Remove the pri-tag from rsyslog messages

Elastic Stack Logstash
1

Hi,

I'm trying to put postfix logs to elasticsearch.

I'm stuck with parsing the pri-tag - in fact, I want to remove it from the message.

Here's a line from logs being sent:

<22>Aug 21 18:34:14 mailserver postfix/qmgr[1842]: 37C0E2D1C: removed

I want to remove that number <22>

I've found this thread Remove part of message string but even when adding a gsub like

mutate {
gsub => ["message", "<22>", ""]
}

it doesn't work.

Any help is appreciated

Regards

Daniel

2

With a simple configuration like

 input { generator { count => 1 lines => [ '<22>Aug 21 18:34:14 mailserver postfix/qmgr[1842]: 37C0E2D1C: removed' ] } }
filter {
    mutate { gsub => ["message", "<22>", ""] }
}
output { stdout { codec => rubydebug { metadata => false } } }

It most certainly does work

   "message" => "Aug 21 18:34:14 mailserver postfix/qmgr[1842]: 37C0E2D1C: removed",

Although I would recommend

mutate { gsub => ["message", "^<\d+>", ""] }
3

thanks a lot for your swift reply.

I do not understand why your mutate statement works while mine didn't.

4

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