ListServerGroups - Server Load Balancer - Alibaba Cloud Documentation Center

Queries the server groups of a Gateway Load Balancer (GWLB) instance.

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Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
gwlb:ListServerGroups	get	ServerGroup `acs:gwlb:{#regionId}:{#accountId}:servergroup/` ServerGroup `acs:gwlb:{#regionId}:{#accountId}:servergroup/{#ServerGroupId}` VPC `acs:vpc:{#regionId}:{#accountId}:vpc/{#VpcId}`	none	none

Request parameters

Parameter	Type	Required	Description	Example
ServerGroupIds	array	No	The server group IDs. You can specify at most 20 server group IDs in each call.
ServerGroupId	string	No	The server group ID.	sgp-atstuj3rtoptyui****
ServerGroupNames	array	No	The server group names. You can specify at most 20 server group names in each call.
ServerGroupName	string	No	The server group name.	testServerGroupName
ServerGroupType	string	No	The server group type. Valid values: Instance: allows you to specify servers of the Ecs, Eni, or Eci type. Ip: allows you to add servers of by specifying IP addresses.	Instance
ResourceGroupId	string	No	The ID of the resource group to which the instance belongs.	rg-atstuj3rtop****
Tag	array<object>	No	The tag keys. You can specify at most 20 tags in each call.
TagModel	object	No	The tag.
Key	string	No	The tag key. The tag key cannot be an empty string. The tag key can be up to 128 characters in length, and cannot start with `acs:` or `aliyun`. The tag key cannot contain `http://` or `https://`.	testTagKey
Value	string	No	The tag value. The tag value can be up to 256 characters in length and cannot contain `http://` or `https://`.	testTagValue
VpcId	string	No	The VPC ID.	vpc-bp15zckdt37pq72zv****
NextToken	string	No	The pagination token that is used in the next request to retrieve a new page of results. Valid values: If NextToken is empty, no next page exists. If a value of NextToken is returned, the value indicates the token that is used for the next query.	FFmyTO70tTpLG6I3FmYAXGKPd****
MaxResults	integer	No	The number of entries per page. Valid values: 1 to 1000. Default value: 20.	20
Skip	integer	No	The number of entries to be skipped in the call.	1

