- Advertisement -
VPS House Servers
VPS House Servers
VPS House Servers

This tutorial will guide you on how you can configure OpenStack networking service in order to allow access from external networks to OpenStack instances.

Step 1: Modify Network Interface Configuration Files

1. Before starting to create OpenStack networks from dashboard, first we need to create an OVS bridge and modify our physical network interface to bind as a port to OVS bridge.

Thus, login to your server terminal, navigate to network interfaces directory scripts and use the physical interface as an excerpt to setup OVS bridge interface by issuing the following commands:

Setup-OVS-Bridge-Interface-in-OpenStack

2. Next, edit and modify the bridge interface (br-ex) using a text editor as illustrated below:

- Advertisement -
VPS House Cloud Servers
VPS House Cloud Servers
VPS House Cloud Servers

Interface br-ex excerpt:

Configure-Bridge-Network-Interface-for-OpenStack

3. Do the same with the physical interface (eno16777736), but make sure it looks like this:

Interface eno16777736 excerpt:

Configure-Physical-Network-Interface-for-OpenStack

Important: While editing interfaces cards make sure you replace the physical interface name, IPs and DNS servers accordingly.

4. Finally, after you’ve modified edited both network interfaces, restart network daemon to reflect changes and verify the new configurations using ip command.

Verify-Network-Configuration

Step 2: Create a New OpenStack Project (Tenant)

5. On this step we need to use Openstack dashboard in order to further configure our cloud environment.

Login to Openstack web panel (dashboard) with admin credentials and go to Identity -> Projects -> Create Project and create a new project as illustrated below.

Create-New-OpenStack-Project

Add-OpenStack-New-Project-Details

6. Next, navigate to Identity -> Users -> Create User and create a new user by filling all the fields with the required information.

Assure that this new user has the Role assigned as a _member_ of the newly created tenant (project).

Create-New-User-in-OpenStack-Project

Step 3: Configure OpenStack Network

7. After the user has been created, log out admin from dashboard and log in with the new user in order to create two networks (internal network and external).

Navigate to Project -> Networks -> Create Network and setup the internal network as follows:

Use the below screenshots as a guide. Also, replace the Network Name, Subnet Name and IP addresses with your own custom settings.

Create-Network-for-OpenStack

Login-to-OpenStack-Dashboard-as-User

Enable-DHCP-for-OpenStack

Create-Network-Subnet-for-OpenStack

8. Next, use the same steps as above to create the external network. Make sure the IP address space for external network is in the same network range as your uplink bridge interface IP address range in order to work properly without extra routes.

Therefore, if the br-ex interface has 192.168.1.1 as a default gateway for 192.168.1.0/24 network, the same network and gateway IPs should be configured for external network too.

Create-External-Network-for-OpenStack

Enable-DHCP-for-External-Network

Create-Subnet-for-External-Network

Again, replace the Network Name, Subnet Name and IP addresses according to your own custom configurations.

9. On the next step we need to log in OpenStack dashboard as admin and mark the external network as External in order to be able to communicate with the bridge interface.

Thus, login with admin credentials and move to Admin -> System-> Networks, click on the external network, check the External Network box and hit on Save Changes to apply the configuration.

Make-Network-as-External-Network

Select-External-network

External-Network-Settings-Updated

Login-as-Admin-in-OpenStack-Dashboard

When done, logout from admin user and log in with the custom user again to proceed to the next step.

10. Finally, we need to create a router for our two networks in order to move packets back and forth. Go to Project -> Network -> Routers and hit on Create Router button. Add the following settings for the router.

Create-Network-Router-in-OpenStack

11. Once the Router has been created you should be able to see it in the dashboard. Click on the router name, go to Interfaces tab and hit on Add Interface button and a new prompt should appear.

Select the internal subnet, leave the IP Address field blank and hit on Submit button to apply changes and after a few seconds your interface should become Active.

Add-New-Network-Interface-in-OpenStack

Configure-Network-Interface

12. In order to verify OpenStack network settings, go to Project -> Network -> Network Topology and a network map will be presented as illustrated on the below screenshot.

Verify-OpenStack-Network-Topology

That’s all! Your OpenStack network is now functional and ready for virtual machines traffic. On the next topic we’ll discuss how to create and launch an OpenStack image instance.

- Advertisement -

There are no comments yet

  • Hello, guest