topic rsyslog -> splunk UDP port 515 in Getting Data In

rsyslog -> splunk UDP port 515

jeremymiller — Thu, 06 Sep 2012 14:02:22 GMT

Hi, I already have a syslog receiver (rsyslogd) that receives ALL syslog messages from our environment. I configured it to forward everything to 127.0.0.1 UDP port 515. Then I added a UDP Network data input in Splunk of port 515 of type syslog.

However, every event in Splunk has timestamp localhost prepended to it like so:
Sep 6 14:00:32 localhost Sep 6 14:00:32 uskyarpts08s0.mydomain.com vsftpd[4174]: warning: can't get client address: Connection reset by peer

Is there any way to make it so the original syslog host (uskyarpts08s0) is preserved as the actual source host and the localhost is not prepended?

Re: rsyslog -> splunk UDP port 515

MarioM — Thu, 06 Sep 2012 15:21:43 GMT

you can tell splunk to not prepend in inputs.conf with no_appending_timestamp=true:

no_appending_timestamp = [true|false]
* If this attribute is set to true, Splunk does NOT append a timestamp and host to received events.
* NOTE: Do NOT include this attribute if you want to append timestamp and host to received events.
* Default is false.

You can override host as well with props & transforms:

props.conf

[source::udp:515]
TRANSFORMS-extract_host = hostoverride

transforms.conf:

[hostoverride]
DEST_KEY = MetaData:Host
REGEX = ^\w+\s+\d+\s+\d+:\d+:\d+\s+\w+\s+\w+\s+\d+\s+\d+:\d+:\d+\s+(\S+)
FORMAT = host::$1