Golang Machine.Id方法代码示例

// checkStartInstance checks that an instance has been started
// with a machine id the same as m's, and that the machine's
// instance id has been set appropriately.
func (s *ProvisionerSuite) checkStartInstance(c *C, m *state.Machine, secret string) {
	s.State.StartSync()
	for {
		select {
		case o := <-s.op:
			switch o := o.(type) {
			case dummy.OpStartInstance:
				info := s.StateInfo(c)
				info.EntityName = m.EntityName()
				c.Assert(o.Info.Password, Not(HasLen), 0)
				info.Password = o.Info.Password
				c.Assert(o.Info, DeepEquals, info)

				// Check we can connect to the state with
				// the machine's entity name and password.
				st, err := state.Open(o.Info)
				c.Assert(err, IsNil)
				st.Close()

				c.Assert(o.MachineId, Equals, m.Id())
				c.Assert(o.Instance, NotNil)
				s.checkInstanceId(c, m, o.Instance)
				c.Assert(o.Secret, Equals, secret)
				return
			default:
				c.Logf("ignoring unexpected operation %#v", o)
			}
		case <-time.After(2 * time.Second):
			c.Errorf("provisioner did not start an instance")
			return
		}
	}
}

// startInstance starts a new instance for the given machine.
func (s *FirewallerSuite) startInstance(c *C, m *state.Machine) environs.Instance {
	inst, err := s.Conn.Environ.StartInstance(m.Id(), testing.InvalidStateInfo(m.Id()), nil)
	c.Assert(err, IsNil)
	err = m.SetInstanceId(inst.Id())
	c.Assert(err, IsNil)
	return inst
}

func (s *assignCleanSuite) assertAssignUnit(c *C, expectedMachine *state.Machine) {
	unit, err := s.wordpress.AddUnit()
	c.Assert(err, IsNil)
	reusedMachine, err := s.assignUnit(unit)
	c.Assert(err, IsNil)
	c.Assert(reusedMachine.Id(), Equals, expectedMachine.Id())
	c.Assert(reusedMachine.Clean(), jc.IsFalse)
}

func (s *CommonProvisionerSuite) checkStartInstanceCustom(c *C, m *state.Machine, secret string, cons constraints.Value) (inst instance.Instance) {
	s.State.StartSync()
	for {
		select {
		case o := <-s.op:
			switch o := o.(type) {
			case dummy.OpStartInstance:
				inst = o.Instance
				s.waitInstanceId(c, m, inst.Id())

				// Check the instance was started with the expected params.
				c.Assert(o.MachineId, Equals, m.Id())
				nonceParts := strings.SplitN(o.MachineNonce, ":", 2)
				c.Assert(nonceParts, HasLen, 2)
				c.Assert(nonceParts[0], Equals, state.MachineTag("0"))
				c.Assert(nonceParts[1], checkers.Satisfies, utils.IsValidUUIDString)
				c.Assert(o.Secret, Equals, secret)
				c.Assert(o.Constraints, DeepEquals, cons)

				// Check we can connect to the state with
				// the machine's entity name and password.
				info := s.StateInfo(c)
				info.Tag = m.Tag()
				c.Assert(o.Info.Password, Not(HasLen), 0)
				info.Password = o.Info.Password
				c.Assert(o.Info, DeepEquals, info)
				// Check we can connect to the state with
				// the machine's entity name and password.
				st, err := state.Open(o.Info, state.DefaultDialOpts())
				c.Assert(err, IsNil)

				// All provisioned machines in this test suite have their hardware characteristics
				// attributes set to the same values as the constraints due to the dummy environment being used.
				hc, err := m.HardwareCharacteristics()
				c.Assert(err, IsNil)
				c.Assert(*hc, DeepEquals, instance.HardwareCharacteristics{
					Arch:     cons.Arch,
					Mem:      cons.Mem,
					CpuCores: cons.CpuCores,
					CpuPower: cons.CpuPower,
				})
				st.Close()
				return
			default:
				c.Logf("ignoring unexpected operation %#v", o)
			}
		case <-time.After(2 * time.Second):
			c.Fatalf("provisioner did not start an instance")
			return
		}
	}
	return
}

func (c *NatCommand) ExecSsh(m *state.Machine, script string) error {
	host := instance.SelectPublicAddress(m.Addresses())
	if host == "" {
		return fmt.Errorf("could not resolve machine's public address")
	}
	log.Println("Configuring NAT routing on machine ", m.Id())
	var options ssh.Options
	cmd := ssh.Command("[email protected]"+host, []string{"sh -c 'NATCMD=$(mktemp); cat >${NATCMD}; sudo sh -x ${NATCMD}'"}, &options)
	cmd.Stdin = strings.NewReader(script)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	return cmd.Run()
}

