create migrations structure

infrastructure/terraform/aws/main.tf

@@ -36,13 +36,21 @@ module "core_dependency_services" {
 }
 
 module "service_core" {
-  source = "./modules/ecs-service"
+  source = "./modules/container-generic"
 
   service_name = "core"
   cluster_info = module.cluster.cluster_info
 
   repository_url = module.cluster.ecr_repository_urls.core
 
+  set_lb_target = true
+
+  init_containers = [{
+    name = "migrations"
+    image = "${module.cluster.ecr_repository_urls.root}:latest"
+    command = ["npx", "prisma", "migrate", "deploy"]
+  }]
+
   configuration = {
     container_port = 3000
     environment = [
@@ -67,7 +75,7 @@ module "service_core" {
 }
 
 module "service_flock" {
-  source = "./modules/ecs-service"
+  source = "./modules/container-generic"
 
   service_name = "jobs"
   cluster_info = module.cluster.cluster_info

infrastructure/terraform/aws/modules/ecs-service/main.tf → infrastructure/terraform/aws/modules/container-generic/main.tf

@@ -15,7 +15,7 @@ module "ecs_service" {
   # task_role_arn            = aws_iam_role.ecs_task_role.arn
 
   # TEMPLATE Container definition(s).
-  container_definitions = {
+  container_definitions = merge({
 
     "${var.service_name}" = {
       essential = true
@@ -30,6 +30,11 @@ module "ecs_service" {
       secrets = var.configuration.secrets
 
       readonly_root_filesystem = false
+      dependencies = [for ic in var.init_containers: {
+        containerName = ic.name
+        condition     = "SUCCESS"
+      }]
+
 
       log_configuration = {
         logDriver = "awslogs",
@@ -41,15 +46,36 @@ module "ecs_service" {
       }
       # memory_reservation = 100
     }
-  }
+  },
+  {
+    for ic in var.init_containers: ic.name => {
+      essential = false
+      image     = ic.image
+      command = ic.command
+
+      environment = var.configuration.environment
+      secrets = var.configuration.secrets
+
+      readonly_root_filesystem = false
 
-  load_balancer = {
+      log_configuration = {
+        logDriver = "awslogs",
+        options = {
+          awslogs-group = var.cluster_info.cloudwatch_log_group_name,
+          awslogs-region = var.cluster_info.region,
+          awslogs-stream-prefix = "ecs"
+        }
+      }
+    }
+  })
+
+  load_balancer = var.set_lb_target ? {
     service = {
       target_group_arn = var.cluster_info.lb_target_group_arn
       container_name   = var.service_name
       container_port   = var.configuration.container_port
     }
-  }
+  } : {}
 
   subnet_ids = var.cluster_info.private_subnet_ids
   security_group_ids = var.cluster_info.container_security_group_ids

infrastructure/terraform/aws/modules/ecs-service/variables.tf → infrastructure/terraform/aws/modules/container-generic/variables.tf

@@ -37,6 +37,22 @@ variable "resources" {
   }
 }
 
+variable "set_lb_target" {
+  description = "whether this service is addressible from the main Load Balancer"
+  type = bool
+  default = false
+}
+
+variable "init_containers" {
+  description = "list of init container specs to run before starting"
+  type = list(object({
+    name = string
+    image = string
+    command = list(string)
+  }))
+  default = []
+}
+
 variable "configuration" {
   description = "Container configuration options"