blocks|key|483539|text|您应该能够通过向：http://169.254.169.254/latest/meta-data/instance-id发送一个请求来获取当前的实例id。这只在ec2中有效。这样，您就可以访问有关该实例的大量信息。但是，标签看起来并不包括在内。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|483540|您应该能够使用实例id和正确的身份验证来获取实例标签。如果您要在实例上运行此命令，您可能希望为IAM用户提供有限的访问权限，而不是有权访问所有内容的用户，以防实例受到威胁。|483541|entityMap^0|9|1F|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

You should be able to get the current instance id by sending a request to: <code>http://169.254.169.254/latest/meta-data/instance-id</code>. This only works within ec2. With this you can access quite a bit of information about the instance. However, tags do not appear to be included.

You should be able to take the instance id along with the correct authentication to get the instance tags. If you are going to run this on an instance, you may want to provide an IAM user with limited access instead of a user which has access to everything in case the instance is compromised.

blocks|key|487289|text|虽然使用用户数据可能是最简单的解决方案，但OP专门询问了标签的问题，不幸的是，亚马逊并没有让这件事变得尽可能容易。然而，这是可以做到的。您想要使用2个amazon服务的组合。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|487290|487291|首先，您需要获取实例ID。可以通过在您的实例中点击URL来实现：|ordered-list-item|487292|487293|如果您有了资源ID，您将需要使用亚马逊的EC2+http://169.254.169.254/latest/meta-data/instance-id|offset|length|style|CODE|487294|Once来访问标记。既然你说你在使用Java，我建议你使用AWS+SDK+amazon+makes+available。在这个软件开发工具包中，您将找到一个名为describeTags+(documentation)的方法。您可以使用资源ID作为筛选器之一，以获取实例的特定标签。支持的筛选器包括|unordered-list-item|487295|487296|标记关键字-id资源类型资源|487297|我建议在引导时使用cloud-init之类的东西进行检索，并将标记缓存到服务器上，以便在必要时使用。|487298|entityMap|0|LINK|mutability|MUTABLE|url|http://aws.amazon.com/sdkforjava/|1|http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/index.html^0|0|0|0|0|O|1F|0|28|C|T|U|0|2M|D|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|16|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|18|8|@$I|19|J|1A|K|L]]|9|@]|A|$]]|$1|M|3|N|5|O|7|1B|8|@$I|1C|J|1D|K|L]]|9|@$I|1E|J|1F|1|1G]|$I|1H|J|1I|1|1J]]|A|$]]|$1|P|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1L|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1M|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]|12|$5|X|Y|Z|A|$10|13]]]]

While using user-data may be the simplest solution, the OP was asking specifically about the tagging, and unfortunately amazon hasn't made this as easy as it could be. However, It can be done. You want to use a combination of 2 amazon services.

<ol>
<li>First you need to retrieve the Instance ID. This can be achieved by hitting the URL from within your instance:

<code>http://169.254.169.254/latest/meta-data/instance-id</code></li>
<li>Once you have the resource ID, you'll want to use Amazon's EC2 API to access the tags. Since you said you're using Java, I would suggest the Using the <a href="http://aws.amazon.com/sdkforjava/" rel="nofollow">AWS SDK amazon makes available</a>. Within this SDK you'll find a method called <code>describeTags</code> (<a href="http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/index.html" rel="nofollow">documentation</a>). You can use a Resource ID as one of the filters to get the specific tags to your instance. Supported filters are

<pre><code>tag key
resource-id
resource-type
</code></pre></li>
</ol>

I suggest doing this retrieval at boot using something like cloud-init and caching the tags on your server for use later if necessary.

blocks|key|487310|text|这应该会帮助你开始...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|487311|String+instanceId+=+EC2MetadataUtils.getInstanceId();
AmazonEC2+client+=+AmazonEC2ClientBuilder.standard()
++++.withCredentials(new+DefaultAWSCredentialsProviderChain())
++++.build();
DescribeTagsRequest+req+=+new+DescribeTagsRequest()
++++.withFilters(new+Filter("resource-id",+Collections.singletonList(instanceId)));
DescribeTagsResult+describeTagsResult+=+client.describeTags(req);
List<TagDescription>+tags+=+describeTagsResult.getTags()|code-block|syntax|javascript|487312|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This should help you get started...

<pre><code>String instanceId = EC2MetadataUtils.getInstanceId();
AmazonEC2 client = AmazonEC2ClientBuilder.standard()
 .withCredentials(new DefaultAWSCredentialsProviderChain())
 .build();
DescribeTagsRequest req = new DescribeTagsRequest()
 .withFilters(new Filter("resource-id", Collections.singletonList(instanceId)));
DescribeTagsResult describeTagsResult = client.describeTags(req);
List&lt;TagDescription&gt; tags = describeTagsResult.getTags()
</code></pre>

So I have a java program running within an Amazon EC2 instance. Is there a way to programatically get its own tags? I have tried instantiating a new AmazonEC2Client to us the describeTags() function but it only gives me null. Any help would be appreciated thank you.

Edit: To make things clearer, the instances are going to be unmanned worker machines spun up to solely do some computations

In java, how can I get an Amazon EC2 Instance to see its own tags?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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所以我有一个在亚马逊EC2实例中运行的java程序。有没有办法通过编程获得它自己的标签？我曾尝试用describeTags()函数实例化一个新的AmazonEC2Client，但它只给我提供了null。任何帮助都将不胜感激，谢谢。编辑:为了让事情变得更清楚，实例将是无人值守的工人机器，旋转起来只做一些计算

问在java中，如何让Amazon EC2实例看到它自己的标签？
EN

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问在java中，如何让Amazon EC2实例看到它自己的标签？EN