doc: translate manage_mysql_user and change file name. #564 (#611)

doc: translate manage_mysql_user and change file name.

Author: hayleyling

README_zh.md

@@ -36,7 +36,7 @@
 
 🎈 **集群日志管理**
 
-👨 [**账户管理**](docs/zh-cn/mgt_mysqluser.md)
+👨 [**账户管理**](docs/zh-cn/manage_mysql_user.md)
 
 
 ## 架构图

docs/en-us/manage_mysql_user.md

@@ -0,0 +1,81 @@
+English | [简体中文](../zh-cn/manage_mysql_user.md)
+
+Contents
+==========
+   * [1. Prerequisite](#1-prerequisite)
+   * [2. Create user accounts](#2-create-user-accounts)
+      * [2.1 Validate CRD](#21-validate-crd)
+      * [2.2 Create users](#22-create-users)
+      * [2.3 View users](#23-view-users)
+   * [3. Log on as a user](#3-log-on-as-a-user)
+   * [4. Delete users](#4-delete-users)
+   * [5. Parameters](#5-parameters)
+
+# Manage MySQL users with MysqlUser CRD
+
+##  1. Prerequisite
+
+* The [RadonDB MySQL cluster](deploy_radondb-mysql_operator_on_k8s.md) has been deployed.
+
+##  2. Create user accounts
+
+###  2.1 Validate CRD
+
+Run the following command, and the `mysqlusers.mysql.radondb.com` CRD is displayed.
+
+```plain
+kubectl get crd | grep mysqluser
+mysqlusers.mysql.radondb.com                          2021-09-21T09:15:08Z
+```
+
+###  2.2 Create users
+
+Run the following command to create a normal user named `normal_user` and a superuser named `super_user`. The user password is saved in the `sample-user-password` [Secret](https://kubernetes.io/docs/concepts/configuration/secret/).
+
+```plain
+kubectl apply -f https://github.com/radondb/radondb-mysql-kubernetes/releases/latest/download/mysql_v1alpha1_mysqluser.yaml
+```
+
+> **Note:** In the example, the passwords for the normal user and superuser are both `RadonDB@123`.
+
+### 2.3 View users
+
+```plain
+kubectl get mysqluser -o wide                                                                                      
+NAME          USERNAME      SUPERUSER   HOSTS   TLSTYPE   CLUSTER   NAMESPACE   AVAILABLE   SECRETNAME             SECRETKEY
+normal-user   normal_user   false       ["%"]   NONE      sample    default     True        sample-user-password   normalUser
+super-user    super_user    true        ["%"]   NONE      sample    default     True        sample-user-password   superUser
+```
+
+## 3. Log on as a user
+
+Run the following command to connect to the primary node of the MySQL cluster as `super_user`.
+
+```plain
+kubectl exec -it svc/sample-leader -c mysql -- mysql -usuper_user -pRadonDB@123
+```
+
+## 4. Delete users
+Run the following command to delete the `MysqlUser` CRD and the users created in the example.
+```plain
+kubectl delete mysqluser normal-user super-user
+```
+
+## 5. Parameters
+| Parameters                | Description                                                        |
+| ------------------------- | ------------------------------------------------------------------ |
+| user                      | User name                                                          |
+| hosts                     | Hosts allowed to access; `%` indicates all hosts can be accessed.  |
+| withGrantOption           | Whether a user can authorize other users; default value: `false`   |
+| tlsOptions.type           | TLS type; valid values: `NONE`/`SSL`/`X509`; default value: `NONE` |
+| permissions.database      | Authorized databases; `*` indicates all databases are authorized.  |
+| permissions.tables        | Authorized tables; `*` indicates all tables are authorized.        |
+| permissions.privileges    | Privileges                                                         |
+| userOwner.clusterName     | Name of the cluster that the user is in                            |
+| userOwner.nameSpace       | Namespace of the cluster that the user is in                       |
+| secretSelector.secretName | Name of the Secret saving the user password                        |
+| secretSelector.secretKey  | Key of the Secret saving the user password                         |
+
+> For more details, see [Account Management Statements](https://dev.mysql.com/doc/refman/5.7/en/account-management-statements.html).
+
+> Note: Modifying `spec.user` directly will create a user with the new username. To create multiple users, ensure that `metadata.name` (CRD instance name) is consistent with `spec.user` (username).

docs/en-us/mgt_mysqlusser.md

@@ -1,4 +1,4 @@
-[English](../en-us/mgt_mysqlusser.md) | 简体中文
+[English](../en-us/manage_mysql_user.md) | 简体中文
 
 目录
 ==========