local file reads are much more efficient than HEC
David Lang
On Tue, 2 Nov 2021, Mariusz Kruk via rsyslog wrote:
Date: Tue, 02 Nov 2021 22:25:09 +0100
From: Mariusz Kruk via rsyslog <rsyslog@lists.adiscon.com>
To: rsyslog-users <rsyslog@lists.adiscon.com>
Cc: Mariusz Kruk <k...@epsilon.eu.org>
Subject: Re: [rsyslog] (no subject)
Regarding rsyslog and Splunk - why don't you use omhttp and post directly to
HEC?
On 2 November 2021 20:17:40 CET, Milan Koudelka via rsyslog
<rsyslog@lists.adiscon.com> wrote:
Hi David,
thank you for your answer as well. This is a good hint. I'll remove it.
I'm trying to solve a problem with high-traffic log files which are
read by the log management system Splunk. Sometimes rsyslog writes
only part of the line, Splunk reads it and then rsyslog finishes the
line. That causes corrupted events in Splunk. I didn't find any
solution for that on Splunk. From the Splunk side, there are
recommendations to wait longer before the file is considered as closed
(Splunk parameters time_before_close). But that didn't help. I hoped
that some fine-tuning of how rsyslog writes the file could help, but I
see that it would be probably even worse with queues.
Milan Koudelka
Principal SW engineer
milan.koude...@gooddata.com
+420 776 313 414
Danube House
Karolinská 650/1
186 00 Prague 8, Czech Republic
Twitter | Facebook | LinkedIn | Blog
On Tue, Nov 2, 2021 at 7:24 PM David Lang <da...@lang.hm> wrote:
It's almost always a bad idea to use a queue with omfile, it's slower to put the
messages into the queue than to write them to disk
David Lang
On Tue, 2 Nov 2021, Milan Koudelka via rsyslog wrote:
> Date: Tue, 2 Nov 2021 11:15:29 +0100
> From: Milan Koudelka via rsyslog <rsyslog@lists.adiscon.com>
> To: rsyslog@lists.adiscon.com
> Cc: Milan Koudelka <milan.koude...@gooddata.com>
> Subject: [rsyslog] (no subject)
>
> Hi,
> I tried to switch some rsyslog configurations to advanced format to
> fine-tune actions.
>
> Instead of
> local1.* /mnt/log/gdc;RawMsg
>
> I wrote
> local1.* action(type="omfile" file="/mnt/log/gdc" template="RawMsg"
> ioBufferSize="128k" queue.size="50000" queue.type="linkedlist"
> queue.filename="gdc")
>
> As recommended, I kept other configurations as they were, if I don't
> need any advanced configuration.
>
> Eg.
> *.info;mail.none;authpriv.none;cron.none /mnt/log/messages
>
> But, I also changed legacy setting of file group ownership
> $FileGroup splunk
> $FileCreateMode 0640
> $DirGroup splunk
> $DirCreateMode 0650
>
> And I've put that directly to module load
> module(load="builtin:omfile" Template="RSYSLOG_TraditionalFileFormat"
> fileGroup="splunk" FileCreateMode="0640" dirGroup="splunk"
> DirCreateMode="0650")
>
> The problem is, only the files configured with advanced format are
> created with the correct group owner. /mnt/log/messages is created
> under root user. Do I need to add back the legacy setting and keep
> both in-module and legacy setting?
>
> Milan Koudelka
> Principal SW engineer
> milan.koude...@gooddata.com
> +420 776 313 414
>
> Danube House
> Karolinská 650/1
> 186 00 Prague 8, Czech Republic
> Twitter | Facebook | LinkedIn | Blog
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