add /clb_gateway_scaling_j_count

gateway/clb_gateway_scaling_k_count.py → gateway/clb_gateway_scaling_j_count.py

@@ -4,25 +4,29 @@ import asyncio
 import logging
 import time
 import requests
-import alb_utils
+
+import clb_utils
 import gateway_config
+
 from concurrent.futures import ThreadPoolExecutor
 
+
 health_instances = []
 
-def gateway_health_check(ecs_client, instance_id, max_wait_time=None):
+
+def gateway_health_check(client, instance_id, max_wait_time=None):
     """
     服务健康检查
-    :param ecs_client: 客户端连接
+    :param client: 客户端连接
     :param instance_id: instanceId
     :param max_wait_time: 最长等待时间，单位：s
     :return:
     """
     global health_instances
     start_time = time.time()
-    ip_address = alb_utils.get_ip_address(ecs_client=ecs_client, instance_id=instance_id)
+    ip_address = clb_utils.get_ip_address(client=client, instance_id=instance_id)
     while True:
-        health_check_url = f"http://{ip_address}:9000/healthcheck"
+        health_check_url = f"http://{ip_address}:8080/gatewayapi/test"
         try:
             http_code = requests.get(health_check_url).status_code
         except:
@@ -44,58 +48,59 @@ def gateway_health_check(ecs_client, instance_id, max_wait_time=None):
             time.sleep(10)
 
 
-async def ess_instance(ecs_client, alb_client, ess_count, max_workers, port):
+async def ess_instance(ecs_client, clb_client, ess_count, max_workers):
     """
     扩容机器并运行新服务
     :param ecs_client: 购买机器客户端连接
-    :param alb_client: 修改负载均衡权限
+    :param clb_client: 修改负载均衡权限
     :param ess_count: 扩容数量
     :param max_workers: 线程数
-    :param port: 后端服务器使用的端口
     :return:
     """
     # 1. 购买机器并启动
-    ess_instance_ids = alb_utils.create_multiple_instances(
+    ess_instance_ids = clb_utils.create_multiple_instances(
         amount=ess_count,
-        ecs_client=ecs_client,
+        client=ecs_client,
         **gateway_config.instance_config_j,
     )
     time.sleep(60)
 
     # 2. 发送启动脚本到机器上
-    alb_utils.send_file_to_ecs(ecs_client=ecs_client, instance_id_list=ess_instance_ids, **gateway_config.start_sh)
-    logging.info(f"send start shell file finished, count: {len(ess_instance_ids)} instances: {ess_instance_ids}")
+    clb_utils.send_file_to_ecs(client=ecs_client, instance_id_list=ess_instance_ids, **gateway_config.start_sh)
+    logging.info(f"send start shell file finished, instances: {ess_instance_ids}")
     # 3. 启动服务
     start_sh_param = "latest"
     server_start_sh = os.path.join(gateway_config.start_sh['target_dir'], gateway_config.start_sh['name'])
     server_start_commend = f"sh {server_start_sh} {start_sh_param}"
-    alb_utils.run_command(ecs_client=ecs_client, instance_ids=ess_instance_ids, command=server_start_commend)
+    clb_utils.run_command(client=ecs_client, instance_ids=ess_instance_ids, command=server_start_commend)
     # 4. 异步探活
     global health_instances
     health_instances = []
-    max_wait_time = 360
+    max_wait_time = 180
     loop = asyncio.get_running_loop()
     executor = ThreadPoolExecutor(max_workers=max_workers)
     tasks = [
         loop.run_in_executor(executor, gateway_health_check, *args) for args in
-        [(ecs_client, instance_id, max_wait_time) for instance_id in ess_instance_ids]
+        [(clb_client, instance_id, max_wait_time) for instance_id in ess_instance_ids]
     ]
     await asyncio.wait(tasks)
     logging.info(f"health instances count: {len(health_instances)}, {health_instances}")
-
-    # 5. 挂载流量到ALB
+    # 5. 挂载流量
     if len(health_instances) > 0:
         # 所有机器探活成功
