func (d *Driver) assignFloatingIP() error {
	var err error

	if d.ComputeNetwork {
		err = d.initCompute()
	} else {
		err = d.initNetwork()
	}

	if err != nil {
		return err
	}

	ips, err := d.client.GetFloatingIPs(d)
	if err != nil {
		return err
	}

	var floatingIP *FloatingIP

	log.WithFields(log.Fields{
		"MachineId": d.MachineId,
		"Pool":      d.FloatingIpPool,
	}).Debugf("Looking for an available floating IP")

	for _, ip := range ips {
		if ip.PortId == "" {
			log.WithFields(log.Fields{
				"MachineId": d.MachineId,
				"IP":        ip.Ip,
			}).Debugf("Available floating IP found")
			floatingIP = &ip
			break
		}
	}

	if floatingIP == nil {
		floatingIP = &FloatingIP{}
		log.WithField("MachineId", d.MachineId).Debugf("No available floating IP found. Allocating a new one...")
	} else {
		log.WithField("MachineId", d.MachineId).Debugf("Assigning floating IP to the instance")
	}

	if err := d.client.AssignFloatingIP(d, floatingIP); err != nil {
		return err
	}
	d.IPAddress = floatingIP.Ip
	return nil
}

func (d *Driver) GetState() (state.State, error) {
	log.WithField("MachineId", d.MachineId).Debug("Get status for OpenStack instance...")
	if err := d.initCompute(); err != nil {
		return state.None, err
	}

	s, err := d.client.GetInstanceState(d)
	if err != nil {
		return state.None, err
	}

	log.WithFields(log.Fields{
		"MachineId": d.MachineId,
		"State":     s,
	}).Debug("State for OpenStack instance")

	switch s {
	case "ACTIVE":
		return state.Running, nil
	case "PAUSED":
		return state.Paused, nil
	case "SUSPENDED":
		return state.Saved, nil
	case "SHUTOFF":
		return state.Stopped, nil
	case "BUILDING":
		return state.Starting, nil
	case "ERROR":
		return state.Error, nil
	}
	return state.None, nil
}

// Authenticate creates a Rackspace-specific Gophercloud client.
func (c *Client) Authenticate(d *openstack.Driver) error {
	if c.Provider != nil {
		return nil
	}

	log.WithFields(log.Fields{
		"Username": d.Username,
	}).Debug("Authenticating to Rackspace.")

	apiKey := c.driver.APIKey
	opts := gophercloud.AuthOptions{
		Username: d.Username,
		APIKey:   apiKey,
	}

	provider, err := rackspace.NewClient(rackspace.RackspaceUSIdentity)
	if err != nil {
		return err
	}

	provider.UserAgent.Prepend(fmt.Sprintf("docker-machine/v%d", version.ApiVersion))

	err = rackspace.Authenticate(provider, opts)
	if err != nil {
		return err
	}

	c.Provider = provider

	return nil
}

// GetState return instance status
func (d *Driver) GetState() (state.State, error) {
	log.WithField("MachineId", d.InstanceID).Debug("Get status for OVH instance...")

	client := d.getClient()

	instance, err := client.GetInstance(d.ProjectID, d.InstanceID)
	if err != nil {
		return state.None, err
	}

	log.WithFields(log.Fields{
		"MachineId": d.InstanceID,
		"State":     instance.Status,
	}).Debug("State for OVH instance")

	switch instance.Status {
	case "ACTIVE":
		return state.Running, nil
	case "PAUSED":
		return state.Paused, nil
	case "SUSPENDED":
		return state.Saved, nil
	case "SHUTOFF":
		return state.Stopped, nil
	case "BUILDING":
		return state.Starting, nil
	case "ERROR":
		return state.Error, nil
	}

	return state.None, nil
}

// NewDriver instantiates a Rackspace driver.
func NewDriver(machineName, storePath string) drivers.Driver {
	log.WithFields(log.Fields{
		"machineName": machineName,
	}).Debug("Instantiating Rackspace driver.")

	inner := openstack.NewDerivedDriver(machineName, storePath)

	return &Driver{
		Driver: inner,
	}
}

func (d *Driver) lookForIpAddress() error {
	ip, err := d.GetIP()
	if err != nil {
		return err
	}
	d.IPAddress = ip
	log.WithFields(log.Fields{
		"IP":        ip,
		"MachineId": d.MachineId,
	}).Debug("IP address found")
	return nil
}

// Create a new docker machine instance on OVH Cloud
func (d *Driver) Create() error {
	client := d.getClient()

	// Ensure ssh key
	err := d.ensureSSHKey()
	if err != nil {
		return err
	}

	// Create instance
	log.Debug("Creating OVH instance...")
	instance, err := client.CreateInstance(
		d.ProjectID,
		d.MachineName,
		d.KeyPairID,
		d.FlavorID,
		d.ImageID,
		d.RegionName,
		false,
	)
	if err != nil {
		return err
	}
	d.InstanceID = instance.Id

