boto3如何从实例中检索弹性ip [英] boto3 how to retrieve the elastic ip from an instance

问题描述

我需要执行以下操作:

我有一些包含特定标签的实例，我需要遍历这些实例，对于包含该特定标签的每个实例，如果该实例附加了弹性ip，则需要使用相同的标签来标记该弹性ip..我的代码如下:

I have some instances that contain a certain tag, I need to loop through those instances and for each instance which contains that certain tag, if that instance has an elastic ip attached, I need to tag that elastic ip with that same tag. My code is the following:

import boto3
import json

region_list = ['us-east-1']
session = boto3.Session(profile_name='default')

for region in region_list:
    ec2 = session.resource('ec2',region)
    client = boto3.client('ec2',region)
    # Retrieve instances that contain this specific tag
    instances = ec2.instances.filter(Filters=[{'Name':'tag:MyTargetTag', 'Values':['*']}])

    for instance in instances:
        for tag in instance.tags:
            if tag['Key'] == "MyTargetTag":
                MyTargetTag = tag['Value']
        ## check if this instance has an elasticip
        ## if it has, assign the value of MyTargetTag to it
        response = client.add_tags(
            ResourceArns=[
                #elasticip ip identifier of some sort,
            ],
            Tags=[
                {
                    'Key': 'MyTargetTag',
                    'Value': MyTargetTag
                },
            ]
        )

我已经阅读了文档和视频，但不是全部，但老实说，我并不太完全了解它，而我只是在反复尝试而没有取得任何成功.

I've read through the docs and videos and what not but honestly I don't understand it quite completely and I'm just doing trial and error without any success.

推荐答案

您可以在 boto3.resource('ec2')资源 vpc_addresses 上访问VPC或经典弹性IP.>和 classic_addresses .

You may access VPC or classic Elastic IPs on the boto3.resource('ec2') resources vpc_addresses and classic_addresses respectively.

如果地址已关联，则它们将具有 instance_id 属性.您将可以使用 ec2.Instance(address.instance_id).tags

If the addresses are associated, they will have an instance_id attribute. You'll be able to get the tags with ec2.Instance(address.instance_id).tags

如果要遍历所有地址，则 boto3.client('ec2')客户端具有 describe_addresses ，该信息将为您提供相同的信息.

If you want to go through all addresses, the boto3.client('ec2') client has describe_addresses that will give you the same information.

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