Step 10: Get access to the Internet: Create a network
Start
So far, you have created a VM and a security group.
The next step is to create a network.
The network
You will start with the network. As with previous commands, you have additional options you can list with --help.
To create your network use the following command:
$ openstack network create BeispielNetzwerk
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | UP |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2017-12-08T12:06:38Z |
| description | |
| dns_domain | None |
| id | ff6d8654-66d6-4881-9528-2686bddcb6dc |
| ipv4_address_scope | None |
| ipv6_address_scope | None |
| is_default | False |
| mtu | 1500 |
| name | BeispielNetzwerk |
| port_security_enabled | True |
| project_id | b15cde70d85749689e08106f973bb002 |
| provider:network_type | None |
| provider:physical_network | None |
| provider:segmentation_id | None |
| qos_policy_id | None |
| revision_number | 2 |
| router:external | Internal |
| segments | None |
| shared | False |
| status | ACTIVE |
| subnets | |
| updated_at | 2017-12-08T12:06:38Z |
+---------------------------+--------------------------------------+
Subnet
Now that you have a network, you need to create a subnet for it.
The subnet creation command also has a few options. In our example, we use:
--network: Specifies the network where the subnet will be created--subnet-range: The CIDR range for the subnet. In our example it is192.168.2.0/24
To create a subnet in your existing network, run the following command:
$ openstack subnet create BeispielSubnet --network BeispielNetzwerk --subnet-range 192.168.2.0/24
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+
| allocation_pools | 192.168.2.2-192.0.2.254 |
| cidr | 192.168.2.0/24 |
| created_at | 2017-12-08T12:09:07Z |
| description | |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 192.168.2.1 |
| host_routes | |
| id | 984b24bf-db60-46a9-83c3-d68f6f1062e4 |
| ip_version | 4 |
| ipv6_address_mode | None |
| ipv6_ra_mode | None |
| name | BeispielSubnet |
| network_id | ff6d8654-66d6-4881-9528-2686bddcb6dc |
| project_id | b15cde70d85749689e08106f973bb002 |
| revision_number | 0 |
| segment_id | None |
| service_types | |
| subnetpool_id | None |
| updated_at | 2017-12-08T12:09:07Z |
| use_default_subnet_pool | None |
+-------------------------+--------------------------------------+
Router
For your virtual network to be able to reach the internet, you need to create a router:
$ openstack router create BeispielRouter
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+
| admin_state_up | UP |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2017-12-08T12:09:49Z |
| description | |
| distributed | False |
| external_gateway_info | None |
| flavor_id | None |
| ha | False |
| id | bfb91c7f-acca-450a-aae0-c519ab563d38 |
| name | BeispielRouter |
| project_id | b15cde70d85749689e08106f973bb002 |
| revision_number | None |
| routes | |
| status | ACTIVE |
| updated_at | 2017-12-08T12:09:49Z |
+-------------------------+--------------------------------------+
To be able to access the internet, you need to define the external gateway:
openstack router set BeispielRouter --external-gateway provider
Next, add the subnet to the router:
openstack router add subnet BeispielRouter BeispielSubnet
Port
Now that you have your subnet and router, you need to create a port for the network.
You can link the port using the --network option:
$ openstack port create BeispielPort --network BeispielNetzwerk
+-----------------------+----------------------------------------------------------------------------+
| Field | Value |
+-----------------------+----------------------------------------------------------------------------+
| admin_state_up | UP |
| allowed_address_pairs | |
| binding_host_id | None |
| binding_profile | None |
| binding_vif_details | None |
| binding_vif_type | None |
| binding_vnic_type | normal |
| created_at | 2017-12-08T12:12:13Z |
| description | |
| device_id | |
| device_owner | |
| dns_assignment | None |
| dns_name | None |
| extra_dhcp_opts | |
| fixed_ips | ip_address='192.168.2.8', subnet_id='984b24bf-db60-46a9-83c3-d68f6f1062e4' |
| id | 31777c0a-a952-43ca-bb7f-11ad33926dae |
| ip_address | None |
| mac_address | fa:16:3e:09:88:c8 |
| name | BeispielPort |
| network_id | ff6d8654-66d6-4881-9528-2686bddcb6dc |
| option_name | None |
| option_value | None |
| port_security_enabled | True |
| project_id | b15cde70d85749689e08106f973bb002 |
| qos_policy_id | None |
| revision_number | 3 |
| security_group_ids | 3d3e3074-3087-4965-9a64-34a6d56193b9 |
| status | DOWN |
| subnet_id | None |
| updated_at | 2017-12-08T12:12:13Z |
+-----------------------+----------------------------------------------------------------------------+
Conclusion
After the router, subnet, and port have been created and linked together, the setup of the sample network is complete. In the next step, you will add IPv6 access.