kubernetes/kops · error

Failed to retrieve subnet `%s` in loadbalancer creation: %v

Error message

Failed to retrieve subnet `%s` in loadbalancer creation: %v

What it means

Listing Neutron subnets by the configured subnet name failed during load-balancer creation. The wrapped error identifies the API failure; the subnet is needed as the LB's VIP subnet.

Source

Thrown at upup/pkg/fi/cloudup/openstacktasks/lb.go:202

		if changes.ID != nil {
			return fi.CannotChangeField("ID")
		}
		if changes.Name != nil {
			return fi.CannotChangeField("Name")
		}
	}
	return nil
}

func (_ *LB) RenderOpenstack(t *openstack.OpenstackAPITarget, a, e, changes *LB) error {
	if a == nil {
		klog.V(2).Infof("Creating LB with Name: %q", fi.ValueOf(e.Name))

		subnets, err := t.Cloud.ListSubnets(subnets.ListOpts{
			Name: fi.ValueOf(e.Subnet),
		})
		if err != nil {
			return fmt.Errorf("Failed to retrieve subnet `%s` in loadbalancer creation: %v", fi.ValueOf(e.Subnet), err)
		}
		if len(subnets) != 1 {
			return fmt.Errorf("Unexpected desired subnets for `%s`.  Expected 1, got %d", fi.ValueOf(e.Subnet), len(subnets))
		}

		lbopts := loadbalancers.CreateOpts{
			Name:        fi.ValueOf(e.Name),
			VipSubnetID: subnets[0].ID,
		}
		if e.FlavorID != nil {
			lbopts.FlavorID = fi.ValueOf(e.FlavorID)
		}
		lb, err := t.Cloud.CreateLB(lbopts)
		if err != nil {
			return fmt.Errorf("error creating LB: %v", err)
		}
		e.ID = new(lb.ID)
		e.PortID = new(lb.VipPortID)

View on GitHub (pinned to 4c8573c808)

Solutions

1. Inspect the wrapped Neutron error
2. Verify the subnet name in the cluster spec exists
3. Retry after the API failure clears

When it happens

Trigger: Thrown at upup/pkg/fi/cloudup/openstacktasks/lb.go:202 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/6a8ee1ed87ae7bba. Report an issue: GitHub.