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Upgrading Kernel Minor Version of Database Proxy
TDSQL-C for MySQL irregularly updates the database proxy version. New versions may involve feature updates, performance optimization, or issue fixes. You can view the database proxy version update notes and assess the need for an upgrade based on the actual business situation. This document introduces the operations and instructions for manually upgrading the database proxy version through the console.
Prerequisites
The database proxy version of the current instance is not the latest version.
Upgrade Solutions
You can select the upgrade switch time according to the actual business situation to achieve a smoother upgrade.
Within maintenance time: An upgrade can be performed within the instance maintenance time. To set the instance maintenance time, see Modifying Instance Maintenance Time.
Upon upgrade completion: The selected database proxy version can be immediately switched to upon completion of the upgrade.
Rolling upgrade: New database proxy version nodes can be started. After startup, new connections will access the database through new database proxy version nodes, and old database proxy version nodes will no longer accept new connection requests. The switch waiting time can be set. When the switch time is reached, old database proxy version nodes will be reclaimed, and existing old connections on old nodes will be disconnected.
Must-Knows
During the database proxy version upgrade process, there will be a second-level momentary disconnection. Perform the upgrade during off-peak hours if possible, and ensure your application has an automatic reconnection mechanism.
When the database proxy version is upgraded, all proxy nodes will be upgraded simultaneously by default. If some proxy nodes have status exceptions, the upgrade cannot proceed.
The database proxy version can be upgraded only and cannot be downgraded.
Executable Tasks During Upgrade
During the database proxy version upgrade process, when Status/Task is Upgrading kernel minor version, you can perform the following operations on the database proxy: Modify the database proxy network, modify the private network address of the database proxy, and modify the remarks of the database proxy address. You cannot perform the following operations on the database proxy: Adjust configuration, disable the database proxy, upgrade the kernel minor version, rebalance the load, modify the network, or modify the IP address. To perform these operations, complete the upgrade task immediately.
Upgrading the Database Proxy Version
1. Log in to the TDSQL-C for MySQL console, select the region at the top, and click the target cluster ID to go to the Cluster Management page.
2. On the Cluster Management page, select the Database Proxy page.
3. On the Database Proxy page, choose Overview > Basic Info > Proxy Version, and click Upgrade Kernel Minor Version.
4. In the pop-up dialog box, select the target version of the upgrade, and select the upgrade switch time. After confirming that everything is correct, click OK.
Parameter | Operation Instruction |
Current Version | The current database proxy version of the instance is displayed. |
Target Version | Select the target database proxy version. For update notes of each version, see Database Proxy Version Update Notes. |
Switch Time | Select the upgrade switch time. Available options: Within maintenance time, Upon upgrade completion, and Rolling upgrade. During maintenance time: If you select Within maintenance time, the upgrade switch will be completed during the next maintenance period. Upon upgrade completion: If you select Upon upgrade completion, the switch will be performed immediately when the version upgrade is completed. Rolling upgrade: If you select Rolling upgrade, you need to set the switch waiting time (default time: 10 seconds; value range: 10 to 3600 seconds). When the switch waiting time is reached, the system will reclaim the old version nodes. |
Nodes to Upgrade | The database proxy node information involved in this upgrade is displayed under this item. |
Canceling Execution
During the database proxy version upgrade process, if the switch time is set to Rolling upgrade but the switch waiting time has not been reached, you can cancel the task execution depending on the actual situation. After cancellation, the database proxy version will not be upgraded this time.
1. On the Database Proxy page, choose Overview > Basic Info > Status/Task, and click Cancel Execution.
2. In the pop-up window, click OK.
Executing Immediately
Note:
After immediate execution, the old database proxy version nodes will be immediately reclaimed, and existing connections on the old database proxy version nodes will be immediately disconnected.
During the database proxy version upgrade process, if the switch time is set to During maintenance time but the maintenance time has not been reached, or if the switch time is set to Rolling upgrade but the switch waiting time has not been reached, you can perform the upgrade immediately and switch the database proxy version by following the steps below.
1. On the Database Proxy page, choose Overview > Basic Info > Status/Task, and click Execute Now.
2. In the pop-up window, click OK.
Related APIs
API | Description |
This API (UpgradeCDBProxyVersion) is used to upgrade the database proxy version. |
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