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Find load balancer by label first #17

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Merged
olegy89 merged 2 commits into from
Jan 23, 2026
Merged

Find load balancer by label first #17

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97b7df2
add find lb by label first
olegy89 Jan 23, 2026
25fdbba
fix tests
olegy89 Jan 23, 2026
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33 changes: 26 additions & 7 deletions serverscom/loadbalancers.go
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@ func newLoadBalancers(client *cli.Client, defaultLocationID *int64) cloudprovide
}

func (l *loadBalancers) GetLoadBalancer(ctx context.Context, clusterName string, service *v1.Service) (*v1.LoadBalancerStatus, bool, error) {
loadBalancer, err := l.findLoadBalancerByName(ctx, clusterName, service)
loadBalancer, err := l.findLoadBalancer(ctx, clusterName, service)

if err != nil && isNotFoundError(err) {
return nil, false, nil
Expand All @@ -59,7 +59,7 @@ func (l *loadBalancers) GetLoadBalancerName(ctx context.Context, clusterName str
}

func (l *loadBalancers) EnsureLoadBalancer(ctx context.Context, clusterName string, service *v1.Service, nodes []*v1.Node) (*v1.LoadBalancerStatus, error) {
loadBalancer, err := l.findLoadBalancerByName(ctx, clusterName, service)
loadBalancer, err := l.findLoadBalancer(ctx, clusterName, service)
if err != nil {
if !isNotFoundError(err) {
return nil, err
Expand Down Expand Up @@ -130,7 +130,7 @@ func (l *loadBalancers) EnsureLoadBalancer(ctx context.Context, clusterName stri
}

func (l *loadBalancers) UpdateLoadBalancer(ctx context.Context, clusterName string, service *v1.Service, nodes []*v1.Node) error {
loadBalancer, err := l.findLoadBalancerByName(ctx, clusterName, service)
loadBalancer, err := l.findLoadBalancer(ctx, clusterName, service)
if err != nil {
return err
}
Expand Down Expand Up @@ -166,7 +166,7 @@ func (l *loadBalancers) UpdateLoadBalancer(ctx context.Context, clusterName stri
}

func (l *loadBalancers) EnsureLoadBalancerDeleted(ctx context.Context, clusterName string, service *v1.Service) error {
loadBalancer, err := l.findLoadBalancerByName(ctx, clusterName, service)
loadBalancer, err := l.findLoadBalancer(ctx, clusterName, service)
if err != nil {
if isNotFoundError(err) {
return nil
Expand All @@ -178,10 +178,29 @@ func (l *loadBalancers) EnsureLoadBalancerDeleted(ctx context.Context, clusterNa
return l.client.LoadBalancers.DeleteL4LoadBalancer(ctx, loadBalancer.ID)
}

func (l *loadBalancers) findLoadBalancerByName(ctx context.Context, clusterName string, service *v1.Service) (*cli.L4LoadBalancer, error) {
name := l.GetLoadBalancerName(ctx, clusterName, service)

// findLoadBalancer tries to find load balancer by label selector first, then by name
func (l *loadBalancers) findLoadBalancer(ctx context.Context, clusterName string, service *v1.Service) (*cli.L4LoadBalancer, error) {
// first try to find by label selector
labelSelector := loadBalancerServiceUUIDLabel + "=" + string(service.UID)
loadBalancers, err := l.client.LoadBalancers.Collection().
SetPerPage(100).
SetParam(typeParamKey, "l4").
SetParam("label_selector", labelSelector).
Collect(ctx)

if err != nil {
return nil, err
}

if len(loadBalancers) == 1 {
return l.client.LoadBalancers.GetL4LoadBalancer(ctx, loadBalancers[0].ID)
} else if len(loadBalancers) > 1 {
return nil, fmt.Errorf("found more than one load balancer with the same label selector: %s", labelSelector)
}

// fallback to name-based search
name := l.GetLoadBalancerName(ctx, clusterName, service)
loadBalancers, err = l.client.LoadBalancers.Collection().
SetPerPage(100).
SetParam(typeParamKey, "l4").
SetParam(searchPatternParamKey, name).
Expand Down
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