Example #1
0
// pendingOrDead looks up machines with ids and returns those that do not
// have an instance id assigned yet, and also those that are dead.
func (task *provisionerTask) pendingOrDead(ids []string) (pending, dead []*apiprovisioner.Machine, err error) {
	for _, id := range ids {
		machine, found := task.machines[id]
		if !found {
			logger.Infof("machine %q not found", id)
			continue
		}
		switch machine.Life() {
		case params.Dying:
			if _, err := machine.InstanceId(); err == nil {
				continue
			} else if !params.IsCodeNotProvisioned(err) {
				logger.Errorf("failed to load machine %q instance id: %v", machine, err)
				return nil, nil, err
			}
			logger.Infof("killing dying, unprovisioned machine %q", machine)
			if err := machine.EnsureDead(); err != nil {
				logger.Errorf("failed to ensure machine dead %q: %v", machine, err)
				return nil, nil, err
			}
			fallthrough
		case params.Dead:
			dead = append(dead, machine)
			continue
		}
		if instId, err := machine.InstanceId(); err != nil {
			if !params.IsCodeNotProvisioned(err) {
				logger.Errorf("failed to load machine %q instance id: %v", machine, err)
				continue
			}
			status, _, err := machine.Status()
			if err != nil {
				logger.Infof("cannot get machine %q status: %v", machine, err)
				continue
			}
			if status == params.StatusPending {
				pending = append(pending, machine)
				logger.Infof("found machine %q pending provisioning", machine)
				continue
			}
		} else {
			logger.Infof("machine %v already started as instance %q", machine, instId)
		}
	}
	logger.Tracef("pending machines: %v", pending)
	logger.Tracef("dead machines: %v", dead)
	return
}
Example #2
0
// findUnknownInstances finds instances which are not associated with a machine.
func (task *provisionerTask) findUnknownInstances(stopping []instance.Instance) ([]instance.Instance, error) {
	// Make a copy of the instances we know about.
	instances := make(map[instance.Id]instance.Instance)
	for k, v := range task.instances {
		instances[k] = v
	}

	for _, m := range task.machines {
		instId, err := m.InstanceId()
		switch {
		case err == nil:
			delete(instances, instId)
		case params.IsCodeNotProvisioned(err):
		case params.IsCodeNotFoundOrCodeUnauthorized(err):
		default:
			return nil, err
		}
	}
	// Now remove all those instances that we are stopping already as we
	// know about those and don't want to include them in the unknown list.
	for _, inst := range stopping {
		delete(instances, inst.Id())
	}
	var unknown []instance.Instance
	for _, inst := range instances {
		unknown = append(unknown, inst)
	}
	return unknown, nil
}
Example #3
0
// openAPIState opens the API using the given information, and
// returns the opened state and the api entity with
// the given tag. The given changeConfig function is
// called if the password changes to set the password.
func openAPIState(
	agentConfig agent.Config,
	a Agent,
) (_ *api.State, _ *apiagent.Entity, err error) {
	// We let the API dial fail immediately because the
	// runner's loop outside the caller of openAPIState will
	// keep on retrying. If we block for ages here,
	// then the worker that's calling this cannot
	// be interrupted.
	info := agentConfig.APIInfo()
	st, err := apiOpen(info, api.DialOpts{})
	usedOldPassword := false
	if params.IsCodeUnauthorized(err) {
		// We've perhaps used the wrong password, so
		// try again with the fallback password.
		info := *info
		info.Password = agentConfig.OldPassword()
		usedOldPassword = true
		st, err = apiOpen(&info, api.DialOpts{})
	}
	if err != nil {
		if params.IsCodeNotProvisioned(err) {
			return nil, nil, worker.ErrTerminateAgent
		}
		if params.IsCodeUnauthorized(err) {
			return nil, nil, worker.ErrTerminateAgent
		}
		return nil, nil, err
	}
	defer func() {
		if err != nil {
			st.Close()
		}
	}()
	entity, err := st.Agent().Entity(a.Tag())
	if err == nil && entity.Life() == params.Dead {
		return nil, nil, worker.ErrTerminateAgent
	}
	if err != nil {
		if params.IsCodeUnauthorized(err) {
			return nil, nil, worker.ErrTerminateAgent
		}
		return nil, nil, err
	}
	if usedOldPassword {
		// We succeeded in connecting with the fallback
		// password, so we need to create a new password
		// for the future.

		newPassword, err := utils.RandomPassword()
		if err != nil {
			return nil, nil, err
		}
		// Change the configuration *before* setting the entity
		// password, so that we avoid the possibility that
		// we might successfully change the entity's
		// password but fail to write the configuration,
		// thus locking us out completely.
		if err := a.ChangeConfig(func(c agent.ConfigSetter) {
			c.SetPassword(newPassword)
			c.SetOldPassword(info.Password)
		}); err != nil {
			return nil, nil, err
		}
		if err := entity.SetPassword(newPassword); err != nil {
			return nil, nil, err
		}
	}

	return st, entity, nil
}