         time.sleep(20)
-        # instance_id_list = []
-        # for instance_id, ip in health_instances:
-        #     instance_id_list.append(instance_id)
-        # #     for server_group_id in gateway_config.server_group_id_list:
+        clb_utils.add_backend_servers_with_slbs(client=clb_client,
+                                            slb_id_list=gateway_config.clb_id_list,
+                                            instances=health_instances)
+        add_weight_list = [(10, 5), (20, 5), (40, 5), (60, 5), (80, 5), (100, 5)]
         health_instance_ids = [instance_id for instance_id, _ in health_instances]
-        alb_utils.add_servers_to_server_group(alb_client, gateway_config.server_group_id_list, health_instance_ids, weight=100, port=port)
+        clb_utils.set_instance_weight_process_with_slbs(client=clb_client,
+                                                    slb_id_list=gateway_config.clb_id_list,
+                                                    instance_id_list=health_instance_ids,
+                                                    weight_list=add_weight_list)
         logging.info(f"ess count: {ess_count}, "
                      f"create count: {len(ess_instance_ids)}, "
-                     f"finished count: {len(health_instances)}")
+                     f"finished count: {len(health_instance_ids)}")
     else:
         logging.info(f"ess count: {ess_count}, "
                      f"create count: {len(ess_instance_ids)}, "
@@ -103,25 +108,21 @@ async def ess_instance(ecs_client, alb_client, ess_count, max_workers, port):
         sys.exit()
 
 
-
 def main():
     try:
-        ecs_client = alb_utils.connect_client(access_key_id=gateway_config.ecs_client_params['access_key_id'],
-                                          access_key_secret=gateway_config.ecs_client_params['access_key_secret'],
-                                          region_id=gateway_config.ecs_client_params['region_id'])
-        alb_client = alb_utils.connect_alb_client(
-            access_key_id=gateway_config.alb_client_params['access_key_id'],
-            access_key_secret=gateway_config.alb_client_params['access_key_secret'],
-            endpoint=gateway_config.alb_client_params['endpoint']
-        )
+        clb_client = clb_utils.connect_client(access_key_id=gateway_config.clb_client_params['access_key_id'],
+                                          access_key_secret=gateway_config.clb_client_params['access_key_secret'],
+                                          region_id=gateway_config.clb_client_params['region_id'])
+        ecs_client = clb_utils.connect_client(access_key_id=gateway_config.ecs_client_params['access_key_id'],
+                                             access_key_secret=gateway_config.ecs_client_params['access_key_secret'],
+                                             region_id=gateway_config.ecs_client_params['region_id'])
         # 获取批量创建ECS实例的数量
         ess_instance_count = int(sys.argv[1])
         # 扩容机器并启动服务
         logging.info(f"ess instances start ...")
         logging.info(f"ess instance count: {ess_instance_count}")
-        asyncio.run(ess_instance(ecs_client=ecs_client,
-                                 alb_client=alb_client,
-                                 ess_count=ess_instance_count, max_workers=2, port=gateway_config.port))
+        asyncio.run(ess_instance(ecs_client=ecs_client, clb_client=clb_client,
+                                 ess_count=ess_instance_count, max_workers=2))
         logging.info(f"ess instances end!")
