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<p class="MsoNormal"><span style="color:#7030A0">Hi Gabor,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">“<i>This is strange: the d_localfile destinations (<span style="background:white">as well as the vrf-socket destination "d_mgmt_vrf_socket"</span>) receive messages from the syslog() source, but not from the
internal() or system() sources?”<o:p></o:p></i></span></p>
<p class="MsoNormal"><span style="color:#7030A0">Yes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span style="color:#7030A0">And the issue vanishes when "d_mgmt_vrf_socket" destination is removed?<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="color:#7030A0">Yes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">I could not test the 2 last suggestions that you made.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">We did however another test, which was to
<b>remove the reliable</b> option from d_mgmt_vrf_socket, and it seems the <b>problem is not seen again</b>.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">Besides from what it is written in the manual, in other which cases/conditions can syslog-ng loose logs?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0">reliable() <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0">Type:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0">yes|no<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0">Default:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0">no<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#7030A0">Description: If set to yes, syslog-ng OSE cannot lose logs in case of reload/restart, unreachable destination or syslog-ng OSE crash. This solution provides
a slower, but reliable disk-buffer option. It is created and initialized at startup and gradually grows as new messages arrive. If set to no, the normal disk-buffer will be used. This provides a faster, but less reliable disk-buffer option.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#7030A0"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">Thanks in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7030A0">Alex<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Gabor Nagy (gnagy) <Gabor.Nagy@oneidentity.com>
<br>
<b>Sent:</b> 25 de março de 2022 14:44<br>
<b>To:</b> Alexandre Santos <ASantos@infinera.com>; Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu><br>
<b>Subject:</b> Re: Local sources seem not to be working<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">Hi Alex,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><br>
Sorry I haven't answered yet. I'll have a few ideas I would like to try out next week.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><br>
This is strange: the d_localfile destinations (<span style="background:white">as well as the vrf-socket destination "d_mgmt_vrf_socket"</span>) receive messages from the syslog() source, but not from the internal() or system() sources?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">And the issue vanishes when "d_mgmt_vrf_socket" destination is removed?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">If it would be soft flow-control, then the syslog() source would be suspended too.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black;background:white">Just a tip: would you switch out the unix-dgram() destination to syslog() destination, please? Maybe that's not possible with the VRF in-place...</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><br>
In the stats output, do you see an increased number of dropped messages?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">I would still suggest increasing the 4MB disk-buffer. You should make an estimation of how long could the mgmt syslog-ng be down (i.e not receiving from the unix-dgram), what is the average incoming EPS and an
average message size, that could give a hint about the required disk-buffer size.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><br>
Regards,<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="color:black">Gabor<br>
<br>
<o:p></o:p></span></p>
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