Ejemplo n.º 1
0
// ServerError returns an error suitable for returning to an API
// client, with an error code suitable for various kinds of errors
// generated in packages outside the API.
func ServerError(err error) *params.Error {
	if err == nil {
		return nil
	}
	code, ok := singletonCode(err)
	switch {
	case ok:
	case errors.IsUnauthorized(err):
		code = params.CodeUnauthorized
	case errors.IsNotFound(err):
		code = params.CodeNotFound
	case errors.IsAlreadyExists(err):
		code = params.CodeAlreadyExists
	case state.IsNotAssigned(err):
		code = params.CodeNotAssigned
	case state.IsHasAssignedUnitsError(err):
		code = params.CodeHasAssignedUnits
	case IsNoAddressSetError(err):
		code = params.CodeNoAddressSet
	case state.IsNotProvisionedError(err):
		code = params.CodeNotProvisioned
	case IsUnknownEnviromentError(err):
		code = params.CodeNotFound
	default:
		code = params.ErrCode(err)
	}
	return &params.Error{
		Message: err.Error(),
		Code:    code,
	}
}
Ejemplo n.º 2
0
func machineLoop(context machineContext, m machine, changed <-chan struct{}) error {
	// Use a short poll interval when initially waiting for
	// a machine's address and machine agent to start, and a long one when it already
	// has an address and the machine agent is started.
	pollInterval := ShortPoll
	pollInstance := true
	for {
		if pollInstance {
			instInfo, err := pollInstanceInfo(context, m)
			if err != nil && !state.IsNotProvisionedError(err) {
				// If the provider doesn't implement Addresses/Status now,
				// it never will until we're upgraded, so don't bother
				// asking any more. We could use less resources
				// by taking down the entire worker, but this is easier for now
				// (and hopefully the local provider will implement
				// Addresses/Status in the not-too-distant future),
				// so we won't need to worry about this case at all.
				if errors.IsNotImplemented(err) {
					pollInterval = 365 * 24 * time.Hour
				} else {
					return err
				}
			}
			machineStatus := params.StatusPending
			if err == nil {
				if machineStatus, _, _, err = m.Status(); err != nil {
					logger.Warningf("cannot get current machine status for machine %v: %v", m.Id(), err)
				}
			}
			if len(instInfo.addresses) > 0 && instInfo.status != "" && machineStatus == params.StatusStarted {
				// We've got at least one address and a status and instance is started, so poll infrequently.
				pollInterval = LongPoll
			} else if pollInterval < LongPoll {
				// We have no addresses or not started - poll increasingly rarely
				// until we do.
				pollInterval = time.Duration(float64(pollInterval) * ShortPollBackoff)
			}
			pollInstance = false
		}
		select {
		case <-time.After(pollInterval):
			pollInstance = true
		case <-context.dying():
			return nil
		case <-changed:
			if err := m.Refresh(); err != nil {
				return err
			}
			if m.Life() == state.Dead {
				return nil
			}
		}
	}
}
Ejemplo n.º 3
0
// waitInstanceId waits until the supplied machine has an instance id, then
// asserts it is as expected.
func (s *CommonProvisionerSuite) waitInstanceId(c *gc.C, m *state.Machine, expect instance.Id) {
	s.waitHardwareCharacteristics(c, m, func() bool {
		if actual, err := m.InstanceId(); err == nil {
			c.Assert(actual, gc.Equals, expect)
			return true
		} else if !state.IsNotProvisionedError(err) {
			// We don't expect any errors.
			panic(err)
		}
		c.Logf("machine %v is still unprovisioned", m)
		return false
	})
}
Ejemplo n.º 4
0
// environManagerInstances returns all environ manager instances.
func environManagerInstances(st *state.State) ([]instance.Id, error) {
	info, err := st.StateServerInfo()
	if err != nil {
		return nil, err
	}
	instances := make([]instance.Id, 0, len(info.MachineIds))
	for _, id := range info.MachineIds {
		machine, err := st.Machine(id)
		if err != nil {
			return nil, err
		}
		instanceId, err := machine.InstanceId()
		if err == nil {
			instances = append(instances, instanceId)
		} else if !state.IsNotProvisionedError(err) {
			return nil, err
		}
	}
	return instances, nil
}
Ejemplo n.º 5
0
func (context *statusContext) makeMachineStatus(machine *state.Machine) (status api.MachineStatus) {
	status.Id = machine.Id()
	status.Agent, status.AgentState, status.AgentStateInfo = processAgent(machine)
	status.AgentVersion = status.Agent.Version
	status.Life = status.Agent.Life
	status.Err = status.Agent.Err
	status.Series = machine.Series()
	status.Jobs = paramsJobsFromJobs(machine.Jobs())
	status.WantsVote = machine.WantsVote()
	status.HasVote = machine.HasVote()
	instid, err := machine.InstanceId()
	if err == nil {
		status.InstanceId = instid
		status.InstanceState, err = machine.InstanceStatus()
		if err != nil {
			status.InstanceState = "error"
		}
		status.DNSName = network.SelectPublicAddress(machine.Addresses())
	} else {
		if state.IsNotProvisionedError(err) {
			status.InstanceId = "pending"
		} else {
			status.InstanceId = "error"
		}
		// There's no point in reporting a pending agent state
		// if the machine hasn't been provisioned. This
		// also makes unprovisioned machines visually distinct
		// in the output.
		status.AgentState = ""
	}
	hc, err := machine.HardwareCharacteristics()
	if err != nil {
		if !errors.IsNotFound(err) {
			status.Hardware = "error"
		}
	} else {
		status.Hardware = hc.String()
	}
	status.Containers = make(map[string]api.MachineStatus)
	return
}
Ejemplo n.º 6
0
// pollInstanceInfo checks the current provider addresses and status
// for the given machine's instance, and sets them on the machine if they've changed.
func pollInstanceInfo(context machineContext, m machine) (instInfo instanceInfo, err error) {
	instInfo = instanceInfo{}
	instId, err := m.InstanceId()
	// We can't ask the machine for its addresses if it isn't provisioned yet.
	if state.IsNotProvisionedError(err) {
		return instInfo, err
	}
	if err != nil {
		return instInfo, fmt.Errorf("cannot get machine's instance id: %v", err)
	}
	instInfo, err = context.instanceInfo(instId)
	if err != nil {
		if errors.IsNotImplemented(err) {
			return instInfo, err
		}
		logger.Warningf("cannot get instance info for instance %q: %v", instId, err)
		return instInfo, nil
	}
	currentInstStatus, err := m.InstanceStatus()
	if err != nil {
		// This should never occur since the machine is provisioned.
		// But just in case, we reset polled status so we try again next time.
		logger.Warningf("cannot get current instance status for machine %v: %v", m.Id(), err)
		instInfo.status = ""
	} else {
		if instInfo.status != currentInstStatus {
			logger.Infof("machine %q has new instance status: %v", m.Id(), instInfo.status)
			if err = m.SetInstanceStatus(instInfo.status); err != nil {
				logger.Errorf("cannot set instance status on %q: %v", m, err)
			}
		}
	}
	if !addressesEqual(m.Addresses(), instInfo.addresses) {
		logger.Infof("machine %q has new addresses: %v", m.Id(), instInfo.addresses)
		if err = m.SetAddresses(instInfo.addresses...); err != nil {
			logger.Errorf("cannot set addresses on %q: %v", m, err)
		}
	}
	return instInfo, err
}
Ejemplo n.º 7
0
func (s *workerSuite) TestWorker(c *gc.C) {
	// Most functionality is already tested in detail - we
	// just need to test that things are wired together
	// correctly.
	s.PatchValue(&ShortPoll, 10*time.Millisecond)
	s.PatchValue(&LongPoll, 10*time.Millisecond)
	s.PatchValue(&gatherTime, 10*time.Millisecond)
	machines, insts := s.setupScenario(c)
	s.State.StartSync()
	w := NewWorker(s.State)
	defer func() {
		c.Assert(worker.Stop(w), gc.IsNil)
	}()

