问题

I am trying to set the autoscaling policy for redis via terraform. 我正在尝试通过Terraform为Redis设置自动缩放策略。

I am setting the autoscaling policy as follows: 我正在如下设置自动缩放策略：

# Attach the autoscaling policy to the Redis replication group
resource "aws_appautoscaling_target" "redis_autoscaling_target" {
  max_capacity       = 10
  min_capacity       = 1
  resource_id        = "elasticache:${module.elasticache_redis.elasticache_replication_group_id}"
  scalable_dimension = "elasticache:replication-group:NodeGroups"
  service_namespace  = "elasticache"
}

The module to setup redis in cluster mode is as follows: 用于设置集群模式下Redis的模块如下：

module "elasticache_redis" {
  source = "umotif-public/elasticache-redis/aws"
  version = "~> 3.0.0"
    
  name_prefix           = "${var.redis_cache_name}-${var.environment}"
  num_cache_clusters    = var.redis_number_cache_clusters
  node_type             = var.redis_node_type
    
  cluster_mode_enabled    = true
  replicas_per_node_group = 1
  num_node_groups         = 2
    
  //rest of config is not important
}

I keep getting the following error: 我一直收到以下错误消息：

creating Application AutoScaling Target (elasticache:test-redis): ValidationException: Unsupported service namespace, resource type or scalable dimension

# Attach the autoscaling policy to the Redis replication group
resource "aws_appautoscaling_target" "redis_autoscaling_target" {
  max_capacity       = 10
  min_capacity       = 1
  resource_id        = "elasticache:${module.elasticache_redis.elasticache_replication_group_id}"
  scalable_dimension = "elasticache:replication-group:NodeGroups"
  service_namespace  = "elasticache"
}

module "elasticache_redis" {
  source = "umotif-public/elasticache-redis/aws"
  version = "~> 3.0.0"
    
  name_prefix           = "${var.redis_cache_name}-${var.environment}"
  num_cache_clusters    = var.redis_number_cache_clusters
  node_type             = var.redis_node_type
    
  cluster_mode_enabled    = true
  replicas_per_node_group = 1
  num_node_groups         = 2
    
  //rest of config is not important
}

creating Application AutoScaling Target (elasticache:test-redis): ValidationException: Unsupported service namespace, resource type or scalable dimension

答案1

得分: 1

资源ID的格式不正确。从下面的示例中，格式应该是replication-group/mycluster，其中你需要将mycluster替换为集群ID，而在我的情况下是${module.elasticache_redis.elasticache_replication_group_id}。

aws application-autoscaling register-scalable-target \
   --service-namespace elasticache \
   --scalable-dimension elasticache:replication-group:NodeGroups \
   --resource-id replication-group/mycluster \
   --min-capacity 1 \
   --max-capacity 5

参考链接：https://docs.aws.amazon.com/autoscaling/application/userguide/services-that-can-integrate-elasticache.html

aws application-autoscaling register-scalable-target \
   --service-namespace elasticache \
   --scalable-dimension elasticache:replication-group:NodeGroups \
   --resource-id replication-group/mycluster \
   --min-capacity 1 \
   --max-capacity 5