承担AWS Lambda中的角色,在SSM调用中拒绝访问

Question

我的Lambda函数中出现错误,该函数调用SSM:

AccessDeniedException:User:arn:aws:sts :: redacted:assume-role/LambdaBackend_master_lambda/SpikeLambda无权执行:ssm:资源上的GetParameter:arn:aws:ssm:eu-west-1:redacted:parameter/default /键/ API

但是,我很确定我正确配置了这个:

使用AssumeRole for Lambda的角色(尽管我们知道它可以从错误消息中获得).

? 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"
    }
}

我的政策是:

? aws iam list-role-policies --role-name LambdaBackend_master_lambda
{
    "PolicyNames": [
        "ssm_read"
    ]
}
? 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"
}

我通过策略模拟器运行它似乎没问题!

Answer 1

今天玩了这个并获得了以下内容,在使用GetParameter操作时,删除ssm:GetParameters和使用ssm:GetParameter似乎工作.即AWS_PROFILE=pstore aws ssm get-parameter --name param_name此weirded我出去了一下,因为我无法找到这在IAM行动文档都在这里.然而它似乎确实有效,而ssm仍然有点记录在案.

{
    "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"
        }
    ]
}

Answer 2

在我的情况（我使用AWS SDK的围棋V2），我需要两ssm:GetParametersByPath，并 ssm:GetParameter使其发挥作用。