	checkInstanceInfo := func(index int, m machine, expectedStatus string) bool {
		isProvisioned := true
		status, err := m.InstanceStatus()
		if state.IsNotProvisionedError(err) {
			isProvisioned = false
		} else {
			c.Assert(err, gc.IsNil)
		}
		return reflect.DeepEqual(m.Addresses(), s.addressesForIndex(index)) && (!isProvisioned || status == expectedStatus)
	}

	// Wait for the odd numbered machines in the
	// first half of the machine slice to be given their
	// addresses and status.
	for a := coretesting.LongAttempt.Start(); a.Next(); {
		if !a.HasNext() {
			c.Fatalf("timed out waiting for instance info")
		}

		if machinesSatisfy(c, machines, func(i int, m *state.Machine) bool {
			if i < len(machines)/2 && i%2 == 1 {
				return checkInstanceInfo(i, m, "running")
			}
			status, err := m.InstanceStatus()
			if i%2 == 0 {
				// Even machines not provisioned yet.
				c.Assert(err, jc.Satisfies, state.IsNotProvisionedError)
			} else {
				c.Assert(status, gc.Equals, "")
			}
			return len(m.Addresses()) == 0
		}) {
			break
		}
	}
	// Now provision the even machines in the first half and watch them get addresses.
	for i := 0; i < len(insts)/2; i += 2 {
		m := machines[i]
		err := m.SetProvisioned(insts[i].Id(), "nonce", nil)
		c.Assert(err, gc.IsNil)
		dummy.SetInstanceAddresses(insts[i], s.addressesForIndex(i))
		dummy.SetInstanceStatus(insts[i], "running")
	}
	for a := coretesting.LongAttempt.Start(); a.Next(); {
		if !a.HasNext() {
			c.Fatalf("timed out waiting for machine instance info")
		}
		if machinesSatisfy(c, machines, func(i int, m *state.Machine) bool {
			if i < len(machines)/2 {
				return checkInstanceInfo(i, m, "running")
			}
			// Machines in second half still have no addresses, nor status.
			status, err := m.InstanceStatus()
			if i%2 == 0 {
				// Even machines not provisioned yet.
				c.Assert(err, jc.Satisfies, state.IsNotProvisionedError)
			} else {
				c.Assert(status, gc.Equals, "")
			}
			return len(m.Addresses()) == 0
		}) {
			break
		}
	}

	// Provision the remaining machines and check the address and status.
	for i := len(insts) / 2; i < len(insts); i++ {
		if i%2 == 0 {
			m := machines[i]
			err := m.SetProvisioned(insts[i].Id(), "nonce", nil)
			c.Assert(err, gc.IsNil)
		}
		dummy.SetInstanceAddresses(insts[i], s.addressesForIndex(i))
		dummy.SetInstanceStatus(insts[i], "running")
	}
	for a := coretesting.LongAttempt.Start(); a.Next(); {
		if !a.HasNext() {
			c.Fatalf("timed out waiting for machine instance info")
		}
		if machinesSatisfy(c, machines, func(i int, m *state.Machine) bool {
			return checkInstanceInfo(i, m, "running")
		}) {
			break
		}
	}
}