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That looks like a pointer address? Try using the pointer value with &

I tried it and it’s the same:

"" is not a valid CIDR block

somehow it’s empty 😕

How are you populating it?

I have a struct:

type Subnets struct {
	PrivateSubnets []*ec2.Subnet (...)

and method:

func (n *Networking) createPrivateSubnets(ctx *pulumi.Context, input types.Subnets) error {
	for i, private := range input.Private {
		subnetName := n.subnetNameGen("private", i)
		subnet, err := ec2.NewSubnet(ctx, subnetName, &ec2.SubnetArgs{
			VpcId:     n.VPC.ID(),
			CidrBlock: private.ToStringPtrOutput(),
			Tags: pulumi.StringMap{
				"Name": pulumi.String(subnetName),
			},
		}, pulumi.Parent(n))
		if err != nil {
			return err
		}

		n.Subnets.PrivateSubnets = append(n.Subnets.PrivateSubnets, subnet)
	}

	return nil
}

and then I’m trying to use it like:

func (n *Networking) createPrivateRoutes(ctx *pulumi.Context) error {
	for i, subnet := range n.Subnets.PrivateSubnets {
		routeTable, err := ec2.NewRouteTable(ctx, n.genUniqName("route-public", i), &ec2.RouteTableArgs{
			VpcId: n.VPC.ID(),
			Routes: ec2.RouteTableRouteArray{
				&ec2.RouteTableRouteArgs{
					CidrBlock: &subnet.CidrBlock,
					GatewayId: n.InternetGateway.ID(),
				}, (...)

why is

PrivateSubnets

a pointer? it has been a long time since I did this, but this worked: https://github.com/jaxxstorm/jen20-pulumi-aws-vpc/blob/go/go/main.go#L128-L149

Strange, my code looks almost the same. I cannot track the issue. Anyway, thanks! I will try to work on it tomorrow. Probably something small but I cannot catch it 😕

Hi @jolly-church-88521 , have you tried create a VPC then add route to it default route table? I think you might have tried it