add-tikv-config: add max-days and max-backups (#2777)

Author: yiduoyunQ

en/configure-a-tidb-cluster.md

@@ -408,13 +408,18 @@ spec:
       [storage]
         [storage.block-cache]
           capacity = "16GB"
+      [log.file]
+        max-days = 30
+        max-backups = 30
 ```
 
 For all the configurable parameters of TiKV, refer to [TiKV Configuration File](https://docs.pingcap.com/tidb/stable/tikv-configuration-file).
 
 > **Note:**
 >
-> If you deploy your TiDB cluster using CR, make sure that `Config: {}` is set, no matter you want to modify `config` or not. Otherwise, TiKV components might not be started successfully. This step is meant to be compatible with `Helm` deployment.
+> - If you deploy your TiDB cluster using CR, make sure that `Config: {}` is set, no matter you want to modify `config` or not. Otherwise, TiKV components might not be started successfully. This step is meant to be compatible with `Helm` deployment.
+> - TiKV RocksDB logs are stored in the `/var/lib/tikv` data directory by default. It is recommended that you configure `max-days` and `max-backups` to automatically clean log files.
+> - You can also use the `separateRocksDBLog` configuration item to configure TiKV to output RocksDB logs to stdout through a sidecar container. For more information, see the [TiDB Cluster example](https://github.com/pingcap/tidb-operator/blob/master/examples/advanced/tidb-cluster.yaml).
 
 #### Configure PD parameters
 
@@ -487,7 +492,7 @@ spec:
       level = "info"
 ```
 
-For all the configurable parameters of TiProxy, refer to [TiProxy Configuration File](https://docs.pingcap.com/tidb/v7.6/tiproxy-configuration).
+For all the configurable parameters of TiProxy, refer to [TiProxy Configuration File](https://docs.pingcap.com/tidb/stable/tiproxy-configuration).
 
 #### Configure TiFlash parameters
 

zh/configure-a-tidb-cluster.md

@@ -402,13 +402,18 @@ spec:
       [storage]
         [storage.block-cache]
           capacity = "16GB"
+      [log.file]
+        max-days = 30
+        max-backups = 30
 ```
 
 获取所有可以配置的 TiKV 配置参数，请参考 [TiKV 配置文档](https://docs.pingcap.com/zh/tidb/stable/tikv-configuration-file)
 
 > **注意：**
 >
-> 为了兼容 `helm` 部署，如果你是通过 CR 文件部署 TiDB 集群，即使你不设置 Config 配置，也需要保证 `Config: {}` 的设置，从而避免 TiKV 组件无法正常启动。
+> - 为了兼容 `helm` 部署，如果你是通过 CR 文件部署 TiDB 集群，即使你不设置 Config 配置，也需要保证 `Config: {}` 的设置，从而避免 TiKV 组件无法正常启动。
+> - TiKV 的 RocksDB 日志默认存储在 `/var/lib/tikv` 数据目录，建议配置 `max-days` 和 `max-backups` 来自动清理日志文件。
+> - 你也可通过配置 `separateRocksDBLog` 将 RocksDB 日志通过单独的 sidecar 容器输出到 stdout。完整配置项请参考 [TiDB Cluster 示例](https://github.com/pingcap/tidb-operator/blob/master/examples/advanced/tidb-cluster.yaml)。
 
 #### 配置 PD 配置参数
 
@@ -477,7 +482,7 @@ spec:
       level = "info"
 ```
 
-获取所有可以配置的 TiProxy 配置参数，请参考 [TiProxy 配置文档](https://docs.pingcap.com/zh/tidb/v7.6/tiproxy-configuration)。
+获取所有可以配置的 TiProxy 配置参数，请参考 [TiProxy 配置文档](https://docs.pingcap.com/zh/tidb/stable/tiproxy-configuration)。
 
 #### 配置 TiFlash 配置参数