Response parameters

Parameter	Type	Description	Example
	object	The response parameters.
MaxResults	integer	The number of entries per page. Valid values: 1 to 1000.	20
NextToken	string	A pagination token. It can be used in the next request to retrieve a new page of results. Valid values: If NextToken is empty, no next page exists. If a value of NextToken is returned, the value indicates the token that is used for the next query.	FFmyTO70tTpLG6I3FmYAXGKPd****
RequestId	string	The request ID.	54B48E3D-DF70-471B-AA93-08E683A1B45
ServerGroups	array<object>	The configurations of the server group.
serverGroup	object	The server group.
ConnectionDrainConfig	object	The configurations of connection draining.
ConnectionDrainEnabled	boolean	Indicates whether connection draining is enabled. Valid values: true false	false
ConnectionDrainTimeout	integer	The timeout period of connection draining. Unit: seconds Valid values: 1 to 3600.	300
CreateTime	string	The time when the resource was created. The time follows the ISO 8601 standard in the yyyy-MM-ddTHH:mm:ssZ format. The time is displayed in UTC.	2024-08-05T18:24:07Z
HealthCheckConfig	object	The configuration of health checks.
HealthCheckConnectPort	integer	The backend server port that is used for health checks. Valid values: 1 to 65535.	80
HealthCheckConnectTimeout	integer	The maximum timeout period of a health check. Unit: seconds Valid values: 1 to 300.	5
HealthCheckDomain	string	The domain name that is used for health checks. Valid values: $SERVER_IP: the internal IP address of a backend server. domain: a domain name. The domain name must be 1 to 80 characters in length, and can contain letters, digits, hyphens (-), and periods (.). Note This parameter takes effect only if you set HealthCheckProtocol to HTTP.	$SERVER_IP
HealthCheckEnabled	boolean	Indicates whether the health check feature is enabled. Valid values: true false	true
HealthCheckHttpCode	array	The HTTP status codes that the system returns for health checks.
HealthCheckHttpCode	string	The HTTP status code to return for health checks. Separate multiple HTTP status codes with commas (,). Valid values: http_2xx http_3xx http_4xx http_5xx Default value: http_2xx. Note This parameter takes effect only if you set HealthCheckProtocol to HTTP.	http_2xx
HealthCheckInterval	integer	The interval at which health checks are performed. Unit: seconds Valid values: 1 to 50.	10
HealthCheckPath	string	The URL that is used for health checks. The URL must be 1 to 80 characters in length, and can contain letters, digits, and the following special characters: `- / . % ? # &` The URL must start with a forward slash (/). Note This parameter takes effect only if you set HealthCheckProtocol to HTTP.	/test/index.html
HealthCheckProtocol	string	The protocol that is used for health checks. Valid values: TCP: TCP health checks send TCP SYN packets to a backend server to check whether the port of the backend server is reachable. HTTP: HTTP health checks simulate a process that uses a web browser to access resources by sending HEAD or GET requests to an instance. These requests are used to check whether the instance is healthy.	TCP
HealthyThreshold	integer	The number of times that an unhealthy backend server must consecutively pass health checks before it is declared healthy. In this case, the health status changes from fail to success. Valid values: 2 to 10.	2
UnhealthyThreshold	integer	The number of times that a healthy backend server must consecutively fail health checks before it is declared unhealthy. In this case, the health status changes from success to fail. Valid values: 2 to 10.	2
Protocol	string	The backend protocol. Valid values: GENEVE.	GENEVE
RelatedLoadBalancerIds	array	The IDs of the GWLB instances that are associated with the server group.
LoadBalancerId	string	The ID of the GWLB instance that is associated with the server group.	gwlb-cp6prgqy40hols****
ResourceGroupId	string	The resource group ID.	rg-atstuj3rtop****
Scheduler	string	The scheduling algorithm. Valid values: 5TCH: indicates consistent hashing that is based on the following factors: source IP address, destination IP address, source port, protocol, and destination port. Requests that contain the same information based on the preceding factors are forwarded to the same backend server. 3TCH: indicates consistent hashing that is based on the following factors: source IP address, destination IP address, and protocol. Requests that contain the same information based on the preceding factors are forwarded to the same backend server. 2TCH: indicates consistent hashing that is based on the following factors: source IP address and destination IP address. Requests that contain the same information based on the preceding factors are forwarded to the same backend server.	5TCH
ServerCount	integer	The number of server groups.	2
ServerGroupId	string	The server group ID.	sgp-atstuj3rtoptyui****
ServerGroupName	string	The server group name.	testServerGroupName
ServerGroupStatus	string	The status of the server group. Valid values: Creating Available Configuring	Available
ServerGroupType	string	The server group type. Valid values: Instance: allows you to specify servers of the Ecs, Eni, or Eci type. Ip: allows you to add servers of by specifying IP addresses.	Instance
Tags	array<object>	The tags.
TagModel	object	The tag.
Key	string	The tag key. The tag key cannot be an empty string. The tag key can be up to 128 characters in length, and cannot start with `acs:` or `aliyun`. The tag key cannot contain `http://` or `https://`.	testTagKey
Value	string	The tag value. The tag value can be up to 256 characters in length and cannot contain `http://` or `https://`.	testTagValue
VpcId	string	The VPC ID.	vpc-bp15zckdt37pq72zv****
TotalCount	integer	The total number of entries returned.	1

Examples

Sample success responses

JSONformat

{
  "MaxResults": 20,
  "NextToken": "FFmyTO70tTpLG6I3FmYAXGKPd****",
  "RequestId": "54B48E3D-DF70-471B-AA93-08E683A1B45",
  "ServerGroups": [
    {
      "ConnectionDrainConfig": {
        "ConnectionDrainEnabled": false,
        "ConnectionDrainTimeout": 300
      },
      "CreateTime": "2024-08-05T18:24:07Z",
      "HealthCheckConfig": {
        "HealthCheckConnectPort": 80,
        "HealthCheckConnectTimeout": 5,
        "HealthCheckDomain": "$SERVER_IP",
        "HealthCheckEnabled": true,
        "HealthCheckHttpCode": [
          "http_2xx"
        ],
        "HealthCheckInterval": 10,
        "HealthCheckPath": "/test/index.html",
        "HealthCheckProtocol": "TCP",
        "HealthyThreshold": 2,
        "UnhealthyThreshold": 2
      },
      "Protocol": "GENEVE",
      "RelatedLoadBalancerIds": [
        "gwlb-cp6prgqy40hols****"
      ],
      "ResourceGroupId": "rg-atstuj3rtop****",
      "Scheduler": "5TCH",
      "ServerCount": 2,
      "ServerGroupId": "sgp-atstuj3rtoptyui****",
      "ServerGroupName": "testServerGroupName",
      "ServerGroupStatus": "Available",
      "ServerGroupType": "Instance",
      "Tags": [
        {
          "Key": "testTagKey",
          "Value": "testTagValue"
        }
      ],
      "VpcId": "vpc-bp15zckdt37pq72zv****"
    }
  ],
  "TotalCount": 1
}

Error codes

For a list of error codes, visit the Service error codes.