：查詢ECS執行個體

運行以下命令，安裝Python SDK：

pip install aliyun-python-sdk-ecs

如果提示您沒有許可權，請切換sudo繼續執行。

sudo pip install aliyun-python-sdk-ecs

本文的完整代碼如下所示，您可以自行根據實際情況修改代碼內容。

#  coding=utf-8
# if the python sdk is not install using 'sudo pip install aliyun-python-sdk-ecs'
# if the python sdk is install using 'sudo pip install --upgrade aliyun-python-sdk-ecs'
# make sure the sdk version is greater than 2.1.2, you can use command 'pip show aliyun-python-sdk-ecs' to check
import json
import logging
import os
from aliyunsdkcore import client
from aliyunsdkecs.request.v20140526.DescribeInstancesRequest import DescribeInstancesRequest
from aliyunsdkecs.request.v20140526.DescribeRegionsRequest import DescribeRegionsRequest
# configuration the log output formatter, if you want to save the output to file,
# append ",filename='ecs_invoke.log'" after datefmt.

logging.basicConfig(level=logging.INFO, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', datefmt='%a %d %b %Y %H:%M:%S')

# 請確保代碼運行環境設定了環境變數 ALIBABA_CLOUD_ACCESS_KEY_ID 和 ALIBABA_CLOUD_ACCESS_KEY_SECRET。
# 工程代碼泄露可能會導致 AccessKey 泄露，並威脅帳號下所有資源的安全性。以下程式碼範例使用環境變數擷取 AccessKey 的方式進行調用，僅供參考，建議使用更安全的 STS 方式
# 將<RegionId>變數替換為您待查詢的ECS執行個體所屬的地區ID，阿里雲支援的地區資訊您可以調用DescribeRegions查看。
clt = client.AcsClient(os.environ['ALIBABA_CLOUD_ACCESS_KEY_ID'], os.environ['ALIBABA_CLOUD_ACCESS_KEY_SECRET'], '<RegionId>')

# sample api to list aliyun open api.
def hello_aliyun_regions():
    request = DescribeRegionsRequest()
    response = _send_request(request)
    if response is not None:
        region_list = response.get('Regions').get('Region')
        assert response is not None
        assert region_list is not None
        result = map(_print_region_id, region_list)
        logging.info("region list: %s", list(result))

# output the instance owned in current region.
def list_instances():
    request = DescribeInstancesRequest()
    request.set_accept_format('json')
    # 佈建要求參數的範例程式碼如下，表示進行分頁查詢，set_PageNumber指定查詢第1頁的內容，set_PageSize指定當前頁顯示2條資料。
    request.set_PageNumber(1)
    request.set_PageSize(2)
    response = _send_request(request)
    if response is not None:
        instance_list = response.get('Instances').get('Instance')
        result = map(_print_instance_id, instance_list)
        logging.info("current region include instance %s", list(result))

def _print_instance_id(item):
    instance_id = item.get('InstanceId')
    return instance_id

def _print_region_id(item):
    region_id = item.get("RegionId")
    return region_id

# send open api request
def _send_request(request):
    request.set_accept_format('json')
    try:
        response_str = clt.do_action_with_exception(request)
        logging.info(response_str)
        response_detail = json.loads(response_str)
        return response_detail
    except Exception as e:
        logging.error(e)

if __name__ == '__main__':
    logging.info("Hello Aliyun OpenApi!")
    hello_aliyun_regions()
    list_instances()

完成執行個體化後。查詢當前帳號支援的地區列表。更多資訊，請參見DescribeRegions。

def hello_aliyun_regions():
    request = DescribeRegionsRequest()
    response = _send_request(request)
    region_list = response.get('Regions').get('Region')
    assert response is not None
    assert region_list is not None
    result = map(_print_region_id, region_list)
    logging.info("region list: %s", list(result))
def _print_region_id(item):
    region_id = item.get("RegionId")
    return region_id
def _send_request(request):
    request.set_accept_format('json')
    try:
        response_str = clt.do_action_with_exception(request)
        logging.info(response_str)
        response_detail = json.loads(response_str)
        return response_detail
    except Exception as e:
        logging.error(e)
hello_aliyun_regions()

在命令列運行python hello_ecs_api.py會得到當前支援的Region列表。輸出樣本如下：

region list: ['cn-qingdao', 'cn-beijing', 'cn-zhangjiakou', 'cn-huhehaote', 'cn-wulanchabu', 'cn-hangzhou', 'cn-shanghai', 'cn-shenzhen', 'cn-heyuan', 'cn-guangzhou', 'cn-chengdu', 'cn-hongkong', 'ap-northeast-1', 'ap-southeast-1', 'ap-southeast-3', 'ap-southeast-5', 'us-east-1', 'us-west-1', 'eu-west-1']

輸出結果樣本如下：

current region include instance ['i-bp165p6xk2tmdhj0****', 'i-bp1a01zbqmsun5odo****'']