26

I'm trying to use Elasticsearch for data storage for a Lambda function connected to Alexa Skills Kit. The Lambda works alright without Elasticsearch but ES provides much-needed fuzzy matching.

The only way I've been able to access it from Lambda is by enabling Elasticsearch global access but that's a really bad idea. I've also been able to access from my computer via open access policy or IP address policy. Is there a way to do read-only access via Lambda and read-write via IP?

On IAM I granted my Lambda role AmazonESReadOnlyAccess. On the ES side I tried this but it only worked for IP address:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": [
          "arn:aws:iam::NUMBER:root",
          "arn:aws:iam::NUMBER:role/lambda_basic_execution"
        ]
      },
      "Action": "es:*",
      "Resource": "arn:aws:es:us-east-1:NUMBER:domain/NAME/*"
    },
    {
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "AWS": "*"
      },
      "Action": "es:*",
      "Resource": "arn:aws:es:us-east-1:NUMBER:domain/NAME/*",
      "Condition": {
        "IpAddress": {
          "aws:SourceIp": "MY IP"
        }
      }
    }
  ]
}

This forum post asks the same question but went unanswered.

4

5 回答 5

14

我知道的唯一方法是在您的 ES 域上使用基于资源的策略或基于 IAM 的策略。这将限制对特定 IAM 用户或角色的访问。但是，要完成这项工作，您还需要使用 SigV4 对 ES 的请求进行签名。

有一些库可以为您进行这种签名，例如，这个库扩展了流行的 Python 请求库以通过 SigV4 对 ElasticSearch 请求进行签名。我相信其他语言也存在类似的库。

于 2016-06-08T01:52:29.823 回答
14

现在可以从您的代码中使用elasticsearch.js。在您尝试之前，您必须安装http-aws-es模块。

const AWS = require('aws-sdk');
const httpAwsEs = require('http-aws-es');
const elasticsearch = require('elasticsearch');

const client = new elasticsearch.Client({
    host: 'YOUR_ES_HOST',
    connectionClass: httpAwsEs,
    amazonES: {
        region: 'YOUR_ES_REGION',
        credentials: new AWS.EnvironmentCredentials('AWS')
    }
});

// client.search({...})

当然，在使用之前，先配置对elasticsearch域的访问： 在此处输入图像描述

于 2018-12-10T15:30:06.247 回答
5

对于对 Elasticsearch 集群的外部（AWS 外部）访问，您希望使用基于 IP 的访问策略创建集群。如下所示：

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "AWS": "*"
      },
      "Action": "es:*",
      "Condition": {
        "IpAddress": {
          "aws:SourceIp": [
            "<<IP/CIDR>>"
          ]
        }
      },
      "Resource": "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/*"
    }
  ]
}

对于您的 Lambda 函数，使用以下策略片段创建 Lambda 函数将代入的角色。 

{
  "Sid": "",
  "Effect": "Allow",
  "Action": [
    "es:DescribeElasticsearchDomain",
    "es:DescribeElasticsearchDomains",
    "es:DescribeElasticsearchDomainConfig",
    "es:ESHttpPost",
    "es:ESHttpPut"
  ],
  "Resource": [
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/*"
  ]
},
{
  "Sid": "",
  "Effect": "Allow",
  "Action": [
    "es:ESHttpGet"
  ],
  "Resource": [
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_all/_settings",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_cluster/stats",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/<<INDEX>>*/_mapping/<<TYPE>>",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_nodes",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_nodes/stats",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_nodes/*/stats",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/_stats",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/<<INDEX>>*/_stats"
  ]
}

我认为您可以更轻松地将上述两个政策声明浓缩为以下内容：

{
  "Sid": "",
  "Effect": "Allow",
  "Action": [
    "es:DescribeElasticsearchDomain",
    "es:DescribeElasticsearchDomains",
    "es:DescribeElasticsearchDomainConfig",
    "es:ESHttpPost",
    "es:ESHttpGet",
    "es:ESHttpPut"
  ],
  "Resource": [
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>",
    "arn:aws:es:<<REGION>>:<<ACCOUNTID>>:domain/<<DOMAIN_NAME>>/*"
  ]
}

我设法从以下来源将上述内容拼凑在一起：

https://aws.amazon.com/blogs/security/how-to-control-access-to-your-amazon-elasticsearch-service-domain/

如何从 Amazon elasticsearch 服务访问 Kibana？

https://forums.aws.amazon.com/thread.jspa?threadID=217149

于 2017-04-10T15:18:56.200 回答
4

您需要转到 Lambda 的访问策略并提供 AWS ARN 以进行连接

http://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/es-aws-integrations.html#es-aws-integrations-s3-lambda-es-authorizations

于 2017-06-19T19:07:30.340 回答
1

AWS Lambda 在公共 EC2 实例上运行。因此，简单地将 IP 地址白名单添加到 Elasticsearch 访问策略是行不通的。一种方法是为 Lambda 执行角色授予对 Elasticsearch 域的适当权限。确保 Lambda 执行角色对 ES 域具有权限，并且 ES 域访问策略具有允许此 Lambda 角色 ARN 执行适当操作的语句。完成此操作后，您要做的就是在访问 ES 端点时通过 SigV4 签署您的请求，

希望对您有所帮助！

于 2016-08-25T03:55:18.740 回答