Add public IPv4 address of Traefik to output

[dhoppe]

This output might be required by other Terraform modules to manage the DNS records.

[mysticaltech]

Tried to merge this but it failed and had to revert it. Also, the type of LB is configured here. So not always going to be lb11.

I understand what you are trying to achieve, maybe we can find a better way.

[dhoppe]

This was just the name of the data source. The public IPv4 address will be fetched, based on the name traefik.

[mysticaltech]

Ok, I understand, will just change lb11 to lb and push it back then!

[mysticaltech]

It did not work because the lb is automatically provisioned by the CCM, not through terraform. So there is no way I know of acquiring its IP unless we ask Kubernetes somehow.

When deploying I get the following error:

Error: no Load Balancer found with name traefik
 
   with data.hcloud_load_balancer.lb,
   on data.tf line 17, in data "hcloud_load_balancer" "lb":
   17: data "hcloud_load_balancer" "lb" {

[mysticaltech]

@dhoppe If your concern is to have the lb IP to later configure DNS, this is easily solved by external-dns that can be installed in kube.

[mysticaltech]

You seem pretty advanced :) But just in case, gave an example of using external-dns at the end of issue #18

[dhoppe]

Hm. To be honest, the loadbalancer already existed when I tested this. Unfortunately my DNS provider is not supported by external-dns, yet.
kubernetes-sigs/external-dns#1980

[mysticaltech]

In that case, maybe there is a way to ask Kubernetes and grab the value, store it, and display that. Maybe with https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs