使用 Boto 创建 IAM 策略时出现 MalformedPolicyDocumentException

Posted 2023-03-04

【中文标题】使用 Boto 创建 IAM 策略时出现 MalformedPolicyDocumentException

【英文标题】：MalformedPolicyDocumentException while creating IAM policy using Boto

【发布时间】：2021-05-13 01:11:54

【问题描述】：

我正在编写一个使用 python 函数创建 IAM 策略的 boto 脚本。该策略已使用“json.dumps()”转换为 JSON 格式，但 AWS 仍不会将其视为有效格式。 功能是：

##### Global variables ####
region="us-east-2"
instance_type="t2.micro"
ebs_volume_size="20"
meta_template_name="ec2_policy_meta_template"
###############################

start_time_1 = input("What's the start time")
end_time1 = input("What's the end time")
def create_aws_iam_policy_template(**kwargs):
  template_data = 
  template_data["region"] = kwargs.get('region')
  template_data["start_time"] = kwargs.get('end_time')
  template_data["end_time"] = kwargs.get('start_time')
  template_data["instance_type"] = kwargs.get('instance_type')
  template_data["ebs_volume_size"] = kwargs.get('ebs_volume_size')
  template_data["meta_template_name"] = kwargs.get('meta_template_name')

  meta_template_dict = getattr(meta_templates, template_data["meta_template_name"])
  meta_template_json = json.dumps(meta_template_dict)
  template_json = Template(meta_template_json).render(template_data)
  return template_json  


template_json = create_aws_iam_policy_template(
  region=region,
  instance_type=instance_type,
  ebs_volume_size=ebs_volume_size,
  meta_template_name=meta_template_name,
  start_time = start_time_1,
  end_time = end_time1
)

这是我用来将 dict 转换为 JSON 的方法：

app_json = json.dumps(template_json)
print(app_json)

这是 IAM 政策的输出：

""Version": "2012-10-17", "Statement": ["Sid": "VisualEditor0", "Effect": "Allow", "Action": "ec2:RunInstances", "资源": ["arn:aws:ec2:us-east-2::instance/", "arn:aws:ec2:us-east-2::network-interface/", " arn:aws:ec2:us-east-2::key-pair/", "arn:aws:ec2:us-east-2::security-group/", "arn:aws :ec2:us-east-2::subnet/", "arn:aws:ec2:us-east-2::volume/", "arn:aws:ec2:us-east- 2::image/ami-"], "条件": "ForAllValues:NumericLessThanEquals": "ec2:VolumeSize": "20", "ForAllValues:StringEquals": "ec2:InstanceType": " t2.micro", "Sid": "VisualEditor1", "Effect": "Allow", "Action": ["ec2:TerminateInstances", "ec2:StartInstances", "ec2:StopInstances"], "资源”：“arn:aws:ec2:us-east-2::instance/”，“条件”：“ForAllValues:StringEquals”：“ec2:InstanceType”：“t2.micro” 、“Sid”：“VisualEditor2”、“效果”：“允许”、“操作”：[“ec2:Describe*”、“ec2:GetConsole*”、“cloudwatch:DescribeAlarms”、“iam:ListInstanceProfiles”、 “云观察：GetMetricStat istics”、“ec2:DescribeKeyPairs”、“ec2:CreateKeyPair”]、“资源”：“*”、“条件”：“DateGreaterThan”：“aws:CurrentTime”：“2020-06-30T23:59:59Z ", "DateLessThanEquals": "aws:CurrentTime": "2020-04-01T00:00:00Z"]" 这是我在尝试创建 IAM 策略时遇到的错误：

botocore.errorfactory.MalformedPolicyDocumentException: An error occurred (MalformedPolicyDocument) when calling the CreatePolicy operation: Syntax errors in policy.

【问题讨论】：

能否提供更完整的示例代码？您在哪里以及如何生成template_json 并调用CreatePolicy？

我已对问题进行了更改。请检查一下。

【参考方案1】：

尽管我能够通过控制台创建该策略，但总体上的警告太多了。

例如，aws:CurrentTime 应该如下所示：

                "DateGreaterThan": "aws:CurrentTime": "2020-04-01T00:00:00Z",
                "DateLessThan": "aws:CurrentTime": "2020-06-30T23:59:59Z"

ec2:InstanceType 条件没有指定相应的条件值。

  "Version": "2012-10-17",
  "Statement": [
    
      "Sid": "VisualEditor0",
      "Effect": "Allow",
      "Action": "ec2:RunInstances",
      "Resource": [
        "arn:aws:ec2:us-east-2::instance/",
        "arn:aws:ec2:us-east-2::network-interface/",
        "arn:aws:ec2:us-east-2::key-pair/",
        "arn:aws:ec2:us-east-2::security-group/",
        "arn:aws:ec2:us-east-2::subnet/",
        "arn:aws:ec2:us-east-2::volume/",
        "arn:aws:ec2:us-east-2::image/ami-"
      ],
      "Condition": 
        "ForAllValues:NumericLessThanEquals": 
          "ec2:VolumeSize": "20"
        ,
        "ForAllValues:StringEquals": 
          "ec2:InstanceType": ""
        
      
    ,
    
      "Sid": "VisualEditor1",
      "Effect": "Allow",
      "Action": [
        "ec2:TerminateInstances",
        "ec2:StartInstances",
        "ec2:StopInstances"
      ],
      "Resource": "arn:aws:ec2:us-east-2::instance/",
      "Condition": 
        "ForAllValues:StringEquals": 
          "ec2:InstanceType": ""
        
      
    ,
    
      "Sid": "VisualEditor2",
      "Effect": "Allow",
      "Action": [
        "ec2:Describe*",
        "ec2:GetConsole*",
        "cloudwatch:DescribeAlarms",
        "iam:ListInstanceProfiles",
        "cloudwatch:GetMetricStatistics",
        "ec2:DescribeKeyPairs",
        "ec2:CreateKeyPair"
      ],
      "Resource": "*",
      "Condition": 
        "DateGreaterThan": 
          "aws:CurrentTime": "30"
        ,
        "DateLessThanEquals": 
          "aws:CurrentTime": "20"
        
      
    
  ]

【讨论】：

感谢您的回复，我已经更新了两个问题，但我得到了同样的错误，我重新检查了不知道现在可能是什么问题。

@PranaySinghParihar 我建议在IAM Policy Simulator 中进行策略测试。一旦确定这是您需要的策略，您就可以通过代码轻松生成它。

是的，我认为属性很好，但是输出中有这些不符合 IAM 策略格式的反斜杠“\”，但我不知道如何摆脱它。

@PranaySinghParihar 您在帖子中分享的政策是有效的，只是您提出的条件有问题。正如我在回答中所证实的那样。我能够通过console

创建策略

在模拟器中我似乎遇到了一个parcing错误。