feat(ecs): add ability to add additional vars to control plane (#115)

Signed-off-by: Orla Dunlop <orla.dunlop@engineering.digital.dwp.gov.uk>

main.tf

@@ -171,6 +171,8 @@ module "kong_ecs" {
 
   nginx_custom_config = file(coalesce(var.nginx_custom_config_path, local.nginx_default_custom_config_path))
 
+  additional_vars = var.additional_vars
+
   ssl_cert     = var.ssl_cert
   ssl_key      = var.ssl_key
   lua_ssl_cert = var.lua_ssl_cert

modules/ecs/main.tf

@@ -42,6 +42,7 @@ resource "aws_ecs_task_definition" "kong" {
       db_password_arn             = var.db_password_arn
       pg_max_concurrent_queries   = var.pg_max_concurrent_queries
       pg_keepalive_timeout        = var.pg_keepalive_timeout
+      additional_vars             = var.additional_vars
       kong_admin_gui_session_conf = var.kong_admin_gui_session_conf
       log_group                   = var.log_group
       admin_api_port              = var.kong_ports.admin_api

modules/ecs/variables.tf

@@ -384,3 +384,8 @@ variable "vitals_tsdb_address" {
   description = "Time series database address for Vitals e.g. my-prometheus.net:9090"
   type        = string
 }
+
+variable "additional_vars" {
+  description = "Map of additional environment variables to set in the Control Plane"
+  type        = map(string)
+}

templates/ecs/kong_control_plane.tpl

@@ -193,6 +193,14 @@
       "name": "KONG_VITALS_TSDB_ADDRESS",
       "value": "${vitals_tsdb_address}"
     }
+    %{ if additional_vars != null }
+    %{ for name, value in additional_vars ~}
+    ,{
+      "name": "${name}",
+      "value": "${value}"
+    }
+    %{ endfor ~}
+    %{ endif }
   ],
   "secrets": [
     {

variables.tf

@@ -890,3 +890,9 @@ variable "kong_plugins" {
   type        = list(string)
   default     = []
 }
+
+variable "additional_vars" {
+  description = "(Optional) Map of additional environment variables to set in the Control Plane"
+  type        = map(string)
+  default     = null
+}