Fetch Load Balancer type from API and warn customers about unset annotation

[lukasmetzner]

TL;DR

load_balancer_type is a required property in the POST /v1/load_balancers endpoint. We have a hard coded default to lb11. This will lead to issues if the type is ever deprecated and eventually removed.

hcloud-cloud-controller-manager/internal/hcops/load_balancer.go

Lines 121 to 127 in cab143f

	opts := hcloud.LoadBalancerCreateOpts{
	Name: lbName,
	LoadBalancerType: &hcloud.LoadBalancerType{Name: "lb11"},
	Labels: map[string]string{
	LabelServiceUID: string(svc.ObjectMeta.UID),
	},
	}

Expected behavior

Requiring the user to set the load-balancer.hetzner.cloud/type annotation would be a breaking change we could perform in a v2.

Right now, we can fetch the default from the API and warn users with a log message and a Kubernetes event to set the load-balancer.hetzner.cloud/type annotation.

[jooola]

We can also log a message and k8s event if the load balancer type being used is deprecated (using the recently added deprecation object).