func (task *provisionerTask) startMachine(machine *state.Machine) error {
	stateInfo, apiInfo, err := task.auth.SetupAuthentication(machine)
	if err != nil {
		logger.Errorf("failed to setup authentication: %v", err)
		return err
	}
	cons, err := machine.Constraints()
	if err != nil {
		return err
	}
	// Generate a unique nonce for the new instance.
	uuid, err := utils.NewUUID()
	if err != nil {
		return err
	}
	// Generated nonce has the format: "machine-#:UUID". The first
	// part is a badge, specifying the tag of the machine the provisioner
	// is running on, while the second part is a random UUID.
	nonce := fmt.Sprintf("%s:%s", names.MachineTag(task.machineId), uuid.String())
	inst, metadata, err := task.broker.StartInstance(machine.Id(), nonce, machine.Series(), cons, stateInfo, apiInfo)
	if err != nil {
		// Set the state to error, so the machine will be skipped next
		// time until the error is resolved, but don't return an
		// error; just keep going with the other machines.
		logger.Errorf("cannot start instance for machine %q: %v", machine, err)
		if err1 := machine.SetStatus(params.StatusError, err.Error()); err1 != nil {
			// Something is wrong with this machine, better report it back.
			logger.Errorf("cannot set error status for machine %q: %v", machine, err1)
			return err1
		}
		return nil
	}
	if err := machine.SetProvisioned(inst.Id(), nonce, metadata); err != nil {
		logger.Errorf("cannot register instance for machine %v: %v", machine, err)
		// The machine is started, but we can't record the mapping in
		// state. It'll keep running while we fail out and restart,
		// but will then be detected by findUnknownInstances and
		// killed again.
		//
		// TODO(dimitern) Stop the instance right away here.
		//
		// Multiple instantiations of a given machine (with the same
		// machine ID) cannot coexist, because findUnknownInstances is
		// called before startMachines. However, if the first machine
		// had started to do work before being replaced, we may
		// encounter surprising problems.
		return err
	}
	logger.Infof("started machine %s as instance %s with hardware %q", machine, inst.Id(), metadata)
	return nil
}

// instanceForMachine returns the environs.Instance that represents this machine's instance.
func (p *Provisioner) instanceForMachine(m *state.Machine) (environs.Instance, error) {
	inst, ok := p.instances[m.Id()]
	if ok {
		return inst, nil
	}
	instId, ok := m.InstanceId()
	if !ok {
		return nil, errNotProvisioned
	}
	// TODO(dfc): Ask for all instances at once.
	insts, err := p.environ.Instances([]state.InstanceId{instId})
	if err != nil {
		return nil, err
	}
	inst = insts[0]
	return inst, nil
}

func (context *statusContext) makeMachineStatus(machine *state.Machine) (status machineStatus) {
	status.Id = machine.Id()
	status.Life,
		status.AgentVersion,
		status.AgentState,
		status.AgentStateInfo,
		status.Err = processAgent(machine)
	status.Series = machine.Series()
	instid, err := machine.InstanceId()
	if err == nil {
		status.InstanceId = instid
		inst, ok := context.instances[instid]
		if ok {
			status.DNSName, _ = inst.DNSName()
		} else {
			// Double plus ungood.  There is an instance id recorded
			// for this machine in the state, yet the environ cannot
			// find that id.
			status.InstanceState = "missing"
		}
	} 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.IsNotFoundError(err) {
			status.Hardware = "error"
		}
	} else {
		status.Hardware = hc.String()
	}
	status.Containers = make(map[string]machineStatus)
	return
}

func (s *ProvisionerSuite) checkStartInstanceCustom(c *C, m *state.Machine, secret string, cons constraints.Value) {
	s.State.StartSync()
	for {
		select {
		case o := <-s.op:
			switch o := o.(type) {
			case dummy.OpStartInstance:
				s.waitInstanceId(c, m, o.Instance.Id())

				// Check the instance was started with the expected params.
				c.Assert(o.MachineId, Equals, m.Id())
				nonceParts := strings.SplitN(o.MachineNonce, ":", 2)
				c.Assert(nonceParts, HasLen, 2)
				c.Assert(nonceParts[0], Equals, state.MachineTag("0"))
				c.Assert(utils.IsValidUUIDString(nonceParts[1]), Equals, true)
				c.Assert(o.Secret, Equals, secret)
				c.Assert(o.Constraints, DeepEquals, cons)

