py脚本---------自动切换ECS的EIP

切换ecs的eip的脚本
调用顺序：

1. 8 按顺序执行函数

2. 1 getEcsEip函数获取ecs信息-->

3. 6 unassociate_eip_address函数解绑并调用

4. 3 函数ReleaseEipAddress释放eip -->

5. 4 apply_eip函数创建新的EIP -->

6. 5 associate_eip_address函数申请将新EIP绑定到对应区域ecs -->

7. 7 get_eip_info函数从request中获取eip地址并放入response -->

8. 2 dingdingtalksend函数发送消息给钉钉

cat eip_quick_optv3.py

# encoding=utf-8
import sys
import json
from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.acs_exception.exceptions import ClientException
from aliyunsdkcore.acs_exception.exceptions import ServerException
from aliyunsdkvpc.request.v20160428.AllocateEipAddressRequest import AllocateEipAddressRequest
from aliyunsdkvpc.request.v20160428.AssociateEipAddressRequest import AssociateEipAddressRequest
from aliyunsdkvpc.request.v20160428.UnassociateEipAddressRequest import UnassociateEipAddressRequest
from aliyunsdkvpc.request.v20160428.DescribeEipAddressesRequest import DescribeEipAddressesRequest
from aliyunsdkvpc.request.v20160428.ReleaseEipAddressRequest import ReleaseEipAddressRequest
from aliyunsdkecs.request.v20140526.DescribeInstancesRequest import DescribeInstancesRequest
import time
import redis
import requests
import os
import psutil

#阿里云access key信息及区域
client = AcsClient('xx', 'yy', 'cn-shenzhen')

#需要切换的ecs实例ID
ecsinstanceids = ['i-wz1', 'i-wz2', 'i-wz3', 'i-wz4', 'i-wz5','i-wz6']

#新eip的列表
neweiplist = []


#1查看ecs具体Instance信息，包含eip信息
def getEcsEip(ecsinstanceids):
    #调用查询ecs信息的SDK
    request = DescribeInstancesRequest()
    request.set_accept_format('json')
    request.set_PageSize(100)
    request.set_InstanceIds(ecsinstanceids)
    response = client.do_action_with_exception(request)
    return json.loads(response)['Instances']['Instance']

#2.发送消息到钉钉群
def dingdingtalksend(bjname,sj):
    dingdingurl = 'https://oapi.dingtalk.com/robot/send?

access_token=8a3fafa133d1a5820efdb05aa40dbfa357fe3767386cffa1d6887492c0309422'
    data = json.dumps({'msgtype': 'markdown','markdown': {'title':'代理切换中','text': '生产环境EIP切换消息:  


'+bjname+'
'+sj} })
    r = requests.post(dingdingurl, data, headers={'Content-Type': 'application/json;charset=utf-8'})
    print(r.text)


#3.释放指定的弹性公网IP，传参：json格式，指定eip的id（eipid）
def ReleaseEipAddress(eipid, encoding='utf-8'):
    #ReleaseEipAddressRequest
    request = ReleaseEipAddressRequest()
    request.set_accept_format('json')
    request.set_AllocationId(eipid)
    client.do_action_with_exception(request)

#4.创建新的EIP，传参：json格式，带宽峰值5M，线路类型BGP，后付费模式，按使用流量付费，
def apply_eip(encoding='utf-8'):
    request = AllocateEipAddressRequest()
    request.set_accept_format('json')
    request.set_Bandwidth("5")
    request.set_ISP("BGP")
    request.set_InstanceChargeType("PostPaid")
    request.set_InternetChargeType("PayByTraffic")
    response = client.do_action_with_exception(request)
    return dict(json.loads(str(response, encoding='utf-8')))['AllocationId']

#5.申请将新EIP绑定到对应区域ecs,传参：json格式，指定eip的id（eipid），指定ecs的实例id（ecs_id），实例类型为ecs
def associate_eip_address(eip_id, ecs_id, encoding='utf-8'):
    request = AssociateEipAddressRequest()
    request.set_accept_format('json')
    request.set_InstanceId(eip_id)
    request.set_AllocationId(ecs_id)
    request.set_InstanceType("EcsInstance")
    client.do_action_with_exception(request)
    print("申请绑定新EIP:", ecs_id)

