No hint on the number of IP addresses required for MetalLB

[Nobuto Murata]

The prompt of setting the IP range doesn't hint anything about the number of IP addresses required for the Sunbeam deployment.

$ sunbeam cluster bootstrap --role control --role compute --role storage
WARNING: Minimum system requirements (4 core CPU, 16 GB RAM) not met.
Management networks shared by hosts (CIDRs, separated by comma) (192.168.123.0/24):
MetalLB address allocation range (supports multiple ranges, comma separated) (10.20.21.10-10.20.21.20):

I didn't take a deeper look yet, but it seems at least two are required. Otherwise it simply fails.

Name: ovn-relay
Namespace: openstack
Labels: app.juju.is/created-by=ovn-relay
                          app.kubernetes.io/managed-by=juju
                          app.kubernetes.io/name=ovn-relay
Annotations: controller.juju.is/id: fa151232-96dc-4330-8917-edddfa4c45d6
                          juju.is/version: 3.2.0
                          model.juju.is/id: 9b04a76e-d8b8-43b0-8bd7-9b453d044523
Selector: app.kubernetes.io/name=ovn-relay
Type: LoadBalancer
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.152.183.134
IPs: 10.152.183.134
LoadBalancer Ingress: 192.168.123.81
Port: southbound 6642/TCP
TargetPort: 6642/TCP
NodePort: southbound 30907/TCP
Endpoints: 10.1.32.221:6642
Session Affinity: None
External Traffic Policy: Cluster
Events:
  Type Reason Age From Message
  ---- ------ ---- ---- -------
  Normal nodeAssigned 65s (x27 over 124m) metallb-speaker announcing from node "sunbeam-1" with protocol "layer2"

Name: traefik
Namespace: openstack
Labels: app.juju.is/created-by=traefik
                          app.kubernetes.io/managed-by=juju
                          app.kubernetes.io/name=traefik
Annotations: controller.juju.is/id: fa151232-96dc-4330-8917-edddfa4c45d6
                          juju.is/version: 3.2.0
                          model.juju.is/id: 9b04a76e-d8b8-43b0-8bd7-9b453d044523
Selector: app.kubernetes.io/name=traefik
Type: LoadBalancer
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.152.183.35
IPs: 10.152.183.35
Port: traefik 80/TCP
TargetPort: 80/TCP
NodePort: traefik 30149/TCP
Endpoints: 10.1.32.220:80
Port: traefik-tls 443/TCP
TargetPort: 443/TCP
NodePort: traefik-tls 32023/TCP
Endpoints: 10.1.32.220:443
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>

[Nobuto Murata (nobuto)]

Looks like the number is 4 as of today.

$ kubectl describe all -n openstack | grep -B1 'Type: *LoadBalancer'
Selector: app.kubernetes.io/name=ovn-relay
Type: LoadBalancer
--
Selector: app.kubernetes.io/name=traefik
Type: LoadBalancer
--
Selector: app.kubernetes.io/name=traefik-public
Type: LoadBalancer
--
Selector: app.kubernetes.io/name=rabbitmq
Type: LoadBalancer

[Nobuto Murata (nobuto)]

Additionally, what's MetalLB and why it's needed is not well covered in the tutorial. e.g.
https://microstack.run/docs/single-node-guided

It would be good to explain it in both CLI and the tutorials or naming it differently in CLI would be good.

> MetalLB address allocation range

Since the initial users do not care much what's technology is used for exposing OpenStack services in the beginning.

[Nobuto Murata (nobuto)]

Related: https://discourse.ubuntu.com/t/interactive-configuration-prompts/36230/2

[James Page (james-page)]

Lets update the documentation and the prompt to detail the range required and remove MetalLB from the wording - this is for access to control plane services and that level of detail should be sufficient (and insulates the prompt from future changes to the loadbalancing choice in k8s).