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Bug #3604

closed

When using rsyslog with a version > 5.7.1 on the server, some reports may be dropped, leading to NoAnswer on the server

Added by Nicolas CHARLES about 9 years ago. Updated over 7 years ago.

Status:
Released
Priority:
1
Category:
Techniques
Target version:
Severity:
UX impact:
User visibility:
Effort required:
Priority:

Description

Rsyslog introduced a "rate limiting" feature in rsyslog 5.7.1 ( http://www.rsyslog.com/tag/rate-limiting/ )
So we can face log message like

imuxsock begins to drop messages from pid 30351 due to rate-limiting

along with incomplete reporting on the server.

A workaround ( ref http://www.gossamer-threads.com/lists/rsyslog/users/8513 ) is to add the config

$SystemLogRateLimitInterval 0

However, this should be added only for version that support it (I guess 5.7.1, but I couldn't find where it was introduced)

Actions #1

Updated by Nicolas PERRON about 9 years ago

  • Status changed from New to In progress
  • Assignee set to Nicolas PERRON

Nicolas CHARLES wrote:

[...]
However, this should be added only for version that support it (I guess 5.7.1, but I couldn't find where it was introduced)

Ok, I will search for the right version before to add a workaround

Actions #2

Updated by Nicolas PERRON about 9 years ago

The changelog of rsyslog does not indicate when imuxsock module has been added (it seems to exist since the first versions) but the parameter to workaround this bug has been added since 5.7.1:

From http://www.rsyslog.com/changelog-for-5-7-1-v5-devel/ :

added new config statements

    $InputUnixListenSocketUsePIDFromSystem
    $SystemLogUsePIDFromSystem
    $SystemLogRateLimitInterval
    [...]
Actions #3

Updated by Nicolas PERRON about 9 years ago

I'm not sure on how to check the version of rsyslog with CFEngine.

On shell these commands are OK:

rpm -qi rsyslog | grep 'Version' | awk '{print $3}'

dpkg -l | grep 'rsyslog ' | awk '{print $3}'

dpkg -s rsyslog | grep 'Version' | awk '{print $2}'

But I don't see how to ensure that they are not more recent than 5.7.1

Actions #4

Updated by Nicolas PERRON about 9 years ago

Another solution could be to check the OS version and Service Pack since rsyslog in a OS version or Service Pack should not make major upgrade.

Actions #5

Updated by Nicolas PERRON about 9 years ago

Another method suggested by Nicolas is to use CFEngine to install rsyslog =< 5.7.1 in WarnOnly to throw classes and use them to add the configuration in rsyslog or not.

Actions #6

Updated by Nicolas PERRON about 9 years ago

Nicolas PERRON wrote:

Another method suggested by Nicolas is to use CFEngine to install rsyslog =< 5.7.1 in WarnOnly to throw classes and use them to add the configuration in rsyslog or not.

WarnOnly doesn't seem to work with packages promises... Then I will make a module instead.

Actions #7

Updated by Nicolas PERRON about 9 years ago

  • % Done changed from 0 to 10

A module containing something like:

#!/bin/bash
set -e

TARGET_VER='5.7.1'
LOCAL_RPM_VER=`rpm -qi rsyslog | grep 'Version' | awk '{print $3}'`
LOCAL_DPKG_VER=`dpkg -s rsyslog | grep 'Version' | awk '{print $2}'`

for LOCAL_VER in $LOCAL_RPM_VER $LOCAL_DPKG_VER
do
  if [ "$LOCAL_VER" \> "$TARGET_VER" ];then
    echo "+rsyslog_not_older_than_5_7_1" 
  else
    echo "+rsyslog_older_than_5_7_1" 
  fi
done

Should be called to know if the configuration line has to be added.

Actions #8

Updated by Nicolas PERRON about 9 years ago

  • Status changed from In progress to Pending technical review
  • Assignee changed from Nicolas PERRON to Jonathan CLARKE
  • % Done changed from 10 to 100
  • Pull Request set to https://github.com/Normation/rudder-techniques/pull/133

As suggested byJon, the use of rsyslogd to retrieve the version is better.

I've made a Pull Request: https://github.com/Normation/rudder-techniques/pull/133

Jon or Nico, could you review it please ?

Actions #9

Updated by Nicolas PERRON about 9 years ago

  • Status changed from Pending technical review to Pending release

Applied in changeset commit:b4a2d5a0a20a07b853b012bc2dea6408f23b7800.

Actions #10

Updated by Jonathan CLARKE about 9 years ago

Applied in changeset commit:a1d1443d6e71d712761be7fb4edc360ded14a42f.

Actions #11

Updated by Nicolas PERRON about 9 years ago

  • Status changed from Pending release to Released
Actions #12

Updated by Benoît PECCATTE over 7 years ago

  • Project changed from 24 to Rudder
  • Category changed from Techniques to Techniques
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