update readme

-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
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----
-# handlers file for yoho.lb.switch
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-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.
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----
-# tasks file for yoho.lb.switch
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-localhost
-

----
-- hosts: localhost
-  remote_user: root
-  roles:
-    - yoho.lb.switch
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----
-# vars file for yoho.lb.switch
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@@ -42,9 +42,27 @@ yoho.switch
 
 副可用区出现故障的场景，细分如下2个场景：
 
- - 副可用区所在的外部负载均衡器正常:  在副可用区所在的负载均衡器上将流量切换到主可用区（AZ1）
+ - 副可用区所在的外部负载均衡器正常:  LB Switch To AZ1 (AZ2流量从负载均衡器上切换到AZ1）
 
- - 副可用区所在的外部负载均衡器异常： 切换问询服务器，将APP的流量引导到主可用区
+ - 副可用区所在的外部负载均衡器异常： ASK Switch To AZ1(问询服务器上将流量切换到AZ1）
+
+
+LB Switch to AZ1
+----------------------
+
+>AZ2 外部负载均衡器(`lb-ivt5h95t`, `123.206.2.50`)上  `*.yoho.cn` 切换到AZ1
+>
+>AZ1 外部负载均衡器（`lb-09g87u8f`, `123.206.1.98`) 切换到AZ1
+
+
+
+ASK Switch To AZ1
+----------------------
+
+> `curl -H "Host: dnsresolver.yohoops.org" "http://10.66.4.23/switchCloud?cloudType=1"`
+>
+> `curl -H "Host: dnsresolver.yohoops.org" "http://10.66.4.15/switchCloud?cloudType=1"`
+>
 
 #### 1.2  数据库切换 + 流量切换到副可用区（AZ2）
 

@@ -53,11 +53,11 @@ class LBSwitch:
             ret_az2 = self.modify_alb_weight(lb_id=self.az2_lb_id, domain="*.yoho.cn", ip_weight_dict=ip_weight_dict)
             print("switch all incoming request from az2 to az1 result: %s" % ret_az2)
 
-            # az
+            # az1 公网流量切换到az1
             ret_az1 = self.modify_clb_weight(lb_id=self.az1_lb_id, ip_weight_dict=ip_weight_dict)
             print("switch all incoming request from az1 to az1 result: %s" % ret_az1)
 
-            return ret_az1 & ret_az2
+            return ret_az1 and ret_az2
 
 
 
@@ -137,7 +137,7 @@ class LBSwitch:
             # 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
+            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)
@@ -146,7 +146,7 @@ class LBSwitch:
             for listener in lb_info['data']:
                 for rule in listener['rules']:
                     if rule['domain'] == domain:  # domain match
-                        listener_ids.append(listener['listenerId'])
+                        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():
@@ -162,7 +162,7 @@ class LBSwitch:
             # 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:
+            for lis_id in listener_ids.keys():
                 params = {'Action': 'ModifyForwardSeventhBackends', 'loadBalancerId': lb_id,
                           'listenerId': lis_id, 'domain': domain}
                 i = 1
@@ -173,7 +173,7 @@ class LBSwitch:
                     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))
+                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)
@@ -183,7 +183,7 @@ lbswitch = LBSwitch(secretId="AKID6dwpKadiQgbDpXDtyNhppIHPO5qPv5GK", secretKey="
                     az1_lb_id="lb-e14oxiq3", az2_lb_id="lb-e14oxiq3", az3_lb_id="lb-e14oxiq3")
 
 #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={"10.66.104.15": 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})
 
 print ret