Querying API Versions
Function
This API is used to query all available ELB API versions. Generally, APIs of a later version (v3 is the latest version) support more features than those of an earlier version.
Note the following when using APIs of different versions:
-
The API (POST /v3/{project_id}/elb/loadbalancers) cannot be used to create shared load balancers. To create a shared load balancer, you can call v2/v2.0 API, the API (/v3/{project_id}/elb/loadbalancers/batch-create) to batch create load balancers, or the API (/v3/{project_id}/elb/loadbalancers/{loadbalancer_id}/clone) to copy a load balancer.
-
Other v3 APIs can be used to manage both dedicated and shared load balancers and their associated resources. For example, you can call the API (POST /v3/{project_id}/elb/listeners) to add a listener to a shared load balancer. However, some features of dedicated load balancers are not supported. For details, see each API description.
Calling Method
For details, see Calling APIs.
URI
GET /versions
Request Parameters
None
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
versions |
Array of ApiVersionInfo objects |
Definition: Specifies the available API version. |
Parameter |
Type |
Description |
---|---|---|
id |
String |
Definition: Specifies the API version. Range: The value can be v3, v2, or v2.0 in descending order. |
status |
String |
Definition: Specifies the status of the API version. Range:
|
Example Requests
Querying API versions of a load balancer
GET https://{ELB_Endpoint}/versions
Example Responses
Status code: 200
Successful request.
{ "versions" : [ { "id" : "v3", "status" : "CURRENT" }, { "id" : "v2", "status" : "STABLE" }, { "id" : "v2.0", "status" : "STABLE" } ] }
SDK Sample Code
The SDK sample code is as follows.
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package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.elb.v3.region.ElbRegion; import com.huaweicloud.sdk.elb.v3.*; import com.huaweicloud.sdk.elb.v3.model.*; public class ListApiVersionsSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); ICredential auth = new BasicCredentials() .withAk(ak) .withSk(sk); ElbClient client = ElbClient.newBuilder() .withCredential(auth) .withRegion(ElbRegion.valueOf("<YOUR REGION>")) .build(); ListApiVersionsRequest request = new ListApiVersionsRequest(); try { ListApiVersionsResponse response = client.listApiVersions(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
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# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkelb.v3.region.elb_region import ElbRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkelb.v3 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] credentials = BasicCredentials(ak, sk) client = ElbClient.new_builder() \ .with_credentials(credentials) \ .with_region(ElbRegion.value_of("<YOUR REGION>")) \ .build() try: request = ListApiVersionsRequest() response = client.list_api_versions(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
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package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" elb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). Build() client := elb.NewElbClient( elb.ElbClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.ListApiVersionsRequest{} response, err := client.ListApiVersions(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
Status Code |
Description |
---|---|
200 |
Successful request. |
Error Codes
See Error Codes.
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