未获取完整的亚马逊网络服务ec2列表

Question

我已经编写了一个python-boto3脚本来从帐户和区域获取所有aws实例列表。脚本运行正常，并按预期获得csv格式的输出(仅获得一个预留编号下的一个实例，因此剩余实例将丢失)问题是无法正确获取所有aws实例列表。例如，我在aws账户中总共有5个实例

          Instance-1 and Instance-2 are with  Reservation1 number               Instance-3 and Instance-4 are with  Reservation2 number              Instance-5 is with Reservation3 number  I am getting only 3 instances list in csv format instead of 5 instances. please look at the below script , please help me how can I get all aws instances list irrespective of reservation number.

output = "Prod.csv"    
     ec = boto3.client('ec2', config=config, region_name=rg)

        def get_tags():
            tag_list = []
            resp =  ec.describe_instances()
            tag_result = [['Name','InstanceId','State','bt:product','bt:environment-type','bt:environment-name']]
            for ec2 in resp['Reservations']:
                tag_list = []
                try:
                    ecName = next(item for item in ec2['Instances'][0]['Tags'] if item['Key'] == 'Name')['Value']
                    tag_list.append(ecName)
                except:
                    ecName = 'Null'
                    tag_list.append(ecName)
                insId = ec2['Instances'][0]['InstanceId']
                instanceID = str(insId)
                tag_list.append(instanceID)
                state = ec2['Instances'][0]['State']['Name']
                tag_list.append(state)
                try:
                    btprod = next(item for item in ec2['Instances'][0]['Tags'] if item['Key'] == 'bt:product')['Value']
                    tag_list.append(btprod)
                except:
                    btprod = 'Null'
                    tag_list.append(btprod)
                try:
                    btenvtype = next(item for item in ec2['Instances'][0]['Tags'] if item['Key'] == 'b1:environment-type')['Value']
                    tag_list.append(btenvtype)
                except:
                    btenvtype = 'Null'
                    tag_list.append(btenvtype)
                try:
                    btenvname = next(item for item in ec2['Instances'][0]['Tags'] if item['Key'] == 'b1:environment-name')['Value']
                    tag_list.append(btenvname)
                except:
                    btenvname = 'Null'
                    tag_list.append(btenvname)
                tag_result.append(tag_list)
            return tag_result
        def main():

            tag = get_tags()
            with open(output,'w') as resultFile:
                wr = csv.writer(resultFile, dialect='excel')
                wr.writerows(tag)
                log = open(output, 'r').read()

Answer 1

以下是基于我在your other question中提供的答案的程序的更新版本

import boto3
import csv

output = "Prod.csv"    
ec2_client = boto3.client('ec2')

def get_tag(instance, tag_name):

    # Find tag on instance
    if 'Tags' in instance:
        for tag in instance['Tags']:
            if tag['Key'] == tag_name:
                return tag['Value']

    # Not found
    return 'Null'

def get_all_tags():

    # Add header row
    tag_result = [['Name','InstanceId','State','bt:product','bt:environment-type','bt:environment-name']]

    response = ec2_client.describe_instances()

    for reservation in response['Reservations']:
        for instance in reservation['Instances']:

            tag_list = []
            tag_list.append(get_tag(instance, 'Name'))
            tag_list.append(instance['InstanceId'])
            tag_list.append(instance['State']['Name'])

            for tag in ['bt:product','bt:environment-type','bt:environment-name']:
                tag_list.append(get_tag(instance, tag))

            tag_result.append(tag_list)

    return tag_result

def main():

    all_tags = get_all_tags()
    with open('output.csv','w') as resultFile:
        wr = csv.writer(resultFile, dialect='excel')
        wr.writerows(all_tags)

main()