Release 2021_030 (2021-09-13)


  • [NixOS 21.05] sshd will be restarted.

NixOS 21.05 platform

  • webgateway: update haproxy to 2.3.14 for a critical security fix (CVE-2021-40346) (#PL-130098).

  • Use OpenSSH 8.7 for ssh/sshd. This fixes frequent sshd crashes caused by malicious connection attempts that fail. This update has potentially imcompatible changes that won’t affect common use of ssh. See for details (#PL-130095).

  • Mailserver: fix building the example config if there’s no config file, yet. Already released as hotfix (#PL-130086).

  • fc-agent: various logging fixes and improvements. Nix build errors are now easier to find in the journal and Graylog (#PL-130088).

  • journalbeat: add option flyingcircus.journalbeat.fields. This is used by default to add VM metadata to log messages that are sent out to loghosts/Graylog (#PL-130085).

  • jornalbeat: add VM resources info (cores, disk, iops, memory) to log messages (#PL-130097).

  • fc-agent and fc-garbage-collect: apply CPU/IO limitations and low priority settings via SystemD units to avoid load peaks and resulting alerts. This is often caused by iowait on HDD VMs. We tried to limit the impact before by using ionice and by limiting the amount of collected garbage but we still had problems on mostly idle machines or when agent and garbage collection ran at the same time (#PL-130083).

  • Ignore “other error” count on drives controlled by MegaRAID controllers to reduce monitoring noise (#PL-130057).

  • Production channel URL for this release:

NixOS 20.09 platform

Detailed Changes