CreateMasterSlaveServerGroup - Classic Load Balancer| Alibaba Cloud Documentation Center

Debugging

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Request parameter


Parameter	Type	Required	Example	Description
Action	String	Yes	CreateMasterSlaveServerGroup	The operation that you want to perform. Set the value to CreateMasterSlaveServerGroup.
LoadBalancerId	String	Yes	lb-bp1hv944r69al4j******	The ID of the Classic Load Balancer (CLB) instance.
MasterSlaveBackendServers	String	Yes	[{ "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs", "Port":"82","ServerType":"Master","Description":"test-112" }, { "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs", "Port":"84","ServerType":"Slave","Description":"test-112" }]	The list of backend servers in the primary/secondary server group. The value of this parameter must be a STRING list in the JSON format. You can specify up to 20 elements in each request. ServerId: This parameter is required. Specify the ID of the backend server. This parameter must be of the STRING type. Port: This parameter is required. Specify the port that is used by the backend server. This parameter must be of the INTEGER type. Valid values: 1 to 65535. Weight: This parameter is required. Specify the weight of the backend server. This parameter must be of the INTEGER type. Valid values: 0 to 100. Description: This parameter is optional. Specify the description of the backend server. This parameter must be of the STRING type. The description must be 1 to 80 characters in length, and can contain letters, digits, hyphens (-), forward slashes (/), periods (.),and underscores (_). ServerType: Specify the type of the backend server. This parameter must be of the STRING type. Valid values: Master: primary server Slave: secondary server Type: Specify the type of backend server. This parameter must be of the STRING type. Valid values: ecs: an ECS instance eni: an elastic network interface (ENI) ServerIp: the IP address of the ECS instance or ENI A primary/secondary server group can contain at most two backend servers. If you do not set this parameter, an empty primary/secondary server group is created. Examples: ECS: `[{ "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs", "Port":"82","ServerType":"Master","Description":"test-112" }, { "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs", "Port":"84","ServerType":"Slave","Description":"test-112" }]` ENI: `[{ "ServerId": "eni-xxxxxxxxx", "Weight": "100", "Type": "eni", "Port":"80","ServerType":"Master","Description":"test-112" }, { "ServerId": "eni-xxxxxxxxx", "Weight": "100", "Type": "eni", "ServerIp": "192.168..", "Port":"80","ServerType":"Slave","Description":"test-112" }]` ENI with multiple IP addresses: `[{ "ServerId": "eni-xxxxxxxxx", "Weight": "100", "Type": "eni","ServerIp": "192.168..", "Port":"80","ServerType":"Master","Description":"test-112" }, { "ServerId": "eni-xxxxxxxxx", "Weight": "100", "Type": "eni","ServerIp": "192.168..", "Port":"80","ServerType":"Slave","Description":"test-112" }]`
RegionId	String	Yes	cn-hangzhou	The ID of the region where the CLB instance is deployed.
MasterSlaveServerGroupName	String	No	Group1	The name of the primary/secondary server group.

Response parameters


Parameter	Type	Example	Description
MasterSlaveServerGroupId	String	rsp-bp19au4******	The ID of the primary/secondary server group.
MasterSlaveBackendServers	Array of MasterSlaveBackendServer		The list of backend servers in the primary/secondary server group.
MasterSlaveBackendServer
ServerId	String	i-bp1fq61enf4loa5i****	The ID of the ECS instance or ENI that is added.
Port	Integer	82	The port number used by the backend server.
Weight	Integer	100	The weight of the backend server.
ServerType	String	Master	The type of the backend server. Valid values: Master and Slave.
Description	String	test-112	The description of the primary/secondary server group.
Type	String	ecs	The type of the backend server. Valid values: ecs: an ECS instance eni: an ENI
RequestId	String	7CA4DB76-4D32-523B-822E-5C9494613D46	The ID of the request.

