def verify_subnet_exists(self, context, tenant_id, quantum_net_id):
"""Confirms that a subnet exists that is associated with the
specified Quantum Network UUID. Raises an exception if no
such subnet exists.
"""
admin_context = context.elevated()
net = db.network_get_by_uuid(admin_context, quantum_net_id)
return net is not None
def get_networks_by_tenant(self, admin_context, tenant_id):
nets = []
blocks = self.m_conn.get_blocks(tenant_id)
for ip_block in blocks['ip_blocks']:
network_id = ip_block['network_id']
network = db.network_get_by_uuid(admin_context, network_id)
nets.append(network)
return nets
def get_networks_by_tenant(self, admin_context, tenant_id):
nets = []
blocks = self.m_conn.get_blocks(tenant_id)
for ip_block in blocks['ip_blocks']:
network_id = ip_block['network_id']
network = db.network_get_by_uuid(admin_context, network_id)
nets.append(network)
return nets
def delete_subnets_by_net_id(self, context, net_id, project_id):
"""Deletes a network based on Quantum UUID. Uses FlatManager
delete_network to avoid duplication.
"""
admin_context = context.elevated()
network = db.network_get_by_uuid(admin_context, net_id)
if not network:
raise Exception(_("No network with net_id = %s" % net_id))
manager.FlatManager.delete_network(self.net_manager,
admin_context, None,
network['uuid'],
require_disassociated=False)
def delete_subnets_by_net_id(self, context, net_id, project_id):
"""Find Melange block associated with the Quantum UUID,
then tell Melange to delete that block.
"""
admin_context = context.elevated()
tenant_id = project_id or FLAGS.quantum_default_tenant_id
all_blocks = self.m_conn.get_blocks(tenant_id)
for b in all_blocks['ip_blocks']:
if b['network_id'] == net_id:
self.m_conn.delete_block(b['id'], tenant_id)
network = db.network_get_by_uuid(admin_context, net_id)
db.network_delete_safe(context, network['id'])
def delete_subnets_by_net_id(self, context, net_id, project_id):
"""Find Melange block associated with the Quantum UUID,
then tell Melange to delete that block.
"""
admin_context = context.elevated()
tenant_id = project_id or FLAGS.quantum_default_tenant_id
all_blocks = self.m_conn.get_blocks(tenant_id)
for b in all_blocks['ip_blocks']:
if b['network_id'] == net_id:
self.m_conn.delete_block(b['id'], tenant_id)
network = db.network_get_by_uuid(admin_context, net_id)
db.network_delete_safe(context, network['id'])
def get_v6_ips_by_interface(self, context, net_id, vif_id, project_id):
"""Returns a list containing a single IPv6 address strings
associated with the specified virtual interface.
"""
admin_context = context.elevated()
network = db.network_get_by_uuid(admin_context, net_id)
vif_rec = db.virtual_interface_get_by_uuid(context, vif_id)
if network['cidr_v6']:
ip = ipv6.to_global(network['cidr_v6'],
vif_rec['address'],
project_id)
return [ip]
return []
def allocate_fixed_ip(self, context, tenant_id, quantum_net_id, vif_rec):
"""Allocates a single fixed IPv4 address for a virtual interface."""
admin_context = context.elevated()
network = db.network_get_by_uuid(admin_context, quantum_net_id)
address = None
if network['cidr']:
address = db.fixed_ip_associate_pool(admin_context,
network['id'],
vif_rec['instance_id'])
values = {'allocated': True,
'virtual_interface_id': vif_rec['id']}
db.fixed_ip_update(admin_context, address, values)
return address
def get_allocated_ips(self, context, subnet_id, project_id):
"""Returns a list of (ip, vif_id) pairs"""
admin_context = context.elevated()
ips = db.fixed_ip_get_all(admin_context)
allocated_ips = []
# Get all allocated IPs that are part of this subnet
network = db.network_get_by_uuid(admin_context, subnet_id)
for ip in ips:
# Skip unallocated IPs
if not ip['allocated'] == 1:
continue
if ip['network_id'] == network['id']:
vif = db.virtual_interface_get(admin_context,
ip['virtual_interface_id'])
allocated_ips.append((ip['address'], vif['uuid']))
return allocated_ips
def get_subnets_by_net_id(self, context, tenant_id, net_id, _vif_id=None):
"""Returns information about the IPv4 and IPv6 subnets
associated with a Quantum Network UUID.
