kubernetes/kops · error

Error creating port: %v

Error message

Error creating port: %v

What it means

Port.RenderOpenstack wraps a failure from t.Cloud.CreatePort (the Neutron port-create API) with this message. The port creation options were built successfully, but Neutron rejected or failed the create call.

Source

Thrown at upup/pkg/fi/cloudup/openstacktasks/port.go:261

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

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

		opt, err := portCreateOptsFromPortTask(t, a, e, changes)
		if err != nil {
			return fmt.Errorf("Error creating port cloud opts: %v", err)
		}

		v, err := t.Cloud.CreatePort(opt)
		if err != nil {
			return fmt.Errorf("Error creating port: %v", err)
		}

		if e.Tags != nil {
			for _, tag := range e.Tags {
				err = t.Cloud.AppendTag(openstack.ResourceTypePort, v.ID, tag)
				if err != nil {
					return fmt.Errorf("Error appending tag to port: %v", err)
				}
			}
		}
		e.ID = new(v.ID)
		klog.V(2).Infof("Creating a new Openstack port, id=%s", v.ID)
		return nil
	}
	if changes != nil {
		if changes.Tags != nil {
			klog.V(2).Infof("Updating tags for Port with name: %q", fi.ValueOf(e.Name))
			for _, tag := range e.Tags {

View on GitHub (pinned to 4c8573c808)

Solutions

1. Read the wrapped Neutron error for the exact API cause
2. Check subnet IP availability and project port quotas
3. Verify the network/subnet IDs referenced by the cluster spec still exist
4. Re-run kops to retry transient Neutron failures

Example fix

null

// pre-check subnet capacity and quotas before creating ports
subnets, err := cloud.ListSubnets(subnets.ListOpts{NetworkID: networkID})
if err != nil || len(subnets) == 0 {
    return fmt.Errorf("network %s has no usable subnets", networkID)
}

v, err := t.Cloud.CreatePort(opt)
if err != nil {
    // retry on 409/5xx transient errors; abort on quota/IP-exhaustion errors
    return fmt.Errorf("Error creating port: %v", err)
}

When it happens

Trigger: After building ports.CreateOpts, the CreatePort API call returns an error: invalid subnet/network ID, fixed-IP conflict, quota exceeded (ports per project), MTU mismatch, or API/auth failure.

Common situations: IP address exhaustion in the subnet; port quota reached; network or subnet deleted externally while kops was running; Neutron policy forbids the user binding fixed IPs; invalid allowed address pairs.

Related errors

• failed to find floating ip: %v
• failed to list layer 3 floating ips for port ID %s: %v
• Failed to get port with id %s: %v
• found multiple ports with name: %s
• Error creating port cloud opts: %v

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/f8f808eef8162310. Report an issue: GitHub.