	// Wait until instance is ACTIVE
	log.WithField("MachineId", d.InstanceID).Debug("Waiting for OVH instance...")
	instance, err = d.waitForInstanceStatus("ACTIVE")
	if err != nil {
		return err
	}

	// Save Ip address
	d.IPAddress = ""
	for _, ip := range instance.IpAddresses {
		if ip.Type == "public" {
			d.IPAddress = ip.Ip
			break
		}
	}

	if d.IPAddress == "" {
		return fmt.Errorf("No IP found for instance %s", instance.Id)
	}

	log.WithFields(log.Fields{
		"IP":        d.IPAddress,
		"MachineId": d.InstanceID,
	}).Debug("IP address found")

	// All done !
	return nil
}

func (c *GenericClient) Authenticate(d *Driver) error {
	if c.Provider != nil {
		return nil
	}

	log.WithFields(log.Fields{
		"AuthUrl":    d.AuthUrl,
		"Insecure":   d.Insecure,
		"DomainID":   d.DomainID,
		"DomainName": d.DomainName,
		"Username":   d.Username,
		"TenantName": d.TenantName,
		"TenantID":   d.TenantId,
	}).Debug("Authenticating...")

	opts := gophercloud.AuthOptions{
		IdentityEndpoint: d.AuthUrl,
		DomainID:         d.DomainID,
		DomainName:       d.DomainName,
		Username:         d.Username,
		Password:         d.Password,
		TenantName:       d.TenantName,
		TenantID:         d.TenantId,
		AllowReauth:      true,
	}

	provider, err := openstack.NewClient(opts.IdentityEndpoint)
	if err != nil {
		return err
	}

	provider.UserAgent.Prepend(fmt.Sprintf("docker-machine/v%d", version.ApiVersion))

	if d.Insecure {
		// Configure custom TLS settings.
		config := &tls.Config{InsecureSkipVerify: true}
		transport := &http.Transport{TLSClientConfig: config}
		provider.HTTPClient.Transport = transport
	}

	err = openstack.Authenticate(provider, opts)
	if err != nil {
		return err
	}

	c.Provider = provider

	return nil
}

func (d *Driver) createMachine() error {
	log.WithFields(log.Fields{
		"FlavorId": d.FlavorId,
		"ImageId":  d.ImageId,
	}).Debug("Creating OpenStack instance...")

	if err := d.initCompute(); err != nil {
		return err
	}
	instanceId, err := d.client.CreateInstance(d)
	if err != nil {
		return err
	}
	d.MachineId = instanceId
	return nil
}

func (d *Driver) resolveIds() error {
	if d.NetworkName != "" {
		if err := d.initNetwork(); err != nil {
			return err
		}

		networkId, err := d.client.GetNetworkId(d)

		if err != nil {
			return err
		}

		if networkId == "" {
			return fmt.Errorf(errorUnknownNetworkName, d.NetworkName)
		}

		d.NetworkId = networkId
		log.WithFields(log.Fields{
			"Name": d.NetworkName,
			"ID":   d.NetworkId,
		}).Debug("Found network id using its name")
	}

	if d.FlavorName != "" {
		if err := d.initCompute(); err != nil {
			return err
		}
		flavorId, err := d.client.GetFlavorId(d)

		if err != nil {
			return err
		}

		if flavorId == "" {
			return fmt.Errorf(errorUnknownFlavorName, d.FlavorName)
		}

		d.FlavorId = flavorId
		log.WithFields(log.Fields{
			"Name": d.FlavorName,
			"ID":   d.FlavorId,
		}).Debug("Found flavor id using its name")
	}

	if d.ImageName != "" {
		if err := d.initCompute(); err != nil {
			return err
		}
		imageId, err := d.client.GetImageId(d)

		if err != nil {
			return err
		}

		if imageId == "" {
			return fmt.Errorf(errorUnknownImageName, d.ImageName)
		}

		d.ImageId = imageId
		log.WithFields(log.Fields{
			"Name": d.ImageName,
			"ID":   d.ImageId,
		}).Debug("Found image id using its name")
	}

	if d.FloatingIpPool != "" {
		if err := d.initNetwork(); err != nil {
			return err
		}
		f, err := d.client.GetFloatingIpPoolId(d)

		if err != nil {
			return err
		}

		if f == "" {
			return fmt.Errorf(errorUnknownNetworkName, d.FloatingIpPool)
		}

		d.FloatingIpPoolId = f
		log.WithFields(log.Fields{
			"Name": d.FloatingIpPool,
			"ID":   d.FloatingIpPoolId,
		}).Debug("Found floating IP pool id using its name")
	}

	return nil
}