     except Exception as e:
         logging.error(e)

gateway/clb_utils.py

@@ -0,0 +1,524 @@
+import logging
+import json
+import sys
+import time
+import requests
+import asyncio
+
+from aliyunsdkcore.client import AcsClient
+from aliyunsdkslb.request.v20140515.AddBackendServersRequest import AddBackendServersRequest
+from aliyunsdkslb.request.v20140515.RemoveBackendServersRequest import RemoveBackendServersRequest
+from aliyunsdkecs.request.v20140526.RunInstancesRequest import RunInstancesRequest
+from aliyunsdkecs.request.v20140526.DescribeInstancesRequest import DescribeInstancesRequest
+from aliyunsdkecs.request.v20140526.DescribeNetworkInterfacesRequest import DescribeNetworkInterfacesRequest
+from aliyunsdkslb.request.v20140515.DescribeLoadBalancerAttributeRequest import DescribeLoadBalancerAttributeRequest
+from aliyunsdkecs.request.v20140526.RunCommandRequest import RunCommandRequest
+from aliyunsdkecs.request.v20140526.SendFileRequest import SendFileRequest
+from aliyunsdkecs.request.v20140526.StopInstancesRequest import StopInstancesRequest
+from aliyunsdkecs.request.v20140526.DeleteInstancesRequest import DeleteInstancesRequest
+from aliyunsdkecs.request.v20140526.DescribeInstanceStatusRequest import DescribeInstanceStatusRequest
+from aliyunsdkcore.request import CommonRequest
+
+logging.basicConfig(level=logging.INFO,
+                    format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
+                    datefmt='%a, %d %b %Y %H:%M:%S')
+
+
+def send_msg_to_feishu(webhook, key_word, msg_text):
+    """发送消息到飞书"""
+    headers = {'Content-Type': 'application/json'}
+    payload_message = {
+        "msg_type": "text",
+        "content": {
+            "text": '{}: {}'.format(key_word, msg_text)
+        }
+    }
+    response = requests.request('POST', url=webhook, headers=headers, data=json.dumps(payload_message))
+    logging.info(response.text)
+
+
+def connect_client(access_key_id, access_key_secret, region_id):
+    """
+    初始化账号，连接客户端
+    :param access_key_id: access key Id, type-string
+    :param access_key_secret: access key secret, type-string
+    :param region_id: region_id
+    :return: clt
+    """
+    try:
+        clt = AcsClient(ak=access_key_id, secret=access_key_secret, region_id=region_id)
+        return clt
+    except Exception as e:
+        # 失败，记录报错信息，发送通知，停止并退出
+        logging.error(e)
+        sys.exit()
+
+
+def build_create_instances_request(image_id, vswitch_id, security_group_id, zone_id, instance_type, instance_name,
+                                   disk_size, disk_category, key_pair_name, tags):
+    """
+    购买服务器参数配置
+    :param image_id: 使用的镜像信息 type-string
+    :param vswitch_id: 选择的交换机 type-string
+    :param security_group_id: 当前vpc类型的安全组 type-string
+    :param zone_id: 服务器所在区域 type-string
+    :param instance_type: 实例规格 type-string
+    :param instance_name: 实例命名 type-string
+    :param disk_size: 磁盘大小，单位：G，type-string
+    :param disk_category: 磁盘类型 type-string
+    :param key_pair_name: 密钥对名称 type-string
+    :param tags: 标签 type-list, eg: [{"Key": "ecs", "Value": "rov-server.prod"}, ...]