				// Check we can connect to the state with
				// the machine's entity name and password.
				info := s.StateInfo(c)
				info.Tag = m.Tag()
				c.Assert(o.Info.Password, Not(HasLen), 0)
				info.Password = o.Info.Password
				c.Assert(o.Info, DeepEquals, info)
				// Check we can connect to the state with
				// the machine's entity name and password.
				st, err := state.Open(o.Info, state.DefaultDialOpts())
				c.Assert(err, IsNil)

				st.Close()
				return
			default:
				c.Logf("ignoring unexpected operation %#v", o)
			}
		case <-time.After(2 * time.Second):
			c.Fatalf("provisioner did not start an instance")
			return
		}
	}
}

func (p *Provisioner) startMachine(m *state.Machine) error {
	// TODO(dfc) the state.Info passed to environ.StartInstance remains contentious
	// however as the PA only knows one state.Info, and that info is used by MAs and
	// UAs to locate the state for this environment, it is logical to use the same
	// state.Info as the PA.
	stateInfo, apiInfo, err := p.setupAuthentication(m)
	if err != nil {
		return err
	}
	cons, err := m.Constraints()
	if err != nil {
		return err
	}
	// Generate a unique nonce for the new instance.
	uuid, err := utils.NewUUID()
	if err != nil {
		return err
	}
	// Generated nonce has the format: "machine-#:UUID". The first
	// part is a badge, specifying the tag of the machine the provisioner
	// is running on, while the second part is a random UUID.
	nonce := fmt.Sprintf("%s:%s", state.MachineTag(p.machineId), uuid.String())
	inst, err := p.environ.StartInstance(m.Id(), nonce, m.Series(), cons, stateInfo, apiInfo)
	if err != nil {
		// Set the state to error, so the machine will be skipped next
		// time until the error is resolved, but don't return an
		// error; just keep going with the other machines.
		log.Errorf("worker/provisioner: cannot start instance for machine %q: %v", m, err)
		if err1 := m.SetStatus(params.StatusError, err.Error()); err1 != nil {
			// Something is wrong with this machine, better report it back.
			log.Errorf("worker/provisioner: cannot set error status for machine %q: %v", m, err1)
			return err1
		}
		return nil
	}
	if err := m.SetProvisioned(inst.Id(), nonce); err != nil {
		// The machine is started, but we can't record the mapping in
		// state. It'll keep running while we fail out and restart,
		// but will then be detected by findUnknownInstances and
		// killed again.
		//
		// TODO(dimitern) Stop the instance right away here.
		//
		// Multiple instantiations of a given machine (with the same
		// machine ID) cannot coexist, because findUnknownInstances is
		// called before startMachines. However, if the first machine
		// had started to do work before being replaced, we may
		// encounter surprising problems.
		return err
	}
	// populate the local cache
	p.instances[m.Id()] = inst
	p.machines[inst.Id()] = m.Id()
	log.Noticef("worker/provisioner: started machine %s as instance %s", m, inst.Id())
	return nil
}

func MatchNetworks(host, gateway *state.Machine) (string, string, error) {
	var bestPrefix, bestHost, bestGw string
	for _, hostAddr := range host.Addresses() {
		if hostAddr.Type != instance.Ipv4Address || isLoopback(hostAddr.Value) {
			continue
		}
		for _, gwAddr := range gateway.Addresses() {
			if gwAddr.Type != instance.Ipv4Address || isLoopback(hostAddr.Value) {
				continue
			}
			prefix := greatestCommonPrefix(hostAddr.Value, gwAddr.Value)
			if len(prefix) > len(bestPrefix) {
				bestPrefix = prefix
				bestHost = hostAddr.Value
				bestGw = gwAddr.Value
			}
		}
	}
	if bestHost != "" && bestGw != "" {
		return bestHost, bestGw, nil
	} else {
		return "", "", fmt.Errorf("failed to find common network for %s and %s", host.Id(), gateway.Id())
	}
}

// startInstance starts a new instance for the given machine.
func (s *FirewallerSuite) startInstance(c *C, m *state.Machine) instance.Instance {
	inst, hc := testing.StartInstance(c, s.Conn.Environ, m.Id())
	err := m.SetProvisioned(inst.Id(), "fake_nonce", hc)
	c.Assert(err, IsNil)
	return inst
}

// newAgent returns a new MachineAgent instance
func (s *MachineSuite) newAgent(c *C, m *state.Machine) *MachineAgent {
	a := &MachineAgent{}
	s.initAgent(c, a, "--machine-id", m.Id())
	return a
}