Mysql添加一個新的用戶并賦予權限

添加一個自己的用戶到mysql

首先我們需要先用root用戶登錄mysql，但是剛安裝完沒有密碼，我們先跳過密碼

ailumiyana@ailumiyana:~/Git_Project/Go_Test$ sudo mysqld_safe --skip-grant-tables

2019-01-07T01:35:51.559420Z mysqld_safe Logging to syslog.

2019-01-07T01:35:51.563797Z mysqld_safe Logging to '/var/log/mysql/error.log'.

root登陸

ailumiyana@ailumiyana:~/Git_Project/Go_Test$ sudo mysql -u root

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 4

Server version: 5.7.24-0ubuntu0.18.04.1 (Ubuntu)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

切換數據庫， use mysql

mysql> use mysql

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

查看mysql下的表單.

mysql> show tables;

+---------------------------+

| Tables_in_mysql |

+---------------------------+

| columns_priv |

| db |

| engine_cost |

| event |

| func |

| general_log |

| gtid_executed |

| help_category |

| help_keyword |

| help_relation |

| help_topic |

| innodb_index_stats |

| innodb_table_stats |

| ndb_binlog_index |

| plugin |

| proc |

| procs_priv |

| proxies_priv |

| server_cost |

| servers |

| slave_master_info |

| slave_relay_log_info |

| slave_worker_info |

| slow_log |

| tables_priv |

| time_zone |

| time_zone_leap_second |

| time_zone_name |

| time_zone_transition |

| time_zone_transition_type |

| user |

| user_info |

+---------------------------+

32 rows in set (0.00 sec)

查看user表

mysql> desc user;

+------------------------+-----------------------------------+------+-----+-----------------------+-------+

| Field | Type | Null | Key | Default | Extra |

+------------------------+-----------------------------------+------+-----+-----------------------+-------+

| Host | char(60) | NO | PRI | | |

| User | char(32) | NO | PRI | | |

| Select_priv | enum('N','Y') | NO | | N | |

| Insert_priv | enum('N','Y') | NO | | N | |

| Update_priv | enum('N','Y') | NO | | N | |

| Delete_priv | enum('N','Y') | NO | | N | |

| Create_priv | enum('N','Y') | NO | | N | |

| Drop_priv | enum('N','Y') | NO | | N | |

| Reload_priv | enum('N','Y') | NO | | N | |

| Shutdown_priv | enum('N','Y') | NO | | N | |

| Process_priv | enum('N','Y') | NO | | N | |

| File_priv | enum('N','Y') | NO | | N | |

| Grant_priv | enum('N','Y') | NO | | N | |

| References_priv | enum('N','Y') | NO | | N | |

| Index_priv | enum('N','Y') | NO | | N | |

| Alter_priv | enum('N','Y') | NO | | N | |

| Show_db_priv | enum('N','Y') | NO | | N | |

| Super_priv | enum('N','Y') | NO | | N | |

| Create_tmp_table_priv | enum('N','Y') | NO | | N | |

| Lock_tables_priv | enum('N','Y') | NO | | N | |

| Execute_priv | enum('N','Y') | NO | | N | |

| Repl_slave_priv | enum('N','Y') | NO | | N | |

| Repl_client_priv | enum('N','Y') | NO | | N | |

| Create_view_priv | enum('N','Y') | NO | | N | |

| Show_view_priv | enum('N','Y') | NO | | N | |

| Create_routine_priv | enum('N','Y') | NO | | N | |

| Alter_routine_priv | enum('N','Y') | NO | | N | |

| Create_user_priv | enum('N','Y') | NO | | N | |

| Event_priv | enum('N','Y') | NO | | N | |

| Trigger_priv | enum('N','Y') | NO | | N | |

| Create_tablespace_priv | enum('N','Y') | NO | | N | |

| ssl_type | enum('','ANY','X509','SPECIFIED') | NO | | | |

| ssl_cipher | blob | NO | | NULL | |

| x509_issuer | blob | NO | | NULL | |

| x509_subject | blob | NO | | NULL | |

| max_questions | int(11) unsigned | NO | | 0 | |

| max_updates | int(11) unsigned | NO | | 0 | |

| max_connections | int(11) unsigned | NO | | 0 | |

| max_user_connections | int(11) unsigned | NO | | 0 | |

| plugin | char(64) | NO | | mysql_native_password | |

| authentication_string | text | YES | | NULL | |

| password_expired | enum('N','Y') | NO | | N | |

| password_last_changed | timestamp | YES | | NULL | |

| password_lifetime | smallint(5) unsigned | YES | | NULL | |

| account_locked | enum('N','Y') | NO | | N | |

+------------------------+-----------------------------------+------+-----+-----------------------+-------+

45 rows in set (0.03 sec)