+    :return: request
+    """
+    request = RunInstancesRequest()
+    request.set_ImageId(image_id)
+    request.set_VSwitchId(vswitch_id)
+    request.set_SecurityGroupId(security_group_id)
+    request.set_ZoneId(zone_id)
+    request.set_InstanceType(instance_type)
+    request.set_InstanceName(instance_name)
+    request.set_SystemDiskSize(disk_size)
+    request.set_SystemDiskCategory(disk_category)
+    request.set_KeyPairName(key_pair_name)
+    request.set_Tags(tags)
+    return request
+
+
+def send_request(client, request):
+    """
+    发送API请求
+    :param client: 客户端连接
+    :param request: 请求配置
+    :return: response
+    """
+    request.set_accept_format('json')
+    try:
+        response = client.do_action_with_exception(request)
+        response = json.loads(response)
+        # logging.info(response)
+        return response
+    except Exception as e:
+        # 失败，记录报错信息，发送通知，停止并退出
+        logging.error(e)
+        sys.exit()
+
+
+def send_req(client, request):
+    """
+    发送API请求
+    :param client: 客户端连接
+    :param request: 请求配置
+    :return: response
+    """
+    request.set_accept_format('json')
+    response = client.do_action_with_exception(request)
+    #print(response)
+    response = json.loads(response)
+    print(response)
+        # logging.info(response)
+    print(response.get('Code'))
+    return response
+    #except Exception as e:
+        # 失败，记录报错信息，发送通知，停止并退出
+    #logging.error(e)
+    #sys.exit()
+
+def check_instance_running(client, instance_ids):
+    """
+    检查服务器运行状态
+    :param client: 客户端连接
+    :param instance_ids: 实例id列表, type-list
+    :return: running_count，Status为Running的实例数
+    """
+    try:
+        request = DescribeInstancesRequest()
+        request.set_InstanceIds(json.dumps(instance_ids))
+        request.set_PageSize(100)
+        response = send_request(client=client, request=request)
+        if response.get('Code') is None:
+            instances_list = response.get('Instances').get('Instance')
+            running_count = 0
+            running_instances = []
+            for instance_detail in instances_list:
+                if instance_detail.get('Status') == "Running":
+                    running_count += 1
+                    running_instances.append(instance_detail.get('InstanceId'))
+            return running_count, running_instances
+        else:
+            # 失败，记录报错信息，发送通知，停止并退出
+            logging.error(response)
+            sys.exit()
+    except Exception as e:
+        # 失败，记录报错信息，发送通知，停止并退出
+        logging.error(e)
+        sys.exit()
+
+
+def create_multiple_instances(amount, client,
+                              image_id, vswitch_id, security_group_id, zone_id, instance_type, instance_name,
+                              disk_size, disk_category, key_pair_name, tags):
+    """
+    创建多个ECS实例
+    :param amount: 创建实例数 type-int 取值范围：[1, 100]
+    :param client: 购买机器客户端连接
+    :param image_id: 使用的镜像信息 type-string
+    :param vswitch_id: 选择的交换机 type-string
+    :param security_group_id: 当前vpc类型的安全组 type-string
+    :param zone_id: 服务器所在区域 type-string
+    :param instance_type: 实例规格 type-string
+    :param instance_name: 实例命名 type-string
+    :param disk_size: 磁盘大小，单位：G，type-string
+    :param disk_category: 磁盘类型 type-string
+    :param key_pair_name: 密钥对名称 type-string
+    :param tags: 标签 type-list, eg: [{"Key": "ecs", "Value": "rov-server.prod"}, ...]
+    :return:
+    """
+    logging.info(f"create instances start, request amount: {amount}.")
+    # 1. 连接客户端
+    # create_instances_clt = connect_client(
+    #     access_key_id=access_key_id, access_key_secret=access_key_secret, region_id=region_id
+    # )
+    # 2. 请求参数配置
+    request = build_create_instances_request(
+        image_id=image_id, vswitch_id=vswitch_id, security_group_id=security_group_id, zone_id=zone_id,
+        instance_type=instance_type, instance_name=instance_name, disk_size=disk_size, disk_category=disk_category,
+        key_pair_name=key_pair_name, tags=tags
+    )
+    request.set_Amount(amount)
+    # 3. 发送API请求，购买机器并启动
+    response = send_request(client=client, request=request)
+    if response.get('Code') is None:
+        instance_ids = response.get('InstanceIdSets').get('InstanceIdSet')
+        logging.info(f"success amount: {len(instance_ids)}, instance ids: {instance_ids}.")
+        # 获取机器运行状态
+        running_amount = 0
+        while running_amount < amount:
+            time.sleep(10)
+            running_amount, running_instances = check_instance_running(client=client, instance_ids=instance_ids)
+            logging.info(f"running amount: {running_amount}, running instances: {running_instances}.")
