feat(modules/asg): protect_from_scale_in variable

Add `health_check_type` variable in root module for asg.

Author: saumitra-dev

README.md

@@ -35,6 +35,7 @@ No resources.
 |------|-------------|------|---------|:--------:|
 | <a name="input_asg_create_launch_template"></a> [asg\_create\_launch\_template](#input\_asg\_create\_launch\_template) | Either to create a Launch Template to associate with the Autoscaling group | `bool` | `true` | no |
 | <a name="input_asg_desired_capacity"></a> [asg\_desired\_capacity](#input\_asg\_desired\_capacity) | The number of Amazon EC2 instances that should be running in the group. | `number` | n/a | yes |
+| <a name="input_asg_health_check_type"></a> [asg\_health\_check\_type](#input\_asg\_health\_check\_type) | (Optional) "EC2" or "ELB". Controls how health checking is done. | `string` | `null` | no |
 | <a name="input_asg_iam_instance_profile_name"></a> [asg\_iam\_instance\_profile\_name](#input\_asg\_iam\_instance\_profile\_name) | (Optional, Forces new resource) Name of the instance profile. | `string` | `null` | no |
 | <a name="input_asg_iam_instance_profile_tags"></a> [asg\_iam\_instance\_profile\_tags](#input\_asg\_iam\_instance\_profile\_tags) | (Optional) Map of resource tags for the IAM Instance Profile. | `map(string)` | `{}` | no |
 | <a name="input_asg_iam_role_name"></a> [asg\_iam\_role\_name](#input\_asg\_iam\_role\_name) | (Optional, Forces new resource) Friendly name of the role. | `string` | `null` | no |
@@ -47,6 +48,7 @@ No resources.
 | <a name="input_asg_max_size"></a> [asg\_max\_size](#input\_asg\_max\_size) | Maximum size of the Auto Scaling Group | `number` | n/a | yes |
 | <a name="input_asg_min_size"></a> [asg\_min\_size](#input\_asg\_min\_size) | Minimum size of the Auto Scaling Group | `number` | n/a | yes |
 | <a name="input_asg_name"></a> [asg\_name](#input\_asg\_name) | (Optional) Name of the Auto Scaling Group. | `string` | n/a | yes |
+| <a name="input_asg_protect_from_scale_in"></a> [asg\_protect\_from\_scale\_in](#input\_asg\_protect\_from\_scale\_in) | (Optional) Whether newly launched instances are automatically protected from termination by Amazon EC2 Auto Scaling when scaling in. | `bool` | `null` | no |
 | <a name="input_asg_tags"></a> [asg\_tags](#input\_asg\_tags) | Resources Tags for Autoscaling group | `map(string)` | `{}` | no |
 | <a name="input_asg_vpc_zone_identifier"></a> [asg\_vpc\_zone\_identifier](#input\_asg\_vpc\_zone\_identifier) | (Optional) List of subnet IDs to launch resources in. | `list(string)` | n/a | yes |
 | <a name="input_cluster_name"></a> [cluster\_name](#input\_cluster\_name) | (Required) Name of the cluster | `string` | n/a | yes |

main.tf

@@ -20,13 +20,15 @@ module "asg" {
 
   cluster_name = module.cluster.name
 
-  name                = var.asg_name
-  vpc_zone_identifier = var.asg_vpc_zone_identifier
-  desired_capacity    = var.asg_desired_capacity
-  min_size            = var.asg_min_size
-  max_size            = var.asg_max_size
-  instances_tags      = var.asg_instances_tags
-  tags                = var.asg_tags
+  name                  = var.asg_name
+  vpc_zone_identifier   = var.asg_vpc_zone_identifier
+  desired_capacity      = var.asg_desired_capacity
+  min_size              = var.asg_min_size
+  max_size              = var.asg_max_size
+  protect_from_scale_in = var.asg_protect_from_scale_in
+  health_check_type     = var.asg_health_check_type
+  instances_tags        = var.asg_instances_tags
+  tags                  = var.asg_tags
 
