rsyslog 8.31 – an important release

Today, we release rsyslog 8.31. This is probably one of the biggest releases in the past couple of years. While it also offers great new functionality, what really important about it is the focus on further improved software quality.

Let’s get a bit down on it. First let’s mention some important new features:

And then we have a set of several hundred commits concerned with improved software quality:
  • testbench dynamic tests have been extended
  • coverage of different compilers and compiler options has been enhanced
  • more modules are automatically scanned by static analysis
  • daily Coverity scans were added to the QA system, which have proofen to be a very useful addition
  • more aggressive and automated testing with threading debuggers (valgrind’s helgrind and clang thread sanitizer) has been added, also with great success
  • as a result of these actions, we could find and fix many small software defects.
  • and there also have been some big and important fixes, namely for imjournal, omelasticsearch, mmdblookup and the rsyslog core
Many users were involved in finding and fixing bugs, many of which all I do know from is there github handle. So rather than highlighting just some of them, I would like to refer to the github milestone issue tracker where all can be found. My sincere thanks to everyone for all their support!
 
I consider rsyslog release 8.31 a major step forward in our QA policy. We already had improved quite a bit and the state was already pretty good. However, with the changes introduced in 8.31, we make a big step forward, into a kind of next-gen QA policy. Of course, QA is a journey and not a “do once” target. So expect more good stuff upcoming in the next releases. We are not done yet!
I would like to use this opportunity to express a personal “thank yo” to Thomas Deutschmann, also know as Whissi for all his good advice and sometimes strong words that drive use towards better quality. While many folks have helped us with this, Whissi is consistenytly insisting on good QA policies for a long time now, and he always was persistent in fighting with me when I did not understand the value or did not want to. Whissi, I admit I sometimes wasn’t too fond of you, but believe me, at the end of the day I *really* value what you are doing. You have my deepest respect. Looking forward to many more years of discussions!

new rsyslog 7.4 stable branch released

We just released rsyslog 7.4.0, a new stable release which replaces the 7.2 branch. After nine month of hard work, there are many exciting enhancements compared to 7.2, and I thought I give you a quick rundown of the more important new features. Note that while I list some “minor features” at the end of this posting, the list is not complete. I left out those things that are primarily of interest for smaller groups of users. So if you look for a specific feature not mentioned here, it may pay to look at the ChangeLog or post a question to the rsyslog mailing list.

With this release, the rsyslog project officially supports version 7.4. Support for 7.2 will gradually be phased out. If support for older versions is required, utilizing Adiscon’s professional services for rsyslog is recommended.

Note that I only list main headlines for each of the features. Follow links (where provided) to gain more in-depth information.

Security Package

 

Improved Rate-Limiters

  • introduction of Linux-like rate-limiting for all inputs
  • “Last message repeated n times” now done on a per-input basis; makes it much more useful AND increases processing speed.

Systemd Journal support

  • omjournal writes messages to the journal
  • imjournal obtains messages including journal-specific meta data items from the journal

Performance Improvements

  • Disk Queue Performance greatly improved
  • DNS cache greatly improved and optimized
  • output file writer (omfile) now fully supports background writing
  • script optimizer now changes frequently-used long-running filters into equivalent quick ones when possible (this even affects some distros default configs and is a great performance saver)

Minor Features

  • various plugins now support the new RainerScript based config language
  • omlibdbi improvements, among them support for transactions
  • ommysql now supports transactions
  • improved omfile zip writing speed
  • performance optimizations
  • omelasticsearch improvements (bulk processing mode, local error file)
  • omudpspoof now supports packets larger than 1472 by using fragmentation
  • omrelp now supports session timeout
  • contributed module (not project-supported) omrabbitmq was added