Minimum GRANTs needed by mysqldump for dumping a full schema? (TRIGGERs are missing!!)

问题

I have a MySQL user called dump with the following perms:

GRANT USAGE ON *.* TO 'dump'@'%' IDENTIFIED BY ...
GRANT SELECT, LOCK TABLES ON `mysql`.* TO 'dump'@'%'
GRANT SELECT, LOCK TABLES ON `myschema`.* TO 'dump'@'%'

I want to dump all data (included triggers and procedures) using the dump user. I call mysqldump in the following way:

mysqldump -u dump -p --routines --triggers --quote-names --opt \
    --add-drop-database --databases myschema > myschema.sql

Everything is OK with the dumped file except for the triggers, they are missing!!

The triggers are dumped correctly if I try mysqldump with root MySQL user:

mysqldump -u root -p --routines --triggers --quote-names --opt \
    --add-drop-database --databases myschema > myschema.sql

So, I guess it is a perms issue... what are the extra grants my dump MySQL user needs for doing the full dump correctly?

回答1:

Assuming by full dump you also mean the VIEWs and the EVENTs, you would need:

GRANT USAGE ON *.* TO 'dump'@'%' IDENTIFIED BY ...;
GRANT SELECT, LOCK TABLES ON `mysql`.* TO 'dump'@'%';
GRANT SELECT, LOCK TABLES, SHOW VIEW, EVENT, TRIGGER ON `myschema`.* TO 'dump'@'%';

and if you have VIEWs that execute a function, then unfortunately you also need EXECUTE.

My own problem is: why do I need SELECT if I only want to make a no-data dump?

回答2:

I found the extra GRANT I needed!!

  GRANT TRIGGER ON `myschema`.* TO 'dump'@'%'

Here you have the reference on the official doc: http://dev.mysql.com/doc/refman/5.5/en/privileges-provided.html#priv_trigger

The TRIGGER privilege enables trigger operations. You must have this privilege for a table to create, drop, or execute triggers for that table.

回答3:

I found, that sometime if VIEW DEFINER user does not exist, dump fails.

Change it, as described there

回答4:

In addition to Jannes answer, when using mysqldump with --tab option (produces a tab-separated text file for each dumped table), your MySQL user must be granted the FILE privilege as well:

GRANT FILE ON *.* TO 'dump'@'%';

Official docs reference: https://dev.mysql.com/doc/refman/5.7/en/mysqldump.html#option_mysqldump_tab

Mentioned in this section:

This option should be used only when mysqldump is run on the same machine as the mysqld server. Because the server creates *.txt files in the directory that you specify, the directory must be writable by the server and the MySQL account that you use must have the FILE privilege. Because mysqldump creates *.sql in the same directory, it must be writable by your system login account.

来源：https://stackoverflow.com/questions/8658996/minimum-grants-needed-by-mysqldump-for-dumping-a-full-schema-triggers-are-miss

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mysql

database

mysqldump

database-backups

grant