   # Launch Template
   create_launch_template  = var.asg_create_launch_template

modules/asg/README.md

@@ -49,6 +49,7 @@ No modules.
 | <a name="input_max_size"></a> [max\_size](#input\_max\_size) | Maximum size of the Auto Scaling Group | `number` | n/a | yes |
 | <a name="input_min_size"></a> [min\_size](#input\_min\_size) | Minimum size of the Auto Scaling Group | `number` | n/a | yes |
 | <a name="input_name"></a> [name](#input\_name) | (Optional) Name of the Auto Scaling Group. | `string` | `null` | no |
+| <a name="input_protect_from_scale_in"></a> [protect\_from\_scale\_in](#input\_protect\_from\_scale\_in) | (Optional) Whether newly launched instances are automatically protected from termination by Amazon EC2 Auto Scaling when scaling in. | `bool` | `false` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | Resources Tags for Autoscaling group | `map(string)` | `{}` | no |
 | <a name="input_vpc_zone_identifier"></a> [vpc\_zone\_identifier](#input\_vpc\_zone\_identifier) | (Optional) List of subnet IDs to launch resources in. | `list(string)` | `[]` | no |
 

modules/asg/main.tf

@@ -6,7 +6,7 @@ resource "aws_autoscaling_group" "this" {
   min_size         = var.min_size
   max_size         = var.max_size
 
-  protect_from_scale_in = false
+  protect_from_scale_in = var.protect_from_scale_in
   health_check_type     = var.health_check_type
 
   launch_template {

modules/asg/variables.tf

@@ -30,6 +30,12 @@ variable "max_size" {
   type        = number
 }
 
+variable "protect_from_scale_in" {
+  description = " (Optional) Whether newly launched instances are automatically protected from termination by Amazon EC2 Auto Scaling when scaling in."
+  type        = bool
+  default     = false
+}
+
 variable "health_check_type" {
   description = "(Optional) \"EC2\" or \"ELB\". Controls how health checking is done."
   type        = string

tests/asg_unit_tests.tftest.hcl

@@ -16,12 +16,13 @@ run "asg_attributes_match" {
   variables {
     cluster_name = "example-cluster-name"
 
-    name                = "example-asg-name"
-    vpc_zone_identifier = ["subnet-12345678901234", "subnet-12345678901235"]
-    desired_capacity    = 7
-    min_size            = 1
-    max_size            = 10
-    health_check_type   = "ELB"
+    name                  = "example-asg-name"
+    vpc_zone_identifier   = ["subnet-12345678901234", "subnet-12345678901235"]
+    desired_capacity      = 7
+    min_size              = 1
+    max_size              = 10
+    protect_from_scale_in = true
+    health_check_type     = "ELB"
 
     create_launch_template  = false
     launch_template_id      = "lt-068f72b729example"
@@ -65,7 +66,7 @@ run "asg_attributes_match" {
   }
 
   assert {
-    condition     = aws_autoscaling_group.this.protect_from_scale_in == false
+    condition     = aws_autoscaling_group.this.protect_from_scale_in == var.protect_from_scale_in
     error_message = "Protect from scale in mismatch"
   }
 

variables.tf

@@ -73,6 +73,18 @@ variable "asg_max_size" {
   }
 }
 
+variable "asg_protect_from_scale_in" {
+  description = " (Optional) Whether newly launched instances are automatically protected from termination by Amazon EC2 Auto Scaling when scaling in."
+  type        = bool
+  default     = null
+}
+
+variable "asg_health_check_type" {
+  description = "(Optional) \"EC2\" or \"ELB\". Controls how health checking is done."
+  type        = string
+  default     = null
+}
+
 variable "asg_instances_tags" {
   description = "Resources Tags to propagate to the Instances"
   type        = map(string)