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Creating new networks

Before creating a server in Cleura Cloud, you need at least one network to make the new server a member of. Since you may have more than one network per region, let us now walk through creating a new network using the Cleura Cloud Management Panel, or using the OpenStack CLI.


Whether you choose to work from the Cleura Cloud Management Panel or with the OpenStack CLI, you need to have an account in Cleura Cloud. Additionally, to use the OpenStack CLI make sure to enable it first.

Creating a network

To create a network from the Cleura Cloud Management Panel, fire up your favorite web browser, navigate to the Cleura Cloud start page, and login into your Cleura Cloud account. On the other hand, if you prefer to work with OpenStack CLI, please do not forget to source the RC file first.

On the top right-hand side of the Cleura Cloud Management Panel, click the Create button. A new pane will slide into view from the right-hand side of the browser window, titled Create.

Create a new object

You will notice several rounded boxes prominently displayed on that pane, each for defining, configuring, and instantiating a different Cleura Cloud object. Go ahead and click the Network box. A new pane titled Create Network will slide over. At the top, type in a name and select one of the available regions for the new network.

New network name and region

Start by creating a new network, named nordostbahnhof:

openstack network create nordostbahnhof

By issuing the command above, you immediately get information regarding the new network:

| Field                     | Value                                |
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2022-10-30T14:31:49Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 201d458b-9b47-4408-9736-980bec77d405 |
| ipv4_address_scope        | None                                 |
| ipv6_address_scope        | None                                 |
| is_default                | False                                |
| is_vlan_transparent       | None                                 |
| mtu                       | 1500                                 |
| name                      | nordostbahnhof                       |
| port_security_enabled     | True                                 |
| project_id                | dfc700467396428bacba4376e72cc3e9     |
| provider:network_type     | None                                 |
| provider:physical_network | None                                 |
| provider:segmentation_id  | None                                 |
| qos_policy_id             | None                                 |
| revision_number           | 1                                    |
| router:external           | Internal                             |
| segments                  | None                                 |
| shared                    | False                                |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| updated_at                | 2022-10-30T14:31:50Z                 |

Adding a subnet and a router

Creating a new network does not necessarily mean it has all the features you most likely would expect. Unless you work from the Cleura Cloud Management Panel, where almost every component is activated for you with a few clicks here and there, when you use the OpenStack CLI there is some extra work you need to do before you get a network you would characterize as useful.

Expand the Advanced Options section below, make sure Port Security is enabled, and leave the MTU parameter blank.

MTU and port security

You probably want a full-featured network for your cloud servers, so please activate the Create a complete network containing a subnet and a router option. You will notice that a network address in CIDR notation is pre-configured for your network. You also get a couple of DNS servers, a Gateway, and a DHCP server.

Complete network

Scroll down a little bit if you have to. Assuming you want your cloud servers to reach hosts on the Internet, for the External network parameter make sure you select ext-net. Then, click the green Create button to initialize the new network. In a few seconds, the new network will be readily available.

Finish creating network

You now have to create a subnet for the new network. Let us call this subnet nordostbahnhof-subnet:

openstack subnet create nordostbahnhof-subnet \
    --network nordostbahnhof --subnet-range

Again, you get detailed information regarding the new subnet:

| Field                | Value                                |
| allocation_pools     |              |
| cidr                 |                        |
| created_at           | 2022-10-30T14:47:40Z                 |
| description          |                                      |
| dns_nameservers      |                                      |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           |                           |
| host_routes          |                                      |
| id                   | 1b0822b3-62e8-4b40-92e8-8544c72d4c15 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | nordostbahnhof-subnet                |
| network_id           | 201d458b-9b47-4408-9736-980bec77d405 |
| project_id           | dfc700467396428bacba4376e72cc3e9     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2022-10-30T14:47:40Z                 |

If you want servers connected to the nordostbahnhof network to have Internet access, you need a router in front of the network. Following our unofficial naming convention, go ahead and create a new router called nordostbahnhof-router:

openstack router create nordostbahnhof-router 

As expected, you will see lots of information regarding the new router:

| Field                   | Value                                |
| admin_state_up          | UP                                   |
| availability_zone_hints |                                      |
| availability_zones      |                                      |
| created_at              | 2022-10-30T15:36:26Z                 |
| description             |                                      |
| enable_ndp_proxy        | None                                 |
| external_gateway_info   | null                                 |
| flavor_id               | None                                 |
| ha                      | True                                 |
| id                      | 566de991-fc0e-4f85-b6c4-5c87694781f7 |
| name                    | nordostbahnhof-router                |
| project_id              | dfc700467396428bacba4376e72cc3e9     |
| revision_number         | 1                                    |
| routes                  |                                      |
| status                  | ACTIVE                               |
| tags                    |                                      |
| tenant_id               | dfc700467396428bacba4376e72cc3e9     |
| updated_at              | 2022-10-30T15:36:26Z                 |

You want the nordostbahnhof-router connected to the external network. The name of this network is ext-net:

openstack router set nordostbahnhof-router --external-gateway ext-net

Please note that if the command above is successful, you will get no output on your terminal. There is one last step to take, and that is to connect router nordostbahnhof-router to the subnet nordostbahnhof-subnet of network nordostbahnhof:

openstack router add subnet nordostbahnhof-router nordostbahnhof-subnet

Again, if the command above is successful, you will get no output.

Listing networks and getting information

At any time, you may connect to the Cleura Cloud Management Panel, list all networks you have already created, and get detailed information for any of these networks. Alternatively, you may get all that information using the OpenStack CLI.

You may see all defined networks, in all supported regions, by selecting Networking > Networks (see the left-hand side pane on the Cleura Cloud Management Panel).

All networks in all regions

For more information regarding a specific network, click the corresponding three-dot icon (right-hand side) and select View details. Then, you can glance over all the details regarding the selected network’s ports, subnets, and routers.

Network details

To list all available networks in a specific region, just type:

openstack network list

You can always ask for more specific results. For instance, to see all internal networks only, type the following:

openstack network list --internal

You can also get detailed information about a specific network:

openstack network show nordostbahnhof

At any time, type openstack network list --help or openstack network show --help to see how to get information regarding networks, and what specific pieces of information you can have.