Implementation of Floating IPs

[gabrik]

This implements the possibility to assing a Floating IP, and IP address in the same network of the physical one of the node, to a running FDU. Solves #111

To enable this 4 new APIs are added:

• FIMAPI.network.create_floating_ip( nodeid )
• FIMAPI.network.assign_floating_ip( nodeid, floating ip id, connection point id)
• FIMAPI.network.retain_floating_ip( nodeid, floating ip id, connection point id)
• FIMAPI.network.delete_floating_ip( nodeid, floating ip id)

Example of usage:

>>> from fog05 import FIMAPI; a=FIMAPI()
>>> fip = a.network.create_floating_ip('4a560914-1c3e-4966-9fa8-7f0acc903253')
>>> fip
{'result': {'uuid': 'fff134fe-5d6c-402f-983d-1800a610405a', 'ip_version': 'IPV4', 'address': '192.168.86.208/24'}}
>>> a.fdu.instance_info('a5ae5fbb-fb4b-48a8-ac93-2123d5f7b10e')
{'fdu_uuid': '1e57bb0e-cb41-4b23-bca3-1fa761a83c02', 'node': '4a560914-1c3e-4966-9fa8-7f0acc903253', 'uuid': 'a5ae5fbb-fb4b-48a8-ac93-2123d5f7b10e', 'status': 'RUN', 'interfaces': [{'vintf_name': 'eth0', 'status': 'CREATE', 'if_type': 'VIRTIO', 'mac_address': 'be:ef:be:ef:00:01', 'cp_id': 'cc4b97d2-baf7-4006-a928-7710e83c8a7c'}], 'connection_points': [{'uuid': 'cc4b97d2-baf7-4006-a928-7710e83c8a7c', 'status': 'CREATE', 'cp_uuid': 'a47a8819-72e5-4b4e-86fd-fc30c9fda68b'}], 'hypervisor_info': {'network': {'eth0': {'hwaddr': 'be:ef:be:ef:00:01', 'addresses': [{'address': '192.168.234.10'}]}}, 'cpu': {'usage': 2709500253}, 'memory': {'usage': 11534336, 'usage_peak': 20119552, 'swap_usage': 0, 'swap_usage_peak': 0}}, 'accelerators': {'fpga': [], 'gpu': []}, 'io_ports': []}
a.network.assign_floating_ip('4a560914-1c3e-4966-9fa8-7f0acc903253','fff134fe-5d6c-402f-983d-1800a610405a','cc4b97d2-baf7-4006-a928-7710e83c8a7c')
{'result': {'uuid': 'fff134fe-5d6c-402f-983d-1800a610405a', 'ip_version': 'IPV4', 'address': '192.168.86.208/24'}}
>>> a.network.retain_floating_ip('4a560914-1c3e-4966-9fa8-7f0acc903253','fff134fe-5d6c-402f-983d-1800a610405a','cc4b97d2-baf7-4006-a928-7710e83c8a7c')