Non-Default Environment Variables UMASK And UMASK_DIR Have No Effect in MySQL 5.7
(Doc ID 2316230.1)
Last updated on FEBRUARY 15, 2019
Applies to:MySQL Server - Version 5.7 to 5.7 [Release 5.7]
Information in this document applies to any platform.
Using non-default access permissions (like 0700) for database directories and (like 0600) for table files in MySQL 5.7 using UMASK_DIR and UMASK environment variables (see MySQL Program Environment Variables), does not have any effect whereas it works in MySQL 5.6.
Here is an example in MySQL 5.7:
So the newly created table files (i.e. t_test.frm and t_test.ibd) don't have a mode 0600 (all values octal) as expected, but the newly created database directory (i.e. /var/lib/mysql/mytst) does not have the mode 0700 (all values octal) as expected.
The issue can start after upgrading to MySQL Server 5.7.
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