The secure_log_path variable

secure_log_path

This variable is implemented in Percona Server for MySQL 8.0.28-19 (2022-05-12).

Variable Name	Description
Command-line	–secure-log-path
Dynamic	No
Scope	Global
Data type	String
Default	empty string

This variable restricts the location of the slow_query_log, general_log, and buffered_error_log files. Also, this variable is applied to the following options:

• slow_query_log_file - specifies the name of the slow query log file and the directory where to store this file.

• general_log_file - specifies the name of the general log file and the directory where to store this file.

• buffered_error_log_filename - specifies the name of the buffered error log file and the directory where to store this file. You can specify the size of the buffer for error logging in bytes with the buffered-error-log-size option.

The secure_log_path variable is read-only and is set up in a configuration file or the command line.

The value accepts a directory name as a string. The default value is an empty string. An empty string adds a warning to the error log and the log files are located in the default directory, /var/lib/mysql. If the value is a directory name, the log files are located in that directory. An attempt to move the log files from the specified directory results in an error.

The example of the secure_log_path variable usage

Run the following commands as root:

1. Create the direcory to store the log files.

   [root@localhost ~]# mkdir /var/lib/mysqld-logs
   

2. Enable the following options and set them up with the created directory in /etc/my.cnf configuration file.

   [mysqld]
   secure_log_path=/var/lib/mysqld-logs
   general-log=ON
   general-log-file=/var/lib/mysqld-logs/general_log
   slow-query-log=ON
   slow-query-log-file=/var/lib/mysqld-logs/slow_log
   buffered-error-log-size=1000
   buffered-error-log-filename=/var/lib/mysqld-logs/buffered_log 
   

3. Change the owner and group of the /var/lib/mysqld-logs directory and all its subdirectories and files to mysql.

   [root@localhost ~]# chown -R mysql:mysql /var/lib/mysqld-logs
   

4. Restart the MySQL server.

   [root@localhost ~]# systemctl restart mysql
   

5. Check that the slow query log and the general log are enabled for the MySQL server.

   [root@localhost ~]# mysql -e "select @@slow_query_log, @@general_log, @@secure_log_path"
   

   Expected output

   +------------------+---------------+-----------------------+
   | @@slow_query_log | @@general_log | @@secure_log_path     |
   +------------------+---------------+-----------------------+
   |                1 |             1 | /var/lib/mysqld-logs/ |
   +------------------+---------------+-----------------------+
   

6. Check that the slow query log and the general log are stored in the /var/lib/mysqld-logs directory.

   [root@localhost ~]# cd /var/lib/mysqld-logs/
   [root@localhost mysqld-logs]# ls -lrth
   

   Expected output

   -rw-r-----. 1 mysql mysqld-logs 240 Aug 18 11:56 localhost-slow.log
   -rw-r-----. 1 mysql mysqld-logs 565 Aug 18 11:56 localhost.log
   

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Last update: 2024-03-04