RSyslog Documentation

ommysql: MySQL Database Output Module

Module Name:ommysql
Author:Michael Meckelein (Initial Author) / Rainer Gerhards <>


This module provides native support for logging to MySQL databases. It offers superior performance over the more generic omlibdbi module.

Configuration Parameters


Parameter names are case-insensitive.

Action Parameters


typedefaultmandatoryobsolete legacy directive

This is the address of the MySQL-Server.


typedefaultmandatoryobsolete legacy directive

This is the unix socket path of the MySQL-Server. When the server address is set localhost, the mysql client library connects using the default unix socket specified at build time. If you run mysql server and run the unix socket path differently than the default, you can set the socket path with this option.


typedefaultmandatoryobsolete legacy directive

This is the name of the database used.


typedefaultmandatoryobsolete legacy directive

This is the user who is used.


typedefaultmandatoryobsolete legacy directive

This is the password for the user specified in UID.


typedefaultmandatoryobsolete legacy directive

Permits to select a non-standard port for the MySQL server. The default is 0, which means the system default port is used. There is no need to specify this parameter unless you know the server is running on a non-standard listen port.


typedefaultmandatoryobsolete legacy directive

Permits the selection of an optional MySQL Client Library configuration file (my.cnf) for extended configuration functionality. The use of this configuration parameter is necessary only if you have a non-standard environment or if fine-grained control over the database connection is desired.


typedefaultmandatoryobsolete legacy directive

Permits the selection of the section within the configuration file specified by the $OmMySQLConfigFile parameter. This will likely only be used where the database administrator provides a single configuration file with multiple profiles. This configuration parameter is ignored unless $OmMySQLConfigFile is also used in the rsyslog configuration file. If omitted, the MySQL Client Library default of “client” will be used.


typedefaultmandatoryobsolete legacy directive

Rsyslog contains a canned default template to write to the MySQL database. It works on the MonitorWare schema. This template is:

$template tpl,"insert into SystemEvents (Message, Facility, FromHost,
Priority, DeviceReportedTime, ReceivedAt, InfoUnitID, SysLogTag) values
('%msg%', %syslogfacility%, '%HOSTNAME%', %syslogpriority%,
'%timereported:::date-mysql%', '%timegenerated:::date-mysql%', %iut%,

As you can see, the template is an actual SQL statement. Note the “,SQL” option: it tells the template processor that the template is used for SQL processing, thus quote characters are quoted to prevent security issues. You can not assign a template without “,SQL” to a MySQL output action.

If you would like to change fields contents or add or delete your own fields, you can simply do so by modifying the schema (if required) and creating your own custom template.


Example 1

The following sample writes all syslog messages to the database “syslog_db” on The server is being accessed under the account of “user” with password “pwd”.

action(type="ommysql" server="" serverport="1234"
       db="syslog_db" uid="user" pwd="pwd")

See also

Help with configuring/using Rsyslog:

  • Mailing list - best route for general questions
  • GitHub: rsyslog source project - detailed questions, reporting issues that are believed to be bugs with Rsyslog
  • Stack Exchange (View, Ask) - experimental support from rsyslog community

See also

Contributing to Rsyslog:

Copyright 2008-2020 Rainer Gerhards (Großrinderfeld), and Others.

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