Recently, one of our power users contributed OpenSearch data streams support to syslog-ng, which reminded me to also do some minimal testing on the latest OpenSearch release with syslog-ng. TL;DR: both worked just fine. Read more at https://www.syslog-ng.com/community/b/blog/posts/using-opensearch-data-streams-in-syslog-ng syslog-ng logo

The December syslog-ng newsletter is now on-line: File size-based log rotation in syslog-ng Syslog-ng release packages for RHEL & Co. Nightly syslog-ng RPM packages for RHEL & Co. It is available at https://www.syslog-ng.com/community/b/blog/posts/the-syslog-ng-insider-2025-12-logrotation-release-rpm-nightly-rpm syslog-ng logo

A long-waited feature for syslog-ng, the Kafka source, is getting ready soon. The development is still in progress, but you can already try it, and it is worth the effort. How? Using the very same tool the syslog-ng testing and release process relies on. From this blog you can learn how to download and patch syslog-ng git sources and build packages for popular RPM and DEB Linux distributions. Once you have installable packages, comes the fun part: getting the Kafka source working.

The October syslog-ng newsletter is now on-line: The core values of syslog-ng Running syslog-ng in BastilleBSD Debian and Ubuntu blogs updated It is available at https://www.syslog-ng.com/community/b/blog/posts/the-syslog-ng-insider-2025-10-values-bastillebsd-debian syslog-ng logo

Version 4.10.1 is a bugfix release, not needed by most users. It fixes the syslog-ng container and platform support in some less common situations. Before you begin I assume that most people are lazy and/or overbooked, just like me. So, if you already have syslog-ng 4.10.0 up and running, and packaged for your platform, just skip this bugfix release. What is fixed? You can now compile syslog-ng on FreeBSD 15 again.

Version 4.10 of syslog-ng introduced file size-based log rotation. Thanks to this, storage space is no longer filled with logs with the risk that you might not see older logs if the message rate is higher than expected. Read more at https://www.syslog-ng.com/community/b/blog/posts/file-size-based-log-rotation-in-syslog-ng syslog-ng logo

Version 4.10.0 of syslog-ng is now available. Among others it adds: support for file size based logrotation a filter that test if a value is blank updated MongoDB driver support For more details check the syslog-ng release notes at https://github.com/syslog-ng/syslog-ng/releases/tag/syslog-ng-4.10.0 This release fixes several bugs introduced in syslog-ng version 4.9.0, which is the syslog-ng version available in openSUSE Leap 16.0 and Fedora 43. It’s feature freeze (and thus package version freeze) for both distros, but do not worry: bug fixes are back ported.

I have been providing syslog-ng users with weekly git snapshot RPM packages for almost a decade. From now on, RHEL & Co users can use nightly packages provided by the syslog-ng team, and from a lot less obscure location. As usual, these packages are for testing, not for production. Read more at https://www.syslog-ng.com/community/b/blog/posts/nightly-syslog-ng-rpm-packages-for-rhel-co syslog-ng logo

Whenever I present syslog-ng at a conference or I stand next to a booth, people often ask me why should they use syslog-ng instead of one of its competitors. So let me summarize what the users and developers of syslog-ng typically consider as its most important values. Documentation Yes, I know, this is not syslog-ng itself. However, talking to some of our most active and loyal users, one common feedback was that they had chosen syslog-ng because of the quality of its documentation.

The August syslog-ng newsletter is now on-line: Deprecating Java-based drivers from syslog-ng: Is HDFS next? Your first steps configuring syslog-ng Prometheus exporter in syslog-ng It is available at https://www.syslog-ng.com/community/b/blog/posts/the-syslog-ng-insider-2025-08-hdfs-configuration-prometheus syslog-ng logo