Add slow_start parameter to target group (#104)

Co-authored-by: nitrocode <[email protected]> Co-authored-by: cloudpossebot <[email protected]> Co-authored-by: Matt Gowie <[email protected]>
cloudposse · May 3, 2022 · ef40bb7 · ef40bb7
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diff --git a/README.md b/README.md
@@ -285,6 +285,7 @@ Available targets:
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_security_group_enabled"></a> [security\_group\_enabled](#input\_security\_group\_enabled) | Enables the security group | `bool` | `true` | no |
 | <a name="input_security_group_ids"></a> [security\_group\_ids](#input\_security\_group\_ids) | A list of additional security group IDs to allow access to ALB | `list(string)` | `[]` | no |
+| <a name="input_slow_start"></a> [slow\_start](#input\_slow\_start) | The amount of time (30-900 seconds) until a healthy target receives its full share of requests from the load balancer. 0 to disable. | `number` | `null` | no |
 | <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | <a name="input_standard_transition_days"></a> [standard\_transition\_days](#input\_standard\_transition\_days) | Number of days to persist logs in standard storage tier before moving to the infrequent access tier | `number` | `30` | no |
 | <a name="input_stickiness"></a> [stickiness](#input\_stickiness) | Target group sticky configuration | <pre>object({<br>    cookie_duration = number<br>    enabled         = bool<br>  })</pre> | `null` | no |

diff --git a/docs/terraform.md b/docs/terraform.md
@@ -101,6 +101,7 @@
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_security_group_enabled"></a> [security\_group\_enabled](#input\_security\_group\_enabled) | Enables the security group | `bool` | `true` | no |
 | <a name="input_security_group_ids"></a> [security\_group\_ids](#input\_security\_group\_ids) | A list of additional security group IDs to allow access to ALB | `list(string)` | `[]` | no |
+| <a name="input_slow_start"></a> [slow\_start](#input\_slow\_start) | The amount of time (30-900 seconds) until a healthy target receives its full share of requests from the load balancer. 0 to disable. | `number` | `null` | no |
 | <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | <a name="input_standard_transition_days"></a> [standard\_transition\_days](#input\_standard\_transition\_days) | Number of days to persist logs in standard storage tier before moving to the infrequent access tier | `number` | `30` | no |
 | <a name="input_stickiness"></a> [stickiness](#input\_stickiness) | Target group sticky configuration | <pre>object({<br>    cookie_duration = number<br>    enabled         = bool<br>  })</pre> | `null` | no |

diff --git a/main.tf b/main.tf
@@ -105,6 +105,7 @@ resource "aws_lb_target_group" "default" {
   vpc_id               = var.vpc_id
   target_type          = var.target_group_target_type
   deregistration_delay = var.deregistration_delay
+  slow_start           = var.slow_start
 
   health_check {
     protocol            = var.target_group_protocol

diff --git a/variables.tf b/variables.tf
@@ -140,6 +140,12 @@ variable "deregistration_delay" {
   description = "The amount of time to wait in seconds before changing the state of a deregistering target to unused"
 }
 
+variable "slow_start" {
+  type        = number
+  default     = null
+  description = "The amount of time (30-900 seconds) until a healthy target receives its full share of requests from the load balancer. 0 to disable."
+}
+
 variable "drop_invalid_header_fields" {
   type        = bool
   default     = false