en,zh: add v1.6.5 release notes; bump TiDB & TiDB Operator

en/TOC.md

@@ -131,6 +131,7 @@
   - [PingCAP Clinic Diagnostic Data](clinic-data-collection.md)
 - Release Notes
   - v1.6
+    - [1.6.5](releases/release-1.6.5.md)
     - [1.6.4](releases/release-1.6.4.md)
     - [1.6.3](releases/release-1.6.3.md)
     - [1.6.2](releases/release-1.6.2.md)

en/releases/release-1.6.5.md

@@ -0,0 +1,23 @@
+---
+title: TiDB Operator 1.6.5 Release Notes
+summary: Learn about new features, improvements, and bug fixes in TiDB Operator 1.6.5.
+---
+
+# TiDB Operator 1.6.5 Release Notes
+
+Release date: January 28, 2026
+
+TiDB Operator version: 1.6.5
+
+## New features
+
+- Support configuring `VolumeAttributesClass` for TiDBCluster components, which enables dynamic management of volume attributes such as IOPS and throughput ([#6568](https://github.com/pingcap/tidb-operator/pull/6568), [@WangLe1321](https://github.com/WangLe1321))
+
+## Improvements
+
+- Change the shell interpreter for backup-related scripts from `sh` to `bash` to improve script compatibility and support Bash-specific syntax ([#6618](https://github.com/pingcap/tidb-operator/pull/6618), [@liubog2008](https://github.com/liubog2008))
+
+## Bug fixes
+
+- Fix the issue that the controller retries indefinitely when a log backup task cannot be found in etcd. The controller now updates the `Backup` CR status to `Failed` in this case ([#6630](https://github.com/pingcap/tidb-operator/pull/6630), [@RidRisR](https://github.com/RidRisR))
+- Fix the compatibility issue with certain Kubernetes versions (such as v1.33) that causes TiDB Operator to repeatedly attempt creating existing resources during each sync cycle ([#6653](https://github.com/pingcap/tidb-operator/pull/6653), [@cicada-lewis](https://github.com/cicada-lewis))

variables.json

@@ -1,4 +1,4 @@
 {
-  "tidb_operator_version": "v1.6.4",
-  "tidb_version": "v8.5.2"
+  "tidb_operator_version": "v1.6.5",
+  "tidb_version": "v8.5.5"
 }

zh/TOC.md

@@ -131,6 +131,7 @@
   - [PingCAP Clinic 数据采集范围说明](clinic-data-collection.md)
 - 版本发布历史
   - v1.6
+    - [1.6.5](releases/release-1.6.5.md)
     - [1.6.4](releases/release-1.6.4.md)
     - [1.6.3](releases/release-1.6.3.md)
     - [1.6.2](releases/release-1.6.2.md)

zh/releases/release-1.6.5.md

@@ -0,0 +1,23 @@
+---
+title: TiDB Operator 1.6.5 Release Notes
+summary: 了解 TiDB Operator 1.6.5 版本的新功能、优化提升，以及 Bug 修复。
+---
+
+# TiDB Operator 1.6.5 Release Notes
+
+发布日期：2026 年 1 月 28 日
+
+TiDB Operator 版本：1.6.5
+
+## 新功能
+
+- 支持为 TiDBCluster 组件配置 `VolumeAttributesClass`，允许动态管理卷属性，例如 IOPS 和吞吐量 ([#6568](https://github.com/pingcap/tidb-operator/pull/6568), [@WangLe1321](https://github.com/WangLe1321))
+
+## 优化提升
+
+- 将备份相关脚本的 shell 解释器从 `sh` 更改为 `bash`，以增强脚本的兼容性并支持 Bash 特有语法 ([#6618](https://github.com/pingcap/tidb-operator/pull/6618), [@liubog2008](https://github.com/liubog2008))
+
+## Bug 修复
+
+- 修复当 etcd 中找不到日志备份任务时，控制器会无限重试的问题。修复后，如果出现此情况，`Backup` CR 的状态会被更新为 `Failed` ([#6630](https://github.com/pingcap/tidb-operator/pull/6630), [@RidRisR](https://github.com/RidRisR))
+- 修复与部分 Kubernetes 版本（如 v1.33）的兼容性问题，避免 TiDB Operator 在每个同步周期内重复尝试创建已存在的资源 ([#6653](https://github.com/pingcap/tidb-operator/pull/6653), [@cicada-lewis](https://github.com/cicada-lewis))