Export MySQL user permissions

When migrating a MySQL database, you sometimes need to migrate the users and permissions in the source database. For this migration, we can obtain user-related information from the mysql. user table.

When migrating a MySQL database, you sometimes need to migrate the users and permissions in the source database. For this migration, we can obtain user-related information from the mysql. user table.

When migrating a MySQL database, you sometimes need to migrate the users and permissions in the source database. For this migration, we can obtain the user's related permissions from the mysql. user table to generate corresponding SQL statements, and then execute the generated SQL statements on the target server. This article provides a script for extracting User Permissions and a demonstration.

1. Generate a script for User Permissions

[Root @ HKBO ~] # More exp_grant.sh
#! /Bin/bash
# Function export user privileges

Pwd = 1, 123456
Expgrants ()
{
Mysql-B-u 'root'-p $ {pwd}-N $ @-e "SELECT CONCAT (
'Show grants for ''', user, ''' @ ''', host ,''';'
) AS query FROM mysql. user "| \
Mysql-u 'root'-p $ {pwd} $ @ | \
Sed's/\ (GRANT. * \)/\ 1;/; s/^ \ (Grants. * \)/-- \ 1/;/--/{x; p; x ;}'
}
Expgrants>./grants. SQL

2. Generate a permission SQL script

[Root @ HKBO ~] #./Exp_grant.sh

[Root @ HKBO ~] # Head grants. SQL
-- Grants for root@127.0.0.1
Grant all privileges on *. * TO 'root' @ '192. 0.0.1 'identified by password' * eb3ea446c759c9da93f84fcb561_dbef051a9dd' with grant option;
Grant all privileges on 'cnbo0815'. * TO 'root' @ '2017. 0.0.1 'with grant option;

-- Grants for root@172.16.10. %
Grant all privileges on *. * TO 'root' @ '192. 172.% 'identified by password' * 6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 ';

-- Grants for CNBO@192.168.1. %
Grant usage on *. * TO 'cnbo' @ '192. 192.% 'identified by password' * ABD91BAD4A3448428563952E281015B237310EA8 ';
...........................

-- Author: Leshami
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3. Execute the script on the target server.

Run the generated script on the target server. Mysql-uname-ppwd

Note:

A. The target service is a non-empty server. Some accounts and permissions should be covered.

B. If you only need to migrate non-root users, you can add filter conditions in the original script, that is, where user <> 'root '.

Refer:

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