Calico charm doesn't support advertising service's Cluster IP or External IP for the K8s services

Hi!

I've deployed Charmed Kubernetes on top of OpenStack with calico and openstack-integrator charms.

I'm aware that advertisement of the service IP and service external IP is not supported by the calico charm. So I tried to configure calico directly as described in [1]:

ubuntu@kubernetes-worker-0:~$ sudo calicoctl get bgpconfig -o yaml
apiVersion: projectcalico.org/v3
items:
- apiVersion: projectcalico.org/v3
  kind: BGPConfiguration
  metadata:
    creationTimestamp: 2021-03-14T13:27:29Z
    name: default
    resourceVersion: "749731"
    uid: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
  spec:
    asNumber: <pvt_as_number>
    logSeverityScreen: Debug
    nodeToNodeMeshEnabled: true
    serviceClusterIPs:
    - cidr: 192.168.132.128/26
    serviceExternalIPs:
    - cidr: 192.168.132.192/26
kind: BGPConfigurationList
metadata:
  resourceVersion: "991445"

With this configuration after I create a service using Kubernetes manifest I don't see the service IP advertised.

Also when modify the service to "type: LoadBalancer" I see that K8s creates OpenStack LB, but Calico does not advertise the external IP to the peers as described in [2].

$ kubectl get svc -o yaml hello
apiVersion: v1
kind: Service
...
  name: hello
  namespace: default
...
  uid: ...
spec:
  clusterIP: 192.168.132.139
  clusterIPs:
  - 192.168.132.139
  externalTrafficPolicy: Cluster
  ports:
  - nodePort: 30391
    port: 80
    protocol: TCP
    targetPort: http
  selector:
    app: nginx-svc-test
    tier: backend
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer: {}

$ openstak loadbalancer list | grep hello
... | kube_service_kubernetes-..._default_hello | ... | 192.168.9.245 | ACTIVE | amphora

Same happens also if I manually assign the external IP to the service, i.e. not changing the type to LoadBalancer, but just patching the service via kubectl.

So to summarize: the functionality described in [2] and [1] cannot be enabled in charmed Calico deployment by following the described steps.

Please fix / implement this functionality.

[1] https://docs.projectcalico.org/networking/advertise-service-ips#advertise-service-external-ip-addresses
[2] https://docs.projectcalico.org/networking/advertise-service-ips