Make proxy protocol in upcloud LB configurable (#10971)

contrib/terraform/upcloud/cluster-settings.tfvars

@@ -118,6 +118,7 @@ worker_allowed_ports = []
 
 loadbalancer_enabled        = false
 loadbalancer_plan           = "development"
+loadbalancer_proxy_protocol = false
 loadbalancers = {
   # "http" : {
   #   "port" : 80,

contrib/terraform/upcloud/main.tf

@@ -33,6 +33,7 @@ module "kubernetes" {
 
   loadbalancer_enabled                 = var.loadbalancer_enabled
   loadbalancer_plan                    = var.loadbalancer_plan
+  loadbalancer_outbound_proxy_protocol = var.loadbalancer_proxy_protocol ? "v2" : ""
   loadbalancers                        = var.loadbalancers
 
   server_groups = var.server_groups

contrib/terraform/upcloud/modules/kubernetes-cluster/main.tf

@@ -521,6 +521,9 @@ resource "upcloud_loadbalancer_backend" "lb_backend" {
 
   loadbalancer = upcloud_loadbalancer.lb[0].id
   name         = "lb-backend-${each.key}"
+  properties {
+    outbound_proxy_protocol = var.loadbalancer_outbound_proxy_protocol
+  }
 }
 
 resource "upcloud_loadbalancer_frontend" "lb_frontend" {

contrib/terraform/upcloud/modules/kubernetes-cluster/variables.tf

@@ -85,6 +85,10 @@ variable "loadbalancer_plan" {
   type = string
 }
 
+variable "loadbalancer_outbound_proxy_protocol" {
+  type = string
+}
+
 variable "loadbalancers" {
   description = "Load balancers"
 

contrib/terraform/upcloud/variables.tf

@@ -121,6 +121,11 @@ variable "loadbalancer_plan" {
   default     = "development"
 }
 
+variable "loadbalancer_proxy_protocol" {
+  type    = bool
+  default = false
+}
+
 variable "loadbalancers" {
   description = "Load balancers"