An already assigned IP address to service is removed if the IP address pool is edited to tie to a namespace.

4.13

Once in 2 times

 oc version
Client Version: 4.12.0-0.nightly-2022-07-25-055755
Kustomize Version: v4.5.4
Server Version: 4.13.0-0.nightly-2023-02-15-202607
Kubernetes Version: v1.26.0+c729678

oc get csv -n metallb-system
NAME                                    DISPLAY            VERSION               REPLACES                                PHASE
metallb-operator.v4.13.0-202302080355   MetalLB Operator   4.13.0-202302080355   metallb-operator.v4.13.0-202302061816   Succeeded


1. Created two ip addresspools with YAML below:-
----
apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: ip-addresspool-l3a
  labels:
    zone: east
  namespace: metallb-system
spec:
  addresses:
    - 10.10.10.1-10.10.10.10
  autoAssign: true
  avoidBuggyIPs: true
  serviceAllocation:
    priority: 50
    serviceSelectors:
      - matchLabels:
          environ: test
----
apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: ip-addresspool-l3b
  labels:
    zone: east
  namespace: metallb-system
spec:
  addresses:
    - 10.10.10.11-10.10.10.20
  autoAssign: true
  avoidBuggyIPs: true
  serviceAllocation:
    priority: 40
    serviceSelectors:
      - matchLabels:
          environ: dev

oc get ipaddresspool -n metallb-system
NAME                 AUTO ASSIGN   AVOID BUGGY IPS   ADDRESSES
ip-addresspool-l3a   true          true              ["10.10.10.1-10.10.10.10"]
ip-addresspool-l3b   true          true              ["10.10.10.11-10.10.10.20"]



2. Create a project test and created two services with different labels to see both assigned IP addresses from appropriate pools.
 oc get svc
NAME           TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
hello-idle     LoadBalancer   172.30.240.226   10.10.10.1    8000:31465/TCP   31s
hello-idle-1   LoadBalancer   172.30.168.160   10.10.10.11   8000:32299/TCP   4s


3. Create another project test1 and edit address pool ip-addresspool-l3a to add namespaces: test and ip-addresspool-l3b namespaces: dev.
4. Create a service with label environ=dev in namespace test1 .
oc get svc
NAME         TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-idle   LoadBalancer   172.30.16.176   10.10.10.11   8000:31172/TCP   36m

The newly created service in ns test1 get assigned IP address that was assigned to service 1 in ns test  oc get svc -n test
NAME           TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
hello-idle     LoadBalancer   172.30.240.226   10.10.10.1    8000:31465/TCP   53m
hello-idle-1   LoadBalancer   172.30.168.160   <pending>     8000:32299/TCP   53m
  

The IP address from a service should not get unassigned.

oc describe svc hello-idle-1 -n test
Name:                     hello-idle-1
Namespace:                test
Labels:                   environ=dev
Annotations:              <none>
Selector:                 name=hello-idle
Type:                     LoadBalancer
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       172.30.168.160
IPs:                      172.30.168.160
Port:                     <unset>  8000/TCP
TargetPort:               8080/TCP
NodePort:                 <unset>  32299/TCP
Endpoints:                10.128.2.39:8080,10.131.0.43:8080
Session Affinity:         None
External Traffic Policy:  Cluster
Events:
  Type     Reason            Age                From                Message
  ----     ------            ----               ----                -------
  Normal   IPAllocated       51m                metallb-controller  Assigned IP ["10.10.10.11"]
  Normal   nodeAssigned      40m (x3 over 51m)  metallb-speaker     announcing from node "worker-00.asood-2161.qe.devcluster.openshift.com" with protocol "bgp"
  Normal   nodeAssigned      40m (x3 over 51m)  metallb-speaker     announcing from node "worker-01.asood-2161.qe.devcluster.openshift.com" with protocol "bgp"
  Warning  AllocationFailed  40m (x3 over 40m)  metallb-controller  Failed to allocate IP for "test/hello-idle-1": no available IPs