kubernetes/kops · error

could not find IP for server %s

Error message

could not find IP for server %s

What it means

Sentinel error returned by GetServerIP when the IPAM ListIPs call succeeds but returns zero IPs for the server. Unlike the wrap errors, this is a domain condition: Scaleway knows the server but has no IP registered for it in IPAM. It means the instance cannot be resolved to an address for deregistration or cloud-group membership.

Source

Thrown at upup/pkg/fi/cloudup/scaleway/cloud.go:516

func (s *scwCloudImplementation) GetServerIP(serverID string, zone scw.Zone) (string, error) {
	region, err := zone.Region()
	if err != nil {
		return "", fmt.Errorf("converting zone %s to region: %w", zone, err)
	}

	ips, err := s.ipamAPI.ListIPs(&ipam.ListIPsRequest{
		Region:     region,
		IsIPv6:     new(false),
		ResourceID: &serverID,
		Zonal:      new(zone.String()),
	}, scw.WithAllPages())
	if err != nil {
		return "", fmt.Errorf("listing IPs for server %s: %w", serverID, err)
	}

	if len(ips.IPs) < 1 {
		return "", fmt.Errorf("could not find IP for server %s", serverID)
	}
	if len(ips.IPs) > 1 {
		klog.V(10).Infof("Found more than 1 IP for server %s, using %s", serverID, ips.IPs[0].Address.IP.String())
	}

	return ips.IPs[0].Address.IP.String(), nil
}

func (s *scwCloudImplementation) DeleteDNSRecord(record *domain.Record, clusterName string) error {
	domainName := strings.SplitN(clusterName, ".", 2)[1]
	recordDeleteRequest := &domain.UpdateDNSZoneRecordsRequest{
		DNSZone: domainName,
		Changes: []*domain.RecordChange{
			{
				Delete: &domain.RecordChangeDelete{
					ID: scw.StringPtr(record.ID),
				},
			},

View on GitHub (pinned to 4c8573c808)

Solutions

1. Verify the server is running and has an IP in the Scaleway console or via `scw instance server get <id>`.
2. Retry shortly after instance creation — IPs can lag server availability.
3. Check whether the cluster is IPv6-only; if so the IsIPv6=false filter must be relaxed.
4. Confirm serverID and zone belong to the same project as the credentials.
5. If deregistering a just-deleted server, treat this as benign and skip.

Example fix

// before
ip, err := cloud.GetServerIP(serverID, zone)
if err != nil {
  return fmt.Errorf("deregistering instance: %w", err)
}
// after
ip, err := cloud.GetServerIP(serverID, zone)
if err != nil {
  if strings.Contains(err.Error(), "could not find IP for server") {
    klog.V(4).Infof("server %s has no IP (likely already deleted), skipping", serverID)
    return nil
  }
  return fmt.Errorf("deregistering instance: %w", err)
}

// check server state before resolving IP
srv, err := instance.NewAPI(client).GetServer(&instance.GetServerRequest{ServerID: serverID, Zone: zone})
if err != nil || srv.Server.State != instance.ServerStateRunning {
  // skip IP resolution; server missing or not ready
}

ip, err := cloud.GetServerIP(serverID, zone)
if err != nil && strings.Contains(err.Error(), "could not find IP for server") {
  // treat as already-deleted / not-ready and skip or retry later
}

When it happens

Trigger: Server has no private IP registered in IPAM (server still booting, just created, or terminated); querying a zone where the server has no IP; IsIPv6=false filter excludes servers with only IPv6.

Common situations: DeregisterInstance racing instance termination; newly-joined instance not yet assigned an IP; IPv6-only configuration; server ID from a different project/zone than queried.

Related errors

• listing IPs for server %s: %w
• failed to get server %s: %w
• failed to get IP for server %q: %w
• no IP found for server %q: %w
• error finding instances: %w

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/8ef3bc956dea18ea. Report an issue: GitHub.