+        return instance_ids
+    else:
+        # 失败，记录报错信息，发送通知，停止并退出
+        logging.error(response)
+        sys.exit()
+
+
+def run_command(client, instance_ids, command):
+    """
+    批量执行命令
+    :param client: 客户端连接
+    :param instance_ids: 实例id列表, type-list, 最多能指定50台ECS实例ID
+    :param command: 命令 type-string
+    :return:
+    """
+    for i in range(len(instance_ids) // 50 + 1):
+        instance_id_list = instance_ids[i * 50:(i + 1) * 50]
+        if len(instance_id_list) == 0:
+            return
+        request = RunCommandRequest()
+        request.set_accept_format('json')
+        request.set_Type("RunShellScript")
+        request.set_CommandContent(command)
+        request.set_InstanceIds(instance_id_list)
+        response = send_request(client=client, request=request)
+        logging.info(response)
+
+# def run_per_command(client, instance, command):
+#     """
+#     批量执行命令
+#     :param client: 客户端连接
+#     :param instance_ids: 实例id列表, type-list, 最多能指定50台ECS实例ID
+#     :param command: 命令 type-string
+#     :return:
+#     """
+#     #for i in range(len(instance_ids) // 50 + 1)
+#     request = RunCommandRequest()
+#     request.set_accept_format('json')
+#     request.set_Type("RunShellScript")
+#     request.set_CommandContent(command)
+#     request.set_InstanceIds([instance])
+#     response = send_req(client=client, request=request)
+#     logging.info(response)
+#     return response
+
+
+def get_instance_ids(client, slb_id):
+    """
+    获取slb下所有服务器instanceId
+    :param client: 客户端连接
+    :param slb_id: 负载均衡id type-string
+    :return: instance_ids type-list
+    """
+    request = DescribeLoadBalancerAttributeRequest()
+    request.set_accept_format('json')
+    request.set_LoadBalancerId(slb_id)
+    response = send_request(client=client, request=request)
+    instance_ids = [instance["ServerId"] for instance in response["BackendServers"]["BackendServer"]]
+    return instance_ids
+
+
+def get_ip_address(client, instance_id):
+    """
+    获取实例IP地址
+    :param client: 客户端连接
+    :param instance_id: 实例id, type-string
+    :return: ip_address, type-string
+    """
+    request = DescribeNetworkInterfacesRequest()
+    request.set_accept_format('json')
+    request.set_InstanceId(instance_id)
+    response = send_request(client=client, request=request)
+    ip_address = response['NetworkInterfaceSets']['NetworkInterfaceSet'][0]['PrivateIpAddress']
+    return ip_address
+
+
+def set_weight_for_instances(client, slb_id, instance_id_list, weight):
+    """
+    同时设置多台服务器的slb权重，权重一样
+    :param client: 客户端连接
+    :param slb_id: slb_id
+    :param instance_id_list: 服务器id list
+    :param weight: 权重值
+    :return: None
+    """
+    for i in range(len(instance_id_list) // 20 + 1):
+        instances_list = instance_id_list[i * 20:(i + 1) * 20]
+        if len(instances_list) == 0:
+            return
+        BackendServers = [{"ServerId": instance_id, "Weight": weight} for instance_id in instances_list]
+        request = CommonRequest()
+        request.set_accept_format('json')
+        request.set_domain('slb.aliyuncs.com')
+        request.set_version('2014-05-15')
+        request.set_method('POST')
+        request.set_action_name('SetBackendServers')
+        request.add_query_param('BackendServers', BackendServers)
+        request.add_query_param('LoadBalancerId', slb_id)
+        response = send_request(client=client, request=request)
+
+
+def send_file_to_ecs(client, instance_id_list, target_dir, name, content):
+    """
+    发送文件到ecs
+    :param client:
+    :param instance_id_list: 最多能指定50台ECS实例ID
+    :param target_dir: 文件存放目录 type-string
+    :param name: 文件名 type-string
