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neutron-tenant-net
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neutron-tenant-net
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#!/usr/bin/env python
# While this works with python3, other requirements in the
# venv aren't quite py3-ready.
from keystoneauth1.identity import v2
from keystoneauth1 import session
from keystoneclient.v2_0 import client as keystone_client
from neutronclient.v2_0 import client as neutron_client
import optparse
import os
import sys
import logging
usage = """Usage: %prog [options] name cidr
For example:
%prog -t admin -r provider-router admin_net 10.5.5.0/24
will create a new network for the admin tenant called 'admin_net' with a
default gateway of 10.5.5.1 and a dhcp allocation range of
10.5.5.2->10.5.5.254
"""
if __name__ == '__main__':
parser = optparse.OptionParser(usage)
parser.add_option('-t', '--tenant',
help='Tenant name to create network for',
dest='tenant', action='store',
default=None)
parser.add_option('-s', '--shared',
help='Create a shared rather than private network',
dest='shared', action='store_true', default=False)
parser.add_option('-r', '--router',
help='Router to plug new network into',
dest='router', action='store', default=None)
parser.add_option("-d", "--debug",
help="Enable debug logging",
dest="debug", action="store_true", default=False)
parser.add_option("-D", "--disable-dhcp",
help="Disable dhcp on network",
dest="dhcp", action="store_false", default=True)
parser.add_option("-N", "--dns-nameservers",
help="Comma separated list of dns servers to use.",
dest="dns_servers", action="store", default=None)
parser.add_option("--network-type",
help="Network type.",
dest="network_type", action="store", default='gre')
(opts, args) = parser.parse_args()
if len(args) != 2:
parser.print_help()
sys.exit(1)
if opts.debug:
logging.basicConfig(level=logging.DEBUG)
else:
logging.basicConfig(level=logging.INFO)
net_name = args[0]
subnet_name = "{}_subnet".format(net_name)
cidr = args[1]
auth = v2.Password(auth_url=os.environ['OS_AUTH_URL'],
username=os.environ['OS_USERNAME'],
password=os.environ['OS_PASSWORD'],
tenant_name=os.environ['OS_TENANT_NAME'])
sess = session.Session(auth=auth)
keystone = keystone_client.Client(session=sess)
quantum = neutron_client.Client(username=os.environ['OS_USERNAME'],
password=os.environ['OS_PASSWORD'],
tenant_name=os.environ['OS_TENANT_NAME'],
auth_url=os.environ['OS_AUTH_URL'],
region_name=os.environ['OS_REGION_NAME'])
# Resolve tenant id
tenant_id = None
for tenant in [t._info for t in keystone.tenants.list()]:
if (tenant['name'] == (opts.tenant or os.environ['OS_TENANT_NAME'])):
tenant_id = tenant['id']
break # Tenant ID found - stop looking
if not tenant_id:
logging.error("Unable to locate tenant id for %s.", opts.tenant)
sys.exit(1)
# Create network
networks = quantum.list_networks(name=net_name)
if len(networks['networks']) == 0:
logging.info('Creating tenant network: %s', net_name)
network_msg = {
'network': {
'name': net_name,
'shared': opts.shared,
'tenant_id': tenant_id,
'provider:network_type': opts.network_type,
}
}
if opts.network_type == 'vxlan':
network_msg['network']['provider:segmentation_id'] = 1233
elif opts.network_type == 'vlan':
network_msg['network']['provider:segmentation_id'] = 5
network_msg['network']['provider:physical_network'] = 'physnet1'
else:
network_msg['network']['provider:segmentation_id'] = 5
network = quantum.create_network(network_msg)['network']
else:
logging.warning('Network %s already exists.', net_name)
network = networks['networks'][0]
# Create subnet
subnets = quantum.list_subnets(name=subnet_name)
if len(subnets['subnets']) == 0:
logging.info('Creating subnet for %s',
net_name)
subnet_msg = {
'subnet': {
'name': subnet_name,
'network_id': network['id'],
'enable_dhcp': opts.dhcp,
'cidr': cidr,
'ip_version': 4,
'tenant_id': tenant_id
}
}
subnet = quantum.create_subnet(subnet_msg)['subnet']
else:
logging.warning('Subnet %s already exists.', subnet_name)
subnet = subnets['subnets'][0]
# Update dns_nameservers
if opts.dns_servers:
msg = {
'subnet': {
'dns_nameservers': opts.dns_servers.split(',')
}
}
logging.info('Updating dns_nameservers (%s) for subnet %s',
opts.dns_servers,
subnet_name)
quantum.update_subnet(subnet['id'], msg)
# Plug subnet into router if provided
if opts.router:
routers = quantum.list_routers(name=opts.router)
if len(routers['routers']) == 0:
logging.error('Unable to locate provider router %s', opts.router)
sys.exit(1)
else:
# Check to see if subnet already plugged into router
ports = quantum.list_ports(device_owner='network:router_interface',
network_id=network['id'])
ha_ports = quantum.list_ports(
device_owner='network:ha_router_replicated_interface',
network_id=network['id'])
if len(ports['ports'] + ha_ports['ports']) == 0:
logging.info('Adding interface from %s to %s',
opts.router, subnet_name)
router = routers['routers'][0]
quantum.add_interface_router(router['id'],
{'subnet_id': subnet['id']})
else:
logging.warning('Router already connected to subnet')