Performing a Switchback
Function
In the Unbalanced state, the number of primary instances on some nodes increases. As a result, the load pressure is high. In this case, the cluster is normal, but the overall performance is not as good as that in a balanced state. You can perform a primary/standby switchback to change the cluster status to Available.
Constraints
Only 8.1.1.202 and later versions support primary/standby switchbacks.
A switchback interrupts services for a short period of time. The interruption duration depends on the service volume. You are advised to perform this operation during off-peak hours.
Calling Method
For details, see Calling APIs.
URI
POST /v1.0/{project_id}/clusters/{cluster_id}/switchover
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Definition Project ID. To obtain the value, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A |
cluster_id |
Yes |
String |
Definition Cluster ID. For details about how to obtain the value, see Obtaining the Cluster ID. Constraints N/A Range N/A Default Value N/A |
Request Parameters
None
Response Parameters
Status code: 200
The request for performing a primary/standby switchback is submitted.
None
Example Requests
Perform a primary/standby switchback.
POST https://{Endpoint}/v1.0/89cd04f168b84af6be287f71730fdb4b/clusters/4ca46bf1-5c61-48ff-b4f3-0ad4e5e3ba90/switchover
Example Responses
Status code: 200
The request for performing a primary/standby switchback is submitted.
{ }
Status Codes
Status Code |
Description |
---|---|
200 |
The request for performing a primary/standby switchback is submitted. |
400 |
Request error. |
401 |
Authentication failed. |
403 |
You do not have required permissions. |
404 |
No resources found. |
500 |
Internal server error. |
503 |
Service unavailable. |
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