使用标签和策略优先级

您可以将标签添加到要进行自动扩展的Amazon EC2实例中，然后使用这些标签在自动扩展组中优先选择实例。 结合使用标签和策略优先级可以解决AWS自动扩展策略冲突的问题。

以下是一个示例，展示如何在自动扩展组中设置标签和策略优先级：

resource "aws_autoscaling_group" "example" {
  name                      = "example_group"
  availability_zones        = ["us-west-2a", "us-west-2b", "us-west-2c"]
  desired_capacity          = 3
  min_size                  = 3
  max_size                  = 3

  tag {
    key                 = "Environment"
    value               = "Production"
    propagate_at_launch = true
  }

  tag {
    key                 = "Application"
    value               = "Example"
    propagate_at_launch = true
  }

  launch_template {
    id      = "lt-xxxxxxxx"
    version = "$Latest"

    overrides = [
      {
        instance_type = "t2.micro"
      },
    ]
  }

  lifecycle {
    ignore_changes = [launch_template]
  }

  # Scale up policy with higher priority
  scaling_policy {
    name                   = "scale_up_policy"
    policy_type            = "TargetTrackingScaling"
    adjustment_type        = "ChangeInCapacity"
    estimated_instance_warmup = 300
    target_tracking_configuration {
      predefined_metric_specification {
        predefined_metric_type = "ASGAverageCPUUtilization"
      }
      target_value = 80.0
    }
    priority = 50
  }

  # Scale down policy with lower priority
  scaling_policy {
    name                   = "scale_down_policy"
    policy_type            = "TargetTrackingScaling"
    adjustment_type        = "ChangeInCapacity"
    estimated_instance_warmup = 300
    target_tracking_configuration {
      predefined_metric_specification {
        predefined_metric_type = "ASGAverageCPUUtilization"
      }
      target_value =