使用 Cloudformation 在 S3 存储桶内创建文件夹

我可以使用 cloudformation 创建 S3 存储桶，但想在 S3 存储桶内创建一个文件夹..like

<mybucket>--><myfolder>

请让我知道用于在存储桶内创建文件夹的模板...两者应同时创建...

我正在使用 AWS lambda，如下所示

stackname = 'myStack'
client = boto3.client('cloudformation')
response = client.create_stack(
    StackName= (stackname),
    TemplateURL= 'https://s3.amazonaws.com/<myS3bucket>/<myfolder>/nestedstack.json',
    Parameters=<params>
)

AWS 不提供官方 CloudFormation 资源来在 S3 存储桶中创建对象。但是，您可以创建一个Lambda 支持的自定义资源 http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-custom-resources-lambda.html使用 AWS SDK 执行此功能，实际上gilt/cloudformation-helpers https://github.com/gilt/cloudformation-helpers#put-s3-objectsGitHub 存储库提供了一个现成的自定义资源来完成此任务。

与任何自定义资源设置一样，它有点冗长，因为您需要首先部署 Lambda 函数和 IAM 权限，然后将其作为堆栈模板中的自定义资源引用。

首先，添加Lambda::Function以及相关的IAM::Role堆栈模板的资源：

"S3PutObjectFunctionRole": {
  "Type": "AWS::IAM::Role",
  "Properties": {
    "AssumeRolePolicyDocument": {
      "Version" : "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Principal": {
            "Service": [ "lambda.amazonaws.com" ]
          },
          "Action": [ "sts:AssumeRole" ]
        }
      ]
    },
    "ManagedPolicyArns": [
      { "Ref": "RoleBasePolicy" }
    ],
    "Policies": [
      {
        "PolicyName": "S3Writer",
        "PolicyDocument": {
          "Version" : "2012-10-17",
          "Statement": [
            {
              "Effect": "Allow",
              "Action": [
                "s3:DeleteObject",
                "s3:ListBucket",
                "s3:PutObject"
              ],
              "Resource": "*"
            }
          ]
        }
      }
    ]
  }
},
"S3PutObjectFunction": {
  "Type": "AWS::Lambda::Function",
  "Properties": {
    "Code": {
      "S3Bucket": "com.gilt.public.backoffice",
      "S3Key": "lambda_functions/cloudformation-helpers.zip"
    },
    "Description": "Used to put objects into S3.",
    "Handler": "aws/s3.putObject",
    "Role": {"Fn::GetAtt" : [ "S3PutObjectFunctionRole", "Arn" ] },
    "Runtime": "nodejs",
    "Timeout": 30
  },
  "DependsOn": [
    "S3PutObjectFunctionRole"
  ]
},

然后，您可以使用 Lambda 函数作为自定义资源来创建 S3 对象：

"MyFolder": {
  "Type": "Custom::S3PutObject",
  "Properties": {
    "ServiceToken": { "Fn::GetAtt" : ["S3PutObjectFunction", "Arn"] },
    "Bucket": "mybucket",
    "Key": "myfolder/"
  }
},

您还可以使用相同的自定义资源通过添加Body参数除了Bucket and Key（参见docs https://github.com/gilt/cloudformation-helpers#put-s3-objects).