+    :param content: 文件内容 type-string
+    :return:
+    """
+    for i in range(len(instance_id_list) // 50 + 1):
+        instance_ids = instance_id_list[i * 50:(i + 1) * 50]
+        if len(instance_ids) == 0:
+            return
+        request = SendFileRequest()
+        request.set_Content(content)
+        request.set_TargetDir(target_dir)
+        request.set_Name(name)
+        request.set_Overwrite(True)
+        request.set_InstanceIds(instance_ids)
+        response = send_request(client=client, request=request)
+
+
+def stop_instances(client, instance_ids, force_stop=False):
+    """
+    停止实例
+    :param client:
+    :param instance_ids: 实例ID, type-list
+    :param force_stop: 是否强制关机, True-强制关机, False-正常关机, type-bool
+    :return:
+    """
+    request = StopInstancesRequest()
+    request.set_InstanceIds(instance_ids)
+    request.set_ForceStop(force_stop)
+    response = send_request(client=client, request=request)
+    return response
+
+
+def release_instances(client, instance_ids, force=False):
+    """
+    释放实例
+    :param client:
+    :param instance_ids: instance_id, type-list
+    :param force: 是否强制释放, True-强制释放, False-正常释放, type-bool
+    :return:
+    """
+    request = DeleteInstancesRequest()
+    request.set_InstanceIds(instance_ids)
+    request.set_Force(force)
+    response = send_request(client=client, request=request)
+    return response
+
+
+def get_instances_status(client, instance_ids):
+    """
+    获取实例运行状态
+    :param client:
+    :param instance_ids: instance_id, type-liist
+    :return:
+    """
+    request = DescribeInstanceStatusRequest()
+    request.set_InstanceIds(instance_ids)
+    request.set_PageSize(50)
+    response = send_request(client=client, request=request)
+    return response
+
+
+def set_instance_weight_process(client, slb_id, instance_id_list, weight_list):
+    """
+    修改服务器的权重值
+    :param client: slb客户端连接
+    :param slb_id: slb id
+    :param instance_id_list: instance id list
+    :param weight_list: 权重修改列表 type-list [(weight, sleep_time), ...]
+    :return:
+    """
+    for weight, sleep_time in weight_list:
+        logging.info(f"weight = {weight}")
+        flag = True
+        while flag:
+            try:
+                set_weight_for_instances(client=client, slb_id=slb_id, instance_id_list=instance_id_list, weight=weight)
+                time.sleep(sleep_time)
+                flag = False
+            except Exception as e:
+                time.sleep(10)
+                continue
+
+
+def add_backend_servers(client, slb_id, instances):
+    """
+    服务器挂载到负载均衡(必须是状态为运行中的后端服务器才可以加入负载均衡实例，每次调用最多可添加20个后端服务器)
+    :param client:
+    :param slb_id:
+    :param instances: 实例列表 [(instance_id, ip), ...]
+    :return:
+    """
+    try:
+        for i in range(len(instances) // 20 + 1):
+            instances_list = instances[i * 20:(i + 1) * 20]
+            if len(instances_list) == 0:
+                return
+            request = AddBackendServersRequest()
+            request.set_accept_format('json')
+            request.set_LoadBalancerId(slb_id)
+            backend_servers = [
+                {"ServerId": instance_id, "Weight": "0", "Type": "ecs", "ServerIp": ip_address}
+                for instance_id, ip_address in instances_list]
+            request.set_BackendServers(backend_servers)
+            response = client.do_action_with_exception(request)
+            return response
+    except Exception as e:
+        logging.error(e)
+        sys.exit()
+
+
+def remove_backend_servers(client, slb_id, instances):
+    """
+    服务器从负载均衡移除(一次调用最多可以移除20个后端服务器)
+    :param client:
+    :param slb_id:
+    :param instances: 实例列表 [instance_id, ...]
