kubernetes/kops · error

failed to list flavors: %v

Error message

failed to list flavors: %v

What it means

getFlavor wraps errors from flavors.ListDetail(...).AllPages — the Nova flavor-listing API call — with this message. It is called by GetFlavor when kops needs to resolve an instance type (flavor) by name.

Source

Thrown at upup/pkg/fi/cloudup/openstack/instance.go:380

	if err != nil {
		return instances, err
	} else if done {
		return instances, nil
	} else {
		return instances, wait.ErrWaitTimeout
	}
}

func (c *openstackCloud) GetFlavor(name string) (*flavors.Flavor, error) {
	return getFlavor(c, name)
}

func getFlavor(c OpenstackCloud, name string) (*flavors.Flavor, error) {
	opts := flavors.ListOpts{}
	pager := flavors.ListDetail(c.ComputeClient(), opts)
	page, err := pager.AllPages(context.TODO())
	if err != nil {
		return nil, fmt.Errorf("failed to list flavors: %v", err)
	}

	fs, err := flavors.ExtractFlavors(page)
	if err != nil {
		return nil, fmt.Errorf("failed to extract flavors: %v", err)
	}
	for _, f := range fs {
		if f.Name == name {
			return &f, nil
		}
	}

	return nil, fmt.Errorf("could not find flavor with name %v", name)
}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Verify credentials and endpoint: `openstack flavor list` with the same credentials/clouds.yaml
2. Fix authentication (refresh token / correct project) if a 401 is wrapped
3. If 403, ask the cloud admin to grant the project permission to list flavors, or resolve the flavor ID manually
4. Retry if it is a transient 5xx; readBackoff already retries internally

// confirm credentials and flavor visibility before resolving
flavors, err := osCLI.ComputeClient().FlavorList() // or `openstack flavor list`
if err != nil { return err } // auth/endpoint problem found early

f, err := GetFlavor(cloud, name)
if err != nil && strings.Contains(err.Error(), "failed to list flavors") {
    // transient — retry with backoff
    time.Sleep(5 * time.Second)
    f, err = GetFlavor(cloud, name)
}

When it happens

Trigger: pager.AllPages fails during flavor listing: compute endpoint unreachable, token expired/invalid, or Nova flavor-list API returning an error (403 if policy forbids flavor listing for the project).

Common situations: Expired OpenStack credentials; the project's policy disallows listing flavors (common in hardened deployments); compute service endpoint misconfigured in the catalog.

Related errors

• error listing servers %v: %v
• Could not list flavors: %v
• error building nova client: %v
• error describing Network: %v
• no decernable storage availability zone could be mapped to c

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/2b38f30c574dc32e. Report an issue: GitHub.