When your business requires more compute resources, upgrade MSE instance specifications to improve performance and stability. To reduce costs or optimize resource allocation, downgrade instance specifications. This topic describes how to change engine specifications and network configuration for MSE instances.
Precautions
The specification change takes approximately 10 minutes. During this period, you cannot perform any operations on the instance in the console. (Recommended) Perform the change during off-peak hours to minimize impact on your business.
For instances with 3 or more nodes, each node undergoes a rolling deployment with automatic data synchronization, ensuring a lossless change.
For most workloads, the change is lossless. However, network reconnections caused by the change may produce a small number of reconnection and access error logs, which is normal. Monitoring data may also experience brief fluctuations due to cluster restarts.
In some special scenarios, the change may not be lossless. Before performing the change, check whether any of the following situations apply:
Instances with 1 or 2 nodes — These are non-high-availability (HA) instances, and the change cannot be guaranteed to be lossless.
Older client version — If you use an older client version, there is an extremely low probability that network packet loss or other unknown exceptions during the change may trigger bugs in older client versions, causing services to go offline. The change cannot be guaranteed to be lossless.
Low version of Spring Cloud Alibaba — If you use a low version of Spring Cloud Alibaba and have configured the Spring Cloud Actuator health check path as the
liveness probeorreadiness probefor your business, there is an extremely low probability that probe failures may cause automatic service restarts due to bugs in older Spring Cloud Alibaba versions. The change cannot be guaranteed to be lossless.
Change engine specifications
Log on to the MSE Registration and Configuration Center console and select a region from the top menu bar.
In the left-side navigation pane, choose .
On the Instance List page, select the MSE instance whose specifications you want to change.
For subscription instances: Click More in the Actions column, and then select Upgrade or Downgrade based on your requirements.
For pay-as-you-go instances: Click More in the Actions column, and then click Upgrade/Downgrade.
On the Microservice Engine MSE (Subscription) | Change Specifications / Microservice Engine MSE (Pay-as-you-go) | Change Specifications page, change the Engine Specifications and Cluster Nodes configuration.
Click Buy Now.
Change network configuration
Log on to the MSE Registration and Configuration Center console and select a region from the top menu bar.
In the left-side navigation pane, choose .
On the Instance List page, click the instance ID of the target instance. On the Basic Information page, click Set Private Network / Set Public Network in the Network Information section.
In the Set Private Network / Set Public Network dialog box, change the network configuration and click OK.
Result
After the change is complete, return to the Instance List page and click the instance ID of the target instance. On the Basic Information page, verify the following fields:
Engine specification change — Confirm that the Engine Specifications and Node Count fields display the new values you selected.
Network configuration change — Confirm that the Private Network Address or Public Network Address reflects the updated network configuration.