ALIYUN::ROS::WaitConditionHandle用于创建在UserData执行过程中发送消息和接收消息的实例。

语法

{
  "Type": "ALIYUN::ROS::WaitConditionHandle",
  "Properties": {
    "Count": Integer, 
    "Mode": String
  }
}

属性

属性名称 类型 必须 允许更新 描述 约束
Count Integer 否 是 准备接收的消息总数。 默认值：-1。
Mode String 否 是 如果设置为Increment，所有旧信号将被删除之前更新。如果设置为Full，则不删除任何旧信号，除非设置Count。
取值范围：
  • Increment
  • Full

默认值：Full。

返回值

Fn::GetAtt

  • CurlCli：该资源产生一个curl命令。通过该命令发送UserData执行的结果或者状态到资源编排服务系统。
  • WindowsCurlCli：为Windows提供curl CLI命令前缀，可用于发出处理完成或失败的信号。由于Windows不支持curl命令，您需要先安装curl.exe并将其添加到PATH中。您可以通过添加--data-binary "{\"status\": \" success \"}来表示成功，或者通过添加--data-binary "{\"status\": \" failure \"}来表示失败。
  • PowerShellCurlCli：为PowerShell提供curl CLI命令前缀，可用于发出信号处理完成或失败。因为这个cmdlet是在PowerShell 3.0中引入的，所以要确保PowerShell的版本满足这个约束。通过$PSVersionTable.PSVersion显示版本。您可以通过添加-Body '{"status": " success "}来表示成功，或者通过添加-Body '{"status": " failure "}来表示失败。

示例

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {
    "Mode": {
      "Type": "String",
      "Description": "If set to Increment, all old signals will be deleted before update. In this mode, WaitCondition.Count should reference an incremental value instead of a full value, such as ScalingGroupEnable.ScalingRuleArisExecuteResultNumberOfAddedInstances.\n\nIf set to Full, no old signal will be deleted unless Count is set. In this mode, WaitCondition.Count should reference a full value, such as the same value with InstanceGroup.MaxAmount. It is recommended to use this mode with Count.\n\nDefault to Full.",
      "AllowedValues": [
        "Increment",
        "Full"
      ],
      "Default": "Full"
    },
    "Count": {
      "Type": "Number",
      "Description": "There are 3 preconditions that make Count taking effect:\n1.Mode is set to Full.\n2.Count >= 0.\n3.The id of signal is not specified. If so, it will be a self-increasing integer started from 1. For example, the id of the first signal is 1, the id of the second signal is 2, and so on.\n\nIf Count takes effect, signals with id > Count will be deleted before update.\nThe default value is -1, which means no effect.\nIt is recommended to quote the same value with WaitCondition.Count.",
      "Default": -1
    }
  },
  "Resources": {
    "WaitConditionHandle": {
      "Type": "ALIYUN::ROS::WaitConditionHandle",
      "Properties": {
        "Mode": {
          "Ref": "Mode"
        },
        "Count": {
          "Ref": "Count"
        }
      }
    }
  },
  "Outputs": {
    "CurlCli": {
      "Description": "Convenience attribute, provides curl CLI command prefix, which can be used for signalling handle completion or failure.  You can signal success by adding --data-binary '{\"status\": \"SUCCESS\"}' , or signal failure by adding --data-binary '{\"status\": \"FAILURE\"}'",
      "Value": {
        "Fn::GetAtt": [
          "WaitConditionHandle",
          "CurlCli"
        ]
      }
    },
    "WindowsCurlCli": {
      "Description": "Convenience attribute, provides curl CLI command prefix for Windows, which can be used for signalling handle completion or failure. As Windows does not support curl command, you need to install curl.exe and add it to PATH first. You can signal success by adding --data-binary \"{\\\"status\\\": \\\"SUCCESS\\\"}\" , or signal failure by adding --data-binary \"{\\\"status\\\": \\\"FAILURE\\\"}\" ",
      "Value": {
        "Fn::GetAtt": [
          "WaitConditionHandle",
          "WindowsCurlCli"
        ]
      }
    },
    "PowerShellCurlCli": {
      "Description": "Convenience attribute, provides curl CLI command prefix for PowerShell, which can be used for signalling handle completion or failure. As this cmdlet was introduced in PowerShell 3.0, ensure the version of PowerShell satisfies the constraint. (Show the version via $PSVersionTable.PSVersion.) You can signal success by adding -Body '{\"status\": \"SUCCESS\"}' , or signal failure by adding -Body '{\"status\": \"FAILURE\"}' ",
      "Value": {
        "Fn::GetAtt": [
          "WaitConditionHandle",
          "PowerShellCurlCli"
        ]
      }
    }
  }
}