Upcloud: Added ipsec properties for UpCloud gateway VPN

contrib/terraform/upcloud/README.md

@@ -150,7 +150,20 @@ terraform destroy --var-file cluster-settings.tfvars \
     * `remote_routes`: Map of local routes for the connection
       * `type`: Type of route
       * `static_network`: Destination prefix of the route; needs to be a valid IPv4 prefix
-    * `remote_address`: The remote address for the tunnel
+    * `tunnels`: The tunnels to create for this connection
+      * `remote_address`: The remote address for the tunnel
+      * `ipsec_properties`: Set properties of IPSec, if not set, defaults will be used
+        * `child_rekey_time`: IKE child SA rekey time in seconds
+        * `dpd_delay`: Delay before sending Dead Peer Detection packets if no traffic is detected, in seconds
+        * `dpd_timeout`: Timeout period for DPD reply before considering the peer to be dead, in seconds
+        * `ike_lifetime`: Maximum IKE SA lifetime in seconds()
+        * `rekey_time`: IKE SA rekey time in seconds
+        * `phase1_algorithms`: List of Phase 1: Proposal algorithms
+        * `phase1_dh_group_numbers`: List of Phase 1 Diffie-Hellman group numbers
+        * `phase1_integrity_algorithms`: List of Phase 1 integrity algorithms
+        * `phase2_algorithms`: List of Phase 2: Security Association algorithms
+        * `phase2_dh_group_numbers`: List of Phase 2 Diffie-Hellman group numbers
+        * `phase2_integrity_algorithms`: List of Phase 2 integrity algorithms
 * `gateway_vpn_psks`: Separate variable for providing psks for connection tunnels. Environment variable can be exported in the following format `export TF_VAR_gateway_vpn_psks='{"${gateway-name}-${connecton-name}-tunnel":{psk:"..."}}'`
 * `static_routes`: Static routes to apply to the router, requires `router_enable` is set to true
 * `network_peerings`: Other UpCloud private networks to peer with, requires `router_enable` is set to true

contrib/terraform/upcloud/cluster-settings.tfvars

@@ -175,7 +175,11 @@ gateways = {
   #             static_network = "4.3.2.1/24"
   #           }
   #         }
-  #         remote_address = "1.2.3.4"
+  #         tunnels = {
+  #           "tunnel1" = {
+  #             remote_address = "1.2.3.4"
+  #           }
+  #         }
   #       }
   #     }
   #   }

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

@@ -35,14 +35,18 @@ locals {
 
   gateway_connection_tunnels = flatten([
     for gateway_name, gateway in var.gateways : [
-      for connection_name, connection in gateway.connections : {
+      for connection_name, connection in gateway.connections : [
+        for tunnel_name, tunnel in connection.tunnels : {
           "gateway_id" = upcloud_gateway.gateway[gateway_name].id
           "gateway_name" = gateway_name
           "connection_id" = upcloud_gateway_connection.gateway_connection["${gateway_name}-${connection_name}"].id
           "connection_name" = connection_name
+          "tunnel_name" = tunnel_name
           "local_address_name" = tolist(upcloud_gateway.gateway[gateway_name].address).0.name
-          "remote_address" = connection.remote_address
+          "remote_address" = tunnel.remote_address
-      }
+          "ipsec_properties" = tunnel.ipsec_properties
+        }
+      ]
     ]
   ])
 
@@ -684,7 +688,7 @@ resource "upcloud_gateway_connection" "gateway_connection" {
 
 resource "upcloud_gateway_connection_tunnel" "gateway_connection_tunnel" {
   for_each = {
-    for gct in local.gateway_connection_tunnels : "${gct.gateway_name}-${gct.connection_name}-tunnel" => gct
+    for gct in local.gateway_connection_tunnels : "${gct.gateway_name}-${gct.connection_name}-${gct.tunnel_name}-tunnel" => gct
   }
 
   connection_id = each.value.connection_id
@@ -695,6 +699,24 @@ resource "upcloud_gateway_connection_tunnel" "gateway_connection_tunnel" {
   ipsec_auth_psk {
     psk = var.gateway_vpn_psks[each.key].psk
   }
+
+  dynamic "ipsec_properties" {
+    for_each = each.value.ipsec_properties != null ? { "ip": each.value.ipsec_properties } : {}
+
+    content {
+        child_rekey_time = ipsec_properties.value["child_rekey_time"]
+        dpd_delay = ipsec_properties.value["dpd_delay"]
+        dpd_timeout = ipsec_properties.value["dpd_timeout"]
+        ike_lifetime = ipsec_properties.value["ike_lifetime"]
+        rekey_time = ipsec_properties.value["rekey_time"]
+        phase1_algorithms = ipsec_properties.value["phase1_algorithms"]
+        phase1_dh_group_numbers = ipsec_properties.value["phase1_dh_group_numbers"]
+        phase1_integrity_algorithms = ipsec_properties.value["phase1_integrity_algorithms"]
+        phase2_algorithms = ipsec_properties.value["phase2_algorithms"]
+        phase2_dh_group_numbers = ipsec_properties.value["phase2_dh_group_numbers"]
+        phase2_integrity_algorithms = ipsec_properties.value["phase2_integrity_algorithms"]
+    }
+  }
 }
 
 resource "upcloud_network_peering" "peering" {

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

@@ -139,7 +139,22 @@ variable "gateways" {
         type = string
         static_network = string
       })))
-      remote_address = string
+      tunnels = optional(map(object({
+        remote_address = string
+        ipsec_properties = optional(object({
+          child_rekey_time = number
+          dpd_delay = number
+          dpd_timeout = number
+          ike_lifetime = number
+          rekey_time = number
+          phase1_algorithms = set(string)
+          phase1_dh_group_numbers = set(string)
+          phase1_integrity_algorithms = set(string)
+          phase2_algorithms = set(string)
+          phase2_dh_group_numbers = set(string)
+          phase2_integrity_algorithms = set(string)
+        }))
+      })))
     })))
   }))
 }

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

@@ -3,7 +3,7 @@ terraform {
   required_providers {
     upcloud = {
       source  = "UpCloudLtd/upcloud"
-      version = "~>5.8.0"
+      version = "~>5.9.0"
     }
   }
   required_version = ">= 0.13"

contrib/terraform/upcloud/variables.tf

@@ -181,7 +181,22 @@ variable "gateways" {
         type           = string
         static_network = string
       })), {})
-      remote_address = string
+      tunnels = optional(map(object({
+        remote_address = string
+        ipsec_properties = optional(object({
+          child_rekey_time            = number
+          dpd_delay                   = number
+          dpd_timeout                 = number
+          ike_lifetime                = number
+          rekey_time                  = number
+          phase1_algorithms           = set(string)
+          phase1_dh_group_numbers     = set(string)
+          phase1_integrity_algorithms = set(string)
+          phase2_algorithms           = set(string)
+          phase2_dh_group_numbers     = set(string)
+          phase2_integrity_algorithms = set(string)
+        }))
+      })), {})
     })), {})
   }))
   default = {}

contrib/terraform/upcloud/versions.tf

@@ -3,7 +3,7 @@ terraform {
   required_providers {
     upcloud = {
       source  = "UpCloudLtd/upcloud"
-      version = "~>5.8.0"
+      version = "~>5.9.0"
     }
   }
   required_version = ">= 0.13"