查看user中的已存在的用戶和主機

mysql> select Host, User from user;

+-----------+------------------+

| Host | User |

+-----------+------------------+

| localhost | debian-sys-maint |

| localhost | mysql.session |

| localhost | mysql.sys |

| localhost | root |

+-----------+------------------+

4 rows in set (0.00 sec)

接著我們新增一個自己的賬戶使用

mysql> CREATE USER '填用戶名'@'localhost' IDENTIFIED BY '填密碼';

Query OK, 0 rows affected (0.04 sec)

再次查看user表

mysql> select Host, User from user;

+-----------+------------------+

| Host | User |

+-----------+------------------+

| localhost | ailumiyana |

| localhost | debian-sys-maint |

| localhost | mysql.session |

| localhost | mysql.sys |

| localhost | root |

+-----------+------------------+

5 rows in set (0.00 sec)

給新建的用戶添加權限，刷新權限后， 查看新增用戶的權限是否已經加進去.

mysql> grant insert,select,delete,update,create,drop on *.* to ailumiyana@"localhost" identified by 'qwedsa';

Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> show grants for ailumiyana@localhost;

+---------------------------------------------------------------------------------------+

| Grants for ailumiyana@localhost |

+---------------------------------------------------------------------------------------+

| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP ON *.* TO 'ailumiyana'@'localhost' |

+---------------------------------------------------------------------------------------+

1 row in set (0.00 sec)

當然我們自己用，當然設置所有權限，更為便捷，那么可以改成這樣子

all privileges 表示所有權限.

mysql> grant all privileges on *.* to ailumiyana@"localhost" identified by 'qwedsa';

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> show grants for ailumiyana@localhost;

+---------------------------------------------------------+

| Grants for ailumiyana@localhost |

+---------------------------------------------------------+

| GRANT ALL PRIVILEGES ON *.* TO 'ailumiyana'@'localhost' |

+---------------------------------------------------------+

1 row in set (0.00 sec)

退出,重啟服務.

mysql> exit

Bye

ailumiyana@ailumiyana:~/Git_Project/Go_Test$ service mysql restart

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===

Authentication is required to restart 'mysql.service'.

Authenticating as: ailumiyana,,, (ailumiyana)

Password:

==== AUTHENTICATION COMPLETE ===

這樣新用戶就添加進去了，也配置了適當的權限，接下來用golang簡單測試一下。

使用go-sql-driver驅動測試Mysql

先在mysql中創建一個表

mysql> create table user_info(

-> id int(4) not null primary key auto_increment,

-> name char(20) not null);

Query OK, 0 rows affected (0.29 sec)

插入兩個數據到user_info表中，然后查詢此表。

package main

import (

"github.com/astaxie/beego/logs"

"database/sql"

_ "github.com/go-sql-driver/mysql"

)

func main() {

logs.Debug("main()")

db, err := sql.Open("mysql", "ailumiyana:qwedsa@tcp(127.0.0.1:3306)/mysql")

if err != nil {

logs.Error("sql Open() err", err)

}

stmt, err := db.Prepare("Insert user_info set id=?,name=?")

if err != nil {

logs.Error("sql Prepare() err", err)

}

stmt.Exec(1, "sola")

stmt.Exec(2, "ailumiyana")

rows, err :=db.Query("SELECT * FROM user_info")

if err != nil {

logs.Error("sql Query() err", err)

}

for rows.Next() {

var uid int

var username string

err = rows.Scan(&uid, &username)

if err != nil {

logs.Error("sql rows.Scan() err", err)

}

logs.Debug(uid, username)

}

}

其中sql.Open中的 第二個從參數是DSN格式數據 :

DSN(數據源名稱)

數據源名稱有一種常見的格式，例如PEAR DB使用的它，但是沒有類型前綴(可選部分用方括號標記):

DSN的完整形式:

另外此例用了beego 的日志模塊，和go-sql-driver驅動，使用前需要先用go get 下載。

go get可以根據要求和實際情況從互聯網上下載或更新指定的代碼包及其依賴包，并對它們進行編譯和安裝。在上面這個示例中，我們從著名的代碼托管站點Github上下載了一個項目(或稱代碼包)，并安裝到了環境變量GOPATH中包含的第一個工作區中。

結果

ailumiyana@ailumiyana:~/Git_Project/Go_Test$ go run mysql.go

2019/01/07 14:38:08.438 [D] main()

2019/01/07 14:38:08.443 [D] 1 sola

2019/01/07 14:38:08.443 [D] 2 ailumiyana

mysql> select * from user_info

-> ;

+----+-------------+

| id | name |

+----+-------------+

| 1 | sola |

| 2 | ailumiyana |

+----+-------------+

2 rows in set (0.02 sec)