在云形成模板中使用 AWSUtility::CloudFormation::CommandRunner 时出错 "Index: 0, Size: 0"

Question

我们正在尝试运行 AWS 中的云形成模板中的几个 bash 命令。

我们关注了 AWS 的以下博客运行 CommandRunner utilty in cloud formation template。 https://aws.amazon.com/blogs/mt/running-bash-commands-in-aws-cloudformation-templates/

Resources:
    CommandRunner:
        Type: AWSUtility::CloudFormation::CommandRunner
        Properties: 
            Command: 'echo HelloWorld > /command-output.txt'

Outputs:
  Op1:
    Description: Test output
    Value:
      Fn::GetAtt: CommandRunner.Output

在云形成模板中运行ning 命令实用程序时遇到以下错误。

Resource handler returned message: "Index: 0, Size: 0" (RequestToken: c99903a7-****-0c58-010c-4fa03699fcfd, HandlerErrorCode: InternalFailure)

堆栈 ID/堆栈 ARN：arn:aws:cloudformation:eu-west-2:*****:stack/comandrunner-test-iops/ **

错误消息的描述不够明确，无法确定根本原因。

Answer 1

联系 AWS 支持团队时，他们给出了以下回复。

The Index: 0, Size: 0 error usually happens because you may not have a default VPC in the eu-west-2 region (P.S.: I am not able to verify this since I do not have access to your account).

In general, CommandRunner uses the default VPC to run the command, but when it doesn’t exist this error is thrown. You can still run the CommandRunner without a default VPC, by specifying the SubnetId property.

I also found an active issue pulled in on the github repository to improve the error handling for this error when it occurs on CloudFormation.

在他们回应后，我们在模板中添加了子网 ID 和安全组 ID。

提供私有子网 ID。

Parameters:
  ReqSubnetId:
    Type: String
    Description: Please enter Subnet id so that command runner can execute
    Default: subnet-0sampleid28474
    
  ReqSecurityGroupId:
    Type: String
    Description: Please enter security group id so that command runner can execute
    Default: sg-03samplesecuritygroupid


Resources:
    CommandRunner:
        Type: AWSUtility::CloudFormation::CommandRunner
        Properties: 
            Command: 'echo HelloWorld > /command-output.txt'
            SubnetId: !Ref ReqSubnetId
            SecurityGroupId: !Ref ReqSecurityGroupId
            

Outputs:
  Op1:
    Description: Test output
    Value:
      Fn::GetAtt: CommandRunner.Output

Type: AWSUtility::CloudFormation::CommandRunner 支持的选项是

Type: AWSUtility::CloudFormation::CommandRunner
Properties:
    Command: String
    Role: String
    LogGroup: String
    SubnetId: String
    KeyId: String
    SecurityGroupId: String

参考：https://github.com/aws-cloudformation/aws-cloudformation-resource-providers-awsutilities-commandrunner/tree/master/docs#yaml

在云形成模板中使用 AWSUtility::CloudFormation::CommandRunner 时出错 "Index: 0, Size: 0"

Error "Index: 0, Size: 0" while using AWSUtility::CloudFormation::CommandRunner in cloud formation template

amazon-web-services

aws-cloudformation-custom-resource