#82 add resources for blue green deployment

deploy/code_deploy.tf

@@ -0,0 +1,50 @@
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/codedeploy_app
+resource "aws_codedeploy_app" "application_main" {
+  compute_platform = "ECS"
+  name             = var.name
+}
+
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/codedeploy_deployment_group
+resource "aws_codedeploy_deployment_group" "application_main" {
+  app_name               = aws_codedeploy_app.application_main.name
+  deployment_group_name  = "${var.name}-deploy-group"
+  deployment_config_name = "CodeDeployDefault.ECSAllAtOnce"
+  service_role_arn       = aws_iam_role.codedeploy.arn
+  blue_green_deployment_config {
+    deployment_ready_option {
+      action_on_timeout = "CONTINUE_DEPLOYMENT"
+    }
+    terminate_blue_instances_on_deployment_success {
+      action                           = "TERMINATE"
+      termination_wait_time_in_minutes = 1
+    }
+  }
+  ecs_service {
+    cluster_name = local.infra_output["aws_ecs_cluster_name"]
+    service_name = aws_ecs_service.service.name
+  }
+  deployment_style {
+    deployment_option = "WITH_TRAFFIC_CONTROL"
+    deployment_type   = "BLUE_GREEN"
+  }
+  auto_rollback_configuration {
+    enabled = true
+    events  = ["DEPLOYMENT_FAILURE"]
+  }
+  load_balancer_info {
+    target_group_pair_info {
+      prod_traffic_route {
+        listener_arns = [local.infra_output["aws_lb_listener"]]
+      }
+      target_group {
+        name = local.infra_output["aws_lb_blue_target_group"]
+      }
+      target_group {
+        name = local.infra_output["aws_lb_green_target_group"]
+      }
+    }
+  }
+  lifecycle {
+    ignore_changes = [blue_green_deployment_config]
+  }
+}

deploy/code_deploy_role.tf

@@ -1,22 +1,22 @@
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document
 data "aws_iam_policy_document" "assume_by_codedeploy" {
   statement {
     sid     = ""
     effect  = "Allow"
     actions = ["sts:AssumeRole"]
-
     principals {
       type        = "Service"
       identifiers = ["codedeploy.amazonaws.com"]
     }
   }
 }
-
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role
 resource "aws_iam_role" "codedeploy" {
   name               = "${var.name}-code-deploy-role"
   assume_role_policy = data.aws_iam_policy_document.assume_by_codedeploy.json
 }
 
-
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document
 data "aws_iam_policy_document" "codedeploy" {
   statement {
     sid    = "AllowLoadBalancingAndECSModifications"
@@ -76,6 +76,7 @@ data "aws_iam_policy_document" "codedeploy" {
     ]
   }
 }
+#https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy
 resource "aws_iam_role_policy" "codedeploy" {
   role   = aws_iam_role.codedeploy.name
   policy = data.aws_iam_policy_document.codedeploy.json

deploy/ecs_service.tf

@@ -16,4 +16,7 @@ resource "aws_ecs_service" "service" {
     subnets          = local.infra_output["subnet_ids"]
     assign_public_ip = false
   }
+  deployment_controller {
+    type = "CODE_DEPLOY"
+  }
 }