kubernetes/kops · error

could not create startup script for instance group %s: %v

Error message

could not create startup script for instance group %s: %v

What it means

Wrapped failure generating the nodeup bootstrap script (startup script) for an OpenStack instance group. The script builder (configuration/rendering of nodeup) errored; this message only identifies which instance group failed — the root cause is in the %v detail.

Source

Thrown at pkg/model/openstackmodel/servergroup.go:129

		return err
	}
	igMeta[openstack.TagKopsNetwork] = netName
	igMeta[openstack.TagKopsInstanceGroup] = ig.Name
	igMeta[openstack.TagKopsRole] = string(ig.Spec.Role)
	igMeta[openstack.INSTANCE_GROUP_GENERATION] = fmt.Sprintf("%d", ig.GetGeneration())
	igMeta[openstack.CLUSTER_GENERATION] = fmt.Sprintf("%d", b.Cluster.GetGeneration())

	if e, ok := ig.ObjectMeta.Annotations[openstack.OS_ANNOTATION+openstack.BOOT_FROM_VOLUME]; ok {
		igMeta[openstack.BOOT_FROM_VOLUME] = e
	}

	if v, ok := ig.ObjectMeta.Annotations[openstack.OS_ANNOTATION+openstack.BOOT_VOLUME_SIZE]; ok {
		igMeta[openstack.BOOT_VOLUME_SIZE] = v
	}

	startupScript, err := b.BootstrapScriptBuilder.ResourceNodeUp(c, ig)
	if err != nil {
		return fmt.Errorf("could not create startup script for instance group %s: %v", ig.Name, err)
	}

	var securityGroups []*openstacktasks.SecurityGroup
	securityGroupName := b.SecurityGroupName(ig.Spec.Role)
	securityGroups = append(securityGroups, b.LinkToSecurityGroup(securityGroupName))

	if b.Cluster.Spec.CloudProvider.Openstack.Loadbalancer == nil && ig.Spec.Role.HasControlPlane() {
		securityGroups = append(securityGroups, b.LinkToSecurityGroup(b.APIResourceName()))
	}

	r := strings.NewReplacer("_", "-", ".", "-")
	groupName := r.Replace(strings.ToLower(ig.Name))
	// In the future, OpenStack will use Machine API to manage groups,
	// for now create d.InstanceGroups.Spec.MinSize amount of servers
	for i := int32(0); i < *ig.Spec.MinSize; i++ {
		// FIXME: Must ensure 63 or less characters
		// replace all dots and _ with -, this is needed to get external cloudprovider working
		iName := strings.ReplaceAll(strings.ToLower(fmt.Sprintf("%s-%d.%s", ig.Name, i+1, b.ClusterName())), "_", "-")

View on GitHub (pinned to 4c8573c808)

Solutions

1. Inspect the wrapped error for the underlying script-generation failure
2. Verify the cluster spec's kubelet/nodeup config fields render correctly
3. Fix the reported field and re-run `kops update cluster`

When it happens

Trigger: Thrown at pkg/model/openstackmodel/servergroup.go:129 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/e0232dc100bf10d2. Report an issue: GitHub.