Examples

Sample requests

http(s)://[Endpoint]/?Action=CreateMasterSlaveServerGroup
&LoadBalancerId=lb-bp1hv944r69al4j******
&MasterSlaveBackendServers=[{ "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs",  "Port":"82","ServerType":"Master","Description":"test-112" },  { "ServerId": "i-xxxxxxxxx", "Weight": "100", "Type": "ecs",  "Port":"84","ServerType":"Slave","Description":"test-112" }]
&RegionId=cn-hangzhou
&<Common request parameters>

Sample success responses

XML format

<CreateMasterSlaveServerGroupResponse>
  <RequestId>7CA4DB76-4D32-523B-822E-5C9494613D46</RequestId>
  <MasterSlaveServerGroupId>rsp-bp19au4******</MasterSlaveServerGroupId>
  <MasterSlaveBackendServers>
        <MasterSlaveBackendServer>
              <ServerType>Master</ServerType>
              <Type>ecs</Type>
              <ServerId>i-bp1fq61enf4loa5i****</ServerId>
              <Description>test-112</Description>
              <Port>82</Port>
              <Weight>100</Weight>
        </MasterSlaveBackendServer>
        <MasterSlaveBackendServer>
              <ServerType>Slave</ServerType>
              <Type>ecs</Type>
              <ServerId>i-bp10ephck4n5uehd****</ServerId>
              <Description>test-112</Description>
              <Port>84</Port>
              <Weight>100</Weight>
        </MasterSlaveBackendServer>
  </MasterSlaveBackendServers>
</CreateMasterSlaveServerGroupResponse>

JSON format

{
    "RequestId": "7CA4DB76-4D32-523B-822E-5C9494613D46",
    "MasterSlaveServerGroupId": "rsp-bp19au4******",
    "MasterSlaveBackendServers": {
        "MasterSlaveBackendServer": [
            {
                "ServerType": "Master",
                "Type": "ecs",
                "ServerId": "i-bp1fq61enf4loa5i****",
                "Description": "test-112",
                "Port": 82,
                "Weight": 100
            },
            {
                "ServerType": "Slave",
                "Type": "ecs",
                "ServerId": "i-bp10ephck4n5uehd****",
                "Description": "test-112",
                "Port": 84,
                "Weight": 100
            }
        ]
    }
}

Error codes


HttpCode	Error code	Error message	Description
400	BACKEND_SERVERS_NUM_MUST_BE_TWO	Backend servers num must be 2.	The error message returned because two backend servers must be specified.
400	BACKEND_SERVERS_HAVE_SAME_PORT_AND_SERVERID	Backend servers have same port and serverId.	The error message returned because a backend server with the same port and ID is already specified in the server group.
400	BACKEND_SERVERS_CAN_ONLY_CONTAIN_ONE_MASTER_AND_ONE_SLAVE	Backend servers can only contain one master and one slave.	The error message returned because a primary/secondary server group can contain only one primary server and one secondary server.
400	BACKEND_SERVER_ID_CAN_NOT_EMPTY	Backend server id can not empty.	The error message returned because the ID of the backend server is not specified.
400	INVALID_SERVER_TYPE	Invalid server type.	The error message returned because the specified type of backend server is invalid.
400	BACKEND_SERVER_PORT_CAN_NOT_EMPTY	Backend server port can not empty.	The error message returned because the port of the backend server is not specified.
400	RealServerPortNotSupport	Real server port not support.	The error message returned because the specified port of the backend server is invalid.
400	OperationUnsupported.CreateMasterSlaveServerGroup	This type of backend server is not allowed to attached to singleTunnel or anyTunnel lb.	The error message returned because the backend server cannot be added to a CLB instance of the singleTunnel or anyTunnel type.
400	IncorrectStatus.RSByPassToas	%s.	The error message returned because the BypassToa parameter of the specified backend server is set to an invalid value.
400	OperationFailed.ActionNotSupport	The loadbalancer does not support such action.	The error message returned because the instance does not support the operation.
400	RsTunnelIp2VmNameConflict	%s.	The error message returned because a backend server uses the same TunnelId and RsIp configurations as an existing backend server.
400	NetworkConflict	%s.	The error message returned because the vServer group configurations are inconsistent with the ECS configurations.

For a list of error codes, visit the API Error Center.