func (driver *MesosSchedulerDriver) handleAuthenticationResult(from *upid.UPID, pbMsg proto.Message) {
if driver.status != mesos.Status_DRIVER_RUNNING {
log.V(1).Info("ignoring authenticate because driver is not running")
return
}
if !from.Equal(driver.self) {
log.Errorf("ignoring authentication result message received from upid '%v'", from)
return
}
if driver.authenticated {
// programming error
panic("already authenticated")
}
if driver.masterPid == nil {
log.Infoln("ignoring authentication result because master is lost")
driver.authenticating.cancel() // cancel any in-progress background attempt
// disable future retries until we get a new master
driver.reauthenticate = false
return
}
msg := pbMsg.(*mesos.InternalAuthenticationResult)
if driver.reauthenticate || !msg.GetCompleted() || driver.masterPid.String() != msg.GetPid() {
log.Infof("failed to authenticate with master %v: master changed", driver.masterPid)
driver.authenticating.cancel() // cancel any in-progress background authentication
driver.reauthenticate = false
driver.tryAuthentication()
return
}
if !msg.GetSuccess() {
log.Errorf("master %v refused authentication", driver.masterPid)
return
}
driver.authenticated = true
go driver.doReliableRegistration(float64(registrationBackoffFactor))
}
// lead master detection callback.
func (driver *MesosSchedulerDriver) handleMasterChanged(from *upid.UPID, pbMsg proto.Message) {
if driver.status == mesos.Status_DRIVER_ABORTED {
log.Info("Ignoring master change because the driver is aborted.")
return
} else if !from.Equal(driver.self) {
log.Errorf("ignoring master changed message received from upid '%v'", from)
return
}
// Reconnect every time a master is detected.
if driver.connected {
log.V(3).Info("Disconnecting scheduler.")
driver.masterPid = nil
driver.withScheduler(func(s Scheduler) { s.Disconnected(driver) })
}
msg := pbMsg.(*mesos.InternalMasterChangeDetected)
master := msg.Master
driver.connected = false
driver.authenticated = false
if master != nil {
log.Infof("New master %s detected\n", master.GetPid())
pid, err := upid.Parse(master.GetPid())
if err != nil {
panic("Unable to parse Master's PID value.") // this should not happen.
}
driver.masterPid = pid // save for downstream ops.
driver.tryAuthentication()
} else {
log.Infoln("No master detected.")
}
}
// statusUpdated expects to be guarded by eventLock
func (driver *MesosSchedulerDriver) statusUpdated(from *upid.UPID, pbMsg proto.Message) {
msg := pbMsg.(*mesos.StatusUpdateMessage)
if driver.status != mesos.Status_DRIVER_RUNNING {
log.V(1).Infoln("Ignoring StatusUpdate message, the driver is not running!")
return
}
if !from.Equal(driver.self) {
if !driver.connected {
log.V(1).Infoln("Ignoring StatusUpdate message, the driver is not connected!")
return
}
if !driver.masterPid.Equal(from) {
log.Warningf("ignoring status message because it was sent from '%v' instead of leading master '%v'", from, driver.masterPid)
return
}
}
log.V(2).Infof("Received status update from %q status source %q", from.String(), msg.GetPid())
status := msg.Update.GetStatus()
// see https://github.com/apache/mesos/blob/master/src/sched/sched.cpp#L887
// If the update does not have a 'uuid', it does not need
// acknowledging. However, prior to 0.23.0, the update uuid
// was required and always set. We also don't want to ACK updates
// that were internally generated. In 0.24.0, we can rely on the
// update uuid check here, until then we must still check for
// this being sent from the driver (from == UPID()) or from
// the master (pid == UPID()).
// TODO(vinod): Get rid of this logic in 0.25.0 because master
// and slave correctly set task status in 0.24.0.
if clearUUID := len(msg.Update.Uuid) == 0 || from.Equal(driver.self) || msg.GetPid() == driver.self.String(); clearUUID {
status.Uuid = nil
} else {
status.Uuid = msg.Update.Uuid
}
driver.withScheduler(func(s Scheduler) { s.StatusUpdate(driver, status) })
if driver.status == mesos.Status_DRIVER_ABORTED {
log.V(1).Infoln("Not sending StatusUpdate ACK, the driver is aborted!")
return
}
// Send StatusUpdate Acknowledgement; see above for the rules.
// Only send ACK if udpate was not from this driver and spec'd a UUID; this is compat w/ 0.23+
ackRequired := len(msg.Update.Uuid) > 0 && !from.Equal(driver.self) && msg.GetPid() != driver.self.String()
if ackRequired {
ackMsg := &mesos.StatusUpdateAcknowledgementMessage{
SlaveId: msg.Update.SlaveId,
FrameworkId: driver.frameworkInfo.Id,
TaskId: msg.Update.Status.TaskId,
Uuid: msg.Update.Uuid,
}
log.V(2).Infof("Sending ACK for status update %+v to %q", *msg.Update, from.String())
if err := driver.send(driver.masterPid, ackMsg); err != nil {
log.Errorf("Failed to send StatusUpdate ACK message: %v", err)
return
}
} else {
log.V(2).Infof("Not sending ACK, update is not from slave %q", from.String())
}
}