RFC5424 structured data parsing module (mmpstrucdata)

Module Name: mmpstrucdata

Author: Rainer Gerhards <rgerhards@adiscon.com>

Available since: 7.5.4

Description:

The mmpstrucdata parses RFC5424 structured data into the message json variable tree. The data parsed, if available, is stored under "jsonRoot!rfc5424-sd!...".

Module Configuration Parameters:

Currently none.

Action Confguration Parameters:

jsonRoot - default "!"
Specifies into which json container the data shall be parsed to.

See Also

Howto anonymize messages that go to specific files

Caveats/Known Bugs:

this module is currently experimental; feedback is appreciated
property names are treated case-insensitive in rsyslog. As such, RFC5424 names are treated case-insensitive as well. If such names only differ in case (what is not recommended anyways), problems will occur.
structured data with duplicate SD-IDs and SD-PARAMS is not properly processed

Samples:

In this snippet, we parse the message and emit all json variable to a file with the message anonymized. Note that once mmpstrucdata has run, access to the original message is no longer possible (execept if stored in user variables before anonymization).

module(load="mmpstrucdata") action(type="mmpstrucdata") template(name="jsondump" type="string" string="%msg%: %$!%\n") action(type="omfile" file="/path/to/log" template="jsondump")

A more practical one:

Take this example message (inspired by RFC5424 sample;)):

<34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 [exampleSDID@32473 iut="3" eventSource="Application" eventID="1011"][id@2 test="tast"] BOM'su root' failed for lonvick on /dev/pts/8

We apply this configuration:

module(load="mmpstrucdata") action(type="mmpstrucdata") template(name="sample2" type="string" string="ALL: %$!%\nSD: %$!RFC5424-SD%\nIUT:%$!rfc5424-sd!exampleSDID@32473!iut%\nRAWMSG: %rawmsg%\n\n") action(type="omfile" file="/path/to/log" template="sample2")

This will output:

ALL: { "rfc5424-sd": { "examplesdid@32473": { "iut": "3", "eventsource": "Application", "eventid": "1011" }, "id@2": { "test": "tast" } } } SD: { "examplesdid@32473": { "iut": "3", "eventsource": "Application", "eventid": "1011" }, "id@2": { "test": "tast" } } IUT:3 RAWMSG: <34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 [exampleSDID@32473 iut="3" eventSource="Application" eventID="1011"][id@2 test="tast"] BOM'su root' failed for lonvick on /dev/pts/8

As you can seem, you can address each of the individual items. Note that the case of the RFC5424 parameter names has been converted to lower case.

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