kubernetes/kops · error

waiting for subnet create/update completion: %w

Error message

waiting for subnet create/update completion: %w

What it means

PollUntilDone failed while waiting for the subnet CreateOrUpdate LRO; ARM accepted the request but provisioning ended in failure (often address-range conflicts with peers or existing resources).

Source

Thrown at upup/pkg/fi/cloudup/azure/subnet.go:47

	CreateOrUpdate(ctx context.Context, resourceGroupName, virtualNetworkName, subnetName string, parameters network.Subnet) (*network.Subnet, error)
	List(ctx context.Context, resourceGroupName, virtualNetworkName string) ([]*network.Subnet, error)
	Delete(ctx context.Context, resourceGroupName, vnetName, subnetName string) error
}

type subnetsClientImpl struct {
	c *network.SubnetsClient
}

var _ SubnetsClient = (*subnetsClientImpl)(nil)

func (c *subnetsClientImpl) CreateOrUpdate(ctx context.Context, resourceGroupName, virtualNetworkName, subnetName string, parameters network.Subnet) (*network.Subnet, error) {
	future, err := c.c.BeginCreateOrUpdate(ctx, resourceGroupName, virtualNetworkName, subnetName, parameters, nil)
	if err != nil {
		return nil, fmt.Errorf("creating/updating subnet: %w", err)
	}
	resp, err := future.PollUntilDone(ctx, nil)
	if err != nil {
		return nil, fmt.Errorf("waiting for subnet create/update completion: %w", err)
	}
	return &resp.Subnet, err
}

func (c *subnetsClientImpl) List(ctx context.Context, resourceGroupName, virtualNetworkName string) ([]*network.Subnet, error) {
	var l []*network.Subnet
	pager := c.c.NewListPager(resourceGroupName, virtualNetworkName, nil)
	for pager.More() {
		resp, err := pager.NextPage(ctx)
		if err != nil {
			return nil, fmt.Errorf("listing subnets: %w", err)
		}
		l = append(l, resp.Value...)
	}
	return l, nil
}

func (c *subnetsClientImpl) Delete(ctx context.Context, resourceGroupName, vnetName, subnetName string) error {

View on GitHub (pinned to 4c8573c808)

Solutions

1. Inspect the wrapped error for the provisioning failure reason
2. Resolve address prefix conflicts and retry

When it happens

Trigger: Thrown at upup/pkg/fi/cloudup/azure/subnet.go:47 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/4b97e1d548e3f544. Report an issue: GitHub.