This is a part of the rsyslog.conf documentation.

Modules

Rsyslog has a modular design. This enables functionality to be dynamically loaded from modules, which may also be written by any third party. Rsyslog itself offers all non-core functionality as modules. Consequently, there is a growing number of modules. Here is the entry point to their documentation and what they do (list is currently not complete)

Please note that each module provides configuration directives, which are NOT necessarily being listed below. Also remember, that a modules configuration directive (and functionality) is only available if it has been loaded (using $ModLoad).

It is relatively easy to write a rsyslog module. If none of the provided modules solve your need, you may consider writing one or have one written for you by Adiscon's professional services for rsyslog (this often is a very cost-effective and efficient way of getting what you need).

Input Modules

Input modules are used to gather messages from various sources. They interface to message generators.

imfile - input module for text files
imrelp - RELP input module
imudp - udp syslog message input
imtcp - input plugin for plain tcp syslog
imgssapi - input plugin for plain tcp and GSS-enabled syslog
immark - support for mark messages
imklog - kernel logging
imuxsock - unix sockets, including the system log socket
imsolaris - input for the Sun Solaris system log source
im3195 - accepts syslog messages via RFC 3195

Output Modules

Output modules process messages. With them, message formats can be transformed and messages be transmitted to various different targets.

omsnmp - SNMP trap output module
omtdout - stdout output module (mainly a test tool)
omrelp - RELP output module
omgssapi - output module for GSS-enabled syslog
ommysql - output module for MySQL
ompgsql - output module for PostgreSQL
omlibdbi - generic database output module (Firebird/Interbase, MS SQL, Sybase, SQLLite, Ingres, Oracle, mSQL)
ommail - permits rsyslog to alert folks by mail if something important happens
omoracle - output module for Oracle (native OCI interface)

Library Modules

Library modules provide dynamically loadable functionality for parts of rsyslog, most often for other loadable modules. They can not be user-configured and are loaded automatically by some components. They are just mentioned so that error messages that point to library moduls can be understood. No module list is provided.

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