+    :return:
+    """
+    try:
+        for i in range(len(instances) // 20 + 1):
+            instances_list = instances[i * 20:(i + 1) * 20]
+            if len(instances_list) == 0:
+                return
+            request = RemoveBackendServersRequest()
+            request.set_accept_format('json')
+            request.set_LoadBalancerId(slb_id)
+            backend_servers = [
+                {"ServerId": instance_id, "Weight": "0", "Type": "ecs"}
+                for instance_id in instances_list]
+            request.set_BackendServers(backend_servers)
+            response = client.do_action_with_exception(request)
+            return response
+    except Exception as e:
+        logging.error(e)
+        sys.exit()
+
+
+def set_instance_weight_process_with_slbs(client, slb_id_list, instance_id_list, weight_list):
+    """
+    修改服务器的权重值
+    :param client: slb客户端连接
+    :param slb_id_list: slb id list
+    :param instance_id_list: instance id list
+    :param weight_list: 权重修改列表 type-list [(weight, sleep_time), ...]
+    :return:
+    """
+    for weight, sleep_time in weight_list:
+        logging.info(f"修改权重中: weight = {weight}")
+        for slb_id in slb_id_list:
+            flag = True
+            while flag:
+                try:
+                    set_weight_for_instances(client=client, slb_id=slb_id, instance_id_list=instance_id_list, weight=weight)
+                    logging.info(f"slb: {slb_id} finished！")
+                    flag = False
+                except Exception as e:
+                    time.sleep(10)
+                    continue
+        time.sleep(sleep_time)
+
+
+def add_backend_servers_with_slbs(client, slb_id_list, instances):
+    """
+    服务器挂载到负载均衡(必须是状态为运行中的后端服务器才可以加入负载均衡实例，每次调用最多可添加20个后端服务器)
+    :param client:
+    :param slb_id_list:
+    :param instances: 实例列表 [(instance_id, ip), ...]
+    :return:
+    """
+    try:
+        for i in range(len(instances)//20 + 1):
+            instances_list = instances[i*20:(i+1)*20]
+            if len(instances_list) == 0:
+                return
+            for slb_id in slb_id_list:
+                request = AddBackendServersRequest()
+                request.set_accept_format('json')
+                request.set_LoadBalancerId(slb_id)
+                backend_servers = [
+                    {"ServerId": instance_id, "Weight": "0", "Type": "ecs", "ServerIp": ip_address}
+                    for instance_id, ip_address in instances_list]
+                request.set_BackendServers(backend_servers)
+                response = client.do_action_with_exception(request)
+                logging.info(f"slb: {slb_id} add backend servers finished!")
+            logging.info(f"i: {i}, count: {len(instances_list)}, instances: {instances_list} "
+                         f"add backend servers finished!")
+    except Exception as e:
+        logging.error(e)
+        sys.exit()
+
+
+def remove_backend_servers_with_slbs(client, slb_id_list, instances):
+    """
+    服务器从负载均衡移除(一次调用最多可以移除20个后端服务器)
+    :param client:
+    :param slb_id_list:
+    :param instances: 实例列表 [instance_id, ...]
+    :return:
+    """
+    try:
+        for i in range(len(instances)//20 + 1):
+            instances_list = instances[i*20:(i+1)*20]
+            if len(instances_list) == 0:
+                return
+            for slb_id in slb_id_list:
+                request = RemoveBackendServersRequest()
+                request.set_accept_format('json')
+                request.set_LoadBalancerId(slb_id)
+                backend_servers = [
+                    {"ServerId": instance_id, "Weight": "0", "Type": "ecs"}
+                    for instance_id in instances_list]
+                request.set_BackendServers(backend_servers)
+                response = client.do_action_with_exception(request)
+                logging.info(f"slb: {slb_id} remove backend servers finished!")
+            logging.info(f"i: {i}, count: {len(instances_list)}, instances: {instances_list} "
+                         f"remove backend servers finished!")
+    except Exception as e:
+        logging.error(e)
+        sys.exit()