feat: allows setting of SkipMatching for instance refreshing

Author: radimsuckr

functions/lambda.py

@@ -26,6 +26,7 @@ class InstanceRefreshInProgress(LambdaError):
 LOGGING_LEVEL = environ.get('LOGGING_LEVEL', logging.INFO)
 REFRESH_INSTANCE_WARMUP = int(environ['REFRESH_INSTANCE_WARMUP'])
 REFRESH_MIN_HEALTHY_PERCENTAGE = int(environ['REFRESH_MIN_HEALTHY_PERCENTAGE'])
+REFRESH_SKIP_MATCHING = bool(environ['REFRESH_SKIP_MATCHING'])
 SENTRY_DSN = environ.get('SENTRY_DSN')
 SSM_PARAMETER_NAME = environ['SSM_PARAMETER_NAME']
 UPDATE_MIXED_INSTANCES_POLICY_OVERRIDEN_LAUNCH_TEMPLATES = bool(environ['UPDATE_MIXED_OVERRIDE_LAUNCH_TEMPLATES'])
@@ -163,6 +164,7 @@ def start_instance_refresh():
             Preferences={
                 'InstanceWarmup': REFRESH_INSTANCE_WARMUP,
                 'MinHealthyPercentage': REFRESH_MIN_HEALTHY_PERCENTAGE,
+                'SkipMatching': REFRESH_SKIP_MATCHING,
             },
         )
     except autoscaling.exceptions.InstanceRefreshInProgressFault as ex:

lambda.tf

@@ -26,6 +26,7 @@ resource "aws_lambda_function" "refresh" {
       DESCRIBE_INSTANCE_REFRESHES_MAX_RECORDS                  = var.describe_instance_refreshes_max_records
       REFRESH_INSTANCE_WARMUP                                  = var.instance_refresh_instance_warmup
       REFRESH_MIN_HEALTHY_PERCENTAGE                           = var.instance_refresh_min_healthy_percentage
+      REFRESH_SKIP_MATCHING                                    = var.instance_refresh_skip_matching ? "True" : "False"
       SENTRY_DSN                                               = var.sentry_dsn
       SENTRY_ENVIRONMENT                                       = var.sentry_environment
       SSM_PARAMETER_NAME                                       = var.ami_ssm_parameter

variables.tf

@@ -39,6 +39,12 @@ variable "instance_refresh_min_healthy_percentage" {
   type        = number
 }
 
+variable "instance_refresh_skip_matching" {
+  description = "Skip matching instances for instance refresh"
+  default     = false
+  type        = bool
+}
+
 variable "launch_template_version_description" {
   description = "Description of the new launch template version in Python's f-string format"
   default     = "Automated AMI refresh to \"{image_id}\""