amazon-web-services - 在 AWS Lambda 中担任角色，在 SSM 调用时拒绝访问

Question

我在调用 SSM 的 Lambda 函数中遇到错误:

AccessDeniedException: User: arn:aws:sts::redacted:assumed-role/LambdaBackend_master_lambda/SpikeLambda is not authorized to perform: ssm:GetParameter on resource: arn:aws:ssm:eu-west-1:redacted:parameter/default/key/api

但是，我很确定我正确配置了这个:

角色，使用 Lambda 的 AssumeRole(尽管我们知道从错误消息中可以工作)。

λ aws iam get-role --role-name LambdaBackend_master_lambda
{
    "Role": {
        "AssumeRolePolicyDocument": {
            "Version": "2012-10-17",
            "Statement": [
                {
                    "Action": "sts:AssumeRole",
                    "Effect": "Allow",
                    "Principal": {
                        "Service": "lambda.amazonaws.com"
                    }
                }
            ]
        },
        "RoleId": "redacted",
        "CreateDate": "2017-06-23T20:49:37Z",
        "RoleName": "LambdaBackend_master_lambda",
        "Path": "/",
        "Arn": "arn:aws:iam::redacted:role/LambdaBackend_master_lambda"
    }
}

我的政策:

λ aws iam list-role-policies --role-name LambdaBackend_master_lambda
{
    "PolicyNames": [
        "ssm_read"
    ]
}
λ aws iam get-role-policy --role-name LambdaBackend_master_lambda --policy-name ssm_read
{
    "RoleName": "LambdaBackend_master_lambda",
    "PolicyDocument": {
        "Version": "2012-10-17",
        "Statement": [
            {
                "Action": [
                    "ssm:DescribeParameters"
                ],
                "Resource": "*",
                "Effect": "Allow"
            },
            {
                "Action": [
                    "ssm:GetParameters"
                ],
                "Resource": "arn:aws:ssm:eu-west-1:redacted:parameter/*",
                "Effect": "Allow"
            }
        ]
    },
    "PolicyName": "ssm_read"
}

我已经通过策略模拟器运行它，它似乎很好!

Answer 1

今天玩了这个，得到了以下结果，从 ssm:GetParameters 中删除了 s并使用 ssm:GetParameter使用 GetParameter 操作时似乎有效。即AWS_PROFILE=pstore aws ssm get-parameter --name param_name .这让我有点奇怪，因为我在 iam 操作文档 here 中根本找不到这个。 .然而，它似乎确实有效，并且 ssm 仍然有点缺乏记录。
亚马逊已经更新并移动了它的文档。新docs包括ssm:GetParameters和 ssm:GetParameter .

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "ssm:DescribeParameters"
            ],
            "Resource": "*",
            "Effect": "Allow"
        },
        {
            "Action": [
                "ssm:GetParameter"
            ],
            "Resource": "arn:aws:ssm:eu-west-1:redacted:parameter/*",
            "Effect": "Allow"
        }
    ]
}