"""
n = db.network_get_by_uuid(context.elevated(), net_id)
subnet_data_v4 = {
'network_id': n['uuid'],
'cidr': n['cidr'],
'gateway': n['gateway'],
'broadcast': n['broadcast'],
'netmask': n['netmask'],
'dns1': n['dns1'],
'dns2': n['dns2']}
subnet_data_v6 = {
'network_id': n['uuid'],
'cidr': n['cidr_v6'],
'gateway': n['gateway_v6'],
'broadcast': None,
'netmask': None,
'dns1': None,
'dns2': None}
return (subnet_data_v4, subnet_data_v6)
def allocate_for_instance(self, context, **kwargs):
"""Called by compute when it is creating a new VM.
There are three key tasks:
- Determine the number and order of vNICs to create
- Allocate IP addresses
- Create ports on a Quantum network and attach vNICs.
We support two approaches to determining vNICs:
- By default, a VM gets a vNIC for any network belonging
to the VM's project, and a vNIC for any "global" network
that has a NULL project_id. vNIC order is determined
by the network's 'priority' field.
- If the 'os-create-server-ext' was used to create the VM,
only the networks in 'requested_networks' are used to
create vNICs, and the vNIC order is determiend by the
order in the requested_networks array.
For each vNIC, use the FlatManager to create the entries
in the virtual_interfaces table, contact Quantum to
create a port and attachment the vNIC, and use the IPAM
lib to allocate IP addresses.
"""
instance_id = kwargs.pop('instance_id')
instance_type_id = kwargs['instance_type_id']
host = kwargs.pop('host')
project_id = kwargs.pop('project_id')
LOG.debug(_("network allocations for instance %s"), project_id)
requested_networks = kwargs.get('requested_networks')
if requested_networks:
net_proj_pairs = [(net_id, project_id) \
for (net_id, _i) in requested_networks]
else:
net_proj_pairs = self.ipam.get_project_and_global_net_ids(context,
project_id)
# Quantum may also know about networks that aren't in the networks
# table so we need to query Quanutm for any tenant networks and add
# them to net_proj_pairs.
qnets = self.q_conn.get_networks(project_id)
for qn in qnets['networks']:
pair = (qn['id'], project_id)
if pair not in net_proj_pairs:
net_proj_pairs.append(pair)
# Create a port via quantum and attach the vif
for (quantum_net_id, project_id) in net_proj_pairs:
# FIXME(danwent): We'd like to have the manager be
# completely decoupled from the engine networks table.
# However, other parts of engine sometimes go behind our
# back and access network data directly from the DB. So
# for now, the quantum manager knows that there is a engine
# networks DB table and accesses it here. updating the
# virtual_interfaces table to use UUIDs would be one
# solution, but this would require significant work
# elsewhere.
admin_context = context.elevated()
# We may not be able to get a network_ref here if this network
# isn't in the database (i.e. it came from Quantum).
network_ref = db.network_get_by_uuid(admin_context,
quantum_net_id)
if network_ref is None:
network_ref = {}
network_ref = {"uuid": quantum_net_id,
"project_id": project_id,
# NOTE(bgh): We need to document this somewhere but since
# we don't know the priority of any networks we get from
# quantum we just give them a priority of 0. If its
# necessary to specify the order of the vifs and what
# network they map to then the user will have to use the
# OSCreateServer extension and specify them explicitly.
#
# In the future users will be able to tag quantum networks
# with a priority .. and at that point we can update the
# code here to reflect that.
"priority": 0,
"id": 'NULL',
"label": "quantum-net-%s" % quantum_net_id}
vif_rec = self.add_virtual_interface(context,
instance_id,
network_ref['id'])
# talk to Quantum API to create and attach port.
instance = db.instance_get(context, instance_id)
instance_type = instance_types.get_instance_type(instance_type_id)
rxtx_factor = instance_type['rxtx_factor']
engine_id = self._get_engine_id(context)
q_tenant_id = project_id or FLAGS.quantum_default_tenant_id
self.q_conn.create_and_attach_port(q_tenant_id, quantum_net_id,
vif_rec['uuid'],
vm_id=instance['uuid'],
rxtx_factor=rxtx_factor,
engine_id=engine_id)
# Tell melange to allocate an IP
ip = self.ipam.allocate_fixed_ip(context, project_id,
quantum_net_id, vif_rec)
# Set up/start the dhcp server for this network if necessary
if FLAGS.quantum_use_dhcp:
self.enable_dhcp(context, quantum_net_id, network_ref,
vif_rec, project_id)
return self.get_instance_nw_info(context, instance_id,
instance_type_id, host)
