如何通过boto获取IAM政策文件

Question

我试图通过boto获取aws IAM策略的详细信息,以便能够通过脚本备份或复制IAM策略.我搜索了boto 2和3的文档,但没有找到任何获取已配置策略的json数据的可能性.

我(成功)做了什么:

• 通过IAM管理控制台创建策略
• 将其分配给一个角色
• 用它来通过boto创建ec2实例

但我找不到一种方法来检索关联的JSON数据(管理控制台中的"策略文档")以获取它.

我用boto试过的:

import boto.iam
REGION_NAME = 'eu-west-1'
iam_conn = boto.iam.connect_to_region(REGION_NAME)
arn = 'arn:myproperlyformattedarn'
p = iam_conn.get_policy(arn)
print p

结果:

{
    "get_policy_response": {
        "response_metadata": {
            "request_id": "XXXXX-XXXX-XXXX-XXXX-XXXX"
        },
        "get_policy_result": {
            "policy": {
                "update_date": "2016-04-15T12:51:21Z",
                "create_date": "2016-04-15T12:51:21Z",
                "is_attachable": "true",
                "policy_name": "My_Policy_Name",
                "default_version_id": "v1",
                "attachment_count": "1",
                "path": "/",
                "arn": "arn:aws:iam::123456789:policy/VerticaTest_GetConfigsFromS3",
                "policy_id": "XXXSOMELONGSTRINGXXXX"
            }
        }
    }
}

我所追求的是这样的事情(管理控制台中的政策文件):

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "s3:*",
            "Resource": [
                "arn:aws:s3:::mybucketname",
                "arn:aws:s3:::mybucketname/*"
            ]
        }
    ]
}

Answer 1

请转到boto3.

从策略方面进行处理:识别策略ARN,使用ARN识别策略DefaultVersionId,使用ARN和DefaultVersionId检索PolicyDocument.

import boto3
import json

arn = 'arn:aws:iam::aws:policy/AdministratorAccess'

iam = boto3.client('iam')
policy = iam.get_policy(
    PolicyArn = arn
)
policy_version = iam.get_policy_version(
    PolicyArn = arn, 
    VersionId = policy['Policy']['DefaultVersionId']
)

print(json.dumps(policy_version['PolicyVersion']['Document']))
print(json.dumps(policy_version['PolicyVersion']['Document']['Statement']))

运行此代码并将输出传递给"jq".并得到以下输出:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "*",
      "Resource": "*",
      "Effect": "Allow"
    }
  ]
}

[
  {
    "Action": "*",
    "Resource": "*",
    "Effect": "Allow"
  }
]

您在问题中特别请求了操作/声明.我打印了"文档"和"声明"属性以显示差异.

http://boto3.readthedocs.io/en/latest/reference/services/iam.html#IAM.Client.get_policy http://boto3.readthedocs.io/en/latest/reference/services/iam.html#IAM .Client.get_policy_version

Answer 2

请切换到 boto3，因为有更好的支持和文档。正如 boto3 文档中一样， get_policy() 不会为您提供策略文档。

我能得到的最好的是 get_account_authorization_details()

http://boto3.readthedocs.org/en/latest/reference/services/iam.html#IAM.Client.get_account_authorization_details

我在 cli 下进行了快速检查，只需将所有命令替换为 boto3 即可。

aws iam get-account-authorization-details --filter 'LocalManagedPolicy'