kubernetes/kops · error

found virtual network without address space

Error message

found virtual network without address space

What it means

The Azure virtualnetwork task's Find validates the discovered VNet shape before reuse: ID, Properties, and AddressSpace must all be present. This guard fires when an existing virtual network lacks an address space — a malformed/externally-modified VNet — so the task cannot compute address prefixes and refuses to adopt it (failed provisioning state is warned-and-ignored one branch earlier).

Source

Thrown at upup/pkg/fi/cloudup/azuretasks/virtualnetwork.go:82

			break
		}
	}
	if found == nil {
		return nil, nil
	}

	if found.ID == nil {
		return nil, fmt.Errorf("found virtual network without ID")
	}
	if found.Properties == nil {
		return nil, fmt.Errorf("found virtual network without properties")
	}
	if found.Properties.ProvisioningState != nil && *found.Properties.ProvisioningState == network.ProvisioningStateFailed {
		klog.Warningf("found virtual network %q in failed provisioning state", *n.Name)
		return nil, nil
	}
	if found.Properties.AddressSpace == nil {
		return nil, fmt.Errorf("found virtual network without address space")
	}

	addrPrefixes := found.Properties.AddressSpace.AddressPrefixes
	if len(addrPrefixes) != 1 {
		return nil, fmt.Errorf("expecting exactly 1 address prefix for %q, found %d: %+v", *n.Name, len(addrPrefixes), addrPrefixes)
	}
	return &VirtualNetwork{
		Name:      n.Name,
		Lifecycle: n.Lifecycle,
		Shared:    n.Shared,
		ResourceGroup: &ResourceGroup{
			Name: n.ResourceGroup.Name,
		},
		CIDR: addrPrefixes[0],
		Tags: found.Tags,
	}, nil
}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Check the VNet's address space in the Azure portal
2. Add an address range to the VNet if it genuinely has none
3. Retry the find operation

When it happens

Trigger: Thrown at upup/pkg/fi/cloudup/azuretasks/virtualnetwork.go:82 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/62cce68d29d29f2f. Report an issue: GitHub.