#6.解绑并释放ecs_id中的eip_id，传参：
def unassociate_eip_address(eip_id, ecs_id, encoding='utf-8'):
    #调用释放eip接口UnassociateEipAddressRequest
    request = UnassociateEipAddressRequest()
    request.set_accept_format('json')
    request.set_AllocationId(ecs_id)
    request.set_InstanceId(eip_id)
    request.set_InstanceType("EcsInstance")
    response = client.do_action_with_exception(request)
    print("解绑并释放EIP:", ecs_id)
    time.sleep(4)
    #释放指定的eip
    ReleaseEipAddress(ecs_id, encoding='utf-8')

#7.从request中获取eip地址并放入response
def get_eip_info(encoding='utf-8'):
    request = DescribeEipAddressesRequest()
    request.set_accept_format('json')
    request.set_PageSize(100)
    response = client.do_action_with_exception(request)
    return json.loads(str(response, encoding='utf-8'))

#8.实例化后执行的内容
def main():
    #调用getEcsEip函数
    for ecsinfo in getEcsEip(ecsinstanceids):
	#获取ecs对应eip实例ID放入到response
        AllocationId = ecsinfo['EipAddress']['AllocationId']
	#获取ecs的实例ID
        InstanceId = ecsinfo['InstanceId']
        print(AllocationId)
        print(InstanceId)
	#如果eip实例ID值存在，就调用unassociate_eip_address函数解绑并释放eip，调用apply_eip函数创建eip
	#InstanceId是eip_id,AllocationId是ecs_id
        if AllocationId:
            unassociate_eip_address(InstanceId, AllocationId, encoding='utf-8')
            newAllocationId = apply_eip()
        #如果eip实例ID值不存在，也调用apply_eip函数创建eip
        else:
            newAllocationId = apply_eip()
        #调用associate_eip_address函数将新eip绑定到ecs实例ID中
        associate_eip_address(InstanceId, newAllocationId, encoding='utf-8')
    #调用get_eip_info函数从request中获取eip地址并放入response
    eipinfo = get_eip_info()
    #循环判断ecs实例ID并命一个别名，后面发给钉钉
    for eipline in eipinfo['EipAddresses']['EipAddress']:
        obj = {}
        if eipline['InstanceId'] in ecsinstanceids:
            if eipline['InstanceId'] == 'i-wz9ipft9swsqvwi40637':
                Name = 'proxy1'
            elif eipline['InstanceId'] == 'i-wz9ipft9swsqvwi40639':
                Name = 'proxy2'
            elif eipline['InstanceId'] == 'i-wz9ipft9swsqvwi4063b':
                Name = 'proxy3'
            elif eipline['InstanceId'] == 'i-wz9ipft9swsqvwi40638':
                Name = 'proxy4'
            elif eipline['InstanceId'] == 'i-wz9ipft9swsqvwi4063a':
                Name = 'proxy5'
            elif eipline['InstanceId'] == 'i-wz96rc22e3e8cesooegc':
                Name = 'proxy6'
            elif eipline['InstanceId'] == 'i-wz96rc22e3e8cesooegd':
                Name = 'proxy7'
            elif eipline['InstanceId'] == 'i-wz9dsw8flxbfj81f4i6p':
                Name = 'proxy8'
            elif eipline['InstanceId'] == 'i-wz9dsw8flxbfj81f4i6q':
                Name = 'proxy9'
            else:
                Name = 'proxy'
	    #将别名替换eipinfo的IP地址
            obj[Name] = eipline['IpAddress']
            #将obj放入到neweiplist字典内
            neweiplist.append(obj)
    #调用dingdingtalksend函数将neweiplist字典转换成字符串发给钉钉群
    dingdingtalksend("自动切换完成最新EIP信息如下：
", str(neweiplist))

#实例化并调用main函数
if __name__ == '__main__':
    sys.exit(main())