amazon-web-services - AWS ElasticSearch 从账户 "A"中的 lambda 写入账户 "B"

Question

我在账户“A”中有一个 AWS ElasticSearch 集群。

我正在尝试在帐户“B”中创建一个 lambda(从 DynamoDB 流触发)，它将写入帐户“A”中的 ES。

我收到以下错误:

{
"Message":"User: arn:aws:sts::AccountB:assumed-role/lambdaRole1/sourceTableToES is not authorized to perform: es:ESHttpPost on resource: beta-na-lifeguard"
}

我曾尝试将 STS 和 ROLE 放入 ES 访问策略(在帐户“A”中)，但没有成功。这是我的政策:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::AccountA:user/beta-elasticsearch-admin"
      },
      "Action": "es:*",
      "Resource": "*"
    },
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": [
          "arn:aws:iam::AccountA:user/beta-elasticsearch-readwrite",
          "arn:aws:iam::AccountA:role/beta-na-DynamoDBStreamLambdaElasticSearch",
          "arn:aws:sts::AccountB:assumed-role/lambdaRole1/sourceTableToES",
          "arn:aws:iam::AccountB:role/service-role/lambdaRole1"
        ]
      },
      "Action": [
        "es:ESHttpGet",
        "es:ESHttpPost",
        "es:ESHttpPut"
      ],
      "Resource": "*"
    }
  ]
}

Answer 1

在我上面的代码中，我添加了 arn:aws:sts::AccountB:assumed-role/lambdaRole1/sourceTableToSNS进入 AccountA ES 访问列表，这是错误的。而是执行以下操作:

我已经有了 arn:aws:iam::AccountA:role/beta-na-DynamoDBStreamLambdaElasticSearch在 ES 访问列表中，我需要为 AccountB 可代入的角色添加信任关系(从 IAM 角色屏幕)。我将其添加到信任关系中:

{
  "Effect": "Allow",
  "Principal": {
    "AWS": "arn:aws:iam::AccountB:root"
  },
  "Action": "sts:AssumeRole"
}

然后，在我的 accountB lambda 代码中，我需要承担该角色。这是来自 lambda 的相关代码。

var AWS = require('aws-sdk');
var sts = new AWS.STS({ region: process.env.REGION });
var params = {
    RoleSessionName: "hello-cross-account-session",
    RoleArn: "arn:aws:iam::accountA:role/beta-na-DynamoDBStreamLambdaElasticSearch",
    DurationSeconds: 900
};
sts.assumeRole(params, function (err, data) {
    if (err) {
        console.log(err, err.stack); // an error occurred
        context.fail('failed to assume role ' + err);
        return;
    }
    log("assumed role successfully! %j", data)
    postToES(bulkUpdateCommand, context);
});