Networking
To use the information in this section, you should have a
general understanding of OpenStack Networking, OpenStack
Compute, and the integration between the two. You should also
have access to a plug-in that implements the Networking API
v2.0.
Set environment variables
Make sure that you set the relevant environment
variables.
As an example, see the sample shell file that sets these
variables to get credentials:
export OS_USERNAME="admin"
export OS_PASSWORD="password"
export OS_TENANT_NAME="admin"
export OS_AUTH_URL="http://IPADDRESS/v2.0"
Get credentials
The examples in this section use the
get_credentials method:
def get_credentials():
d = {}
d['username'] = os.environ['OS_USERNAME']
d['password'] = os.environ['OS_PASSWORD']
d['auth_url'] = os.environ['OS_AUTH_URL']
d['tenant_name'] = os.environ['OS_TENANT_NAME']
return d
This code resides in the
credentials.py file, which all
samples import.
Use the get_credentials() method to
populate and get a dictionary:
credentials = get_credentials()
Get Nova credentials
Few examples in this section use the
get_nova_credentials method:
def get_nova_credentials():
d = {}
d['username'] = os.environ['OS_USERNAME']
d['api_key'] = os.environ['OS_PASSWORD']
d['auth_url'] = os.environ['OS_AUTH_URL']
d['project_id'] = os.environ['OS_TENANT_NAME']
return d
This code resides in the
credentials.py file, which all
samples import.
Use the get_nova_credentials() method to
populate and get a dictionary:
nova_credentials = get_nova_credentials()
Print values
The examples in this section use the
print_values and print_values_server
methods:
def print_values(val, type):
if type == 'ports':
val_list = val['ports']
if type == 'networks':
val_list = val['networks']
if type == 'routers':
val_list = val['routers']
for p in val_list:
for k, v in p.items():
print("%s : %s" % (k, v))
print('\n')
def print_values_server(val, server_id, type):
if type == 'ports':
val_list = val['ports']
if type == 'networks':
val_list = val['networks']
for p in val_list:
bool = False
for k, v in p.items():
if k == 'device_id' and v == server_id:
bool = True
if bool:
for k, v in p.items():
print("%s : %s" % (k, v))
print('\n')
This code resides in the
utils.py file, which all samples import.
Create network
The following program creates a network:
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
network_name = 'sample_network'
credentials = get_credentials()
neutron = client.Client(**credentials)
try:
body_sample = {'network': {'name': network_name,
'admin_state_up': True}}
netw = neutron.create_network(body=body_sample)
net_dict = netw['network']
network_id = net_dict['id']
print('Network %s created' % network_id)
body_create_subnet = {'subnets': [{'cidr': '192.168.199.0/24',
'ip_version': 4, 'network_id': network_id}]}
subnet = neutron.create_subnet(body=body_create_subnet)
print('Created subnet %s' % subnet)
finally:
print("Execution completed")
List networks
The following program lists networks:
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
credentials = get_credentials()
neutron = client.Client(**credentials)
netw = neutron.list_networks()
print_values(netw, 'networks')
For print_values see .
Create ports
The following program creates a port:
#!/usr/bin/env python
from neutronclient.v2_0 import client
import novaclient.v1_1.client as nvclient
from credentials import get_credentials
from credentials import get_nova_credentials
credentials = get_nova_credentials()
nova_client = nvclient.Client(**credentials)
# Replace with server_id and network_id from your environment
server_id = '9a52795a-a70d-49a8-a5d0-5b38d78bd12d'
network_id = 'ce5d204a-93f5-43ef-bd89-3ab99ad09a9a'
server_detail = nova_client.servers.get(server_id)
print(server_detail.id)
if server_detail != None:
credentials = get_credentials()
neutron = client.Client(**credentials)
body_value = {
"port": {
"admin_state_up": True,
"device_id": server_id,
"name": "port1",
"network_id": network_id
}
}
response = neutron.create_port(body=body_value)
print(response)
For get_nova_credentials see .
For get_credentials see .
List ports
The following program lists ports:
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
credentials = get_credentials()
neutron = client.Client(**credentials)
ports = neutron.list_ports()
print_values(ports, 'ports')
For get_credentials see .
For print_values see .
List server ports
The following program lists the ports for a
server:
#!/usr/bin/env python
from neutronclient.v2_0 import client
import novaclient.v1_1.client as nvclient
from credentials import get_credentials
from credentials import get_nova_credentials
from utils import print_values_server
credentials = get_nova_credentials()
nova_client = nvclient.Client(**credentials)
# change these values according to your environment
server_id = '9a52795a-a70d-49a8-a5d0-5b38d78bd12d'
network_id = 'ce5d204a-93f5-43ef-bd89-3ab99ad09a9a'
server_detail = nova_client.servers.get(server_id)
print(server_detail.id)
if server_detail is not None:
credentials = get_credentials()
neutron = client.Client(**credentials)
ports = neutron.list_ports()
print_values_server(ports, server_id, 'ports')
body_value = {'port': {
'admin_state_up': True,
'device_id': server_id,
'name': 'port1',
'network_id': network_id,
}}
response = neutron.create_port(body=body_value)
print(response)
Create router and add port to subnet
This example queries OpenStack Networking to create a
router and add a port to a subnet.
