背景

在雲計算飛速發展的今天，用戶ECS服務器身處的網絡環境越來越復雜，彈性網卡讓ECS服務器完美遊走在日益復雜的網絡環境中。但是以前服務器必須是Stopped狀態才可以進行彈性網卡(ENI)的插拔，這樣可能會影響運行在服務器上的業務。現在很高興的向大家宣布：彈性網卡從今天開始支持熱插撥，即ECS服務器只要處在穩定狀態(Running Stopped)，就可以對彈性網卡進行插拔操作。

彈性網卡熱插拔：控制臺

• 控制臺操作彈性網卡的位置：進入控制臺 -> 雲服務器 ECS -> 彈性網卡。

• 創建彈性網卡：點擊創建彈性網卡按鈕，在彈窗中填寫網卡名稱，選擇專有網絡 交換機 安全組等信息後創建彈性網卡。
  

• 熱掛載彈性網卡：點擊彈性網卡對應的綁定實例按鈕，在彈窗中選擇要綁定實例。實例狀態只要求為穩定狀態(Running Stopped)。
  

• 熱卸載彈性網卡：點擊彈性網卡對應的解綁實例按鈕，確定即可解綁。實例狀態只要求為穩定狀態(Running Stopped)。
  

彈性網卡熱插拔：OpenAPI

attach_eni detach_eni 分別可以根據彈性網卡ID，實例ID，進行彈性網卡的熱插拔。相關API參考幫助文檔：掛載彈性網卡，卸載彈性網卡。

#  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 4.7.1, you can use command 'pip show aliyun-python-sdk-ecs' to checkimport jsonimport loggingfrom aliyunsdkcore import clientfrom aliyunsdkecs.request.v20140526.CreateNetworkInterfaceRequest import CreateNetworkInterfaceRequestfrom aliyunsdkecs.request.v20140526.AttachNetworkInterfaceRequest import AttachNetworkInterfaceRequestfrom aliyunsdkecs.request.v20140526.DetachNetworkInterfaceRequest import DetachNetworkInterfaceRequestfrom aliyunsdkecs.request.v20140526.DeleteNetworkInterfaceRequest import DeleteNetworkInterfaceRequest# 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')# send open api requestdef _send_request(request):
    request.set_accept_format('json')    try:
        response_str = clt.do_action(request)
        logging.info(response_str)
        response_detail = json.loads(response_str)        return response_detail    except Exception as e:
        logging.error(e)# create enidef create_eni(vSwitchId, securityGroupId, networkInterfaceName=None, primaryIpAddress=None, description=None,
               clientToken=None):
    request = CreateNetworkInterfaceRequest()
    request.set_VSwitchId(vSwitchId)
    request.set_SecurityGroupId(securityGroupId)    if (networkInterfaceName != None):
        request.set_NetworkInterfaceName(networkInterfaceName)    if (primaryIpAddress != None):
        request.set_PrimaryIpAddress(primaryIpAddress)    if (description != None):
        request.set_Description(description)    if (clientToken != None):
        request.set_ClientToken(clientToken)
    _send_request(request)# attach eni to instancedef attach_eni(eniId, instanceId):
    request = AttachNetworkInterfaceRequest()
    request.set_NetworkInterfaceId(eniId)
    request.set_InstanceId(instanceId)
    _send_request(request)# detach eni from instancedef detach_eni(eniId, instanceId):
    request = DetachNetworkInterfaceRequest()
    request.set_NetworkInterfaceId(eniId)
    request.set_InstanceId(instanceId)
    _send_request(request)# delete enidef delete_eni(eniId):
    request = DeleteNetworkInterfaceRequest()
    request.set_NetworkInterfaceId(eniId)
    _send_request(request)if __name__ == '__main__':
    clt = client.AcsClient('Your Access Key Id', 'Your Access Key Secrect', 'cn-zhangjiakou')
    vSwitchId = "vsw-test"
    securityGroupId = "sg-test"
    # create_eni(vSwitchId=vSwitchId, securityGroupId=securityGroupId)

    attach_eniId = "eni-test"
    attach_instanceId = "i-test"
    # attach_eni(attach_eniId, attach_instanceId)

    detach_eniId = "eni-test"
    detach_instanceId = "i-test"
    # detach_eni(detach_eniId, detach_instanceId)

    delete_eniId = "eni-test"
    # delete_eni(delete_eniId)

小結

現在的彈性網卡熱插拔只要求實例為穩定狀態即可，改進了以前實例只能為Stopped狀態才能插拔彈性網卡的現狀。提升了用戶體驗，現在服務器不用關機就能輕松配置彈性網卡，更加靈活實用。

原文鏈接

【產品功能】配置網卡從此與關機無緣，彈性網卡支持熱插拔功能