switch_lb.py
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#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
修改腾讯云七层负载均衡器的权重
@see doc: https://cloud.tencent.com/document/product/214/8978
"""
from qcloud.qcloud_api import QcloudApi
import time, sys, os
from ansible.parsing.dataloader import DataLoader
from ansible.inventory.manager import InventoryManager
"""
作用：切换负载均衡器的流量
依赖： inventory 文件
demo:
lbswitch = LBSwitch(secretId="AKID6dwpKadiQgbDpXDtyNhppIHPO5qPv5GK", secretKey="ACJkH9mg0DBA1PYpf0E7f3g534wBsQaW",
az1_lb_id="lb-dyh6eucn", az2_lb_id="lb-capto5b5", az3_lb_id="lb-capto5b5", az1_innerlb_id="lb-c26tgo5r")
# 全部流量切换到AZ1
ret = lbswitch.all_to_az1()
# 全部流量切换到AZ2
ret = lbswitch.all_to_az2()
"""
class LBSwitch:
def __init__(self, secretId, secretKey, az1_lb_id, az2_lb_id, az3_lb_id, az1_innerlb_id):
self.SecretId = secretId
self.SecretKey = secretKey
self.az1_lb_id = az1_lb_id
self.az2_lb_id = az2_lb_id
self.az3_lb_id = az3_lb_id
self.az1_innerlb_id = az1_innerlb_id
def all_to_az1(self):
"""
所有流量切换到az1
:return:
"""
az1_nginxs = self.get_inventory_ifo("az1", 'java-nginx')
print "get all java nginx: %s for az: %s" % (az1_nginxs, "az1")
az1_nginx_weight = {}
for az1_nginx in az1_nginxs:
az1_nginx_weight[az1_nginx] = 10
# az2 公网流量切换到az1
ret_az2 = self.modify_alb_weight(lb_id=self.az2_lb_id, domain="*.yoho.cn", ip_weight_dict=az1_nginx_weight)
print("switch all incoming request from az2 to az1 result: %s" % ret_az2)
# az1 公网流量、内部流量切换到az1
ret_az1 = self.modify_clb_weight(lb_id=self.az1_lb_id, ip_weight_dict=az1_nginx_weight)
ret_az1_inner = self.modify_alb_weight(lb_id=self.az1_innerlb_id, domain="*.yoho.yohoops.org",
ip_weight_dict=az1_nginx_weight)
print("switch all incoming request from az1 to az1 result: %s inner result: %s" % (ret_az1, ret_az1_inner))
return ret_az1 and ret_az1_inner and ret_az2
def all_to_az2(self):
"""
所有流量切换到AZ2
:return:
"""
az2_nginx = self.get_inventory_ifo("az2", 'java-nginx')
az2_nginx_weight = {}
for nginx in az2_nginx:
az2_nginx_weight[nginx] = 10
# az2 公网流量切换到az2
ret_az2 = self.modify_alb_weight(lb_id=self.az2_lb_id, domain="*.yoho.cn", ip_weight_dict=az2_nginx_weight)
print("switch all incoming request from az2 to az2 result: %s" % ret_az2)
# az1 公网流量、内部流量切换到az2
ret_az1 = self.modify_clb_weight(lb_id=self.az1_lb_id, ip_weight_dict=az2_nginx_weight)
ret_az1_inner = self.modify_alb_weight(lb_id=self.az1_innerlb_id, domain="*.yoho.yohoops.org", ip_weight_dict=az2_nginx_weight)
print("switch all incoming request from az1 to az2 result: %s inner lb:%s" % (ret_az1, ret_az1_inner))
return ret_az1 and ret_az2 and ret_az1_inner
@staticmethod
def get_inventory_ifo(az, group):
"""
get hosts info from ansible inventory file
"""
data_loader = DataLoader()
inventory = InventoryManager(loader=data_loader,
sources=[os.path.join("./inventories", az, 'hosts')])
return inventory.get_groups_dict()[group]
def modify_clb_weight(self, lb_id, ip_weight_dict):
"""
修改传统负载均衡器的权重
@:param lb_id 负载均衡器的ID
@:param ip_weight_dict 需要设置权重的后端IP-权重字典, 格式为 {'ip': weight }
:return: True: 修改成功
"""
# 1.获取传统型负载均衡器的后端列表
# see details at: https://cloud.tencent.com/document/api/214/1259
instance_weight = {} # instance_id --> weight
api = QcloudApi(secretId=self.SecretId, secretKey=self.SecretKey)
lb_info = api.do_query(params={'Action': 'DescribeLoadBalancerBackends', 'loadBalancerId': lb_id}, req_url=QcloudApi.URLS_lb)
for backend in lb_info['backendSet']:
if backend['lanIp'] in ip_weight_dict.keys():
# setup the instance_id --> weight
instance_weight[backend['unInstanceId']] = ip_weight_dict[backend['lanIp']]
else:
instance_weight[backend['unInstanceId']] = 0
# 2.检查至少有一个weight不为0
if len(filter(lambda w: w != 0, instance_weight.values())) == 0:
sys.exit(" instance weight: %s is all zero. please check again!" % instance_weight)
# 3.修改权重： https://cloud.tencent.com/document/api/214/1264
modify_params = {'Action': 'ModifyLoadBalancerBackends', 'loadBalancerId': lb_id}
i = 1
for ins_id, ins_weight in instance_weight.iteritems():
modify_params['backends.%i.instanceId' % i] = ins_id
modify_params['backends.%i.weight' % i] = ins_weight
i = i + 1
api = QcloudApi(secretId=self.SecretId, secretKey=self.SecretKey)
rsp = api.do_query(params=modify_params, req_url=QcloudApi.URLS_lb)
return rsp['code'] == 0
def modify_alb_weight(self, lb_id, domain, ip_weight_dict):
"""
修改应用型负载均衡器上服务器的权重
@:param lb_id: 应用型负载均衡器ID
@:param domain: 应用型负载均衡器的domain
@:param ip_weight_dict: 需要设置权重的dict, 格式为 {'ip': weight }
@return list
"""
# 查询ALB的监听器信息
# see qcloud api details at: https://cloud.tencent.com/document/product/214/8987
instance_weight = {} # instance_id --> weight
instance_port = {} # instance_id --> port
listener_ids = {} # all linsters
api = QcloudApi(secretId=self.SecretId, secretKey=self.SecretKey)
lb_info = api.do_query(params={'Action': 'DescribeForwardLBBackends', 'loadBalancerId': lb_id}, req_url=QcloudApi.URLS_lb)
# listener : [http , https]
for listener in lb_info['data']:
for rule in listener['rules']:
if rule['domain'] == domain: # domain match
listener_ids[listener['listenerId']] = listener['protocolType']
for backend in rule['backends']:
instance_port[backend['unInstanceId']] = backend['port']
if backend['lanIp'] in ip_weight_dict.keys():
# setup the instance_id --> weight
instance_weight[backend['unInstanceId']] = ip_weight_dict[backend['lanIp']]
else:
instance_weight[backend['unInstanceId']] = 0
# 检查至少有一个weight
if len(filter(lambda w: w != 0, instance_weight.values())) == 0:
sys.exit(" instance weight: %s is all zero. please check again!" % instance_weight)
# 修改七层负载均衡器的权重
# see details at: https://cloud.tencent.com/document/product/214/8978
return_code = []
for lis_id in listener_ids.keys():
params = {'Action': 'ModifyForwardSeventhBackends', 'loadBalancerId': lb_id,
'listenerId': lis_id, 'domain': domain}
i = 1
for ins_id, ins_weight in instance_weight.iteritems():
params['backends.%i.instanceId' % i] = ins_id
params['backends.%i.weight' % i] = ins_weight
params['backends.%i.port' % i] = instance_port[ins_id]
i = i + 1
rsp = api.do_query(params, req_url=QcloudApi.URLS_lb)
print(u"response code: %s . success change domain: %s for listener : %s. wait for 10s" % (rsp['code'], domain, listener_ids[lis_id]))
return_code.append(rsp['code'])
time.sleep(10)
return return_code.count(0) == len(return_code)
lbswitch = LBSwitch(secretId="AKID6dwpKadiQgbDpXDtyNhppIHPO5qPv5GK", secretKey="ACJkH9mg0DBA1PYpf0E7f3g534wBsQaW",
az1_lb_id="lb-dyh6eucn", az2_lb_id="lb-capto5b5", az3_lb_id="lb-capto5b5", az1_innerlb_id="lb-c26tgo5r")
#ret = lbswitch.modify_clb_weight(lb_id="lb-e14oxiq3", ip_weight_dict={"10.66.104.15": 10, "10.66.104.13":20})
#ret = lbswitch.modify_alb_weight(lb_id="lb-fodpm611", domain="*.yoho.cn", ip_weight_dict={"10.66.0.2": 10, "10.66.0.3": 10})
#ret = lbswitch.all_to_az1()
ret = lbswitch.all_to_az2()
print ret