To create a router and add a port to a
subnet
Import the following modules:
from neutronclient.v2_0 import client
import novaclient.v1_1.client as nvclient
from credentials import get_credentials
from credentials import get_nova_credentials
from utils import print_values_server
Get Nova Credentials. See .
Instantiate the nova_client
client object by using the
credentials dictionary
object:
nova_client = nvclient.Client(**credentials)
Create a router and add a port to the
subnet:
# Replace with server_id and network_id from your environment
router_id = '72cf1682-60a8-4890-b0ed-6bad7d9f5466'
network_id = '81bf592a-9e3f-4f84-a839-ae87df188dc1'
credentials = get_credentials()
neutron = client.Client(**credentials)
router = neutron.show_router(router_id)
print(router)
body_value = {'port': {
'admin_state_up': True,
'device_id': router_id,
'name': 'port1',
'network_id': network_id,
}}
response = neutron.create_port(body=body_value)
print(response)
print("Execution Completed")
Create router: complete code listing
#!/usr/bin/env python
from neutronclient.v2_0 import client
import novaclient.v1_1.client as nvclient
from credentials import get_credentials
from credentials import get_nova_credentials
from utils import print_values_server
credentials = get_nova_credentials()
nova_client = nvclient.Client(**credentials)
# Replace with server_id and network_id from your environment
router_id = '72cf1682-60a8-4890-b0ed-6bad7d9f5466'
network_id = '81bf592a-9e3f-4f84-a839-ae87df188dc1'
try:
credentials = get_credentials()
neutron = client.Client(**credentials)
router = neutron.show_router(router_id)
print(router)
body_value = {'port': {
'admin_state_up': True,
'device_id': router_id,
'name': 'port1',
'network_id': network_id,
}}
response = neutron.create_port(body=body_value)
print(response)
finally:
print("Execution completed")
Delete a network
This example queries OpenStack Networking to delete a
network.
To delete a network
Import the following modules:
from neutronclient.v2_0 import client
from credentials import get_credentials
Get credentials. See .
Instantiate the neutron
client object by using the
credentials dictionary
object:
neutron = client.Client(**credentials)
Delete the network:
body_sample = {'network': {'name': network_name,
'admin_state_up': True}}
netw = neutron.create_network(body=body_sample)
net_dict = netw['network']
network_id = net_dict['id']
print('Network %s created' % network_id)
body_create_subnet = {'subnets': [{'cidr': '192.168.199.0/24',
'ip_version': 4, 'network_id': network_id}]}
subnet = neutron.create_subnet(body=body_create_subnet)
print('Created subnet %s' % subnet)
neutron.delete_network(network_id)
print('Deleted Network %s' % network_id)
print("Execution completed")
Delete network: complete code listing
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
network_name = 'temp_network'
credentials = get_credentials()
neutron = client.Client(**credentials)
try:
body_sample = {'network': {'name': network_name,
'admin_state_up': True}}
netw = neutron.create_network(body=body_sample)
net_dict = netw['network']
network_id = net_dict['id']
print('Network %s created' % network_id)
body_create_subnet = {'subnets': [{'cidr': '192.168.199.0/24',
'ip_version': 4, 'network_id': network_id}]}
subnet = neutron.create_subnet(body=body_create_subnet)
print('Created subnet %s' % subnet)
neutron.delete_network(network_id)
print('Deleted Network %s' % network_id)
finally:
print("Execution Completed")
List routers
This example queries OpenStack Networking to list all
routers.
To list routers
Import the following modules:
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
Get credentials. See .
Instantiate the neutron
client object by using the
credentials dictionary
object:
neutron = client.Client(**credentials)
List the routers
routers_list = neutron.list_routers(retrieve_all=True)
print_values(routers_list, 'routers')
print("Execution completed")
For print_values see .
List routers: complete code listing
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
try:
credentials = get_credentials()
neutron = client.Client(**credentials)
routers_list = neutron.list_routers(retrieve_all=True)
print_values(routers_list, 'routers')
finally:
print("Execution completed")
List security groups
This example queries OpenStack Networking to list
security groups.
To list security groups
Import the following modules:
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
Get credentials. See .
Instantiate the neutron
client object by using the
credentials dictionary
object:
neutron = client.Client(**credentials)
List Security groups
sg = neutron.list_security_groups()
print(sg)
List security groups: complete code listing
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
credentials = get_credentials()
neutron = client.Client(**credentials)
sg = neutron.list_security_groups()
print(sg)
OpenStack Networking security groups are
case-sensitive while the nova-network security groups are
case-insensitive.
List subnets
This example queries OpenStack Networking to list
subnets.
To list subnets
Import the following modules:
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
Get credentials. See .
Instantiate the neutron
client object by using the
credentials dictionary
object:
neutron = client.Client(**credentials)
List subnets:
subnets = neutron.list_subnets()
print(subnets)
List subnets: complete code listing
#!/usr/bin/env python
from neutronclient.v2_0 import client
from credentials import get_credentials
from utils import print_values
credentials = get_credentials()
neutron = client.Client(**credentials)
subnets = neutron.list_subnets()
print(subnets)