en, zh: add release notes for v1.2.0-alpha.1 (#1051)

en/TOC.md

@@ -92,6 +92,8 @@
   - [Monitoring and Alert on Kubernetes](monitor-kubernetes.md)
 + [TiDB Operator Roadmap](roadmap.md)
 + Release Notes
+  + v1.2
+    - [1.2.0-alpha.1](releases/release-1.2.0-alpha.1.md)
   + v1.1
     - [1.1.9](releases/release-1.1.9.md)
     - [1.1.8](releases/release-1.1.8.md)

en/releases/release-1.2.0-alpha.1.md

@@ -0,0 +1,33 @@
+---
+title: TiDB Operator 1.2.0-alpha.1 Release Notes
+---
+
+# TiDB Operator 1.2.0-alpha.1 Release Notes
+
+Release date: January 15, 2021
+
+TiDB Operator version: 1.2.0-alpha.1
+
+## Rolling Update Changes
+
+- Due to [#3440](https://github.com/pingcap/tidb-operator/pull/3440), the Pod of TidbMonitor will be deleted and recreated after TiDB Operator is upgraded to v1.2.0-alpha.1.
+
+## New Features
+
+- Deploy one TiDB cluster across multiple Kubernetes clusters ([@L3T](https://github.com/L3T), [@handlerww](https://github.com/handlerww))
+- Support DM 2.0 in TiDB Operator ([@lichunzhu](https://github.com/lichunzhu), [@BinChenn](https://github.com/BinChenn))
+- Auto-Scaling with PD API ([@howardlau1999](https://github.com/howardlau1999))
+- Canary Upgrade of TiDB Operator ([#3548](https://github.com/pingcap/tidb-operator/pull/3548), [@shonge](https://github.com/shonge), [#3554](https://github.com/pingcap/tidb-operator/pull/3554), [@cvvz](https://github.com/cvvz))
+
+## Improvements
+
+- Add local backend support for the TiDB Lightning chart ([#3644](https://github.com/pingcap/tidb-operator/pull/3644), [@csuzhangxc](https://github.com/csuzhangxc))
+- Add TLS support for the TiDB Lightning chart and TiKV Importer chart ([#3598](https://github.com/pingcap/tidb-operator/pull/3598), [@csuzhangxc](https://github.com/csuzhangxc))
+- Support persisting checkpoint for TiDB Lightning helm chart ([#3653](https://github.com/pingcap/tidb-operator/pull/3653), [@csuzhangxc](https://github.com/csuzhangxc))
+- Support Thanos sidecar for monitoring multiple clusters ([#3579](https://github.com/pingcap/tidb-operator/pull/3579), [@mikechengwei](https://github.com/mikechengwei))
+- Migrate from Deployment to StatefulSet for TidbMonitor ([#3440](https://github.com/pingcap/tidb-operator/pull/3440), [@mikechengwei](https://github.com/mikechengwei))
+
+## Other Notable Changes
+
+- Optimize rate limiter intervals ([#3700](https://github.com/pingcap/tidb-operator/pull/3700), [@dragonly](https://github.com/dragonly))
+- Change the directory to save the customized alert rules in TidbMonitor from `tidb:${tidb_image_version}` to `tidb:${initializer_image_version}`. Please note that if the `spec.initializer.version` in the TidbMonitor does not match with the TiDB version in the TidbCluster, upgrading TiDB Operator will cause the re-creation of the monitor Pod ([#3684](https://github.com/pingcap/tidb-operator/pull/3684), [@BinChenn](https://github.com/BinChenn))

zh/TOC.md

@@ -96,6 +96,8 @@
   - [Kubernetes 监控与告警](monitor-kubernetes.md)
 + [TiDB Operator Roadmap](roadmap.md)
 + 版本发布历史
+  + v1.2
+    - [1.2.0-alpha.1](releases/release-1.2.0-alpha.1.md)
   + v1.1
     - [1.1.9](releases/release-1.1.9.md)
     - [1.1.8](releases/release-1.1.8.md)

zh/releases/release-1.2.0-alpha.1.md

@@ -0,0 +1,33 @@
+---
+title: TiDB Operator 1.2.0-alpha.1 Release Notes
+---
+
+# TiDB Operator 1.2.0-alpha.1 Release Notes
+
+发布日期：2021 年 1 月 15 日
+
+TiDB Operator 版本：1.2.0-alpha.1
+
+## 滚动升级改动
+
+- 由于 [#3440](https://github.com/pingcap/tidb-operator/pull/3440) 的改动，升级 TiDB Operator 到 v1.2.0-alpha.1 版本后，TidbMonitor Pod 会被删除重建。
+
+## 新功能
+
+- 跨多个 Kubernetes 集群部署一个 TiDB 集群 ([@L3T](https://github.com/L3T), [@handlerww](https://github.com/handlerww))
+- 支持管理 DM 2.0 ([@lichunzhu](https://github.com/lichunzhu), [@BinChenn](https://github.com/BinChenn))
+- 通过 PD API 进行弹性伸缩 ([@howardlau1999](https://github.com/howardlau1999))
+- 支持灰度升级 TiDB Operator ([#3548](https://github.com/pingcap/tidb-operator/pull/3548), [@shonge](https://github.com/shonge), [#3554](https://github.com/pingcap/tidb-operator/pull/3554), [@cvvz](https://github.com/cvvz))
+
+## 优化提升
+
+- TiDB Lightning chart 支持 local backend ([#3644](https://github.com/pingcap/tidb-operator/pull/3644), [@csuzhangxc](https://github.com/csuzhangxc))
+- TiDB Lightning chart 和 TiKV Importer chart 支持 TLS ([#3598](https://github.com/pingcap/tidb-operator/pull/3598), [@csuzhangxc](https://github.com/csuzhangxc))
+- TiDB Lightning chart 支持持久化 checkpoint ([#3653](https://github.com/pingcap/tidb-operator/pull/3653), [@csuzhangxc](https://github.com/csuzhangxc))
+- TidbMonitor 支持配置 Thanos sidecar ([#3579](https://github.com/pingcap/tidb-operator/pull/3579), [@mikechengwei](https://github.com/mikechengwei))
+- TidbMonitor 管理资源从 Deployment 变为 StatefulSet ([#3440](https://github.com/pingcap/tidb-operator/pull/3440), [@mikechengwei](https://github.com/mikechengwei))
+
+## 其他改进
+
+- 优化队列 rate limiter 间隔 ([#3700](https://github.com/pingcap/tidb-operator/pull/3700), [@dragonly](https://github.com/dragonly))
+- 修改 TidbMonitor 自定义告警规则存储目录，从 `tidb:${tidb_image_version}` 变为 `tidb:${initializer_image_version}`。需要注意的是，如果 TidbMonitor 中的 `spec.initializer.version` 和 TidbCluster 中的 TiDB 版本不匹配，升级 TiDB Operator 会导致监控 Pod 重建 ([#3684](https://github.com/pingcap/tidb-operator/pull/3684), [@BinChenn](https://github.com/BinChenn))