use shared_cluster param for update lb

go.mod

@@ -4,7 +4,7 @@ go 1.21
 
 require (
 	github.com/onsi/gomega v1.27.6
-	github.com/serverscom/serverscom-go-client v1.0.6
+	github.com/serverscom/serverscom-go-client v1.0.7
 	github.com/spf13/pflag v1.0.5
 	go.uber.org/mock v0.4.0
 	k8s.io/api v0.28.12

go.sum

@@ -273,8 +273,8 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/serverscom/serverscom-go-client v1.0.6 h1:3i3l3K+fo6r83e8I8NbzYvBia2AJ1XRVRRmyFafS5bw=
-github.com/serverscom/serverscom-go-client v1.0.6/go.mod h1:X4/JkqDMjEFAqp0hqdRTmcMXc6V2xCitj+kmNyne3/U=
+github.com/serverscom/serverscom-go-client v1.0.7 h1:3+Gld2eueCNtUOaHn9DmQ9ABowUpAkAMbZlKxeMFVOg=
+github.com/serverscom/serverscom-go-client v1.0.7/go.mod h1:X4/JkqDMjEFAqp0hqdRTmcMXc6V2xCitj+kmNyne3/U=
 github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0=
 github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/soheilhy/cmux v0.1.5 h1:jjzc5WVemNEDTLwv9tlmemhC73tI08BNOIGwBOo10Js=

serverscom/loadbalancers.go

@@ -68,6 +68,7 @@ func (l *loadBalancers) EnsureLoadBalancer(ctx context.Context, clusterName stri
 		return nil, err
 	}
 
+	// empty value for cluster id still returns nil
 	lbClusterID := l.extractLBClusterID(service)
 
 	if loadBalancer == nil {
@@ -99,6 +100,9 @@ func (l *loadBalancers) EnsureLoadBalancer(ctx context.Context, clusterName stri
 		input.UpstreamZones = upstreamZones
 		input.Name = &name
 		input.ClusterID = lbClusterID
+		if lbClusterID == nil {
+			*input.SharedCluster = true
+		}
 
 		loadBalancer, err = l.client.LoadBalancers.UpdateL4LoadBalancer(ctx, loadBalancer.ID, input)
 		if err != nil {
@@ -291,12 +295,10 @@ func (l *loadBalancers) buildResult(service *v1.Service, loadBalancer *cli.L4Loa
 	return &v1.LoadBalancerStatus{Ingress: ingresses}
 }
 
-func (l *loadBalancers) extractLBClusterID(service *v1.Service) string {
-	var clusterID string
-
-	if id, ok := service.Annotations[loadBalancerClusterAnnotation]; ok {
-		clusterID = id
+func (l *loadBalancers) extractLBClusterID(service *v1.Service) *string {
+	if id, ok := service.Annotations[loadBalancerClusterAnnotation]; ok && id != "" {
+		return &id
 	}
 
-	return clusterID
+	return nil
 }