Single-node guided

This tutorial shows how to install OpenStack (based on project Sunbeam). It will deploy an OpenStack 2023.1 (Antelope) cloud.

Requirements

You will need a single machine whose requirements are:

• physical or virtual machine running Ubuntu 22.04 LTS
• a multi-core amd64 processor (ideally with 4+ cores)
• a minimum of 16 GiB of free memory
• 50 GiB of SSD storage available on the root disk
• two network interfaces
  • primary: for access to the OpenStack control plane
  • secondary: for remote access to cloud VMs

Control plane networking

The network associated with the primary network interface requires a range of approximately ten IP addresses that will be used for API service endpoints.

For the purposes of this tutorial, the following configuration is in place:

External networking

The network associated with the secondary network interface requires a range of IP addresses that will be sufficient for allocating floating IP addresses to VMs. This will, in turn, allow them to be contacted by remote hosts.

For the purposes of this tutorial, the following configuration is in place:

Deploy the cloud

The cloud deployment process consists of several stages: installing a snap, preparing the cloud node machine, bootstrapping the cloud, and finally configuring the cloud.

Install the openstack snap

Begin by installing the openstack snap:

sudo snap install openstack --channel 2024.1/beta

Prepare the machine

Sunbeam can generate a script to ensure that the machine has all of the required dependencies installed and is configured correctly for use in OpenStack - you can review this script using:

sunbeam prepare-node-script

or the script can be directly executed in this way:

sunbeam prepare-node-script | bash -x && newgrp snap_daemon

The script will ensure some software requirements are satisfied on the host. In particular, it will:

• install openssh-server if it is not found
• configure passwordless sudo for all commands for the current user (NOPASSWD:ALL)

Bootstrap the cloud

Deploy the OpenStack cloud using the cluster bootstrap command:

sunbeam cluster bootstrap

On snap channel 2024.1/beta, you will first be prompted whether or not to enable network proxy usage. If ‘Yes’, several sub-questions will be asked.

Use proxy to access external network resources? [y/n] (y):
Enter value for http_proxy: ():
Enter value for https_proxy: ():
Enter value for no_proxy: ():

Note that proxy settings can also be supplied by using a manifest (see Deployment manifest).

When prompted, enter the CIDR and the address range for the control plane networking. Here we use the values given earlier:

Management networks shared by hosts (CIDRs, separated by comma) (10.20.20.0/24): 172.16.1.0/24
MetalLB address allocation range (supports multiple ranges, comma separated) (10.20.20.10-10.20.20.20): 172.16.1.201-172.16.1.220

Configure the cloud

Now configure the deployed cloud using the configure command:

sunbeam configure --openrc demo-openrc

The --openrc option specifies a regular user (non-admin) cloud init file (demo-openrc here).

A series of questions will now be asked. Below is a sample output of an entire interactive session. The values in square brackets, when present, provide acceptable values. A value in parentheses is the default value. Here we use the values given earlier:

Local or remote access to VMs [local/remote] (local): remote
CIDR of network to use for external networking (10.20.20.0/24): 172.16.2.0/24
IP address of default gateway for external network (10.20.20.1): 172.16.2.1
Populate OpenStack cloud with demo user, default images, flavors etc [y/n] (y):
Username to use for access to OpenStack (demo):
Password to use for access to OpenStack (mt********):
Network range to use for project network (192.168.122.0/24):
Enable ping and SSH access to instances? [y/n] (y):
Start of IP allocation range for external network (10.20.20.2): 172.16.2.2
End of IP allocation range for external network (10.20.20.254): 172.16.2.254
Network type for access to external network [flat/vlan] (flat):
Writing openrc to demo-openrc ... done
Free network interface that will be configured for external traffic [eno1/eno2] (eno1): eno2

Any remote hosts intending to connect to VMs on this node (remote access in first question) must have connectivity with the interface selected for external traffic (last question above).

Launch a VM

Verify the cloud by launching a VM called ‘test’ based on the ‘ubuntu’ image (Ubuntu 22.04 LTS). The launch command is used:

sunbeam launch ubuntu --name test

Sample output:

Launching an OpenStack instance ...
Access instance with `ssh -i /home/ubuntu/.config/openstack/sunbeam ubuntu@172.16.2.200`

Connect to the VM over SSH. Because remote VM access has been enabled, you will need the private SSH key given in the above output from the launching node. Copy it to the connecting host. Note that the VM will not be ready instantaneously; waiting time is mostly determined by the cloud’s available resources.

Related how-tos

Now that OpenStack is set up, be sure to check out the following howto guides:

• Accessing the OpenStack dashboard
• Using the OpenStack CLI