adds blue-green codedeploy option (#15)

* adds blue-green codedeploy option * add example
skyscrapers · Apr 12, 2019 · d3846c3 · d3846c3
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diff --git a/README.md b/README.md
@@ -75,6 +75,39 @@ Create an deployment group for a codedeploy app
     trigger_target_arn = "arn:aws:sns:eu-west-1:123456780:CodeDeploy"
   }
 ```
+## deployment-group-blue-green
+Creates a deployment group for a CodeDeploy app. This works in a blue/green way
+
+### Available variables
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| action\_on\_timeout | When to reroute traffic from an original environment to a replacement environment in a blue/green deployment | string | `"CONTINUE_DEPLOYMENT"` | no |
+| app\_name | Name of the app | string | n/a | yes |
+| autoscaling\_groups | Autoscaling groups you want to attach to the deployment group | list | n/a | yes |
+| environment | Environment where your codedeploy deployment group is used for | string | n/a | yes |
+| rollback\_enabled | Whether to enable auto rollback | string | `"false"` | no |
+| rollback\_events | The event types that trigger a rollback | list | `<list>` | no |
+| service\_role\_arn | IAM role that is used by the deployment group | string | n/a | yes |
+| terminate\_blue\_instances\_on\_deployment\_success | The action to take on instances in the original environment after a successful blue/green deployment | string | `"KEEP_ALIVE"` | no |
+| trigger\_events | events that can trigger the notifications | list | `<list>` | no |
+| trigger\_target\_arn | ARN of the target group | string | n/a | yes |
+
+### Outputs
+
+/
+
+### Example
+```
+  module "deployment_group-ec2tag" {
+    environment        = "environment"
+    app_name           = "codedeploy_app_app_name"
+    service_role_arn   = "codedeploy_role_arn"
+    autoscaling_groups = ["${var.blue_desired_capacity > 0 ? blue_asg_id : green_asg_id}"]
+    trigger_target_arn = "sns_lambda_topic"
+    rollback_enabled   = true
+  }
+```
 
 ## deployment-group-ec2tag
 Create an deployment group for a codedeploy app. This module will filter for tags

diff --git a/deployment-group-blue-green/main.tf b/deployment-group-blue-green/main.tf
@@ -0,0 +1,33 @@
+resource "aws_codedeploy_deployment_group" "deployment_group" {
+  app_name               = "${var.app_name}"
+  deployment_group_name  = "${var.app_name}-${var.environment}"
+  deployment_config_name = "CodeDeployDefault.AllAtOnce"
+  service_role_arn       = "${var.service_role_arn}"
+  autoscaling_groups     = ["${var.autoscaling_groups}"]
+
+  auto_rollback_configuration {
+    enabled = "${var.rollback_enabled}"
+    events  = "${var.rollback_events}"
+  }
+
+  blue_green_deployment_config {
+    deployment_ready_option {
+      action_on_timeout = "${var.action_on_timeout}"
+    }
+
+    terminate_blue_instances_on_deployment_success {
+      action = "${var.terminate_blue_instances_on_deployment_success}"
+    }
+  }
+
+  deployment_style {
+    deployment_option = "WITH_TRAFFIC_CONTROL"
+    deployment_type   = "BLUE_GREEN"
+  }
+
+  trigger_configuration {
+    trigger_events     = "${var.trigger_events}"
+    trigger_name       = "${var.app_name}-${var.environment}"
+    trigger_target_arn = "${var.trigger_target_arn}"
+  }
+}
diff --git a/deployment-group-blue-green/variables.tf b/deployment-group-blue-green/variables.tf
@@ -0,0 +1,47 @@
+variable "environment" {
+  description = "Environment where your codedeploy deployment group is used for"
+}
+
+variable "app_name" {
+  description = "Name of the app"
+}
+
+variable "service_role_arn" {
+  description = "IAM role that is used by the deployment group"
+}
+
+variable "autoscaling_groups" {
+  type        = "list"
+  description = "Autoscaling groups you want to attach to the deployment group"
+}
+
+variable "rollback_enabled" {
+  description = "Whether to enable auto rollback"
+  default     = false
+}
+
+variable "rollback_events" {
+  description = "The event types that trigger a rollback"
+  type        = "list"
+  default     = ["DEPLOYMENT_FAILURE"]
+}
+
+variable "trigger_events" {
+  description = "events that can trigger the notifications"
+  type        = "list"
+  default     = ["DeploymentStop", "DeploymentRollback", "DeploymentSuccess", "DeploymentFailure", "DeploymentStart"]
+}
+
+variable "trigger_target_arn" {
+  description = "ARN of the target group"
+}
+
+variable "action_on_timeout" {
+  description = "When to reroute traffic from an original environment to a replacement environment in a blue/green deployment"
+  default = "CONTINUE_DEPLOYMENT"
+}
+
+variable "terminate_blue_instances_on_deployment_success" {
+  description = " The action to take on instances in the original environment after a successful blue/green deployment"
+  default = "KEEP_ALIVE"
+}