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Just add the tags to the subnet args object. The tags object can be generated at run time, knowing whether the cluster exists and what the tag value should be.

You can create the eks clusters with a predetermined name so you can just create the subnets initially with the correct tag names

Yes, the predetermined name is the route I took. I don't quite follow how I could generate the tags object at runtime using an object / output that hasn't been created yet? But the predetermined name is working for now, thanks!

👍 You wouldn't create it in advance. The tags would be applied after the fact.. on subsequent `up`s

Ahhhh I see. Like a "cluster get" or something beforehand that doesn't error if it doesn't exist to get cluster names and create tags from them

Yep. So you'd created a tags with nothing, initially; next run, the subnets would be created so the tags would have the required value.

That's super clever! Thank you!

Yea that can be annoying. automation-api helps, and so does policy as code.

Good to know!! I'll have to take a look at those!

@billions-yak-67755 you don’t need to run up twice, just create the subnet with the tags

subnetTags := pulumi.All(clusterName, subnetName).ApplyStringMap(func(args []interface{}) map[string]string {
			name := args[0].(string)
			subnet := args[1].(string)
			return map[string]string{
				"Name":                            subnet,
				"<http://kubernetes.io/role/internal-elb|kubernetes.io/role/internal-elb>": "1",
				"<http://kubernetes.io/role/elb|kubernetes.io/role/elb>":          "1", // not sure if we'll need it but let's enable for now.
				"<http://kubernetes.io/cluster/|kubernetes.io/cluster/>" + name:   "shared",
			}
		})

		sub, err2 := pulumiec2.NewSubnet(ctx, fmt.Sprintf("eks-nodegroup-subnet-%d", i+1), &pulumiec2.SubnetArgs{
			AvailabilityZone:    pulumi.String(aws.StringValue(z.ZoneName)),
			CidrBlock:           pulumi.String(fmt.Sprintf("10.0.%d.0/18", (i+1)*64)),
			VpcId:               vpc.ID(),
			MapPublicIpOnLaunch: pulumi.BoolPtr(true),
			Tags:                subnetTags,
		}, pulumi.Provider(p))

Thanks! Yes, that is what I have currently too - just trying to understand the different ways to solve the problem in case the other path is useful to help solve other problems down the road!