前置条件

安装sdk

安装阿里云sdk核心库

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pip install aliyun-python-sdk-core

安装阿里云负载均衡sdk

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pip install aliyun-python-sdk-slb

ak申请

子账号权限设置为该负载均衡的管理权限。

脚本

切换到应急环境

原理：把后端生产服务器权重改为0，应急服务器的权重改为100。

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#/usr/bin/python
#coding=utf-8
from aliyunsdkcore import client
from aliyunsdkslb.request.v20140515 import SetBackendServersRequest
import os


AccessKeyId = ''  # AccessKeyID
AccessKeySecret = ''  # AccessKeySecret
Endpoint = ''  # 地区，例如cn-hangzhou

client = client.AcsClient(AccessKeyId, AccessKeySecret, Endpoint)
# ECS实例id
ecs_a = ""  # ECS实例id，应急服务器
ecs_b = ""  # ECS实例id，正常服务器
ecs_c = ""  # ECS实例id，正常服务器

# SLB示例id
slb_id = ""

# 把备用机权重设置成100，其余的权重设置为0
req_parm1 = "BackendServers"
req_parm2 = [{"ServerId": ecs_a, "Weight": 100}, {
    "ServerId": ecs_b, "Weight": 0}, {"ServerId": ecs_c, "Weight": 0}]

for i in range(len(req_parm2)):
    request = SetBackendServersRequest.SetBackendServersRequest()
    request.set_accept_format('json')
    request.add_query_param('LoadBalancerId', slb_id)
    request.add_query_param(req_parm1, req_parm2) # 设置权重
    response = client.do_action_with_exception(request)
print(response)  # 输出结果

切换到正常生产环境

原理：把后端生产服务器权重改为100，应急服务器的权重改为0。

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#/usr/bin/python
#coding=utf-8
from aliyunsdkcore import client
from aliyunsdkslb.request.v20140515 import SetBackendServersRequest
import os


AccessKeyId = ''  # AccessKeyID
AccessKeySecret = ''  # AccessKeySecret
Endpoint = ''  # 地区，例如cn-hangzhou

client = client.AcsClient(AccessKeyId, AccessKeySecret, Endpoint)
# ECS实例id
ecs_a = ""  # ECS实例id，应急服务器
ecs_b = ""  # ECS实例id，正常服务器
ecs_C = ""  # ECS实例id，正常服务器

# SLB示例id
slb_id = ""

# 把备用机权重设置成100，其余的权重设置为0
req_parm1 = "BackendServers"
req_parm2 = [{"ServerId": ecs_a, "Weight": 0}, {
    "ServerId": ecs_b, "Weight": 100}, {"ServerId": ecs_C, "Weight": 100}]

for i in range(len(req_parm2)):
    request = SetBackendServersRequest.SetBackendServersRequest()
    request.set_accept_format('json')
    request.add_query_param('LoadBalancerId', slb_id)
    request.add_query_param(req_parm1, req_parm2) # 设置权重
    response = client.do_action_with_exception(request)
print(response)  # 输出结果