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+yoho.lb.switch
+=========
+
+切换load balancer （负载均衡器，简称lb）
+
+
+Requirements
+------------
+
+Any pre-requisites that may not be covered by Ansible itself or the role should be mentioned here. For instance, if the role uses the EC2 module, it may be a good idea to mention in this section that the boto package is required.
+
+Role Variables
+--------------
+
+A description of the settable variables for this role should go here, including any variables that are in defaults/main.yml, vars/main.yml, and any variables that can/should be set via parameters to the role. Any variables that are read from other roles and/or the global scope (ie. hostvars, group vars, etc.) should be mentioned here as well.
+
+Dependencies
+------------
+
+A list of other roles hosted on Galaxy should go here, plus any details in regards to parameters that may need to be set for other roles, or variables that are used from other roles.
+
+Example Playbook
+----------------
+
+Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:
+
+    - hosts: servers
+      roles:
+         - { role: username.rolename, x: 42 }
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+An optional section for the role authors to include contact information, or a website (HTML is not allowed).

+---
+# defaults file for yoho.lb.switch
\ No newline at end of file

+---
+# handlers file for yoho.lb.switch
\ No newline at end of file

+galaxy_info:
+  author: your name
+  description: your description
+  company: your company (optional)
+
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+
+  # Some suggested licenses:
+  # - BSD (default)
+  # - MIT
+  # - GPLv2
+  # - GPLv3
+  # - Apache
+  # - CC-BY
+  license: license (GPLv2, CC-BY, etc)
+
+  min_ansible_version: 1.2
+
+  # If this a Container Enabled role, provide the minimum Ansible Container version.
+  # min_ansible_container_version:
+
+  # Optionally specify the branch Galaxy will use when accessing the GitHub
+  # repo for this role. During role install, if no tags are available,
+  # Galaxy will use this branch. During import Galaxy will access files on
+  # this branch. If Travis integration is configured, only notifications for this
+  # branch will be accepted. Otherwise, in all cases, the repo's default branch
+  # (usually master) will be used.
+  #github_branch:
+
+  #
+  # platforms is a list of platforms, and each platform has a name and a list of versions.
+  #
+  # platforms:
+  # - name: Fedora
+  #   versions:
+  #   - all
+  #   - 25
+  # - name: SomePlatform
+  #   versions:
+  #   - all
+  #   - 1.0
+  #   - 7
+  #   - 99.99
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.
\ No newline at end of file

+---
+# tasks file for yoho.lb.switch
\ No newline at end of file

+localhost
+

+---
+- hosts: localhost
+  remote_user: root
+  roles:
+    - yoho.lb.switch
\ No newline at end of file

+---
+# vars file for yoho.lb.switch
\ No newline at end of file

@@ -7,6 +7,7 @@ import base64
 import hashlib
 import time
 import requests
+import  json
 
 
 class QcloudApi:
@@ -45,7 +46,8 @@ class QcloudApi:
         sign = self.signature(params, req_url)
         params['Signature'] = sign
         response_dict = requests.post("https://" + req_url, data=params).json()
-        print("Query qcloud api success. params: %s, result: %s" % (params, response_dict))
+        print("Query qcloud api success. params:\n %s \n" % (params))
+        print json.dumps(response_dict, indent=4, sort_keys=True)
         return response_dict
 
     @staticmethod

+#!/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
+
+def modify_alb_weight(SecretId, SecretKey, 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
+    """
+
+    instance_weight = {}  # instance_id --> weight
+    instance_port = {}   # instance_id --> port
+    listener_ids = []   # all linsters
+
+    api = QcloudApi(secretId=SecretId, secretKey=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.append(listener['listenerId'])
+                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
+    normal = False
+    for v in instance_weight.values():
+        if v != 0:
+            normal = True
+
+    if not normal:
+        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： https://cloud.tencent.com/document/product/214/8978
+    for lis_id in listener_ids:
+        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 lis_id : %s. wait for 10s" % (rsp['code'], domain, lis_id))
+        time.sleep(10)
+
+
+
+
+
+
+
+
+modify_alb_weight('AKID6dwpKadiQgbDpXDtyNhppIHPO5qPv5GK', 'ACJkH9mg0DBA1PYpf0E7f3g534wBsQaW', lb_id='lb-990aeqw1', domain='*.yoho.cn', ip_weight_dict={'10.66.202.5': 10, '10.66.202.12':10})