nova-cloud-controller (nova-network) doesn't offer the vlan manager option

[Shang Wu]

According to the https://demo.jujucharms.com/trusty/nova-cloud-controller-58, the default option[1] for network-manager is FlatDHCPManager, instead of the default option from OpenStack- VLAN Network Manager[2].

Is there a way to use VLAN Manager on nova-cloud-controller?

[1] Default Charm options:
 network-manager string
    Default: FlatDHCPManager

Network manager for the cloud; supports the following options . FlatDHCPManager (nova-network) (default) FlatManager (nova-network) Neutron|Quantum (Full SDN solution) . When using the Neutron option you will most likely want to use the neutron-gateway charm to provide L3 routing and DHCP Services.

[2] http://docs.openstack.org/admin-guide-cloud/content/section_networking-options.html

"VLAN Network Manager

    This is the default mode for OpenStack Compute. In this mode, Compute creates a VLAN and bridge for each tenant. For multiple-machine installations, the VLAN Network Mode requires a switch that supports VLAN tagging (IEEE 802.1Q). The tenant gets a range of private IPs that are only accessible from inside the VLAN. In order for a user to access the instances in their tenant, a special VPN instance (code named cloudpipe) needs to be created. Compute generates a certificate and key for the user to access the VPN and starts the VPN automatically. It provides a private network segment for each tenant's instances that can be accessed through a dedicated VPN connection from the internet. In this mode, each tenant gets its own VLAN, Linux networking bridge, and subnet.

    The subnets are specified by the network administrator, and are assigned dynamically to a tenant when required. A DHCP server is started for each VLAN to pass out IP addresses to VM instances from the subnet assigned to the tenant. All instances belonging to one tenant are bridged into the same VLAN for that tenant. OpenStack Compute creates the Linux networking bridges and VLANs when required."