Problem with Release 2.18.0 all clusters would be redeployed

[menzbua]

Hello,

I'm experiencing a problem with the update to version 2.18.0. After upgrading, all my clusters and load balancers would be redeployed by Terraform. From my perspective, the reason for the redeployment is the change of the subnet handling of the networks.

terraform-hcloud-kube-hetzner/locals.tf

Lines 304 to 310 in a6faafd

	# The first two subnets are respectively the default subnet 10.0.0.0/16 use for potientially anything and 10.1.0.0/16 used for control plane nodes.
	# the rest of the subnets are for agent nodes in each nodepools.
	network_ipv4_subnets = [for index in range(4) : cidrsubnet(var.network_ipv4_cidr, 2, index)]
	network_ipv4_subnets_agent_pools = [for index in range(256) : cidrsubnet(local.network_ipv4_subnets[0], 8, index)]
	network_ipv4_subnets_control_plane_pools = [for index in range(256) : cidrsubnet(local.network_ipv4_subnets[1], 8, index)]
	network_ipv4_subnet_peripherals = local.network_ipv4_subnets[2]

The behavior before 2.18.0 was a little bit different:

terraform-hcloud-kube-hetzner/locals.tf

Lines 245 to 247 in eb20e0a

	# The first two subnets are respectively the default subnet 10.0.0.0/16 use for potientially anything and 10.1.0.0/16 used for control plane nodes.
	# the rest of the subnets are for agent nodes in each nodepools.
	network_ipv4_subnets = [for index in range(256) : cidrsubnet(var.network_ipv4_cidr, 8, index)]

This ends up in a new IP address for the services and forces replacement. Here's an example:

  # module.hcloud_load_balancer_network.cluster[0] must be replaced
-/+ resource "hcloud_load_balancer_network" "cluster" {
      ~ id                      = "4192289-11294314" -> (known after apply)
      ~ ip                      = "10.255.0.1" -> "10.0.0.254"
      ~ subnet_id               = "11294314-10.0.0.0/16" # forces replacement -> (known after apply) # forces replacement
        # (2 unchanged attributes hidden)
    }

The only network-specific thing I have configured is the use_control_plane_lb = true. All other network values are using the defaults.

Has anyone else encountered this issue? What would be the recommended approach to resolve this problem?

Thank you very much.

Regards,
Manuel

[pschiffe]

Take a look at v2.18.1, should fix your problem.