func createInternalVirtualNetwork( client network.ManagementClient, controllerResourceGroup string, location string, tags map[string]string, ) (*network.VirtualNetwork, error) { addressPrefixes := make([]string, 256) for i := range addressPrefixes { addressPrefixes[i] = fmt.Sprintf("10.%d.0.0/16", i) } virtualNetworkParams := network.VirtualNetwork{ Location: to.StringPtr(location), Tags: toTagsPtr(tags), Properties: &network.VirtualNetworkPropertiesFormat{ AddressSpace: &network.AddressSpace{&addressPrefixes}, }, } logger.Debugf("creating virtual network %q", internalNetworkName) vnetClient := network.VirtualNetworksClient{client} vnet, err := vnetClient.CreateOrUpdate( controllerResourceGroup, internalNetworkName, virtualNetworkParams, ) if err != nil { return nil, errors.Annotatef(err, "creating virtual network %q", internalNetworkName) } return &vnet, nil }