config.Config.DetachLostSlavesAfterMasterFailover {
log.Debugf("topology_recovery: - RecoverDeadMaster: lost %+v slaves during recovery process; detaching them", len(lostSlaves))
go func() {
for _, slave := range lostSlaves {
slave := slave
inst.DetachSlaveOperation(&slave.Key)
}
}()
}
if config.Config.MasterFailoverLostInstancesDowntimeMinutes > 0 {
inst.BeginDowntime(failedInstanceKey, inst.GetMaintenanceOwner(), "RecoverDeadMaster indicates this instance is lost", config.Config.MasterFailoverLostInstancesDowntimeMinutes*60)
for _, slave := range lostSlaves {
slave := slave
inst.BeginDowntime(&slave.Key, inst.GetMaintenanceOwner(), "RecoverDeadMaster indicates this instance is lost", config.Config.MasterFailoverLostInstancesDowntimeMinutes*60)
}
}
if promotedSlave == nil {
log.Debugf("topology_recovery: - RecoverDeadMaster: Failure: no slave promoted.")
inst.AuditOperation("recover-dead-master", failedInstanceKey, "Failure: no slave promoted.")
} else {
log.Debugf("topology_recovery: - RecoverDeadMaster: promoted slave is %+v", promotedSlave.Key)
inst.AuditOperation("recover-dead-master", failedInstanceKey, fmt.Sprintf("master: %+v", promotedSlave.Key))
}
return promotedSlave, lostSlaves, err
}